• 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:
    hydraulic control system for controlling the operation of a downhole valve, and, method for operating a downhole valve, method and systems for opening and closing a subsurface valve are disclosed. a piston rod forms a first piston chamber, a second piston chamber and a third piston chamber within a housing. the first piston chamber is fluidly coupled to a high pressure piping and the second piston chamber is fluidly coupled to a surface control line and a first compartment of a storage chamber. the third piston chamber is fluidly coupled to a second compartment of the storage chamber. a flow tube couples the stem piston to a pendant tab. the piston rod is moved between a first position and a second position in response to a change in pressure in at least one of the first piston chamber, the second piston chamber and the third piston chamber. the movement of the piston rod between the first position and the second position is at least one of opening and closing the pendant tab.
    公开号:BR112015025866B1
    申请号:R112015025866-2
    申请日:2013-05-21
    公开日:2021-08-03
    发明作者:James Dan Vick；Jimmie Robert Williamson；Jeremy Pike Brimer
    申请人:Halliburton Energy Services, Inc.；
    IPC主号:
    专利说明:

    Fundamentals
    [001] The present invention relates to underground operations and, more particularly, to a method and system for opening and closing a subsurface valve used in conjunction with these operations.
    [002] Hydrocarbons, such as oil and gas, are commonly obtained from underground formations that may be located on land or at sea. The development of underground operations and the processes involved in removing hydrocarbons from an underground formation is complex. Typically, underground operations involve a number of different steps such as, for example, drilling a well hole at a desired well location, treating the well hole to optimize hydrocarbon production, and performing the steps necessary to produce and process the hydrocarbons from the underground formation.
    [003] When performing underground operations it may be desirable to close a well in the event of an uncontrolled condition that could damage property, injure personnel or cause pollution. One of the mechanisms used to close a well is a Surface Controlled Subsurface Safety Valve ("SCSSV"). An SCSSV typically includes a hanging tab. The pendant flap is a closure element that can be pivotally mounted so that it is rotatable between a first "open" position and a second "closed" position. When in the closed position, the overhanging tab can substantially close the well. In certain implementations, a flow tube can be actuated downward against the pendant tab to rotate it to the open position. The flow tube can be actuated using a hydraulic control system. A closing spring can be mounted on the hinge rod of the pendant tab. The closing spring can be biased so as to move the pendant tab back to its closed position once the actuation pressure applied to the flow tube is reduced below a preset value.
    [004] The hydraulic control system used to actuate the flowtube can use a series of seals. Degradation of these seals can lead to SCSSV failure, exposing the system to pipeline pressure. It is, therefore, desirable to develop a hydraulic control system that retains the ability to close the overhanging flap even if one or more of the SCSSV seals are degraded. Brief Description of Drawings
    [005] Figure 1A shows a schematic of a cross-sectional view of an SCSSV according to an illustrative embodiment of the present disclosure; Figure 1B shows a schematic cross-sectional view of an SCSSV in accordance with another illustrative embodiment of the present disclosure; Figure 1C shows a schematic cross-sectional view of an SCSSV in accordance with another illustrative embodiment of the present disclosure; and Figures 2A and 2B show a hanging tab that may be used in an SCSSV in accordance with an illustrative embodiment of the present disclosure.
    [006] While embodiments of this disclosure have been depicted and described and are defined by reference to examples of the disclosure, such references do not imply a limitation on the disclosure, and no such limitation will be inferred. The disclosed subject matter is capable of considerable modifications, alterations, and equivalents in form and function, as will occur to individuals skilled in the relevant art and having the benefit of this disclosure. The modalities described and represented in this disclosure are just examples and are not exhaustive of the scope of the disclosure. Detailed Description
    [007] The terms "couple" or "couple" as used herein are intended to mean either an indirect or a direct connection. Thus, if a first device couples to a second device, this connection can be through a direct connection or through an indirect mechanical connection via other devices and connections. Likewise, a first component is "fluidly coupled" to a second component if there is a path for fluid flow between the two components. The terms "above" or "above hole" as used herein mean along the drill string or distal end hole towards the surface and "below" or "below hole" as used herein means along the drill string or hole from the surface towards the distal end. Furthermore, the terms "above", "bore above", "below" and "bore below" are only used to denote the relative location of different components and are not intended to limit the present disclosure to only one vertical well. Specifically, the present disclosure is applicable to horizontal, vertical, diverted or any other type of well.
    [008] It will be understood that the term "well" is not intended to limit the use of the equipment and processes described herein to the development of an oil well. The term also covers the development of natural gas wells or hydrocarbon wells in general. In addition, such wells can be used for production, monitoring or injection in relation to the recovery of hydrocarbons or other materials from the subsurface.
    [009] Turning now to Figure 1A, a cross-sectional view of an SCSSV according to an illustrative embodiment of the present disclosure is generally indicated with reference numeral 100. SCSSV 100 includes a hydraulically operated piston that includes a piston of rod 102 disposed within a housing 104. For illustrative purposes, the rod piston 102 of Figure 1A may have a first distal end 102A, a middle portion 102B, and a second distal end 102C. The term "middle portion", as used herein, refers to any portion of the piston rod 102 that lies between its two distal ends.
    [0010] A single control line 106 can provide pressure to the piston rod 102 from the surface or any other location. The illustrative embodiment of Figure 1A represents only one of the hydraulically operated pistons of an SCSSV 100. However, as would be appreciated by those skilled in the art having the benefit of the present disclosure, additional hydraulically operated pistons can be added to the SCSSV 100 by directing pressure from the single control line 106 through one or more external control lines. For example, when using an SCSSV having a smaller outside diameter ("OD"), two or more pistons can be used to minimize the OD of the entire assembly.
    [0011] As shown in Figure 1A, the piston rod 102 may have a first diameter seal (D1) at a middle portion 102B thereof and a second diameter seal (D2) at its two distal ends 102A, 102C. In the illustrative embodiment of Figure 1A, the first seal diameter D1 at the middle portion 102B of the piston rod 102 is larger than the second seal diameter D2 at its distal ends 102A, 102C. However, in certain embodiments, the first seal diameter D1 may be smaller than the second seal diameter D2 without departing from the scope of the present disclosure.
    [0012] A first seal 108, a second seal 110 and a third seal 112 can be used to seal the piston rod 102 in the housing 104. Specifically, the seals 108, 110, 112 can seal the first distal end 102A, the portion middle 102B and the second distal end 102C of the rod piston 102, respectively. As those skilled in the art will appreciate with the benefit of this disclosure, in certain illustrative embodiments, each of the seals 108, 110, 112 may, in fact, be comprised of a seal stack having two or more different seal components. Furthermore, although all three seals 108, 110, 112 are represented as O-rings for simplicity, other seals may be used without departing from the scope of the present disclosure.
    [0013] In certain implementations, seals 108, 110, 112 may be stacks of non-elastomeric seals. Additionally, seals 108, 110, 112 may have metal-to-metal seals above and below stops. The structure and operation of such above and below stops are well known to those skilled in the art and therefore will not be discussed in detail here. Specifically, the stop above is a metal protrusion that creates a metal-to-metal seal at the conical piercing angle of the piston hole only when the SCSSV is in the closed position. This metal-to-metal seal is used to add an additional sealing element to the seal stack for added security against fluid leakage. In contrast, the stop below the metal-to-metal seal makes contact and seals only when the SCSSV is in the open position. In certain applications, there is likely to be significant differential pressure across seals 108, 110, 112. As a result, it is important that seals 108, 110, 112 provide a more effective seal than may be necessary in applications involving a lower pressure differential. In certain implementations, seals 108, 110, 112 may be comprised of metal-to-metal seals with elastomeric secondary seals.
    [0014] The seal diameter D2 at the distal ends 102A, 102C of the piston rod 102 can be used to pressure balance the piston rod 102 to piping pressure. Specifically, pressure from the tubing is applied to the first distal end 102A of the piston rod 102 through the high pressure branch of the tubing 114. The high pressure leg of the tubing 114 directs this pressure to a first piston chamber 116. The first chamber of piston 116 is a chamber that is formed in housing 104 between the first seal 108 at the first distal end 102A of the piston rod 102 and a wall of the housing 104. The dynamic sealing surfaces of the two distal ends 102a, 102C of the piston rod 102 are designed to be of substantially equal diameters so that the piston rod 102 is pressure-balanced to the pipeline pressure. In deeper wells or wells having higher pressures, the pipe pressure balance can be of particular importance as the required holding pressure can be dramatically lower than that of conventional wells.
    [0015] In the illustrative embodiment of Figure 1A, a hydraulic control pressure provided by the single control line 106 is denoted as P1. The term "hydraulic control pressure", as used herein, refers to an amount of pressure that is selected and provided to a user/operator from the surface or subsurface wellhead. The single control line 106 may be directed to a branch of the second piston chamber 118 and a branch of the first storage chamber 120. The branch of the second piston chamber 118 directs hydraulic control pressure (P1) to a second chamber of piston 122 formed in housing 104 between first seal 108 and second seal 110 on a first side of middle portion 102B of piston rod 102. The pressure in second piston chamber 122 and third piston chamber 126 is referred to herein as (P1 ) and (P2), respectively. The branch of the first storage chamber 120 directs hydraulic control pressure (P1) to a first compartment of a storage chamber 124. Therefore, the branch of the first storage chamber 120 fluidly couples the first compartment of the storage chamber 124 and the second piston chamber 122 so that they are held at substantially the same pressure.
    [0016] A second compartment of the storage chamber 124 is pressurized to a second pressure (P2). This second pressure (P2) is directed to a third piston chamber 126 through a branch of the second storage chamber 128. Therefore, the branch of the second storage chamber 128 fluidly couples the second compartment of the storage chamber 124 and the third piston chamber 126 so that they are held at the same pressure. Third piston chamber 126 is formed in housing 104 between second seal 110 and third seal 112 on a second side of middle portion 102B of piston rod 102, bore below second piston chamber 122. As shown in Figure 1A, the volume of the first piston chamber 116 and the volume of the third piston chamber 126 vary inversely to each other as the piston rod 102 is moved from one position to another in the housing 104. A rupture disk 130 separates the first compartment and the second compartment of the storage chamber 124.
    [0017] A compressible fluid can be used to maintain the second pressure (P2) in the second compartment of the storage chamber 124 and the pressure of the third piston chamber 126 at a desired value. In certain implementations, the compressible fluid may be vacuum or air at low pressure which may be near atmospheric pressure. The volume of the storage chamber 124 is designed so that the movement of the piston rod 102 does not significantly increase the pressure (P2) in the second compartment of the storage chamber 124. According to certain illustrative embodiments (not shown), the second compartment of the storage chamber 124 can be contained in a control line that can extend to the surface, almost to the surface or to the wellhead. In such embodiments, the control line can be filled with a light compressible fluid or gas.
    [0018] Additionally, one or more filters 132 can be used to prevent dirty pipe fluid from affecting the life of the seal 108 or filling the first piston chamber 116 with debris or other unwanted materials. Furthermore, in certain implementations, a wiper seal (not shown) may be used to prevent dirty piping fluid from reaching the seals 122. A flow tube 134 is coupled to the second distal end 102C of the rod piston 102. In certain implementations , the flow tube 134 can be coupled to the piston rod 102 through a connecting piece 137.
    [0019] Therefore, in operation, when pressure (P1) is applied to the piston rod 102 from the single control line 106 the piston rod 102 is moved down the hole (to the right in Figure 1A) and applies a downward pressure to the outflow tube 134. Applying this downward pressure moves the outflow tube 134 downward and compresses a closing spring 136. The downward movement of the outflow tube 134 also exerts pressure on the pendant tab 138 and moves the pendant flap 138 to the open position. Therefore, movement of piston rod 102 between a first position and a second position can be used to open and close pendant flap 138 using flow tube 134 which couples piston rod 102 to pendant flap 138. However, the closing spring 136 is biased to return the pendant tab 138 to its closed position once the pressure (P1) is reduced below a certain threshold value. In addition, in certain implementations, another spring 140 may be provided at an interface of the flow tube 134 and the stem piston 102. The spring 140 can be used to transmit force from the stem piston 102 to the flow tube 134. Therefore, movement of the piston rod 102 between a first position and a second position, in response to changes in the pressure of the three piston chambers 116, 122, 126, moves the outflow tube 134 which, in turn, opens and closes hanging flap 138.
    [0020] When pendant tab 138 is in the closed position, it may rest against a seat that surrounds a passage (not shown) in a valve housing (not shown). As will be appreciated by those skilled in the art, with the benefit of the present disclosure, this passage can be isolated from the pressure in the single control line 106, but it can be exposed to the pressure of the internal piping.
    [0021] Turning now to Figure 1B, a cross-sectional view of an SCSSV according to an illustrative embodiment of the present disclosure is generally indicated with reference numeral 100'. In this mode, the storage chamber 124 and the branch of the first storage chamber 120 are eliminated and the branch of the second storage chamber 128 passes to the surface and becomes a balanced line having pressure P2. Therefore, the branch of the second storage chamber 128 in Figure 1A is replaced by a balanced line 28' in Figure 1B. As storage chamber 124 is removed, any concerns associated with leaks from storage chamber 124 are eliminated. The remaining portions of the SCSSV 100' remain the same as those of the SCSSV 100 discussed in conjunction with Figure 1A above.
    [0022] On the SCSSV 100', under normal operating conditions, when the pressure (P1) of the single control line 106 falls below a certain threshold value, the pressure of the closing spring 136 exceeds the pressure applied by the piston rod 102 to the outflow tube 134 and the pendant flap 138 is closed by the closing spring 136. The control line 106 and the balanced line 128' both pass to the surface and can be adjusted therefrom. Therefore, if the seal 110 fails, the pressure on the first side of the middle portion 102B of the piston rod 102 (i.e., P1) will be the same as the pressure on the second side of the middle portion 102B of the piston rod (i.e., P2) and the pressure applied by the pressure-balanced piston is overcome by the compressed closing spring 136, thereby closing the pendant flap 138.
    [0023] Likewise, if the seal 108 fails, the pressure in the second piston chamber 122 is lost. As a result, the pressure differential between the third piston chamber 126 and the second chamber 122 together with the pressure of the spring 136 moves the piston rod 102 and the flow tube 134 above the bore and closes the pendant flap 138 (proof mode failure). Finally, if the seal 112 fails, the single control line 106 continues to supply fluid/pressure to the first piston chamber 122. If the pressure in the particular section of the wellbore where the SCSSV 100' is located is higher than single control line pressure 106, then pendant flap 138 will close. In certain implementations, methods and systems disclosed herein may be implemented in a subsea environment. In such applications, the 128' balance line can be vented out to sea. Therefore, if the pressure in the particular section of the wellbore where the SCSSV 100' is located is higher than the balance line pressure 128', the vent line will close and the piston rod 102 will no longer be balanced . As a result, the pendant flap 138 goes to the closed position when the pressure of the single control line 106 is reduced.
    [0024] Figure 1C represents an SCSSV according to yet another illustrative embodiment of the present disclosure generally denoted with the reference numeral 100''. In this embodiment, the storage chamber 124 and the branch of the first storage chamber 120 of Figure 1A are eliminated and the branch of the second storage chamber 128 is directed to a self-loading chamber 300. storage 128 of Figure 1A is replaced by a self-loading chamber line 128'' in Figure 1C. As storage chamber 124 is removed, any concerns associated with leaks from storage chamber 124 are eliminated. The remaining portions of the SCSSV 100' remain the same as those of the SCSSV 100 discussed in conjunction with Figure 1A above.
    [0025] The self-loading chamber 300 can contain two internal fluids. The first is a high pressure gas 302 and the second is a liquid barrier 304. In certain embodiments, the high pressure gas 302 corresponds to the high pressure of the annulus and the liquid barrier 304 is the fluid of the annulus. The term "annulus fluid" as used herein refers to fluids that may be flowing through an annular between the SCSSV 100'' and a wellbore wall or a wellbore casing (not shown). Specifically, when the self-loading chamber 300 is first directed down the hole, it is at ambient pressure. Once at the bottom of the well, the self-loading chamber 300 can be "loaded" using the pressure of the annulus. Specifically, once at a desired location at the bottom of the well, fluid can flow from the annulus to the self-loading chamber 300 through an annular pressure inlet 306 and a one-way check valve 308.
    [0026] When fluid from the annulus flows into the self-loading chamber 300, the ambient pressure therein is compressed by the fluid from the annulus. Annular fluid will continue to flow into the self-loading chamber 300 until the pressure of the gas portion and that of the annular fluid are the same. Specifically, fluid from the annulus continues to flow into self-loading chamber 300 until high pressure gas 302 and liquid barrier 304 are at the same pressure. In certain embodiments, a check valve 308 is provided to regulate fluid flow to the self-load chamber 300. At this point, the check valve 308 closes and the self-charge chamber 300 has been charged. As a one-way check valve 308 is used, any reduction in annular pressure will have no impact on the pressure stored in the self-load chamber 300.
    [0027] On the SCSSV 100'', under normal operating conditions, when the pressure (P1) of the single control line 106 falls below a certain threshold value, the pressure of the closing spring 136 exceeds the pressure applied by the piston. stem 102 to flowtube 134 and pendant tab 138 is closed by closing spring 136. If seal 110 fails, the pressure on the first side of middle portion 102B of stem piston 102 (i.e., P1) will be the applied pressure. by single control line 106. In contrast, the pressure applied to the second side of the middle portion 102B of the piston rod is the annular high pressure applied through the self-loading chamber line 128'' of the self-loading chamber 300. the line pressure of the self-loading chamber 128'' is equal to or higher than the pressure of the single control line 106, the pressure applied by the pressure-balanced rod piston 102 together with the pressure provided by the compressed closing spring 136 closes the hanging flap 138.
    [0028] Likewise, if the seal 108 fails, the pressure in the second piston chamber 122 is lost. As a result, the pressure differential between the third piston chamber 126 and the second chamber 122 together with the pressure of the spring 136 closes the pendant flap 138 (fail-safe mode). Finally, if seal 112 fails, single control line 106 continues to supply fluid/pressure to the first piston chamber 122. If the pressure in the particular section of the wellbore where the SCSSV 100'' is located is higher than the single control line pressure 106, then the pendant flap 138 will close.
    [0029] Finally, if the seal 112 fails, high pressure from the pipeline enters the third piston chamber 126 which is in fluid communication with the self-loading chamber 300 through the self-loading chamber line 128''. At this point, both the second piston chamber 122 and the third piston chamber 126 will be at high piping pressure and P1 and P2 will become the same. Therefore, the pressure applied by the pressure-balanced piston is overcome by the compressed closing spring 136, thereby closing the pendant flap 138.
    [0030] In certain implementations, it may be desirable to clean and/or filter the annular fluid before it is directed to the self-loading chamber 300. In such embodiments, a filter can be used to clean the fluid. Furthermore, in certain embodiments, a clean fluid chamber (not shown) may be placed between the self-loading chamber 300 and the self-loading chamber line 128''. The use of such a clean fluid chamber allows the use of the annular pressure in the manner described above in conjunction with Figure 1C without directing any debris from the annular fluid to the SCSSV 100''. Also, in certain embodiments, the check valve 308 may be replaced with a spring-displaced check valve to regulate the amount of "load" provided to the self-loading chamber 300. Specifically, the displacement in the spring-displaced check valve can counterbalance the annular pressure so that the amount of pressure supplied to the self-loading chamber 300 corresponds to the difference between the annular fluid pressure and the spring displacement.
    [0031] Figure 2A represents a hanging tab 138A according to an illustrative embodiment of the present disclosure. The pendant tab 138A includes a sealing groove 202 that extends partially along a circumference of the pendant tab 138A and provides a space for a sealing insert 203. In certain implementations, the sealing insert 203 may be a secondary sealing material. switched on. A thin high voltage area 204 may rest on a seat (not shown). In certain implementations, the seal insert may be made of Polyether Ether Ketone ("PEEK") or any other suitable materials. Seal groove 202 may be used to contain seal insert 203. In accordance with some embodiments of the present disclosure, seal insert may only be added to the thicker portions of pendant tab 138A. Specifically, in certain implementations, thinner portions of pendant tab 138A and/or areas of pendant tab 138A that are wide and/or of low tension may not include a sealing insert.
    [0032] Figure 2B represents a hanging tab 138B according to another illustrative embodiment of the present disclosure. In this embodiment, a sealing groove 206 extends substantially along the entire outer circumference of the overhanging tab 138B. As described in conjunction with Figure 2A, the seal groove 206 can house a seal insert 208. The seal insert 208 can be made of any suitable materials, such as a non-elastomer seal (e.g., PEEK). As shown in Figures 2A and 2B, in accordance with certain embodiments, the sealing groove 206 and the sealing insert 208 placed therein may not be circular. As with the embodiment of Figure 2A, the seal groove 206 and the seal insert 208 may be provided in the thicker portions of the pendant tab 138B.
    [0033] Therefore, the pendant tab 138 provides a seal that enhances debris tolerance and seals off low pressure gas. As will be appreciated by those skilled in the art, the hanging tabs shown in Figures 2A and 2B are shown for illustrative purposes. However, the present disclosure is not limited to any particular pendant tab shape. Therefore, the pendant tab used may be in any form suitable without departing from the scope of the present disclosure.
    [0034] Turning now to Figure 1, the disclosed hydraulic control system is designed to be failsafe, so that if any one of the seals 108, 110, 112 fails, the pendant flap 138 will still close. The term "failure" as used herein in connection with fences refers to a state in which a fence has degraded beyond a threshold value and is no longer effectively operating as a fence.
    [0035] According to an implementation of the present disclosure, under normal operating conditions, when the pressure (P1) of the single control line 106 falls below a certain threshold value, the pressure of the closing spring 136 exceeds the pressure applied by the rod piston 102 to outflow tube 134 and pendant tab 138 is closed by closing spring 136. If seal 110 fails, the pressure on the first side of middle portion 102B of rod piston 102 (i.e., P1) will be the the same as the pressure on the second side of the middle portion 102B of the rod piston (i.e., P2) and the pressure applied by the pressure balanced piston is overcome by the compressed closing spring 136, thereby closing the pendant tab 138.
    [0036] Likewise, if the seal 108 fails, the high pressure of the piping enters the second piston chamber 122, the branch of the second piston chamber 118 and the single control line 106. The high pressure of the piping is then , directed to the first storage chamber compartment 124 through the branch of the first storage chamber 120. Therefore, the high pressure of the pipeline in the first storage chamber compartment 124 will exceed the pressure (P2) in the second storage chamber compartment 124. As a result, the rupture disk 130 of the storage chamber 124 ruptures. Once rupture disk 130 is ruptured, P1 and P2 will both be at the high pressure of the pipeline. As P1 and P2 are equal, the pressure applied by the pressure-balanced piston is overcome by the compressed closing spring 136, thereby closing the pendant tab 138.
    [0037] Finally, if the seal 112 fails, the high pressure from the piping enters the third piston chamber 126 and through the branch of the second storage chamber 128 into the second compartment of the storage chamber 124. When the pressure (P2) is high until high piping pressure, it exceeds the pressure (P1) of the single control line 106. Once the pressure (P2) exceeds the pressure (P1) by a preset amount, the rupture disk 130 ruptures and the pressures (P1) and (P2) will become the same. At this point, the pressure applied by the pressure-balanced piston is overcome by the compressed closing spring 136, thereby closing the pendant flap 138.
    [0038] In certain implementations, the SCSSV 100 may further include an orifice (not shown) that can be used to pressure test the metal-to-metal and/or elastomerically sealed third piston chamber 126. Specifically, a user may use the orifice to measure the pressure in the third piston chamber 126 to ensure that it is at a desired pressure such as, for example, in a vacuum. Therefore, a piston rod actuator (not shown) with ends that seal to the same diameter can be used to balance the hydraulic piston with pipeline pressure. Forces created by hydrostatic pressure applied through a single control line are significantly reduced by balancing the 102-rod piston hydraulic actuators with pipeline pressure. As a result, the minimum pressure required to retain the pendant tab 138 can be significantly reduced.
    [0039] Consequently, a deep adjusted SCSSV is revealed that can be operated with a single hydraulic control line. Changes in pressure of the three piston chambers 116, 122, 126 move the piston rod 102 between a first position and a second position. Movement of rod piston 102 moves outflow tube 134 which, in turn, opens and closes pendant flap 138. The disclosed SCSSV can be pressure balanced with pipeline pressure. As a result, the SCSSV can be operated with a low pressure hydraulic system.
    [0040] As would be appreciated by those skilled in the art, the methods and systems disclosed herein may be applicable to more than just SCSSVs. Therefore, any reference to a "flow tube" is for illustrative purposes only and is intended to refer generically to a part of a tool that is actuated by a piston assembly of a control system.
    [0041] According to certain implementations of the present disclosure a method of operating a downhole valve may be practiced. Therefore, a piston rod can be placed within a housing that forms a first piston chamber, a second piston chamber and a third piston chamber. High piping pressure can then be applied to the first piston chamber through a high-pressure piping branch. Surface pressure can be applied to the second piston chamber through a single control line which couples the second piston chamber to a first compartment of a storage chamber. The third piston chamber and a second compartment of the storage chamber can be fluidly coupled together and a pendant tab can be coupled to the piston rod. The movement of the piston rod can be operable to open and close the pendant flap.
    [0042] The present invention is, therefore, well suited to accomplish the objectives and achieve the aforementioned purposes, as well as those that are inherent in it. While the invention has been represented, described and defined by reference to examples of the invention, such reference does not imply a limitation of the invention and no such limitation will be inferred. The invention is capable of considerable modifications, alterations, and the like in form and function, as will occur to those of ordinary skill in the art having the benefit of this disclosure. The examples shown and described are not exhaustive of the invention. Accordingly, the invention is intended to be limited only by the spirit and scope of the appended claims, giving full knowledge of equivalents in all respects.
    权利要求:
    Claims (20)
    [0001]
    1. Hydraulic control system for controlling the operation of a downhole valve, characterized in that it comprises: a piston rod (102) disposed within a housing (104), wherein the piston rod (102) and the housing (104) forms a first piston chamber (116), a second piston chamber (122) and a third piston chamber (126), wherein a first piston chamber volume (116) and a third piston volume. piston chamber (126) vary inversely to what piston rod (102) is moved from one position to another in housing (104); a high pressure branch of piping (114) wherein the high pressure branch of piping (114) provides pressure to the first piston chamber (116) wherein the first piston chamber (116) is between a first seal. (108) at a first distal end (102A) of the piston rod (102) and a wall of the housing (104); a single control line (106) directed into the second piston chamber (122) and a branch of the first storage chamber (120) wherein the single control line (106) provides surface pressure for the second chamber. piston (122); wherein the second piston chamber (122) is between the first seal (108) and a second seal (110) on a first side of a middle portion (102B) of the piston rod (102); storage chamber (120) fluidly couples to a first compartment of a storage chamber (124) and the second piston chamber (122) to maintain the first compartment and the second piston chamber (122) at a first pressure; a second storage chamber branch (128), wherein the second storage chamber branch (128) fluidly couples to a second storage chamber compartment (124) and the third piston chamber (126), wherein a second pressure from the second compartment of the storage chamber (124) is directed to the third piston chamber (126) through the branch of the second storage chamber (128), wherein a compressible fluid maintains the second compartment of the storage chamber (124) and the third piston chamber (126) at the same pressure, and wherein the first compartment and the second compartment comprise a compressible fluid or a compressible gas; and a flow tube (134) coupled to the piston rod (102) and an overhanging tab (138), wherein the flow tube (134) moves between a first position and a second position in response to movement of the piston. rod (102), and wherein movement of the flow tube (134) between the first position and the second position is operable for at least one of opening the pendant tab (138) and closing the pendant tab (138).
    [0002]
    2. Hydraulic control system according to claim 1, characterized in that it further comprises a closing spring (136), wherein the closing spring (136) is displaced to close the pendant flap (138).
    [0003]
    3. Hydraulic control system according to claim 1, characterized in that the piston rod (102) comprises a third seal (112) at a second distal end (102C) thereof.
    [0004]
    4. Hydraulic control system according to claim 1, characterized in that the piston rod (102) comprises a middle portion (102B) having a first seal diameter (D1) and a first distal end (102A) and a second distal end (102C), both having a second seal diameter.
    [0005]
    5. Hydraulic control system according to claim 1, characterized in that the first compartment of the storage chamber and the second compartment of the storage chamber (124) are separated by a rupture disk (130).
    [0006]
    6. Hydraulic control system according to claim 1, characterized in that the pendant tab (138) comprises a sealing groove (202) and a sealing insert.
    [0007]
    7. Hydraulic control system according to claim 6, characterized in that the retaining tab comprises a thicker portion and a thinner portion and in that the sealing groove (202) and the sealing insert are arranged in the portion. thicker of the pendant flap (138).
    [0008]
    8. Method for operating a downhole valve, characterized in that it comprises: arranging a piston rod (102) within a housing (104) comprising a first piston chamber (116), a second piston chamber (122 ) and a third piston chamber (126), in which a volume of the first piston chamber (116), and a volume of the third piston chamber (126) vary inversely to what the piston rod (102) is moved by a position to another in the housing (104); wherein the first piston chamber (116) is between a first seal (108) at a first distal end (102A) of the piston rod (102) and a wall of the housing (104); and wherein the second piston chamber (122) is between the first seal (108) and a second seal (110) on a first side of a middle portion (102B) of the piston rod (102); applying a high pressure piping to the first piston chamber (116) through a high-pressure piping branch (114); applying surface pressure to the second piston chamber (122) via a single control line (106) directed into the second piston chamber (122) and a branch of the first storage chamber (120) in which the single control line (106) couples the second piston chamber (122) to a first compartment of a storage chamber (124) to maintain the first compartment and the second piston chamber (122) at a first pressure; fluidly coupling the third piston chamber (126) and a second compartment of the storage chamber (124), wherein a compressible fluid holds the second compartment of the storage chamber (124) and the third piston chamber (126) to the same pressure, wherein the second compartment of the storage chamber (124) is at a second pressure, and wherein the first compartment and the second compartment comprise a compressible fluid or a compressible gas; and coupling a pendant tab (138) to the rod piston (102), wherein movement of the rod piston (102) is operable for at least one of opening and closing the pendant tab (138).
    [0009]
    9. The method of claim 8, characterized in that a flow tube (134) couples the pendant tab (138) to the rod piston (102) and wherein movement of the rod piston (102) moves the flow tube (134).
    [0010]
    10. The method of claim 8, further comprising providing a closing spring (136), wherein the closing spring (136) is displaced to move the pendant tab (138) to a closed position.
    [0011]
    The method of claim 8, further comprising sealing the piston rod (102) within the housing (104), wherein the piston rod (102) comprises a third seal (112) in a second distal end (102C) thereof.
    [0012]
    12. Method according to claim 8, characterized in that the piston rod (102) comprises a middle portion (102B) having a first seal diameter (D1) and a first distal end (102A) and a second end distal (102C), both having a second seal diameter.
    [0013]
    13. Method according to claim 8, characterized in that it further comprises separating the first compartment of the storage chamber and the second compartment of the storage chamber (124) by a rupture disk (130).
    [0014]
    14. The method of claim 8, further comprising providing the pendant tab (138) with a sealing groove (202) and a sealing insert (203).
    [0015]
    15. The method of claim 14, characterized in that the retaining tab comprises a thicker portion and a thinner portion and wherein the sealing groove (202) and the sealing insert (203) are disposed in the thicker portion of the overhanging flap (138).
    [0016]
    16. System for controlling the operation of a downhole valve, characterized in that it comprises: a piston rod (102) forming a first piston chamber (116), a second piston chamber (122) and a third piston chamber (126) within a housing (104), wherein a volume of the first piston chamber (116) and a volume of the third piston chamber (126) vary inversely to what the piston rod (102) is moved. from one position to another in the housing (104), wherein the first piston chamber (116) is fluidly coupled to a high pressure piping, wherein the first piston chamber (116) is between a first seal (108) at a first distal end (102A) of the piston rod (102) and a housing wall (104); wherein the second piston chamber (122) is fluidly coupled to: a surface control line directed into the second piston chamber (122) and a branch of the first storage chamber (120) for maintaining the first compartment and the second piston chamber (122) at a first pressure, and a first compartment of a storage chamber (124); wherein the second piston chamber (122) is between the first seal (108) and a second seal (110) on a first side of a middle portion (102B) of the piston rod (102); and wherein the third piston chamber (126) is fluidly coupled to a second compartment of the storage chamber (124), wherein a compressible fluid maintains the second compartment of the storage chamber (124) and the third piston chamber (126 ) at a same pressure, wherein the second compartment of the storage chamber (124) is at a second pressure, and wherein the first compartment and the second compartment comprise a compressible fluid or a compressible gas; and a outflow tube (134) wherein the outflow tube (134) couples the rod piston (102) to a pendant tab (138), and wherein the rod piston (102) is moved between a first position. and a second position responsive to a change in pressure in at least one of the first piston chamber (116), the second piston chamber (122) and the third piston chamber (126); and wherein the movement of the rod piston (102) between the first position and the second position at least one opens and closes the pendant tab (138).
    [0017]
    17. The system of claim 16, further comprising a closing spring (136), wherein the closing spring (136) is displaced to move the pendant tab (138) to a closed position.
    [0018]
    18. System according to claim 16, characterized in that the piston rod (102) comprises a third seal (112) at a second distal end (102C) thereof.
    [0019]
    19. System according to claim 16, characterized in that the piston rod (102) comprises a middle portion (102B) having a first seal diameter (D1) and a first distal end (102A) and a second end distal (102C), both having a second seal diameter.
    [0020]
    20. System according to claim 16, characterized in that the first compartment of the storage chamber and the second compartment of the storage chamber (124) are separated by a rupture disk (130).
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    同族专利:
    公开号 | 公开日
    BR112015025866A2|2017-07-25|
    GB201516715D0|2015-11-04|
    US10113392B2|2018-10-30|
    NO20151301A1|2015-10-02|
    GB2527445B|2020-02-05|
    WO2014189494A1|2014-11-27|
    US20160138365A1|2016-05-19|
    GB2527445A|2015-12-23|
    引用文献:
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    US7896082B2|2009-03-12|2011-03-01|Baker Hughes Incorporated|Methods and apparatus for negating mineral scale buildup in flapper valves|
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    US9810343B2|2016-03-10|2017-11-07|Baker Hughes, A Ge Company, Llc|Pressure compensated flow tube for deep set tubular isolation valve|
    EP3430229A4|2016-03-14|2020-04-15|Halliburton Energy Services, Inc.|Mechanisms for transferring hydraulic regulation from a primary safety valve to a secondary safety valve|
    GB2558293A|2016-12-23|2018-07-11|Churchill Drilling Tools Ltd|Float Valve|
    GB2577438A|2017-07-18|2020-03-25|Halliburton Energy Services Inc|Control line pressure controlled safety valve equalization|
    WO2019040060A1|2017-08-23|2019-02-28|Halliburton Energy Services, Inc.|Balance line safety valve|
    US11015418B2|2018-06-06|2021-05-25|Baker Hughes, A Ge Company, Llc|Tubing pressure insensitive failsafe wireline retrievable safety valve|
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    GB2589261A|2018-08-23|2021-05-26|Halliburton Energy Services Inc|Insert safety valve|
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    US11230906B2|2020-06-02|2022-01-25|Baker Hughes Oilfield Operations Llc|Locking backpressure valve|
    US11215026B2|2020-06-02|2022-01-04|Baker Hughes Oilfield Operations Llc|Locking backpressure valve|
    US11215030B2|2020-06-02|2022-01-04|Baker Hughes Oilfield Operations Llc|Locking backpressure valve with shiftable valve seat|
    US11215028B2|2020-06-02|2022-01-04|Baker Hughes Oilfield Operations Llc|Locking backpressure valve|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-07-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-08-03| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 21/05/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/US2013/042040|WO2014189494A1|2013-05-21|2013-05-21|Tubing pressure insensitive surface controlled subsurface safety valve|
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