Self-adaptive sleeve driving device

Abstract

The utility model provides a self-adaptive sleeve driving device which comprises a double-female short section, and the upper end of the double-female short section is connected with a top drive. The stop nut is arranged outside the double-female short section, the mandrel is connected to the lower end of the double-female short section, the mandrel is sleeved with a short section with a buckle, and the short section with the buckle is connected with a sleeve; wherein a buffer spring is arranged between the stop nut and the short section with the buckle. According to the utility model, the problems of top drive and casing connection and drilling circulation are solved, and the casing clamp holder can be replaced.

Description

Technical Field

[0001] The utility model relates to an adaptive casing driving device, which solves the problems of top drive and casing connection and drilling fluid circulation. Background Art

[0002] Casing drilling combines the two processes of drilling and casing into one process. During the drilling process, casing is directly used to replace the drill pipe to transmit mechanical energy and hydraulic energy to the well. The downhole drill assembly is connected under the casing string. The casing is lowered while drilling. The downhole drill assembly is raised and lowered in the casing. Conventional drilling operations are no longer required. After drilling, the casing is left in the well for completion. This technology can reduce drilling costs, reduce problems related to drilling, improve well control conditions, and improve hydraulic parameters, annulus return speed, and wellbore cleaning conditions. Since the top drive cannot be directly connected to the casing, the top drive torque cannot be transmitted to the casing string, and the drilling fluid circulation cannot be established.

[0003] At present, the common practice at home and abroad is to use a casing holder, which is connected between the top drive and the casing to achieve casing drilling operations, torque transmission and drilling fluid circulation. However, the casing clamp has the following problems: First, the structure is complex, hydraulic control is adopted, and a hydraulic station is required; second, the installation time of the casing clamp is long (generally 4-5 hours). If there is a problem with the clamp during drilling, the maintenance or replacement time is long, and it is easy to cause complex situations downhole; third, the casing holder is connected to the casing by clamping the outer wall of the casing or supporting the inner wall of the casing. It is not a rigid connection, and the speed is limited during drilling. When the drill is stuck downhole, the lifting force that can be applied to release the jam is limited; fourth, the cost is high, resulting in high casing drilling costs. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, the utility model proposes an adaptive casing driving device to solve the problems of top drive and casing connection and drilling circulation, and the casing clamp can be replaced.

[0005] The utility model proposes an adaptive casing driving device, comprising:

[0006] A double female short section, the upper end of which is connected to a top drive;

[0007] A stop nut disposed on the outside of the double female nipple, and

[0008] A mandrel connected to the lower end of the double female short section, the mandrel is sleeved with a buckle short section, and the buckle short section is connected to a sleeve;

[0009] Wherein, a buffer spring is arranged between the stop nut and the buckle short section.

[0010] A further improvement of the utility model is that a plurality of straightening blocks are arranged along the circumferential direction at the lower part of the mandrel, and an elastic member is arranged on the inner side of the straightening blocks;

[0011] The straightening block is sleeved inside the casing, and the straightening block supports the inner wall of the casing in the radial direction.

[0012] A further improvement of the utility model is that the spindle includes a threaded section connected to the double female short section, a buckle short section installation section is provided below the threaded section, and the buckle short section is slidably provided on the buckle short section installation section;

[0013] A cylindrical section is arranged below the sliding section of the buckle short section, and a plurality of sink grooves are arranged on the cylindrical section. The sink grooves are used to install the straightening block.

[0014] A further improvement of the utility model is that the cross-section of the buckle short section installation section is a polygonal structure, a polygonal hole is provided inside the buckle short section, the polygonal hole is sleeved on the polygonal structure, and torque is transmitted through the polygonal structure.

[0015] A further improvement of the utility model is that the polygonal structure is a hexagonal column, and the polygonal hole is a hexagonal hole.

[0016] A further improvement of the utility model is that the sinking groove comprises a large rectangular groove, small rectangular grooves are respectively arranged on both sides of the large rectangular groove, and a plurality of sinking holes are also arranged at the bottom of the large rectangular groove.

[0017] A further improvement of the utility model is that the straightening block comprises an arc-shaped top surface and a flat bottom surface; a blind hole corresponding to the countersunk hole is arranged on the bottom surface;

[0018] Wherein, one end of the elastic member is defined in the blind hole, and the other end is defined in the countersunk hole.

[0019] A further improvement of the utility model is that protruding limiting pieces are arranged on both sides of the straightening block, the main body of the straightening block is arranged in the large rectangular groove, and the limiting pieces are arranged in the small rectangular groove.

[0020] A further improvement of the utility model is that an upper pressing block is arranged at the upper end of the straightening block, and a lower pressing block is arranged at the lower end; the upper pressing block and the lower pressing block are respectively fixed in two small rectangular grooves and covered on the limiting piece.

[0021] A further improvement of the utility model is that an annular groove is provided on the inner side of the upper part of the buckle short section, and a sealing step is provided in the annular groove;

[0022] The buffer spring is disposed in the annular groove.

[0023] Compared with the prior art, the advantages of the utility model are:

[0024] According to the adaptive casing driving device of the utility model, the connection problem between the top drive and the casing and the drilling cycle is solved, and the casing clamp can be replaced. The double female short section can connect the top drive and the mandrel, and the mandrel is provided with a buckle short section, which can connect the casing to complete the connection between the top drive and the casing. In the adaptive casing driving device of the utility model, the buffer spring can play a buffering role to avoid the rigid connection between the top drive and the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0026] Figure 1 The figure shows a schematic structural diagram of an adaptive sleeve driving device according to an embodiment of the utility model;

[0027] Figure 2 for Figure 1 AA section view;

[0028] Figure 3 for Figure 1 BB cross-sectional view;

[0029] Figure 4 for Figure 1 CC section view;

[0030] Figure 5 The figure shows a schematic structural diagram of a spindle of an embodiment of the utility model;

[0031] Figure 6 The figure shows a schematic structural diagram of a buckle short section of an embodiment of the utility model;

[0032] Figure 7 The figure shows a schematic structural diagram of a straightening block according to an embodiment of the utility model;

[0033] Figure 8 for Figure 7 A schematic diagram of the structure of the A-direction surface;

[0034] The drawings are not drawn to scale.

[0035] The meanings of the reference numerals in the accompanying drawings are as follows:

[0036] 1. Double female pup joint, 2. Stop nut, 3. Buffer spring, 4. Mandrel, 5. Buckle pup joint, 6. Upper pressure block, 7. Straightening block, 8. Straightening spring, 9. Lower pressure block, 401. Countersunk groove, 402. Countersunk hole, 403. Buckle pup joint installation section, 404. Threaded section, 405. Round hole, 406. Conical section, 407. Cylindrical section, 501. Drilling type casing buckle, 502. Polygonal hole, 701. Arc surface, 702. Bottom surface, 703. Blind hole. DETAILED DESCRIPTION

[0037] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0038] Casing drilling combines the two processes of drilling and casing into one process. During the drilling process, casing is directly used to replace the drill pipe to transmit mechanical energy and hydraulic energy to the well. The downhole drill assembly is connected under the casing string. The casing is lowered while drilling. The downhole drill assembly is raised and lowered in the casing. Conventional drilling operations are no longer required. After drilling, the casing is left in the well for completion. This technology can reduce drilling costs, reduce problems related to drilling, improve well control conditions, and improve hydraulic parameters, annulus return speed, and wellbore cleaning conditions. Since the top drive cannot be directly connected to the casing, the top drive torque cannot be transmitted to the casing string, and the drilling fluid circulation cannot be established.

[0039] At present, the common practice at home and abroad is to use a casing holder, which is connected between the top drive and the casing to achieve casing drilling operations, torque transmission and drilling fluid circulation. However, the casing clamp has the following problems: First, the structure is complex, hydraulic control is adopted, and a hydraulic station is required; second, the installation time of the casing clamp is long (generally 4-5 hours). If there is a problem with the clamp during drilling, the maintenance or replacement time is long, and it is easy to cause complex situations downhole; third, the casing holder is connected to the casing by clamping the outer wall of the casing or supporting the inner wall of the casing. It is not a rigid connection, and the speed is limited during drilling. When the drill is stuck downhole, the lifting force that can be applied to release the jam is limited; fourth, the cost is high, resulting in high casing drilling costs.

[0040] In order to solve the above problems, the utility model provides a casing driving device and a method of using the same, which can solve the problems of top drive and casing connection and drilling circulation, and can replace the casing clamp.

[0041] In such Figure 1 In the illustrated embodiment, an adaptive casing driving device comprises:

[0042] The double female pup joint 1 has female joints at both the upper and lower ends thereof, the upper end of which is connected to an upstream component, such as a top drive, and the lower end of which is connected to a spindle 4.

[0043] A stop nut 2 is sleeved on the outside of the double female pup joint 1 . The stop nut 2 is arranged on the outside of the double female pup joint 1 through threads, and the position of the stop nut 2 in the axial direction of the double female pup joint 1 can be adjusted through the threads.

[0044] The mandrel 4 is arranged at the lower end of the double female short section 1, and the two are connected by threads.

[0045] A buckle short section 5 is sleeved on the spindle 4. The buckle short section 5 can slide axially on the spindle 4, and the outside of the buckle short section 5 is connected to a sleeve.

[0046] A buffer spring 3 is provided between the stop nut 2 and the buckle short section 5 . When the buckle short section 5 slides on the spindle 4 , the buffer spring 3 can form a buffer between the stop nut 2 and the buckle short section 5 .

[0047] In the adaptive casing drive device according to the present embodiment, the double female short section 1 is connected to the top drive and the spindle 4 respectively through the female threads at the upper and lower ends, the buckle short section 5 can be connected to the casing and can slide on the double female short section 1, and can also compress the buffer spring 3 during the sliding process.

[0048] In one embodiment, a plurality of straightening blocks 7 are circumferentially arranged at the lower portion of the spindle 4 , and elastic members are arranged on the inner sides of the straightening blocks 7 .

[0049] The elastic member provides the straightening block 7 with elastic force in the radially outward direction.

[0050] The straightening block 7 is sleeved inside the casing, and the straightening block 7 supports the inner wall of the casing in the radial direction.

[0051] In the adaptive casing drive device according to this embodiment, after the upper end is connected to the top drive and the lower end is connected to the casing, the buffer spring 3 can play a role in vibration reduction and buffering. The straightening block 7 can play a role in connecting the lower end of the mandrel 4 to the casing in the center to prevent deflection during rotation.

[0052] In one embodiment, the mandrel 4 includes a threaded section 404 connected to the double female short section 1, and the threaded section 404 is a tapered male joint structure as a whole, and a thread is arranged on the tapered surface. Correspondingly, the lower end of the double female short section 1 is a tapered female joint, and a thread is arranged on the inner surface of the female joint.

[0053] A buckle short section installation section 403 is provided below the threaded section 404, and the buckle short section 5 is slidably provided on the buckle short section installation section 403. The buckle short section 5 can slide on the buckle short section installation section 403, and torque can be transmitted between the buckle short section installation section 403 and the buckle short section 5.

[0054] A cylindrical section 407 is provided below the sliding section of the buckle short section 5, and a plurality of sink grooves 401 are provided on the cylindrical section 407. The sink grooves 401 are used to install the straightening block.

[0055] Below the cylindrical end is a conical section 406 .

[0056] In the adaptive casing driving device according to this embodiment, the spindle 4 is structurally divided into multiple sections and realizes different functions. The threaded section 404 is used to connect the double female nipple 1. The buckle nipple installation section 403 is used to install the buckle nipple 5 and provide support for the sliding of the buckle nipple 5, while also being able to transmit torque. The cylindrical section 407 is provided with a plurality of sinks 401 for installing the straightening block.

[0057] In one embodiment, the cross-section of the buckle short section installation section 403 is a polygonal structure, and a polygonal hole 502 is provided inside the buckle short section 5. The polygonal hole 502 is sleeved on the polygonal structure and transmits torque through the polygonal structure.

[0058] In the adaptive sleeve driving device according to this embodiment, the buckle short section installation section 403 is a polygonal structure, which can be used to transmit torque. In addition, the polygonal structure can also allow the buckle short section 5 to slide on the buckle short section installation section 403.

[0059] Preferably, the polygonal structure is a 4-8 deformation structure. When the polygonal structure has fewer sides, such as a triangle, it will affect the overall strength. When the polygonal structure has more sides, it will affect the supporting effect of transmitting torque.

[0060] In a preferred embodiment, the polygonal structure is a hexagonal column, and its cross section is a regular hexagon, which can ensure the transmission of torque and the sliding effect.

[0061] In one embodiment, the sink 401 includes a large rectangular groove, and small rectangular grooves are respectively arranged on both sides of the large rectangular groove. The area of ​​the small rectangular groove is smaller than that of the large rectangular groove, and the small rectangular grooves are respectively arranged on both sides of the large rectangular groove.

[0062] A plurality of countersunk holes 402 are also provided at the bottom of the large rectangular groove.

[0063] In this embodiment, the large rectangular groove is used to install the straightening block 7, and the small rectangular groove is used to limit the straightening block 7. The countersunk hole 402 at the bottom of the large rectangular groove is used to install the elastic member.

[0064] In a preferred embodiment, the straightening block 7 comprises an arc-shaped top surface and a flat bottom surface 702; a blind hole 703 corresponding to the countersunk hole 402 is provided on the bottom surface 702;

[0065] One end of the elastic member is defined in the blind hole 703 , and the other end is defined in the counterbore 402 .

[0066] In one embodiment, protruding limit plates are provided on both sides of the straightening block 7, and the positions of the limit plates match the positions of the small rectangular grooves; the main body of the straightening block is arranged in the large rectangular groove, and the limit plates are arranged in the small rectangular grooves.

[0067] In one embodiment, an upper pressing block 6 is provided at the upper end of the straightening block 7, and a lower pressing block 9 is provided at the lower end; the upper pressing block 6 and the lower pressing block 9 are respectively fixed in two small rectangular grooves and covered on the limiting piece.

[0068] In one embodiment, an annular groove is provided on the inner side of the upper portion of the buckle short section 5, and a sealing step is provided in the annular groove;

[0069] The buffer spring 3 is arranged in the annular groove.

[0070] The following describes the invention in conjunction with specific embodiments.

[0071] Example 1

[0072] A structural schematic diagram of an adaptive casing driving device includes a double female short section 1, a stop nut 2, a buffer spring 3, a spindle 4, a buckle short section 5, and a straightening block 7.

[0073] The double female short section 1 is connected to the spindle 4 through threads; the stop nut 2 is fixed on the double female short section 1 through threads; the buckle short section 5 is sleeved on the spindle 4; the buffer spring 3 is sleeved on the spindle 4 and is arranged between the stop nut 2 and the buckle short section 5;

[0074] The straightening block 7 is embedded in the sink groove 401 of the spindle 4 and fixed by the pressing block 96 ; the straightening spring 8 is arranged between the straightening block 77 and the sink groove 401 .

[0075] The spindle 4 includes a threaded section 404, a buckle short section installation section 403, a cylindrical section 407 and a conical section 406, and a circular hole 405 is axially arranged to penetrate the threaded section 404, the buckle short section installation section 403, the cylindrical section 407 and the conical section 406. The buckle short section installation section 403 is a hexahedral structure, and the contact points between the surfaces are all transitioned by arcs.

[0076] The cylindrical section 407 is evenly provided with a plurality of sink grooves 401 along the circumferential direction. The sink groove 401 is composed of a large rectangular groove and two small rectangular grooves, and the small rectangular grooves are arranged on both sides of the large rectangular groove. A plurality of sink holes 402 are arranged at the bottom of the large rectangular groove.

[0077] The buckle nipple 5 is a tubular structure as a whole, with a drilling-type casing buckle 501 arranged on the outside and a hexagonal hole arranged on the inside. The contact points between the surfaces of the hexagonal hole are all transitioned through arcs.

[0078] The structure of the straightening block 7 is shown in the figure, wherein the top surface is an arc surface 701 , the bottom surface 702 is a plane, and a plurality of circular blind holes 703 are arranged on the bottom surface 702 .

[0079] Example 2

[0080] The present embodiment provides a method for using an adaptive sleeve driving device, which comprises the following steps in sequence:

[0081] Step 1, connecting the upper end of the adaptive casing driving device to the top drive protection joint;

[0082] Step 2: Use a top drive lifting ring and a casing elevator to lift a casing and keep the casing in a vertical state;

[0083] Step 3, using casing tongs to connect the lower end of the lifted casing with the casing string sitting at the wellhead;

[0084] Step 4, slowly lower the top drive until the lower end of the adaptive casing drive device enters into the collar of the lifting casing, and stop lowering;

[0085] Step 5: Start the top drive to slowly rotate forward, lower the top drive while rotating, and guide the buckle;

[0086] Step 6: After the threading is successful, back-clamp the hoisted casing and continue to rotate the top drive to make the threading until the specified threading torque is reached;

[0087] Step 7: Remove the backup clamp and wellhead casing elevator and start drilling;

[0088] Step 8: After a casing is driven, the casing string is placed on the wellhead through the casing elevator;

[0089] Step nine, put a back-up clamp on the coupling, start the top drive to reverse the buckle, until the buckle between the adaptive casing drive device and the completed casing is removed;

[0090] Repeat the process from step 2 to step 9.

[0091] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0092] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0093] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] Certain terms are used throughout this specification to refer to specific system components. As will be appreciated by those skilled in the art, different names may be used to refer to the same component, and thus this specification is not intended to distinguish between components that differ only in name and not in function. References to "one embodiment" or "an embodiment" in the specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the utility model. Therefore, the phrases "one embodiment" or "an embodiment" appearing in various places throughout the specification do not necessarily all refer to the same embodiment.

[0095] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0096] Although the preferred embodiments of the utility model have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and / or modifications that fall within the scope of the utility model, and changes and / or modifications made according to the embodiments of the utility model should be included within the scope of protection of the utility model.

Claims

1. An adaptive casing driving device, characterized in that: include: A double female short section (1), the upper end of the double female short section (1) being connected to a top drive; A stop nut (2) is arranged outside the double female nipple (1), and A mandrel (4) connected to the lower end of the double female short section (1), a buckle short section (5) being sleeved on the mandrel (4), and the buckle short section (5) being connected to a sleeve; Wherein, a buffer spring (3) is provided between the stop nut (2) and the belt buckle short section (5).

2. The adaptive sleeve driving device according to claim 1, characterized in that: A plurality of straightening blocks (7) are arranged at the lower part of the spindle (4) along the circumferential direction, and an elastic member is arranged on the inner side of the straightening blocks (7); The straightening block (7) is sleeved inside the casing, and the straightening block (7) supports the inner wall of the casing in the radial direction.

3. The adaptive sleeve driving device according to claim 2, characterized in that: The spindle (4) comprises a threaded section (404) connected to the double female short section (1), a buckle short section mounting section (403) is arranged below the threaded section (404), and the buckle short section (5) is slidably arranged on the buckle short section mounting section (403); A cylindrical section (407) is provided below the sliding section of the buckle short section (5), and a plurality of sink grooves (401) are provided on the cylindrical section (407). The sink grooves (401) are used to install the straightening block.

4. The adaptive sleeve driving device according to claim 3, characterized in that: The cross-section of the buckle short section installation section (403) is a polygonal structure, and a polygonal hole (502) is provided inside the buckle short section (5). The polygonal hole (502) is sleeved on the polygonal structure and transmits torque through the polygonal structure.

5. The adaptive sleeve driving device according to claim 4, characterized in that: The polygonal structure is a hexagonal column, and the polygonal hole (502) is a hexagonal hole.

6. The adaptive sleeve driving device according to claim 5, characterized in that: The sink groove (401) comprises a large rectangular groove, small rectangular grooves are respectively arranged on both sides of the large rectangular groove, and a plurality of sink holes (402) are also arranged at the bottom of the large rectangular groove.

7. The adaptive sleeve driving device according to claim 6, characterized in that: The straightening block (7) comprises an arc-shaped top surface and a flat bottom surface (702); a blind hole (703) corresponding to the countersunk hole (402) is provided on the bottom surface (702); Wherein, one end of the elastic member is confined in the blind hole (703), and the other end is confined in the countersunk hole (402).

8. The adaptive sleeve driving device according to claim 7, characterized in that: Protruding limiting plates are arranged on both sides of the straightening block (7); the main body of the straightening block is arranged in the large rectangular groove, and the limiting plates are arranged in the small rectangular groove.

9. The adaptive sleeve driving device according to claim 8, characterized in that: An upper pressing block (6) is arranged at the upper end of the straightening block (7), and a lower pressing block (9) is arranged at the lower end; the upper pressing block (6) and the lower pressing block (9) are respectively fixed in two small rectangular grooves and cover the limiting piece.

10. The adaptive sleeve driving device according to claim 9, characterized in that: An annular groove is provided on the inner side of the upper portion of the buckle short section (5), and a sealing step is provided in the annular groove; The buffer spring (3) is arranged in the annular groove.

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