• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A system, method and crossover apparatus for a gas separator for an electric submersible pump (ESP). A crossover of a gas separator for EPS has a first helical path for a higher density fluid that extends at an angle of 10 ° to 40 ° from a horizontal plane across the cross, the first path helicoidal being fluidically coupled to a star support comprising crescent-shaped fins which eliminate the rotational impulse of the higher density fluid, a second helical path for the lower density fluid which intersects a crossover sleeve tangentially , the first helical path and the second helical path defined by a channel having water drop-shaped apertures in the crossover which define channel output ports discharging to a casing ring, and apertures in the form of drop of water in a crossover shirt that define a channel inlet, where the first helical path is around the canal and the second traje t helical passes through an interior of the canal.
    公开号:FR3070447A1
    申请号:FR1857556
    申请日:2018-08-20
    公开日:2019-03-01
    发明作者:Donn J. Brown；Thomas John Gottschalk；Walter Russell Dinkins；Jimmie Allen BUCKALLEW
    申请人:Halliburton Energy Services Inc；
    IPC主号:
    专利说明:

    CROSSING SYSTEM AND APPARATUS FOR AN ELECTRIC SUBMERSIBLE GAS SEPARATOR
    BACKGROUND OF THE INVENTION [001] 1. FIELD OF THE INVENTION [002] The embodiments of the invention described here relate to the field of gas separators for electric submersible pumps. More particularly, but not limited to, one or more embodiments of the invention allow a system, a method and a crossing apparatus for an electric submersible gas separator.
    2. DESCRIPTION OF THE RELATED TECHNIQUE [004] A fluid, such as gas, oil or water, is often located in underground formations. In such situations, the fluid must be pumped to the surface so that it can be collected, separated, refined, distributed and / or sold. Centrifugal pumps are typically used in electric submersible pump (PSE) applications to lift a well fluid to the surface. Centrifugal pumps transmit energy to a fluid by accelerating the fluid through a rotary turbine associated with a stationary diffuser, collectively referred to as "stage". Multistage centrifugal pumps use multiple stages of turbine and diffuser pairs to further increase pressure relief.
    Pumping a gas loaded fluid is a challenge for an economical and efficient PES operation. When pumping the gas-filled fluid, the gas may separate from the other fluid due to the pressure differential created during the operation of the pump. If the volume fraction of gas (FVG) is high enough, typically around 10% to 15%, the pump may lose its efficiency and decrease its capacity or load (slip). If the gas continues to accumulate on the suction side of the turbine, it can completely block the passage of another fluid through the centrifugal pump. When this happens, the pump is said to be "blocked by gas" because the proper functioning of the pump is hampered by the buildup of gas.
    Conventional PES often include a gas separator attached under the centrifugal pump to try to separate the gas from the multiphase fluid before the gas reaches the pump. The two most common types of gas separators are vortex type separators and rotary type separators. Both vortex and rotary separators separate the gas from the well fluid by rotational inertia before the fluid enters the pump. Such centrifugal separation results in a gas-dense fluid of higher density outward, while a gas-rich fluid of lower density remains in the interior near the shaft. Then, the fluid moves to a crossover that separates the two fluid streams.
    The lower density gas rich fluid drains into the tubing ring between the EPS assembly and the well casing, while the higher density low gas fluid is guided to the centrifugal pump.
    As the gas separators use the inertia of the rotational movement to separate the fluid, the fluid entering the growth is swirling. Since the crossing directs a gas-rich fluid and a gas-poor fluid in different directions, the swirling fluid changes direction abruptly inside the conventional crossing. Sudden changes in direction cause disturbing turbulence which degrades the efficiency of the gas separator. The turbulence prevents the flow of the fluid, causing an accumulation of gases and the coalescence of the bubbles inside the conventional crossing. The gas bubbles can be trapped in a fluid circulating in the pump, leading to a gas lock. In addition, the lower density gas rich fluid directed to the casing ring easily loses its momentum, often preventing the gas from simply reaching the casing ring.
    Conventionally, the trajectory of a fluid poor in gas of higher density, flowing towards the centrifugal pump also includes tight turns when the fluid of higher density circulates around the discharge ports of the lower fluid density. The induced turbulence causes collisions between the higher density fluid and the walls of the crossing passage. Since the higher density fluid is often loaded with abrasive solids, this results in changes in internal pressure, erosive damage and blockage by scale inside the conventional crossing.
    Another problem also encountered with conventional crossings is that the higher density fluid leaving the crossover retains a residual rotational pulse, sometimes called "pre-rotation". The pre-rotation of the fluid at the pump inlet will limit the cutting by the fins of the turbine of the pump of the production fluid and the distribution of the fluid downstream. As a result, the pre-rotation of the well fluid will degrade the efficiency and overall performance of the pump, which can limit the production rate of the entire EPS.
    As is apparent from the above, the conventional crosses used in gas separators have several defects. Therefore, there is a need for an improved crossing apparatus, method and system for an electric submersible gas separator.
    BRIEF SUMMARY OF THE INVENTION One or more embodiments of the invention provide an apparatus, method and crossover system for an electric submersible gas separator.
    An apparatus, a method and a crossing system for an electric submersible as a separator are described. An illustrative embodiment of a crossing of a gas separator for an electric submersible pump (EPS) comprises a teardrop-shaped channel extending helically between and through a crossing skirt at an inlet of the channel, the crossing skirt inside a crossing shirt, the crossing shirt at an outlet of the canal, the outlet of the canal above the entrance of the canal and the teardrop shape of the canal having a rounded side opposite a pointed side and a top surface of the channel extending therebetween, wherein the top surface of the channel extends between ten degrees and forty degrees upward from the pointed side, and the channel defining a first helical passage inside the channel for a gas-rich fluid of lower density flowing inside the passage, in which the first helical passage tangentially cuts the crossing jacket and a second pass helical age around the channel for a fluid lean in gas of higher density flowing outside the passages, and a star support fluidly coupled to the fluid lean in gas of lower density downstream of the second helical passage, the star support comprising a plurality of crescent shaped star fins extending radially outward from a star support hub, the crescent shaped star fins having a concave surface receiving a low gas fluid of higher density entering. In certain embodiments, the crossing jacket is fixed inside a gas separator box downstream from one of the rotary or vortex generator. In some embodiments, the channel outlet is aligned with a housing port through the gas separator housing so that the channel outlet is fluidly coupled to a tubing ring. In some embodiments, the channel inlet is positioned on a concave top portion of the crossing skirt. In some embodiments, the position of the channel inlet on the concave top portion of the crossing skirt curves the channel inlet to align tangentially with the curvature of the gas-dense fluid of lower density entering the entrance to the canal. In some embodiments, each channel inlet is 10 to 70% larger than conventional inlet ports in comparable conventional gas separator designs. In some embodiments, an upper surface of a top wall of the channel extends from ten to forty degrees from the horizontal and guides a gas-poor fluid of higher density on the same path. In some embodiments, each channel curves when the channel extends upward from the crossing skirt to the crossing shirt. In some embodiments, the channel tangentially cuts the jacket. In some embodiments, the tangential intersection guides the fluid out of the crossing outlet tangentially to an inner wall of the crossing jacket. In certain embodiments, the star support imparts an axial impulse to the gas-poor fluid, of higher density exiting flowing around the passages. In some embodiments, the star support provides radial support to a shaft extending centrally across the crossing. In some embodiments, the higher density gas rich fluid is delivered to a centrifugal pump with a lower FVG and reduced pre-rotation.
    An illustrative embodiment of a crossing of a gas separator for an electric submersible pump (EPS) comprises a first helical path which guides a gas-poor fluid of higher density at an angle of 10 to 40 degrees relative to a horizontal plane when the lean gas of higher density moves through the crossing, the first helical path fluidly coupled to a star support comprising crescent-shaped fins which eliminate the rotary impulse from the fluid poor in gas of higher density when the fluid poor in gas of higher density leaves the crossing; and a second helical path which guides the gas-rich fluid of lower density tangentially through exit ports of the crossing which evacuates towards a casing ring and the first helical path and the second helical path defined by a channel having openings in teardrop shape in a crossing jacket which define the outlet ports and teardrop openings in the crossing skirt which define an entry into the channel, where the first helical path is around the channel and the second helical path crosses an interior of the channel. In some embodiments, the teardrop-shaped openings in the crossing skirt are positioned on a concave top portion of the skirt. In certain embodiments, the curved orientation of the teardrop-shaped openings extending around the concave top portion of the skirt provides the gas-rich fluid of lower density with an inlet oriented tangentially towards the helical passage. of gas-poor fluid. In some embodiments, each teardrop-shaped opening on the crossing skirt has a surface area of 10 to 70% larger than conventional crossing skirt openings. In some embodiments, a top surface of the channel extends upward from ten to forty degrees from the horizontal and guides the higher density gas-poor fluid upward along the same path. In some embodiments, the channel tangentially cuts the jacket. In certain embodiments, the star support imparts an axial impulse to the gas-poor fluid of higher density circulating around the passages and continuing after the star support. In some embodiments, the star support provides radial support to a drive shaft extending through the crossover. In some embodiments, the crossing of a gas separator for EPS includes a plurality of channels.
    An illustrative embodiment of a process for the separation of a gas-poor fluid of higher density from a gas-rich fluid of lower density in a gas separator which separates a multiphase fluid by rotational inertia consists maintaining a helical trajectory of the lower density gas-rich fluid by sending the lower density gas-rich fluid through an interior of a helical, teardrop-shaped channel which discharges the discharge toward a tubing ring, maintaining a helical path of the leaner gas of higher density fluid by sending the leaner gas of higher density fluid around the helical channel, and eliminating the rotary pulse of the leaner gas of density gas higher after the higher density gas-poor fluid passes around the helical channel, guiding the higher density gas-poor fluid through a star support having crescent-shaped fins and a concave surface which curves in a direction opposite to the direction of rotation of the gas-poor fluid of higher density. In some embodiments, the method further includes transferring the higher density gas-poor fluid to a pump inlet with a lower rotary pulse and FVG than the fluid entering the gas separator.
    [015] In other embodiments, features of specific embodiments can be combined with features of other embodiments. For example, the features of one embodiment can be combined with features of any of the other embodiments. In other embodiments, additional features can be added to the specific embodiments described here.
    BRIEF DESCRIPTION OF THE DRAWINGS [016] The advantages of the present invention can become obvious to those skilled in the art, benefiting from the following detailed description and with reference to the accompanying drawings in which:
    FIG. 1 is a perspective view of an electric submersible pump (PSE) assembly of an illustrative embodiment.
    [018] Figure 2 is a cross-sectional view of a gas separator of an illustrative embodiment.
    [019] FIGS. 3A to 3B are cross-sectional views of a separation and crossing chamber of an illustrative embodiment.
    [020] Figure 4 is a side elevational view of an exemplary crossing of an illustrative embodiment.
    [021] Figure 5 is a side elevational view of an example skirt of an illustrative embodiment.
    [022] FIG. 6A is a plan view from below of an exemplary crossing of an illustrative embodiment.
    [023] Figure 6B is a cross-sectional view of an exemplary crossing of an illustrative embodiment.
    FIG. 6C is a perspective view of an example of a skirt of an illustrative embodiment.
    [025] Figure 6D is a perspective view of an exemplary crossover of an illustrative embodiment.
    [026] FIG. 6E is a perspective view of an example of crossing with an adjustable shirt of an illustrative embodiment.
    [027] Figure 6F is another perspective view of an example of crossing with an adjustable skirt of an illustrative embodiment.
    [028] FIG. 6G is yet another perspective view of an example of crossing with an adjustable shirt of an illustrative embodiment.
    [029] FIG. 7A is a perspective view of an example of a star support of an illustrative embodiment.
    [030] Figure 7B is a side elevational view of an example of a star support of an illustrative embodiment.
    [031] FIG. 7C is a top plan view of an example of a star support of an illustrative embodiment.
    [032] Although the invention is capable of various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and can be described here in detail. Drawings may not be to scale. It will be understood, however, that the embodiments described here and represented in the drawings are not intended to limit the invention to the particular form described, but on the contrary, the intention is to cover all the modifications, equivalents and variants entering into the scope of the present invention as defined by the appended claims.
    DETAILED DESCRIPTION [033] A crossover system, method and apparatus for an electric submersible gas separator are described. In the following example description, many specific details are presented in order to allow a more in-depth understanding of embodiments of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without incorporating all aspects of the specific details described here. In other cases, specific characteristics, quantities or measures well known to those skilled in the art have not been described in detail so as not to obscure the invention. Readers should note that, although examples of the invention are presented here, the claims and the full range of all equivalents are what really define the limits and limits of the invention.
    [034] As used in this description and in the appended claims, the singular forms "one", "one" and "the" include references to the plural unless the context clearly indicates otherwise. Thus, for example, a reference to an "opening" includes one or more openings.
    [035] "Coupled" denotes either a direct connection or an indirect connection (for example, at least one intermediate connection) between one or more objects or components. The expression "directly attached" means a direct connection between objects or components.
    As used herein, the term "external", "exterior" or "outward" denotes the radial direction away from the center of the shaft of a PES assembly member such as a separator gas and / or the opening of a component through which the shaft would extend.
    [037] As used herein, the term "internal", "interior" or "inward" refers to the radial direction toward the center of the shaft of a PES assembly member such as a separator gas and / or the opening of a component through which the shaft would extend.
    [038] As used here, the terms “axial”, “axially”, “longitudinal” and “longitudinally” designate indifferently the direction extending over the length of the shaft of an assembly component of EPS, such as a PSE inlet, a multistage centrifugal pump, a sealing section, a gas separator or a charge pump.
    [039] "Downstream" refers to the direction substantially in the direction of the main flow of a working fluid when the pump assembly is in operation. By way of example, but not limitation, in a set of vertical downhole EPSs, the downstream direction may be towards the surface of the well. The "top" of an element refers to the most downstream side of the element.
    [040] "Upstream" refers to the direction substantially opposite to the main flow of a working fluid when the pump assembly is in operation. By way of example, but not limitation, in a set of vertical downhole EPSs, the upstream direction may be opposite the surface of the well. The "background" of an element refers to the most upstream side of the element.
    [041] A “drop of water” designates a shape having a wider rounded side or end opposite to a tapered and / or pointed side or end.
    [042] To facilitate the description and in order not to obscure the invention, the illustrative embodiments are mainly described with reference to a motor operating at or at about 60 Hz, which theoretically corresponds to a rotation of the shaft. approximately 3,600 rpm (TPM) drive. Illustrative embodiments may therefore include a geometry based on about 3,550 RPM of energy transmitted to the well fluid during operation, which takes into account slippage and other energy losses in the rotating fluid which slow down. the rotation. However, the illustrative embodiments are not so limited and can be applied equally to PES operating anywhere between 30 Hz and 70 Hz and at the resulting rotational speed of the drive shaft and / or the fluid.
    Illustrative embodiments can reduce turbulence in a fluid flowing through the crossing of a gas separator by improving the geometry of the crossing passages. One or more of the improvements in the illustrative embodiments can increase the efficiency of the crossover as well as the overall performance of the gas separator, thereby improving the efficiency of the centrifugal pump. Illustrative embodiments can guide a lower density gas rich fluid to the tubing ring for evacuation with improved impulse and reduced likelihood of further gas trapping and resulting gas lock. Illustrative embodiments can provide a higher density gas-poor fluid to a centrifugal pump with reduced prerotation, which can improve the efficiency and overall performance of the pump. Illustrative embodiments can reduce scale blockage, erosion, and abrasive damage resulting from the higher density gas-poor fluid carrying sand in the gas separator.
    Illustrative embodiments can provide: (1) a specific angle or trajectory for a gas-poor fluid of higher density passing through the intersection of illustrative embodiments, creating less resistance and turbulence in the current, (2) communicating tangential outlet ports in the flow path of the gas-rich fluid chamber of lower crossover density, which can also generate lower resistance and turbulence, and (3) star in the crossover designed to inject an anti-rotation component into the low density gas fluid of higher density leaving the crossover, which can increase the efficiency of the downstream pump.
    Illustrative embodiments may include a plurality of teardrop-shaped channels, which channels define a first helical passage within each channel for a gas-rich fluid of lower density and a second passage helical around the outside of each channel for a gas-poor fluid of higher density. The first and second helical passages can guide the corresponding fluid streams into and out of the passages with a tangential component that provides gentle entry and exit angles for the fluid, which can reduce turbulence, new gas trapping, erosion and / or abrasive wear. The upper top surface of the channel can serve as a support wall for the higher density gas-poor fluid, which support wall can be tilted to guide the low-gas fluid gently upward at an angle of 10 to 40 ° relative to a horizontal plane, relative to the more pronounced angles of conventional crossings which are typically 45 °. An inlet of the first helical passage inside the channel, formed at the intersection between each channel and the crossing skirt, may extend along a concave top section of the skirt and may have an upper surface of 10 to 70% of that of conventional openings in comparable conventional crossing designs, which inlets can guide the gas-rich fluid with a gentle entry angle into the first helical passage. An outlet of the first helical passage may be formed at a tangential intersection between each channel and the crossing jacket, which tangential intersection may allow the passage outlet to guide the gas-rich fluid out of the first helical passage with a moderate outlet angle . Illustrative embodiments can include a modified star support fluidly coupled to the higher density gas-poor fluid exiting the second helical passages. The star support of the illustrative embodiments may include crescent-shaped fins having a concave surface which receives the incoming fluid and eliminates the rotary pulse of the low gas fluid by causing the fluid to rise upward in a more direction in addition axial. The star support fins can provide an axial pulse to the higher density gas-poor fluid, which can prevent pre-rotation in a downstream centrifugal pump. The star support of the illustrative embodiments can provide radial support to the drive shaft, which can prevent damage limiting the operation of the EPS assembly.
    Illustrative embodiments may include an artificial ascent assembly, such as a PES assembly, which may be located at the bottom of a well below the ground surface. Figure 1 shows an example of a PSE 100 assembly. The PSE 100 assembly can be positioned in well casing 105, which can separate the PSE 100 assembly from an underground formation. The well fluid can enter the casing 105 through the perforations 110 and move downstream inside the casing ring 155 to the intake ports 115. The intake ports 115 may serve as intake for the PSE 120 pump and can be located on a PSE inlet section or can be an integral part of the gas separator 125. The gas separator 125 can be a rotary or vortex separator and can be used to separate a gas from the fluid well before it enters the PSE 120 pump. A motor 130 may be a submersible electric motor which operates to rotate the PSE 120 pump and may, for example, be a three-phase squirrel cage induction motor . Sealing section 135 can be an engine guard used to equalize pressure and keep engine oil separate from the well fluid. The PSE pump 120 can be a multistage centrifugal pump and can lift the fluid to the surface 140. A production tubing 145 can transport the pumped fluid to the surface 140, then in a pipeline, a storage tank, a transport vehicle. transport and / or other means of storage, distribution or transport. In gas wells, a charge pump 150 can be used between a main pump 120 and the gas separator 125 as a lower auxiliary pump to stimulate the fluid before it enters the production pump 120.
    [047] Figure 2 shows an example of a gas separator of an illustrative embodiment. The gas separator 125 may include from upstream to downstream, an intake section 200, a separation chamber 205 and a crossing 210. Inlet ports 115 may be spaced circumferentially around the intake section. inlet 200 and serve as fluid inlet to the PSE 100 assembly. The multi-phase well fluid can enter the inlet ports 115 from the casing ring 155 and move downstream through the separation 205. While it is inside the separation chamber 205, the well fluid can be separated by rotational inertia into a gas-poor fluid of higher density and into an additional gas-rich fluid low density. The housing 225 can separate the separation chamber 205 and / or the gas separator 125 from the casing ring 155 and can serve as a support structure which transmits axial loads through the gas separator 125. The housing ports 220 can be spaced around the housing 225 and can allow the fluid rich in gas of lower density to leave the gas separator 125 and to be evacuated in the casing ring 155. A shaft 215 can be driven in rotation by a motor PSE 130 (via the intervening shaft of the sealing section 135) and extend longitudinally and centrally through the gas separator 125.
    [048] A worm 230 can be connected to the shaft of the gas separator 215 and can impart an axial pulse to the multi-phase well fluid passing through the separation chamber 205. The worm 230 can be a worm high angle fin end or similar fluid displacement member. In certain embodiments, a turbine and / or a stage can be used in place of the worm screw 230. In gas separators of the vortex 125 type, one or more vortex generators 235 can be included downstream of the worm gear 230. The vortex generator 235 can be connected to the shaft 215 and can rotate with the shaft 215. The generator 235 can communicate to the multi-phase well fluid a vortex-shaped path through the separation 205, which can separate the multi-phase fluid into the fluid poor in gas of higher density 305 and the fluid rich in gas of lower density 300 respectively by rotational inertia. In some embodiments, the gas separator 125 may be a rotary type separator and may include a rotary type generator rather than a vortex 235.
    [0491 From the separation chamber 205, the multi-phase fluid can pass at the crossing 210, where the fluid rich in gas of lower density 300 can be evacuated in the casing ring 155, while the fluid lean in gas of higher density 305 can continue to the pump 120. As shown in FIGS. 3A and 3B, due to the inertia of rotation, the stream of fluid rich in gas of lower density 300 can gravitate near l 'shaft 215, flowing inside the skirt 315 of the crossing 210. The gas-poor fluid of higher density 305 can gravitate outwards and penetrate into the space between the jacket 310 and the skirt 315.
    (0501 For purposes of illustration in Figures 3A and 3B, fluid streams 300, 305 are shown flowing in a downstream straight direction, however, due to a vortex 235 generator or generator rotating, the two currents also rotate when they flow downstream and, consequently, can adopt a helical trajectory in the form of a screw and / or in the form of a spiral through crossing 210. Such a helical trajectory can be composed of 'a downstream axial component combined with a component of rotation around a central longitudinal axis and / or a shaft 215. The component of rotation can follow a direction in the direction of the needles of a watch or in the opposite direction clockwise, as a function of the direction of rotation of the shaft 215. Examples of helically directed flow paths for a gas-poor fluid of higher density 305 and a fluid rich in gas of lower density 300, are illustrated in FIGS. 6A to 6G. In this example, the component of rotation of the two streams of helical fluid 300, 305 can be directed in the anticlockwise direction, for example by following the direction of rotation 615 anticlockwise. in Figure 6A. In addition, the speed of rotation of the fluid streams 300, 305 can be determined by the speed of rotation of the shaft 215 and / or of the PSE motor 130. The fluid streams 300, 305 in FIGS. 6A to 6D can rotate at approximately 3,550 RPM, due to the operation of the PSE 100 set at 60 Hz. However, illustrative embodiments can also be applied to a PSE set operating anywhere between 30 Hz and 70 Hz and causing the rotation of the well fluid at rotational speeds greater than or less than 3,550 RPM.
    Referring to Figures 6C and 6D, the crossover 210 of illustrative embodiments may include a plurality of teardrop-shaped channels 600 oriented to follow the helical flow paths of the fluid streams 300, 305 in order to advantageously reduce and / or prevent turbulence and / or an accumulation of gases reducing efficiency. A first helical passage 630 can extend through the interior of each channel 600 and can guide a gas-rich fluid of lower density 300 from the interior of the skirt 315 to flow through the channel 600 and s discharge into the casing ring 155. A second helical passage 620 can be formed around the outside of each channel 600, through which a gas-poor fluid of higher density 305 can be guided downstream to the inlet of the pump 120. The geometry of the channels 600 of illustrative embodiments, and therefore the geometry of the first and second helical passages 630, 620, can guide the well fluid with improved separation efficiency and reduced risk of gas again. trapped, in comparison to classic designs.
    [052] A plurality of teardrop-shaped channels 600 can extend between and through the crossing skirt 315 and the crossing jacket 310. As may be best illustrated in Figure 4 and Figure 5 , each channel 600 can be in the form of a drop of water, a sheet or a conical oval, resulting in a similar shape of the first helical passage 630 enclosed within the channel 600. The channel 600 can include a rounded side 610 opposite a pointed side 605. The rounded side 610 can extend from the skirt 315 to the shirt 310 with a rounded, curved or semi-oval shape, while the pointed side 605 can extend from skirt 315 to shirt 310 with a pointed, tapered or conical shape. The teardrop shape of each channel 600 can define an upper channel surface 635, which upper channel surface 635 forms a top support wall of each channel 600 and surrounds the top of each first helical passage 630. The surface upper part of channel 635 can extend from a pointed edge 605 to a rounded edge 610 on the top side of channel 600, the rounded edge 610 being inclined from 10 to 40 ° upward relative to the pointed edge 605. The inclined orientation of the upper surface of channel 635 can guide a gas-poor fluid of higher density 305 upward at an angle of 10 to 40 °, thereby providing a gentle entry and exit angle in the second passage. helical 620. Three channels 600 are shown in FIGS. 6A to 6D, however, more or less than three channels 600 can be used in other embodiments, for example two, four or six channels 600.
    [053] Each of the plurality of teardrop-shaped channels 600 can extend through the skirt 315 to form a channel inlet 510, which channel inlet 510 can fluidly couple the first helical passage 630 to a fluid rich in gas of lower density 300 inside the internal chamber 325 surrounded by the skirt 315. FIG. 5 shows a skirt 315 of an example of crossing 210 of illustrative embodiments. As shown in FIG. 5, the skirt 315 comprises a tubular body and a concave top part, which concave part extends inwards when the skirt 315 extends downstream. In certain embodiments, the skirt 315 can extend downwards (upstream) further than the shirt 310 so as to extend slightly above the separation chamber 205, as shown in FIG. 3B. The shaft opening 500 can extend through the top of the skirt 315, which shaft opening 500 allows the shaft 215 to extend centrally through the crossing 210.
    [054] As shown in FIG. 5, passage entries 510 can be spaced around the concave (curved) top end of the skirt 315. The intersection of the channel 600 with the skirt 315 can give each entry 510 a water drop shape reflecting that of the channel 600. As a result of the concave top end of the skirt 315, the inlets 510 can bend along the skirt 315, which can cause the orientation of the inlets 510 directed tangentially to the helical flow path of the current rich in gas of lower density 300 as shown in FIG. 6B. Positioning the inlets 510 in the curved top portion of the skirt 315 can reduce turbulence and coalescence of the bubbles. Each passage entrance 510 can have a larger surface than that of the conventional openings intended to serve a similar objective in conventional crossings, such as 10 to 70% larger.
    [055] Each of the plurality of teardrop-shaped channels 600 can extend through the jacket 310 to form an outlet 400, which outlet 400 fluidly couples the gas-rich fluid of lower density 300 to the interior of the first helical passage 630 in the casing ring 155 for evacuation. FIG. 4 represents a skirt 310 of an example of crossing 210 of illustrative embodiments. The crossing 210 may include a tubular jacket 310 circumferentially surrounding the skirt 315 with a space between them. The jacket 310 can extend axially downward from the top of the crossing 210 and / or the base of the pump 120 to above the separation chamber 205. The jacket 310 can be installed directly inside the housing 225 and can be coupled to housing 225 with a bolted, threaded, frictionally adjusted and / or similar connection so as to fix the crossing 210 inside the housing 225. As shown in FIG. 3B, each outlet 400 can be axially aligned inwardly of a corresponding housing port 220, which housing ports 220 can allow evacuation into the casing ring 155. The housing ports 220 can be shaped, sized and / or oriented in a similar fashion to those of outlet 400 to allow a continuously free flow path for a gas-rich fluid 300 during evacuation. In some embodiments, the housing ports 220 may be larger than the outlets 400 to enlarge the area exposed to a gas-rich stream of lower density 300 during evacuation.
    [056] As shown in Figure 4, the outlets 400 can be spaced around the jacket 310. Each outlet 400 can be located near the axial center point of the jacket 310, for example extending from the middle quarter or the third median of the jacket 310. In other embodiments, the outlets 400 may be above or below the center of the jacket 310 and / or may extend over longer or shorter axial distances. As the outlet 400 is formed at the intersection of the channel 600 and the jacket 310, each outlet 400 can have the shape of an inclined drop of water from the channel 600. In this way, the geometric advantages of the drop of water shapes of the channel 600 and / or of the first helical passage 630 can be kept over their entire length, going from the teardrop-shaped inlets 510 to the teardrop-shaped outlet 400.
    [057] Instead of extending from the skirt 315 and approaching the shirt 310 further (perpendicularly), each channel 600 can bend to cut the shirt 310 tangentially and form a tangential intersection 640. In with reference to FIGS. 6A and 6D, the tangential intersection 640 can be formed by a channel 600 which winds up following the tubular curve of the jacket 310 so as to approach and cross tangentially the channel 600. The tangential intersection 640 can guide the fluid rich in gas of lower density 300 out of the exit 400 with a curved trajectory similar to the curve of the channel 600, instead of a perpendicular exit path which can force sharp turns and induce a turbulence of fluid . As shown in FIG. 6A, such a curved path of the gas-rich fluid 300 can exit from the first helical passage 630 in the casing ring 155 with a gas-rich outlet angle a, which gas-rich outlet angle a is the angle at which a gas-rich fluid 300 crosses the jacket 310 when the exit at a gas-rich exit angle a can reflect the tangential direction of the tangential intersection 640 of the channel 600 and can serve as a soft exit angle for a gas-rich fluid of lower density 300, which reduces turbulence when the gas-rich fluid 300 leaves the first helical passage 630.
    [058] During operation, the inlet 510 and the outlet 400 can gently guide the gas-rich fluid of lower density 300 in and out of the first helical passage 630 with tangential direction components which induce entry angles and soft output. The curved orientation of the inlets 510 along the skirt 310, resulting from the concave top section of the skirt 310, can form a tangential component which guides a gas-rich fluid of lower density 300 in the first helical passage 630 with a soft entry angle that minimizes turbulence and flow disturbance. Likewise, the tangential intersection 640 of the channel 600 can allow the outlet 400 to guide a gas-rich fluid of lower density 300 with an outlet angle rich in gas a, which outlet angle a can prevent and / or reduce flow turbulence. The first helical passage 630 can bend between the inlet 510 and the outlet 400 and, consequently, can gently guide the gas-rich fluid of lower density 300 from the skirt 315 to the casing ring 155, this which can advantageously reduce the turbulence of the gas-rich fluid 300. By minimizing the turbulence and / or the rupture of the flow, the first helical passages 630 of the illustrative embodiments can increase the separation efficiency inside the separator gas 125 and / or reduce the probability of a new gas trapping and the resulting gas lock.
    [059] Likewise, the channels 600 can define second helical passages 620 around the channels 600, which second helical passages 620 guide a gas-poor fluid of higher density 305 around the outside of the teardrop shape. of channel 600. As for the first helical passage 630, the second helical passage 620 can be geometrically configured to tangentially guide the low-gas fluid 305 in and out of the second helical passage 620 with gentle angles which minimize fluid turbulence and / or abrasive wear inside the crossing 210. With reference to FIG. 6D, the gas-poor fluid of higher density 305 can be directed in a helix, turning around the skirt 315 while flowing downstream . Upon reaching channel 600, a gas-poor fluid of higher density 305 can be guided through the second helical passage 620, following the support wall 635 around the top of channel 600 at an angle of 10 to 40 °. Higher density gas poor fluid 305 can contact the pointed side 605, which pointed side 605 of channel 600 can gently guide the gas poor fluid 305 into the second helical passage 620 through the space above of the channel 600. The small surface of the pointed side 605 can minimize the contact area between the channels 600 and the low-gas fluid 305, thereby reducing the fluid collisions which cause turbulence and / or abrasive wear.
    As described here, the upper surface of the channel 635 can tilt upward by 10 to 40 ° when the support wall 635 extends from the pointed side 605 to the rounded edge 610 on the top side of the channel. 600. In addition, the upper surface of the channel 635 can bend around the skirt 315, following the curved shape of the concave surface of the skirt 315. During operation, a gas-poor fluid of higher density 305 can be guided upward at an angle of 10 to 40 ° while naturally bending around the skirt 315, as shown in Figures 6C and 6D. The leaner gas of higher density 305 can follow the upper surface of the channel 635 and / or the second helical passage 620 upwards and around the skirt 315, at which time a lean gas 305 can exit the second helical passage 620 through the space above the rounded side 610. By simultaneously tilting upwards and turning around the skirt 315 in a helical manner, the second helical passage 620 can be oriented with a tangential component which reflects the path natural flow of the gas-poor fluid of higher density 305 induced during centrifugal separation. In this way, a gas lean fluid of higher density 305 can be guided through a second helical passage 620 with soft inlet and outlet angles which reduce the disturbance of the flow of the gas lean fluid 305, reducing and / or thus preventing turbulence and abrasive wear.
    The helical trajectory of the fluid leaner in gas of higher density 305, although beneficial for the separation, may include a prerotation component which, if it is maintained when it is sent to the pump 120, can degrading the efficiency and production rate of pump 120. Illustrative embodiments may include an improved star support 700, which star support 700 serves to reduce and / or prevent pre-rotation of the fluid while providing a radial support to the shaft 215.
    [062J The position of the shirt 310 relative to the skirt 315 can be adjusted. The jacket 310 can be turned around the skirt 315 to control the volume of the fluids through the outlets 400. In certain applications, the flow rate of the pump 120 can cause fluids to enter the separator 125 through the outlets 400. In this regard, the ability to adjust the liner 310 to control the volume of fluid through the outlets 400 can improve the overall functionality of the crossover 210. The design also lends itself to be flow control in applications where the capacity of displacement of fluid from the separator 125 is much greater than the pump requirement and therefore open for a greater flow leaving the separator 125 before reaching the pump 120. FIGS. 6E to 6G illustrate the jacket 310 in a first position , Figure 6E, to allow maximum flow through the outlets 400, in a second position, Figure 6F, to allow partial flow through the outlets 400, and in a third position, FIG. 3G, to allow minimum flow through the outlets 400. The jacket 310 of the crossing 210 can be made from a proven bonded material such as stainless steel, which has the strength to withstand the difficult operating conditions of downholes.
    Referring to Figures 3B and 5, an axial tube 505 may extend downstream of the skirt 315 and may enclose the shaft 215. One or more spacer sleeves 515 may be stacked around the shaft 215 and separate the axial tube 505 from the shaft 215. Several spacer sleeves 515 can be stacked around the shaft 215 and can provide radial support for the shaft 215. The star support 700 of the illustrative embodiments may be included inside the jacket 310 downstream of the passage outlet 400 and / or of the skirt
    315. An example of a star support 700 is shown in FIGS. 7A to 7C. The star support 700 can include a support hub 705, which hub 705 can be fitted around one or more spacer sleeves 515 above the axial tube 505. In some embodiments, the support hub 705 can be integrated into the axial tube 505 or can be stacked coaxially above the axial tube 505 in other embodiments. In some embodiments, a socket 330 may be included between the spacer sleeve 515 and the star support hub 705, as shown in Figures 3B and 7C. In one example, the sleeve 330 can be pressed and held static between the spacer sleeve 515 and the support hub 705. The spacer sleeve 515 can be coupled to the shaft 215 so as to rotate with the shaft 215 , which can provide radial support and wear protection.
    [064] During operation, a fluid poor in gas of higher density 305 leaving the second helical passage 620 can be directed downstream through a flow chute 625. With reference to Figures 6B and 6D, the flow chute 625 can extend upwards above the skirt 315. The chute 625 can have the shape of an inverted funnel, inclined inward and / or narrowed when the chute 625 extends downstream. The chute 625 can define a space for the fluid to flow around the axial tube 505. The flow chute 625 can receive the gas-poor fluid of higher density 305 leaving the second helical passage 620 and direct the fluid towards the inside towards the axial tube 505. The gas-poor fluid of higher density 305 can descend downstream to the star support 700 through the flow chute 625, for example shown in FIG. 6D.
    [065] The star support 700 can receive the fluid lean in gas of higher density 305 in rotation coming from the second helical passage 620 and eliminate the impulse of rotation of the fluid lean in gas of higher density. The gas-poor fluid of higher density can be redirected with an axial component which prevents and / or reduces the prerotation of the gas-poor fluid 305 when the fluid enters the pump 120. With reference to FIGS. 7A to 7C, the support in star 700 may include a plurality of star fins 710 extending radially from the support hub 705 toward the liner 310. In some embodiments, star fins 710 may come into contact with the inner diameter of the liner 310 in order to maintain radial resistance and / or provide radial support to the shaft 215. Three star fins 710 are shown in Figures 7A to 7C, however, two, five or six star fins 710 can be used in d other embodiments. Each 710 star support fin can have the shape of a crescent or a similar shape to the bottom half of a "C" cut horizontally. The upper part of the fins 710 can extend vertically or substantially vertically along the outside diameter of the hub 705. The lower part of the fins 710 can bend towards the horizontal to form a ramp which curves from almost horizontal to vertical when the fin 710 extends from the bottom to the top.
    [066] The fins 710 of the star support 700 may be curved with a concave surface which receives a gas-poor fluid, of higher density 305 entering, which helical trajectory of the fluid current 305 may comprise a component of rotation directed in the counterclockwise, for example in the direction of rotation 615 counterclockwise in Figure 6B. As a result, the higher density gas lean fluid 305 flowing to the star support 700 may come into contact with the curved face 715 of the support fin 710. The higher density gas lean fluid stream 305 can be constrained upwards, according to the increasingly straightened shape of the fin 710. In this way, the star support 700 can convert the rotation pulse into an axial pulse reducing and / or thus preventing the pre rotation of the fluid entering the pump 120 and increasing the efficiency and performance of the pump 120. In addition, the star support 700 can provide radial resistance during operation, thus preventing any damage limiting the operation of the assembly. of PSE 100.
    [067] Illustrative embodiments can reduce turbulence in a fluid flowing through the crossing of a gas separator by improving the geometry of the crossing passages. Illustrative embodiments may include a plurality of channels defining first helical passages within the channels for low density gas rich fluid and second helical passages around the exterior of the channels for low gas fluid higher density. The first and second helical passages can guide the corresponding fluid streams into and out of the passages with a tangential component that provides gentle entry and exit angles for the fluid, which can reduce turbulence, new gas trapping, erosion and / or abrasive wear. Illustrative embodiments can guide lower density gas rich fluid through the first helical passages to the casing ring for evacuation with improved impulse and reduced likelihood of further gas trapping and resulting gas lock . Illustrative embodiments can provide a higher density gas-poor fluid through the second helical passages to a centrifugal pump with reduced pre-rotation, thereby improving the efficiency and overall performance of the pump. Illustrative embodiments can reduce scale blockage, erosion, and abrasive damage resulting from the higher density gas-poor fluid carrying sand in the gas separator. Examples of embodiments may include a star support carrying modified fins which eliminate the impulse of rotation of the gas-poor fluid of higher density, which can reduce the pre-rotation in the centrifugal pump. Illustrative embodiments can improve crossover efficiency and improve the overall performance of the gas separator and the centrifugal pump.
    [068] Other modifications and variant embodiments of various aspects of the invention may be apparent to a person skilled in the art in the light of the present description. Consequently, this description should be interpreted as illustrative only and is intended to teach the skilled person the general manner of carrying out the invention. It should be understood that the forms of the invention presented and described here should be considered as the currently preferred embodiments. Elements and materials can replace those illustrated and described herein, parts and methods can be reversed and certain features of the invention can be used independently, as would be apparent to those skilled in the art after benefiting from the 15 present description of the invention. Modifications can be made to the elements described here without departing from the scope and range of equivalents described in the following claims. In addition, it should be understood that the features described herein independently may, in some embodiments, be combined.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Crossing of a gas separator for an electric submersible pump (EPS) comprising: a teardrop-shaped channel extending in a helix between and through:
    a crossing skirt at a channel entrance, the crossing skirt inside a crossing shirt;
    the crossing jacket at the outlet of the canal, an outlet from the canal above the entrance to the canal; and the drop shape of the canal having:
    a rounded side opposite a pointed side and a channel top surface extending therebetween, wherein the channel top surface extends between ten degrees and forty degrees upward from the pointed side; and the channel defining:
    a first helical passage inside the channel for a fluid rich in gas of lower density flowing inside the passage, in which the first helical passage tangentially cuts the crossing jacket; and a second helical passage around the channel for a gas-poor fluid of higher density flowing outside the passages; and a star support fluidly coupled to the gas-poor fluid of higher density downstream of the second helical passage, the star support comprising:
    a plurality of crescent-shaped star fins extending radially outward from a star-shaped support hub, the crescent-shaped star fins having a concave surface which receives a gas-poor fluid of higher density entering.
    [2" id="c-fr-0002]
    2. Crossing of a gas separator for EPS according to claim 1, in which the crossing jacket is fixed inside a gas separator box downstream from one of a rotary or vortex generator. .
    [3" id="c-fr-0003]
    The crossing of a PSE gas separator according to claim 1, wherein the channel outlet is aligned with a housing port through the gas separator housing such that the channel outlet is fluidly coupled to a casing ring.
    [4" id="c-fr-0004]
    4. Crossing of a gas separator for PSE according to claim 1, in which the channel inlet is positioned on a concave top part of the crossing skirt; and, optionally, the position of the channel inlet on the concave top portion of the crossing skirt bends the channel inlet to align tangentially with the curvature of the gas-dense fluid of lower density entering the entrance to the canal.
    [5" id="c-fr-0005]
    The crossover of a PSE gas separator according to claim 1, wherein each channel inlet is 10 to 70% larger than conventional inlet ports in comparable conventional gas separator designs; and / or an upper surface of a top wall of the channel extends from ten to forty degrees relative to the horizontal and guides a gas-poor fluid of higher density on the same path.
    [6" id="c-fr-0006]
    6. Crossing of a gas separator for EPS according to claim 1, in which each channel curves when the channel extends upwards from the crossing skirt to the crossing jacket; and / or the tangential intersection guides the fluid out of the crossing outlet tangentially to an internal wall of the crossing jacket; and / or the crossing shirt can rotate around the crossing skirt.
    [7" id="c-fr-0007]
    7. Crossing of a gas separator for PSE according to claim 1, in which the star support confers an axial moment on the fluid lean in gas of higher density exiting flowing around the passages; and / or the star support provides radial support to a shaft extending centrally through the crossing.
    [8" id="c-fr-0008]
    8. Crossing of a gas separator for PSE according to claim 1, in which the gas-rich fluid of higher density is supplied to a centrifugal pump with a lower FVG and a reduced pre-rotation.
    [9" id="c-fr-0009]
    9. Crossing of a gas separator for an electric submersible pump (EPS) comprising:
    a first helical path which guides a lean gas of higher density at an angle of 10 to 40 degrees with respect to a horizontal plane, when the lean gas of higher density moves through the crossing, the first path helically fluidly coupled to a star support comprising crescent-shaped fins which eliminate the moment of rotation of the leaner gas of higher density when the lean fluid of higher density leaves the crossing; and a second helical path which guides a gas-rich fluid of lower density tangentially through the exit ports of the crossing which discharges towards a casing ring; and the first helical path and the second helical path defined by a channel having teardrop openings in a crossing jacket which define the outlet ports and the teardrop openings in the crossing skirt which define an entry into the channel, where the first helical path is around the channel and the second helical path passes through an interior of the channel.
    [10" id="c-fr-0010]
    10. Crossing of a gas separator for EPS according to claim 15, in which the teardrop-shaped openings in the crossing skirt are positioned on a concave top part of the skirt; and possibly the curved orientation of the teardrop-shaped openings extending around the concave top portion of the skirt supplies the gas-rich fluid of lower density to a tangential entry of the helical passage of gas-poor fluid .
    [11" id="c-fr-0011]
    The crossing of a PSE gas separator according to claim 15, wherein each teardrop-shaped opening on the crossing skirt has a surface area of 10 to 70% larger than the conventional crossing skirt openings. .
    [12" id="c-fr-0012]
    12. The intersection of a gas separator for EPS according to claim 15, in which a top surface of the channel extends upwards from ten to forty degrees relative to the horizontal and guides the fluid lean in density gas. higher up on the same path.
    [13" id="c-fr-0013]
    13. Crossing of a gas separator for EPS according to claim 15, in which the star support imparts an axial moment to the gas-poor fluid of higher density circulating around the passages and continuing beyond the star support; and / or the star support provides radial support to a drive shaft extending through the crossing.
    [14" id="c-fr-0014]
    14. Crossing of a gas separator for EPS according to claim 15, comprising a plurality of channels.
    [15" id="c-fr-0015]
    15. A method of separating a fluid lean in gas of higher density from a fluid rich in gas of lower density in a gas separator which functions to separate the multi-phase fluid by rotational inertia comprising:
    maintaining a helical trajectory of the gas-dense fluid of lower density by sending the gas-rich fluid of lower density through the interior of a teardrop-shaped channel extending in a helix which discharges evacuation to a casing ring;
    maintaining a helical trajectory of the lean gas with higher density by sending the lean gas with higher density around the helical channel; and eliminating the torque of the leaner gas of higher density after the lean fluid of higher density passes around the helical channel, guiding the lean fluid of higher density through a support a star having crescent-shaped fins and a concave surface which curves in a direction opposite to the direction of rotation of the lean gas with higher density;
    and, optionally supplying the gas-poor fluid of higher density to a pump inlet with a lower torque and FVG than that of the fluid entering the gas separator.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3070447A1|2019-03-01|CROSSING SYSTEM AND APPARATUS FOR ELECTRIC SUBMERSIBLE GAS SEPARATOR
    CA2204664C|2007-01-16|System for compressing a fluid in several phases with a centrifugal pump
    EP0532397B1|1995-12-13|Continuous mixing device, process and use in a pumping plant for high viscosity fluid
    FR2635147A1|1990-02-09|CENTRIFUGAL PUMP COMPRISING AN IMPROVED PRESSURE BALANCING DEVICE
    WO1989009342A1|1989-10-05|Rotary machine with non-positive displacement, for use as a pump, compressor, propulsion unit, generator or drive turbine
    CA2801221C|2018-09-04|Compressor and turbomachine with optimized efficiency
    EP2430314B1|2019-07-24|Double exhaust centrifugal pump
    US8747078B2|2014-06-10|Gas separator with improved flow path efficiency
    CA2982325A1|2017-12-15|Cardiac pump equipped with a turbine with internal blades
    CH705213B1|2013-01-15|Pump comprising an axial balancing system.
    EP3011185A1|2016-04-27|Centrifugal rotor
    EP2809416B1|2019-08-28|Device for separating two immiscible fluids of different densities by centrifugation
    EP3507498A1|2019-07-10|Turbopump inducer and turbopump
    FR3058478A1|2018-05-11|SUBMERSIBLE ELECTRIC PUMP ANTI-GAS CAP
    EP3517731B1|2021-03-10|Arrangement comprising an annular passage between a stator and a rotor platform of a turbomachine and corresponding method of compressor stability control
    CA2982139C|2018-09-18|Turbine with internal blades
    FR3081352A1|2019-11-29|ROTODYNAMIC SEPARATOR FOR MULTIPHASIC FLUID WITHOUT CENTRAL HUB
    FR3042099B1|2019-07-12|IMPROVED INDIVIDUALIZATION SYSTEM FOR CHERRIES
    FR3002600A1|2014-08-29|HYDRAULIC PUMP WITH REDUCED SIZE, PREFERABLY FOR AQUATIC ACTIVITIES
    FR2601084A1|1988-01-08|CENTRIFUGAL PUMP FOR DELIVERY OF GAS-CONTAINING FLUIDS
    FR2697870A1|1994-05-13|Low output axial pump for two-phase mixt. - esp. for pumping oil and gas mixt. from oil well
    FR3001897A1|2014-08-15|Respiratory assistance apparatus, has diffuser having shape of bent pipe is arranged with set of sections, and set of centers of various sections of diffuser is aligned on three-dimensional helicoid curve
    WO2020207834A1|2020-10-15|Output pivot for a magnetic coupling cardiac pump
    FR2748532A1|1997-11-14|Multi=stage and centrifugal pumping system for oil wells
    CA3068208A1|2020-04-01|Cardiac pump with magnetic coupling and inverse flow
    同族专利:
    公开号 | 公开日
    AR112879A1|2019-12-26|
    CA3065581A1|2019-03-07|
    BR112019024920A2|2020-06-23|
    CO2020001026A2|2020-02-07|
    CN110662881A|2020-01-07|
    WO2019045979A1|2019-03-07|
    US10858925B2|2020-12-08|
    US20190249537A1|2019-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL1018438C1|2001-07-02|2003-01-08|Baat Medical Engineering B V|Foldable and foldable tools for placement in a spine.|
    US7377313B2|2004-06-22|2008-05-27|Baker Hughes Incorporated|Gas separator fluid crossover for well pump|
    US7445429B2|2005-04-14|2008-11-04|Baker Hughes Incorporated|Crossover two-phase flow pump|
    US7461692B1|2005-12-15|2008-12-09|Wood Group Esp, Inc.|Multi-stage gas separator|
    EP1974790A1|2007-03-26|2008-10-01|Twister B.V.|Cyclonic fluid separator|
    US8397811B2|2010-01-06|2013-03-19|Baker Hughes Incorporated|Gas boost pump and crossover in inverted shroud|
    US8747078B2|2011-08-08|2014-06-10|Baker Hughes Incorporated|Gas separator with improved flow path efficiency|
    US9283497B2|2013-02-01|2016-03-15|Ge Oil & Gas Esp, Inc.|Abrasion resistant gas separator|
    US9574562B2|2013-08-07|2017-02-21|General Electric Company|System and apparatus for pumping a multiphase fluid|US10808516B2|2017-08-30|2020-10-20|Halliburton Energy Services, Inc.|Crossover system and apparatus for an electric submersible gas separator|
    US11162494B2|2019-01-23|2021-11-02|Pratt & Whitney Canada Corp.|Scavenge pump|
    US20210301636A1|2020-03-30|2021-09-30|Baker Hughes Oilfield Operations Llc|Charging pump for electrical submersible pump gas separator|
    法律状态:
    2019-08-30| PLFP| Fee payment|Year of fee payment: 2 |
    2020-08-21| PLFP| Fee payment|Year of fee payment: 3 |
    2021-04-16| PLSC| Search report ready|Effective date: 20210416 |
    2021-08-19| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201762551850P| true| 2017-08-30|2017-08-30|
    US62551850|2017-08-30|
    [返回顶部]