• 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 method of drilling a wellbore (1) with a constant diameter, in which there is provided a drilling device and several unexpanded casing sections (5), in which the drilling device is suspended by a cable (2 ) and comprises a drilling tool and an expansion system for installing and expanding the unexpanded casing sections (5), characterized in that for drilling and casing a section, the following steps are performed: a) a said section of unexpanded casing (5) is connected to the drilling device, b) the drilling tool drills a section and the debris is collected, c) the section of unexpanded casing (5) is installed in place and expanded by the system expansion, d) the drilling rig is raised to the surface and the debris is discharged.
    公开号:BE1027422B1
    申请号:E20195688
    申请日:2019-10-14
    公开日:2021-02-09
    发明作者:Sébastian Daniel Jean Desmette
    申请人:Diamant Drilling Services S A；
    IPC主号:
    专利说明:

    The present invention relates to a method of drilling and casing a wellbore with a constant diameter, in which a drilling device and several sections of casing are provided. unexpanded, wherein the drilling device is suspended by a cable and includes a drilling tool for drilling successive sections of the wellbore and an expansion system for casing successive sections.
    The present invention also relates to a drilling device for carrying out such a method.
    With a method of this type, boreholes having a constant diameter, regardless of their depth / length, can be made. Drill wells of this type are used, among other things, in the oil and gas industry as well as for geothermal applications.
    Drilling a wellbore several thousand meters long requires the installation of casing to hold the walls of the wellbore. The purpose of this is to avoid contamination of the various geological layers and of the water table, to isolate the wellbore from geological fluids and to control the pressures during drilling and maintenance operations. Existing methods of drilling and casing a wellbore consist of drilling a first section from the surface, then placing a casing and then drilling another section, followed by the placement of a casing, And so on. These existing methods all use complex drilling systems such as drilling systems including a drilling rig, drilling devices having complex debris removal elements and / or high power hydraulic systems to inject drilling fluid. from the surface to the bottom of the wellbore already drilled, and this among other things to evacuate the debris to the surface, and possibly to modify the composition of the drilling fluid according to the drilling needs.
    EP 1702133 describes a drilling device which is suspended by a cable, which has upper and lower cable lengths connected by cable connection means, in which the drilling device comprises a drilling tool and a drilling system. expansion as well as means to pump debris to the surface. This constitutes a fairly complex system. Likewise, to install the casing, unexpanded casing must be lowered from the cable to the drilling device and this by disconnecting the cable connection means of the upper and lower lengths of the cable, in order to place the unexpanded casing. around the cable. This is bulky. The drilling and casing of boreholes using existing methods or using the method described in document EP 1702133 are therefore tedious and expensive. As a result, for geothermal applications, the cost of drilling is often prohibitive.
    Therefore, it is an object of the invention to provide a method of drilling and casing a wellbore which is less complex and less expensive, so that the costs of drilling for a wellbore are more acceptable. This object is achieved by providing a method of drilling and casing a wellbore with constant diameter as described in paragraph 1 on page 1 of this description, in which for drilling and casing a section, the following steps are performed: a) a so-called unexpanded casing section is connected to the drilling device, b) the drilling tool drills a section and debris is collected, c) the expansion system trough the section drilled in expanding the unexpanded section of casing, a) the drilling device is raised to the surface and the debris is unloaded, and in which for drilling and casing a consecutive section the above mentioned steps are repeated and the drilling device is lowered in the last section drilled and cased, and in which step a is performed before the drilling device is lowered, and steps b, c and d are performed after the drilling device has been lowered.
    By using a drilling device which is suspended by a cable, the installation of a complex drilling rig on the surface can be avoided. Everything that the drilling rig needs, for example power, can be supplied by the cable. Likewise, in using a drilling device which is capable of both drilling a section and casing a section, only one device should be provided. In this method, the debris, which is generated by drilling a said section, is collected and is discharged to the surface after the drilling device is raised, so that it is not necessary to provide an expensive pumping system. , or the like, to pump debris to the surface. By collecting the debris before descending, the drilling rig is cleared of debris while it is descending, so that the descent can be performed in a simple and quick manner.
    This method requires a drilling device considerably less complex than the drilling device required for already existing methods, and this method can moreover be carried out easily so that the drilling costs for drilling a wellbore are considerably reduced by virtue of this process. It is therefore possible to drill boreholes even for geothermal applications.
    Here the unexpanded tubing section can be easily brought to the desired location in the drilled section because it is transported by the drilling device itself. When the drilling device is lowered into the last drilled and cased section, the unexpanded casing section can further be transported while the drilling tool drills the subsequent section, so that the unexpanded casing section is immediately in place after drilling has been completed. If the expansion system includes a tubing section positioning system, then that tubing positioning system must place the unexpanded tubing section in the correct position, and then expansion of the unexpanded tubing can begin. However, it is also possible that the unexpanded section of casing will remain in the last drilled and cased section while the drill tool drills the subsequent section.
    The unexpanded section of casing is then grasped after drilling the subsequent section and installed in place so that it can be expanded.
    A section of unexpanded casing can easily be connected to the drilling device since the drilling device is reassembled after drilling and casing a section, so that the drilling device is then located on the surface and either Easily accessible for attaching a section of unexpanded casing to the drilling rig.
    For example, the drilling device can be moved in such a way that the entire drilling device is located above the surface, so that a section of unexpanded casing can be attached to the drilling device by the below.
    Here the cable does not interfere with the connection of an unexpanded tubing section to the drilling device.
    The drilling tool may have a drill head including at least one removable part or a drill head including at least one retractable part, so that the unexpanded section of casing can be easily connected to the drilling device from below. in such a way that the unexpanded casing section surrounds for example at least a part of the drilling device.
    In an alternate embodiment, the unexpanded tubing section can be attached to the drilling device from above.
    This is possible when the drilling device is detachably connected to the cable in a simple manner using the cable connection elements which are located at the height of the top of the drilling device.
    One can then simply disconnect the cable connection means and attach a section of unexpanded tubing to the drilling device from above.
    This method is preferably used for drilling a substantially vertical wellbore.
    The first section which is drilled is then drilled from the surface and the drilling device is then successively lowered and raised.
    Descent means lower the drilling device into the section (s) (successive (s)) already drilled and cased (s). Raising means bring the drilling device back to the surface from the section (s) (successive (s)) already drilled and cased (s). For drilling vertical boreholes, no additional tractor devices are required.
    For drilling horizontal wellbores, a tractor device is preferably provided, for example, to facilitate horizontal movement of the drilling device.
    The drilling device may be a wired drilling device.
    In a preferred embodiment, the drilling device includes a compartment for collecting debris and, in step b, the debris is collected in the compartment.
    The drilling device can then be equipped with a debris evacuation system to evacuate and store the debris in said compartment.
    This compartment can be a kind of basket and the debris disposal system can include simple elements, such as for example a rotating screw element, to transport the debris to the compartment, since the debris disposal system debris should only carry the debris to the compartment and therefore not directly to the surface.
    By storing the debris in said compartment, the drilling device can be easily reassembled and further the collection of debris from the surface can be carried out in an efficient and simple manner.
    When the debris is unloaded and the drilling device is lowered again, the compartment is empty so that there is no more or practically any more debris which could interfere with the descent of the drilling device.
    Drilling fluid can then easily pass through the compartment during descent.
    Preferably, the debris is directly packaged in a bag or tube in said compartment for the purpose of easily removing the debris after the drilling device has been brought to the surface.
    To this end, an empty bag or empty tube is placed in the compartment before the drilling device is lowered to drill and casing a consecutive section.
    In an alternative embodiment, the debris can also be collected above the drilling device, in which the debris is then brought up by raising the drilling device.
    The drilling device is preferably lowered and raised using the cable.
    The drilling device is here suspended from a cable which extends from the surface so that with the aid of the cable the drilling device can be easily raised to the surface and lowered from the surface.
    This cable can be used only for raising and lowering the drilling device, but preferably this cable also supplies power to the drilling device and, in a specific embodiment, this cable can also be an umbilical cable which provides via further example a drilling fluid to the drilling device.
    To lower and raise the drilling device using the cable, cable traction means are preferably used.
    These cable traction means are then preferably installed on the surface.
    These cable pulling means can be very simple.
    For example, they may include one or more pulley (s), a cable reel, and a simple motor for rotating the cable reel.
    No expensive drilling rig is required for a cable of this type.
    In a preferred embodiment the cable supplies energy to the drilling device.
    For example, the cable can supply power to the drilling tool and / or the expansion system.
    This energy can be electrical energy and / or hydraulic energy.
    The advantage here is that the drilling device itself can receive all the necessary energy from the cable, so that there is no need to employ a complex drilling rig.
    Likewise, since the power is supplied through the cable, the drilling device does not need batteries or the like, so that the volume of the drilling device can be kept reasonable and does not require no worry about the temperature at the height of the borehole.
    Further preferably, the drill tool comprises a motor and a drill head which is driven by the motor, wherein the cable supplies power to the motor.
    This motor can be an electric motor or a hydraulic motor.
    Preferably, a said section of unexpanded casing is placed around at least a portion of the drilling device in order to connect the section of unexpanded tubing to the drilling device.
    The unexpanded section of tubing is then placed in such a manner that said unexpanded section of tubing surrounds at least a portion of the drilling device.
    The diameter of the outer surface of the unexpanded tubing section is such that it is smaller than the diameter of the already drilled and cased section so that the drilling device can be lowered easily.
    During the drilling and casing of a consecutive section, the drilling device preferably relies on the previous drilled and cased section.
    The drilling section therefore rests on an already installed expanded casing section.
    This means that while drilling the consecutive section, the drilling tool can build on the previous drilled and cased section, and during the expansion of the unexpanded casing section, the expansion system can shift. press the previous drilled and cased section.
    More preferably, during drilling and casing of a consecutive section, where the drilling device bases / rests on the previous drilled and cased section, the drilling device seals the space between the drilling device and the previous drilled and cased section.
    The result is that a seal is created.
    This increases control of the well and helps manage pressure.
    Indeed, if a formation fluid is released during drilling, it is controlled thanks to this sealing.
    This prevents the fluid from rising higher in the well, and in particular to the surface. The liquid can be liquid, such as water or oil or gas. The drilling device may optionally allow the fluid to pass in a controlled manner in order to gradually and in a controlled manner reduce the pressure coming from the inflow of the fluid.
    In a specific embodiment, the drilling tool is a coring tool and, during the drilling of a said section, a core is collected and this core is unloaded after the drilling device has raised to the surface. In this embodiment, the amount of debris which is generated and which has to be collected is greatly reduced. In addition, the core can provide valuable information regarding the progress of drilling the wellbore. For example, one can see the composition of the formation and one can see when said composition changes.
    Preferably, before connecting a said section of unexpanded casing to the drilling device, the drilling device is checked for defects. The search for faults can be carried out very carefully. The search for faults can also be carried out quickly, for example a quick visual inspection should also be regarded as a search for faults. The search for faults can be carried out in a planned manner. For example, one can perform several quick and less rigorous inspections followed by a close inspection which is again followed by several quick and less rigorous inspections. Since the drilling rig is brought to the surface, faults can be detected quickly.
    This is particularly important for parts of the drilling rig that wear out quickly, such as parts that come into direct contact with the formation during drilling.
    These elements are for example the drilling head, the boring arms, etc.
    Since the drilling rig is raised to the surface after drilling and casing a section, it is also possible to replace the drill head, the reaming arms or other parts of the drilling rig. so that these can be replaced when the formation changes or when they are broken.
    In a preferred embodiment, the drilling device comprises a reservoir for a sealing material, and during the casing of the drilled section, a so-called unexpanded tubing section is expanded and adhered to the material which surrounds the drilled section, to using the sealant.
    The sealing material can for example be concrete or a chemical adhesive.
    The wellbore is drilled into the ground.
    Ie material which surrounds the drilled section is therefore the material of said soil at the height of the drilled section.
    It can be rock (solid), soil material, etc.
    By connecting the section of expanded casing to said material, therefore for example to rock material, it is better ensured that the various sections of expanded casing will remain in place and therefore that the wellbore will be more stable.
    In a specific embodiment, an inflatable material is attached to the unexpanded section of tubing prior to the descent of the drilling device, and this inflatable material inflates during or after expansion of the unexpanded section of tubing, so that the section of expanded tubing be bonded to the material surrounding the drilled section and to the previous section of expanded tubing at the overlap.
    This inflatable material will adhere here to the material which surrounds the drilled section, therefore for example to the rock, so that a stable and tight borehole is obtained.
    The wellbore is preferably a wellbore which extends vertically, and preferably also each section drilled has a dimension of between 1 m and 50 m, and specifically between 8 m and 50 m, in the vertical direction.
    The expansion system preferably includes a tubing section positioning system, one or more expander (s), and a tubing section leakage control system.
    In a preferred embodiment, one or more sensor (s) is (are) connected to the drilling device, and a monitoring device is provided which is in contact with the sensors, in order to monitor the drilling and the drilling. casing of the wellbore.
    The monitoring device is preferably installed at the surface such that the drilling and casing of the wellbore can be monitored at the surface, for example by an operator.
    Since all operations are carried out at the bottom of the well and with a drilling device which is connected to the surface by means of a cable, several sensors can be connected to the drilling device in order to monitor, for example from the surface, the different stages during drilling and casing of the wellbore.
    These sensors can be pressure sensors, displacement sensors, proximity sensors, force sensors, rotation sensors, flowmeter sensors, extensometer sensors, voltage sensors, electric current sensors , gamma ray sensors, sonic sensors, resistivity sensors, vibration sensors, orientation sensors, thickness sensors, and the like, and this in order to monitor among others the drilling process, the process debris collection, the casing process and the expansion process.
    The information obtained by the sensors can be transmitted to the monitoring device using the cable.
    The cable is then also a data transmission cable which supplies data from the sensors to the monitoring device.
    This cable then preferably also supplies energy to the drilling device.
    Here the process is well observed at all times, so that this process can be carried out under optimal conditions.
    Observations can be made by an operator and / or by a computer, and interventions, adaptations and decisions can be made in real time.
    In a specific embodiment, the drilling device includes a directional system for drilling and casing a consecutive section from a previous drilled and cased section at the desired angle from the previous drilled and cased section.
    Here it is possible to hit a specific target, since it is possible to change the direction of the wellbore drilled while drilling the wellbore.
    It is also possible to slowly switch from a vertical direction to a horizontal direction, or vice versa.
    The object of the invention is also achieved by providing a drilling device for performing the method described above.
    The present invention will now be explained in more detail below with reference to the following detailed description of several preferred embodiments of a method and of a drilling device according to the invention. The purpose of this description is only to provide illustrative examples and to show additional advantages and features, therefore it cannot be interpreted as constituting a limitation on the scope of the invention or of the patent rights claimed. in the claims.
    In this detailed description, reference is made with the aid of reference numbers to the accompanying figures, in which: Figure 1 shows a section of the top of a drilling device according to the invention, the drilling device extending to through a previous drilled and cased section; and Figure 2 shows a schematic overview of six consecutive steps during the drilling and casing of a wellbore section according to a method according to the invention.
    The drilling device is used for drilling and casing a wellbore extending vertically (1) from a surface. The drilling device comprises, among other things, a drilling tool and an expansion system. The drilling device is suspended by a cable (2) and can therefore be called a wired drilling device.
    The drilling tool comprises, among other things, a removable drilling head (3), a compartment (6) for collecting debris and / or a core, a motor (7), in which the drilling head (3) is driven by the motor (7), boring arms (9) for enlarging the diameter of the sections while drilling these sections and the support members (8). The cable (2) supplies power to the motor (7). The expansion system includes a tubing section positioning system, expanders (4) and a tubing section leakage control system.
    The drilling and casing of a wellbore (1) is carried out as follows: firstly an unexpanded casing section (5) is connected to the drilling device.
    Figure 1 shows a drilling device with an unexpanded tubing section (5) connected to it.
    Then the drilling tool drills a section.
    The drilling device relies on an already drilled and cased drilling section to drill the subsequent section and expand the unexpanded casing section (5), and this with the aid of the support elements (8). This is shown in steps 1 and 2 of Figure 2. As can be seen in Figure 2, the unexpanded section of casing (5) is transported with the drilling tool as the drilling tool drills the section. .
    This means that the unexpanded casing section (5) is already in place immediately after the drilling of said section has been carried out.
    During the drilling of the section, debris and possibly the core, depending on the type of drilling device, is collected in the compartment (6) of the drilling tool.
    The bore arms (9) are in their open position such that the drilled section reaches the desired diameter so that the unexpanded tubing section (5) can be expanded.
    When the section drilling is done, the tubing section positioning system positions the unexpanded tubing section (5) in the desired position, and then the expanders (4) expand the unexpanded tubing section (5) and this during the recovery of the drilling device from said last drilled section.
    This is clearly shown in steps 3 to 6 of Figure 2. During the recovery of the drilling device, the boring arms (9) are in their retracted position.
    Each section of unexpanded casing (5) is provided with an inflatable material attached to its outer surface so that during the recovery of the drilling device and the expansion of said section of casing (5), the section of expanded casing is connected to the material which surrounds the drilled section using said inflatable material.
    After the expansion of the casing section, the drilling device is raised to the surface using the cable (2) and the debris and possibly the core are discharged out of the compartment (6). The drilling device is checked for faults, either carefully or quickly, and another section of unexpanded casing (5) is connected to the drilling device and the drilling device is lowered into the section (s) ( s) already drilled and cased so that the steps described above can be repeated and another section can be drilled and cased.
    权利要求:
    Claims (18)
    [1]
    Method of drilling and casing a wellbore (1) with constant diameter, in which there is provided a drilling device and several unexpanded casing sections (5), in which the drilling device is suspended. by a cable (2) and comprises a drilling tool for drilling successive sections of the wellbore (1) and an expansion system for casing the successive sections, characterized in that for drilling and casing a section, the steps The following are performed: a) a so-called unexpanded casing section (5) is connected to the drilling device, b) the drilling tool drills a section and debris is collected, c) the expansion system trough the drilled section by expanding the unexpanded casing section (5), d) the drilling device is brought to the surface and the debris is unloaded, and in that for drilling and casing a consecutive section the steps described above are repeated and the drilling rig is lowered into the d last section drilled and cased, and in that step a is performed before the drilling device is lowered and steps b, c and d are performed after the drilling device has been lowered.
    [2]
    2. Method according to claim 1, characterized in that the drilling device comprises a compartment (6) for collecting the debris, and in that in step b, the debris is collected in the compartment (6).
    [3]
    3. Method according to claim 1 or 2, characterized in that the drilling device is raised and lowered using the cable (2).
    [4]
    4. Method according to any one of the preceding claims, characterized in that the cable (2) supplies energy to the drilling device.
    [5]
    5. Method according to claim 4, characterized in that the drilling tool comprises a motor (7) and a drilling head (3) which is driven by the motor (7), in which the cable (2) provides energy to the engine (7).
    [6]
    A method according to any one of the preceding claims, characterized in that the unexpanded tubing section (5) is placed around at least a portion of the drilling device to connect the unexpanded tubing section (5) to the. drilling device.
    [7]
    7. Method according to any one of the preceding claims, characterized in that, during the drilling and casing of a consecutive section, the drilling device is based on the previous drilled and cased section.
    [8]
    8. Method according to claim 7, characterized in that, during the drilling and casing of a consecutive section, at the level where the drilling device is based on the previous drilled and cased section, the drilling device seals the space. between the drilling device and the previous drilled and cased section.
    [9]
    9. Method according to any one of the preceding claims, characterized in that the drilling tool is a coring tool and in that, during the drilling of a said section, a core is collected and this core is unloaded afterwards. that the drilling rig has been brought to the surface.
    [10]
    10. A method according to any one of the preceding claims, characterized in that, before connecting a said section of unexpanded casing (5) to the drilling device, the drilling device is checked for defects.
    [11]
    11. Method according to any one of the preceding claims, characterized in that the drilling device comprises a reservoir for a sealing material, and in that, during the casing of the drilled section, a said section of unexpanded casing. (5) is foamed and is sealed to the material surrounding the drilled section, using the sealing material.
    [12]
    12. A method according to any one of the preceding claims, characterized in that an inflatable material is attached to the unexpanded tubing section (5) before the descent of the drilling device and this inflatable material inflates during or after the. expanding the unexpanded section of tubing (5) such that the section of expanded tubing (5) is sealed to the material surrounding the drilled section.
    [13]
    13. Method according to any one of the preceding claims, characterized in that the wellbore (1) is a vertically extending wellbore (1).
    [14]
    14. Method according to any one of the preceding claims, characterized in that each drilled section has a dimension of between 1 m and 50 m in the vertical direction.
    [15]
    15. Method according to any one of the preceding claims, characterized in that the expansion system comprises a tubing section positioning system, one or more expander (s) (4) and a section leakage control system. casing.
    [16]
    16. Method according to any one of the preceding claims, characterized in that one or more sensor (s) is (are) connected to the drilling device, and in that a monitoring device is provided which is in contact with the sensors, in order to monitor the drilling and casing of the wellbore.
    [17]
    17. A method according to any one of the preceding claims, characterized in that the drilling device comprises a directional system for drilling and casing a consecutive section from a previous drilled and cased section at the desired angle with respect to the previous drilled and cased section.
    [18]
    18. A drilling device for carrying out the method according to any one of claims 1 to 17.
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    同族专利:
    公开号 | 公开日
    BE1027405A1|2021-01-29|
    BE1027405B1|2021-02-04|
    BE1027422A1|2021-02-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2278112A3|2003-01-31|2017-12-13|Weatherford Technology Holdings, LLC|Apparatus and methods for drilling a wellbore using casing|
    DE602004009910T2|2003-04-25|2008-08-21|Shell Internationale Research Maatschappij B.V.|METHOD FOR PRODUCING A BOREOUR OF AN EARTH INFORMATION|
    GB0329712D0|2003-12-22|2004-01-28|Bp Exploration Operating|Process|
    RU2671369C1|2014-10-08|2018-10-30|Хэллибертон Энерджи Сервисиз, Инк.|Drilling with liner using a withdrawable guide assembly of the bottom|
    法律状态:
    2021-04-19| FG| Patent granted|Effective date: 20210209 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20195417A|BE1027405B1|2019-06-28|2019-06-28|BOREHOLE AND BOREHOLE WELL DRILLING PROCESS|PCT/IB2020/056055| WO2020261197A1|2019-06-28|2020-06-26|Method for drilling and lining a wellbore|
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