Dismounting device for dismounting annular slip ring in drill collar

Abstract

The utility model provides a dismounting device used for dismounting an annular slip ring in a drill collar, a groove used for placing the annular slip ring is formed on the free end face of the drill collar, a first threaded hole is arranged on the end face of the annular slip ring, the device comprises a chuck used for being sleeved on the free end of the drill collar, and a first threaded hole is arranged on the chuck. A first threaded hole is formed in the annular slip ring, a chuck is arranged in the annular slip ring, a sleeve is arranged on the chuck, a first screw is arranged in the sleeve, the first screw can penetrate through the sleeve and is connected with the first threaded hole of the annular slip ring, and the device further comprises a driving mechanism used for ejecting the annular slip ring out of the drill collar. Under the arrangement mode, the annular slip ring can be disassembled by screwing the driving mechanism. In this way, the technical problem that in the prior art, when the annular sliding ring is detached, the annular sliding ring is prone to being damaged is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of annular slip ring disassembly, and in particular relates to a disassembly device for disassembling annular slip ring inside a drill collar. Background Art

[0002] With the development of oil development technology, conventional oil and gas resources are gradually decreasing, and the exploitation of unconventional resources such as shale gas and tight gas is gradually expanding. Due to the deep burial of shale gas and tight gas, the trajectory control of unconventional development wells such as shale gas and tight gas is difficult, the underground conditions are complex, and the drilling cycle is long, which greatly restricts the development of unconventional oil and gas resources.

[0003] Therefore, when exploiting unconventional resources such as shale gas and tight gas, it is generally necessary to install a geosteering tool on the development setting. The geosteering tool can monitor downhole parameters in real time, thereby adjusting the well inclination and azimuth in real time to ensure a greater penetration rate of the reservoir and promote the efficient development of unconventional resources.

[0004] With the widespread use of geosteering tools, the workload of replacing geosteering tools has also increased significantly, especially the replacement of annular slip rings. In the prior art, annular slip rings are generally embedded in the grooves of drill collars. After long-term use, the metal surface of the annular slip rings will wear and become thinner, affecting the communication of the rotating geosteering tools, so the annular slip rings must be replaced regularly. In the prior art, the annular slip rings are generally pried out of the drill collars by tools such as awls, thereby replacing the annular slip rings.

[0005] Although the above operation can replace the annular slip ring, the operation is inconvenient. Meanwhile, in the process of prying out the annular slip ring, the annular slip ring is easily damaged. Utility Model Content

[0006] In order to overcome at least one or more of the above-mentioned defects in the prior art, the utility model provides a disassembly device for disassembling an annular slip ring in a drill collar, wherein a groove for placing the annular slip ring is formed on the free end surface of the drill collar, and a first threaded hole is provided on the end surface of the annular slip ring.

[0007] The device comprises a chuck for sleeved at the free end of the drill collar, a sleeve is arranged on the chuck, a first screw is arranged in the sleeve, and the first screw can pass through the sleeve and be connected with the first threaded hole of the annular slip ring.

[0008] The device also includes a driving mechanism for ejecting the annular slip ring from the drill collar.

[0009] In one embodiment, the driving mechanism comprises at least one second threaded hole disposed on the chuck, and a second screw capable of extending through the second threaded hole to abut against a free end surface of the drill collar.

[0010] In one embodiment, the chuck includes a bottom wall and a side wall extending from the bottom wall to one side, the side wall can be sleeved on the free end of the drill collar and together with the bottom wall form a chamber adapted to the drill collar and the free end.

[0011] In one embodiment, the sleeve includes a base and a receiving portion disposed on the base and extending away from the base, the base is provided with a third threaded hole for cooperating with the first screw, and the receiving portion is configured to have a diameter larger than the smooth hole of the first screw.

[0012] In one embodiment, the sleeve further comprises a clamping portion which is recessed inwardly along the circumference of the accommodation portion and is used for clamping on the chuck.

[0013] In one embodiment, four sleeves are evenly distributed on the chuck along the circumference.

[0014] In one embodiment, four second threaded holes are evenly distributed on the chuck along the circumferential direction, and a second screw is disposed in each second threaded hole.

[0015] In one embodiment, the second screw is a hand screw, comprising a spiral portion adapted to the second threaded hole, one end of the spiral portion abuts against the drill collar, and the other end forms a force-applying end.

[0016] In one embodiment, the axial length of the spiral portion is greater than the axial length of the annular slip ring.

[0017] In one embodiment, the second threaded hole is disposed radially outside the sleeve.

[0018] In general, the above technical solutions conceived by the utility model can achieve at least the following beneficial effects compared with the prior art:

[0019] 1. The disassembly device for disassembling the annular slip ring in the drill collar of the utility model is provided with a chuck, a sleeve located on the chuck and capable of being inserted into the groove, and a first screw inserted into the sleeve and adapted to the first threaded hole at the end of the annular slip ring, so that the first screw can pass through the sleeve and connect with the annular slip ring, so that the annular slip ring and the first screw are arranged on the chuck together, and then the annular slip ring can be disassembled by disassembling the chuck. In this way, the technical problem that the annular slip ring is easily damaged when disassembling it in the prior art is solved.

[0020] 2. The disassembly device for disassembling the annular slip ring in the drill collar of the utility model is provided with a second threaded hole on the chuck and a second screw matched with the second threaded hole, so that the chuck can be driven to move along the axial direction by screwing the second screw, thereby removing the annular slip ring or installing the annular slip ring. In this way, the technical problem of inconvenient disassembly of the annular slip ring in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0022] Figure 1 The overall structure of the disassembly device for disassembling the inner annular slip ring of the drill collar according to the utility model is schematically shown;

[0023] Figure 2 The schematic diagram shows the main structure of the chuck of the disassembly device for disassembling the inner annular slip ring of the drill collar according to the utility model;

[0024] Figure 3 The overall structure of the sleeve of the disassembly device for disassembling the inner annular slip ring of the drill collar according to the utility model is schematically shown.

[0025] It should be noted that the drawings are not necessarily drawn according to actual scale.

[0026] In all the accompanying drawings, the same figure marks represent the same technical features, specifically: 100-disassembly device for disassembling the annular slip ring inside the drill collar; 1-drill collar; 11-groove; 2-annular slip ring; 3-chuck; 31-bottom wall; 32-side wall; 33-casing; 331-base; 3311-third threaded hole; 332-accommodating portion; 333-engaging portion; 34-second threaded hole; 4-first screw; 5-second screw; 51-spiral portion; 52-handle. DETAILED DESCRIPTION

[0027] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a disassembly device for disassembling an annular slip ring inside a drill collar according to the utility model in conjunction with the accompanying drawings.

[0028] For convenience, the direction along which the drill collar extends is referred to as “axial” or similar terms, and the direction perpendicular to the “axial” is referred to as “radial” or similar terms.

[0029] like Figure 1As shown, the drill collar 1 used in the development process of oil and natural gas is usually configured as a columnar structure. Among them, a groove 11 is formed on the end face of the free end of the drill collar 1, and the annular slip ring 2 can be placed in the groove 11. At the same time, a first threaded hole is provided on the end face of the annular slip ring 2. In this way, when the drill collar 1 is moving, it can drive the annular slip ring 2 to move synchronously. During the movement, the annular slip ring 2 can monitor the downhole parameters in real time, so as to adjust the well inclination and azimuth in real time. In this way, a greater penetration rate of the reservoir can be guaranteed, and the efficient development of unconventional resources can be improved. These structures of the drill collar 1 and the annular slip ring 2 are well known to technicians in this field.

[0030] Figure 1 The overall structure of the disassembly device 100 for disassembling the inner annular slip ring of the drill collar according to the utility model is schematically shown. Figure 1 In the illustrated embodiment, the disassembly device 100 for disassembling the inner annular slip ring of the drill collar comprises a chuck 3 for sleeved at the free end of the drill collar 1, and the chuck 3 is configured to be adapted to the free end of the drill collar 1. The chuck 3 comprises a bottom wall 31 and a side wall 32 extending to one side from the bottom wall 31. The side wall 32 can be sleeved at the free end of the drill collar 1, and together with the bottom wall 31, form a chamber adapted to the free end of the drill collar 1.

[0031] In one embodiment, Figure 2 As shown, at least one sleeve 33 capable of being inserted into the groove 11 is movably provided at a position corresponding to the groove 11 on the chuck 3, and a first screw 4 is provided in the sleeve 33. The first screw 4 is adapted to the first threaded hole at the end of the annular slip ring 2. Thus, the first screw 4 can pass through the sleeve 33 and be connected to the annular slip ring 2. In this way, the annular slip ring 2 and the first screw 4 can form a relatively fixed integrated structure, so that they are stably provided on the chuck 3 together.

[0032] In this arrangement, when in use, the annular slip ring 2 is placed in the groove 11, and the chuck 3 is buckled on the free end of the drill collar 1. Then, the chuck 3 is adjusted so that the sleeve 33 on the chuck 3 corresponds to the groove 11. At the same time, the first screw 4 is screwed in along the sleeve 33 so that the first screw 4 can be connected to the annular slip ring 2, and then the annular slip ring 2 and the first screw 4 form an integrated structure and are jointly arranged on the chuck 3.

[0033] In one embodiment, Figure 1 As shown, the device 100 further comprises a driving mechanism for ejecting the annular slip ring 2 from the drill collar 1. The driving mechanism comprises at least one second threaded hole 34 provided on the chuck 3, and a second screw 5 capable of extending through the second threaded hole 34 and abutting against the free end surface of the drill collar 1.

[0034] According to a preferred embodiment of the present utility model, Figure 1 As shown, the second screw 5 is configured as a hand screw. Specifically, the second screw 5 is configured as a structure suitable for manual screwing by a worker. In this embodiment, the hand screw includes a spiral portion 51 adapted to the second threaded hole 34, one end of the spiral portion 51 abuts against the drill collar 1, and the other end extends outward along the second threaded hole 34 to form a force-applying end.

[0035] The axial length of the spiral portion 51 is greater than the axial length of the annular slip ring 2. In this way, when the chuck 3 moves to the end of the spiral portion 51, the relative distance between the chuck 3 and the free end of the drill collar 1 can be greater than the axial distance of the annular slip ring 2, which facilitates the installation and removal of the annular slip ring 2.

[0036] In this arrangement, when the annular slip ring 2 needs to be removed from the groove 11, the force-applying end is screwed to rotate the spiral portion 51. Since the spiral portion 51 is in contact with the drill collar 1, the spiral portion 51 cannot move close to the drill collar 1 during the rotation process. As the spiral portion 51 continues to rotate, the threads on the spiral portion 51 will continue to mesh with the threads on the second threaded hole 34.

[0037] During this process, the chuck 3 will continue to move axially as the spiral portion 51 rotates, until the chuck 3 moves in a direction away from the free end of the drill collar 1 to a position convenient for removing the annular slip ring 2. Thus, the annular slip ring 2 can be removed from the groove 11.

[0038] When the annular slip ring 2 needs to be installed in the groove 11, the force-applying end is screwed in the direction opposite to the above-mentioned screwing direction. During the continuous rotation of the spiral portion 51, the thread on the threaded hole 34 will continuously engage with the spiral portion 51, and the chuck 3 will continuously move along the position close to the free end of the drill collar 1, thereby driving the annular slip ring 2 on the chuck 3 to continuously enter the groove 11. In this way, the annular slip ring 2 can be installed in the groove 11.

[0039] In one embodiment, Figure 3 As shown, the sleeve 33 includes a base 331 and a receiving portion 332 disposed on the base 331 and extending toward one side of the base 331. The base 331 is provided with a third threaded hole 3311 that cooperates with the first screw 4, and the receiving portion 332 is configured as a light hole with a diameter larger than that of the first screw 4. In this way, the connection of the annular slip ring 2 can be further strengthened.

[0040] In this arrangement, when in use, the first screw 4 is screwed in along the third threaded hole 3311 on the base 331, and as the first screw 4 continues to move along the accommodating portion 332, the first screw 4 will be connected to the annular slip ring 2. At the same time, the first screw 4 can also be relatively fixed to the sleeve 33 through the third threaded hole 3311. In this arrangement, the annular slip ring 2 and the sleeve 33 can further form an integrated structure that is jointly arranged on the chuck 3, further increasing the stability of the connection of the annular slip ring 2.

[0041] In one embodiment, Figure 3 As shown, the sleeve 33 also includes a clamping portion 333 formed by being recessed inwardly along the circumference of the accommodation portion 332 and used for clamping on the chuck 3. In this way, the sleeve 33 can be clamped on the chuck 3. At the same time, the sleeve 33 can also rotate along the position where it is clamped with the chuck 3.

[0042] According to a preferred embodiment of the present utility model, Figure 2 As shown, four sleeves 33 are arranged and evenly distributed on the chuck 3 along the circumferential direction. Specifically, four sleeves 33 are arranged on the chuck 3 in pairs. In this way, each sleeve 33 can be arranged in the groove 11 on the drill collar 1 for connecting the annular slip ring 2.

[0043] According to a preferred embodiment of the utility model, four second threaded holes 34 are arranged on the chuck 3 along the circumference, and the four threaded holes 34 are evenly distributed on the chuck 3. Specifically, the four second threaded holes 34 are arranged on the chuck 3 in a manner of being opposite to each other. A second screw 5 is arranged in each of the second threaded holes 34. In this arrangement, when the chuck 3 needs to move axially, the four second screws 5 can be screwed synchronously, so that the chuck 3 can stably move along the threads on the surfaces of the second screws 5. As a result, the stability of the movement of the chuck 3 is increased.

[0044] In one embodiment, the second threaded hole 34 is arranged radially outside the sleeve 33. In this way, interference between the second screw 5 and the sleeve 33 can be avoided.

[0045] According to a preferred embodiment of the present utility model, Figure 1 As shown, a handle 52 is provided on the force-applying end of the spiral portion 51 , and the handle 52 is used to provide a force fulcrum for the screwing portion 51 , so that the screwing portion 51 can be driven to move synchronously by applying a force to the handle 52 .

[0046] According to a preferred embodiment of the present invention, a rubber layer is provided on the outer periphery of the handle 52, and a plurality of lines are formed on the surface of the rubber layer. In this way, the friction force when the handle 52 is screwed can be increased, so that the force of screwing the handle 52 can be continuously transmitted to the spiral portion 51, thereby driving the chuck 3 to move.

[0047] The operation of the disassembly device 100 for disassembling the inner annular slip ring of a drill collar according to the present invention is as follows.

[0048] The handle 52 is screwed to move the spiral portion 51, thereby driving the chuck 3 to move in a direction away from the free end of the drill collar 1 until the relative distance between the chuck 3 and the free end of the drill collar 1 is suitable for installing the annular slip ring 2 or removing the annular slip ring 2.

[0049] When the annular slip ring needs to be installed, first, the slip ring 2 is set in the groove 11. The chuck 3 is sleeved on the free end of the drill collar 1 so that the four sleeves 33 on the chuck 3 correspond to the groove 11.

[0050] Then, the first screw 4 is screwed into the third threaded hole 3311 on the base 331. As the first screw 4 continues to move along the receiving portion 332, the first screw 4 is connected to the annular slip ring 2. At the same time, the first screw 4 can also be relatively fixed with the sleeve 33. In this arrangement, the annular slip ring 2 and the sleeve 33 can form an integrated structure that is jointly arranged on the chuck 3.

[0051] Finally, the handle 52 is screwed in the direction opposite to the above direction, so that the screwing part 51 drives the chuck 3 to move in the direction close to the free end of the drill collar 1 until the annular slip ring 2 is located at a suitable position in the groove 11. Thus, the installation of the annular slip ring 2 is completed.

[0052] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A disassembly device for disassembling an annular slip ring inside a drill collar, wherein: A groove (11) for accommodating an annular slip ring (2) is formed on the free end surface of the drill collar (1), and a first threaded hole is provided on the end surface of the annular slip ring (2). The device is characterized in that the device comprises a chuck (3) for sleeved on the free end of the drill collar (1), a sleeve (33) is arranged on the chuck (3), a first screw (4) is arranged in the sleeve (33), and the first screw (4) can pass through the sleeve (33) and be connected to the first threaded hole of the annular slip ring (2). The device also comprises a driving mechanism for ejecting the annular slip ring (2) from the drill collar (1).

2. The disassembly device for disassembling the inner annular slip ring of the drill collar according to claim 1, characterized in that: The driving mechanism comprises at least one second threaded hole (34) arranged on the chuck (3), and a second screw (5) capable of extending through the second threaded hole (34) to abut against the free end surface of the drill collar (1).

3. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 2, characterized in that: The chuck (3) comprises a bottom wall (31) and a side wall (32) extending from the bottom wall (31) to one side, wherein the side wall (32) can be sleeved on the free end of the drill collar and together with the bottom wall (31) form a chamber adapted to fit the drill collar (1) and the free end.

4. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 3, characterized in that: The sleeve (33) includes a base (331) and a receiving portion (332) arranged on the base (331) and extending away from the base (331), the base (331) is provided with a third threaded hole (3311) for cooperating with the first screw (4), and the receiving portion (332) is constructed as a light hole with a diameter larger than that of the first screw (4).

5. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 4, characterized in that: The sleeve (33) further comprises a clamping portion (333) which is recessed inwardly along the circumference of the accommodation portion (332) and is used for clamping onto the chuck (3).

6. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 5, characterized in that: The four sleeves (33) are evenly distributed on the chuck (3) along the circumferential direction.

7. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 6, characterized in that: Four second threaded holes (34) are evenly distributed on the chuck (3) along the circumferential direction, and a second screw (5) is arranged in each second threaded hole (34).

8. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 7, characterized in that: The second screw (5) is a hand-tightened screw, comprising a spiral portion (51) adapted to the second threaded hole (34); one end of the spiral portion (51) abuts against the drill collar (1), and the other end forms a force-applying end.

9. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 8, characterized in that: The axial length of the spiral portion (51) is greater than the axial length of the annular slip ring (2).

10. The disassembly device for disassembling the inner annular slip ring of a drill collar according to claim 9, characterized in that: The second threaded hole (34) is arranged radially outside the sleeve (33).

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