Fastening device

Abstract

The utility model relates to a fastening device, relates to the technical field of workover treatment, and is used for solving the problems of inconvenience in disassembly and larger potential safety hazard in a pipe wrench fastening mode. Comprising a first clamping mechanism of which one end is provided with a first anti-rotation hole; a second anti-rotation hole is formed in one end of the second clamping mechanism, and the other end of the second clamping mechanism is pivotally connected with the other end of the first clamping mechanism; the first anti-rotation hole and the second anti-rotation hole can be arranged on the periphery of an object to be locked in a sleeving mode at the same time so that the object to be locked can be prevented from rotating in the first anti-rotation hole and the second anti-rotation hole, and the second clamping mechanism can apply rotating force to the object to be locked so that the object to be locked can be clamped in the first anti-rotation hole and the second anti-rotation hole. The second clamping mechanism can apply rotating force to the to-be-locked object, so that the to-be-locked object is always pressed on the inner wall surface of the first anti-rotating hole and the inner wall surface of the second anti-rotating hole. And therefore, a pipe wrench can be replaced for fastening, and the fastening efficiency of the downhole tool and the safety of fastening operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of well repair operations, in particular to a fastening device. Background Art

[0002] During coiled tubing construction, downhole tools need to be tightened on the ground. In the existing technology, two pipe clamps are usually used to tighten the backup clamps, and then a mechanical fall chain is used to connect the two prepared backup clamps for tightening. This tightening method has uncertain torque size, making it difficult to loosen the clamps during disassembly. There is also a safety hazard that the fall chain may suddenly slip and cause loosening, which may injure the tightening operator.

[0003] The above means that the method of tightening with a pipe wrench in the prior art is inconvenient to disassemble and has great potential safety hazards. Utility Model Content

[0004] The utility model provides a fastening device for solving the problems of inconvenient disassembly and great potential safety hazards in the fastening method using a pipe wrench.

[0005] The utility model provides a fastening device, comprising:

[0006] A first clamping mechanism, one end of which is disposed in the first anti-rotation hole; and

[0007] a second clamping mechanism, one end of which is provided with a second anti-rotation hole, and the other end of the second clamping mechanism is pivotally connected to the other end of the first clamping mechanism;

[0008] Among them, the first anti-rotation hole and the second anti-rotation hole can be simultaneously arranged on the outer circumference of the object to be locked, so as to prevent the object to be locked from rotating in the first anti-rotation hole and the second anti-rotation hole, and the second clamping mechanism can apply a rotational force to the object to be locked so that the object to be locked is clamped in the first anti-rotation hole and the second anti-rotation hole.

[0009] In one embodiment, the first clamping mechanism comprises:

[0010] Clamping pliers; and

[0011] An upper clamping fixed pliers, one end of which is pivotally connected to the upper clamping movable pliers, and the upper clamping fixed pliers and the upper clamping movable pliers are surrounded by a first anti-rotation hole; and

[0012] A movable locking pin, one end of which is pivotally connected to the upper clamp fixing clamp;

[0013] When the upper clamp fixed pliers rotates to the rotation position where the upper clamp fixed pliers and the upper clamp movable pliers form a first anti-rotation hole, the movable locking pin can rotate to the locking position to lock the rotation position of the upper clamp movable pliers.

[0014] In one embodiment, the first clamping mechanism further includes an axle pin, which is passed through the other end of the upper clamping clamp and the other end of the second clamping mechanism, and the first clamping mechanism is pivotally connected to the second clamping mechanism via the axle pin.

[0015] In one embodiment, a weight-reducing hole is provided on the upper clamp fixing clamp to reduce the weight of the upper clamp fixing clamp.

[0016] In one embodiment, the outline of the object to be locked is a hexagonal prism, and the first anti-rotation hole and the second anti-rotation hole are hexagonal holes that are compatible with the outer circumference of the hexagonal prism.

[0017] In one embodiment, the second clamping mechanism comprises:

[0018] A driving member having a fixed end and a driving end telescopically disposed within the fixed end, the fixed end being pivotally connected to the other end of the first clamping mechanism; and

[0019] A clamping assembly connected to the driving end;

[0020] Among them, a second anti-rotation hole is provided in the clamping assembly, and the driving end applies a rotational force to the object to be locked through the clamping assembly, so that the object to be locked is clamped in the first anti-rotation hole and the second anti-rotation hole.

[0021] In one embodiment, the driving member is a hydraulic cylinder or an electric push rod.

[0022] In one embodiment, the clamping assembly comprises:

[0023] a connector, one end of which is connected to the driving end; and

[0024] A torque transmission sleeve, which is pivotally connected to the other end of the connector, and a clamping hole is provided in the torque transmission sleeve for clamping the object to be locked; and

[0025] A clamping sleeve is provided on the torque transmission sleeve and is pivotally connected to the torque transmission sleeve. A second anti-rotation hole is provided in the clamping sleeve.

[0026] The driving end is used to push the torque transmission sleeve to rotate, so as to apply a rotational force to the object to be locked, so that the object to be locked is clamped in the first anti-rotation hole and the second anti-rotation hole.

[0027] In one embodiment, the torque transmission sleeve comprises:

[0028] lower left torque transfer sleeve; and

[0029] a lower right caliper pivotally connected to the lower left torque transfer sleeve; and

[0030] an inner fixing sleeve, which is disposed in a clamping hole formed by the lower left torque transmission sleeve and the lower right caliper; and

[0031] a connecting pin ear, which is provided on the lower left torque transmission sleeve and is used for pivotally connecting with the other end of the connecting head; and

[0032] A first locking pin is provided on the lower right caliper and the lower left torque transmission sleeve and is used to lock the clamping hole;

[0033] The inner fixing sleeve is a split structure, and the lower left torque transmission sleeve and the lower right caliper can apply radial force to the inner fixing sleeve to enable the inner fixing sleeve to hold the object to be locked.

[0034] In one embodiment, the clamping sleeve comprises:

[0035] lower left caliper; and

[0036] A lower right clamping sleeve, which is pivotally connected to the lower left caliper, and the lower right clamping sleeve and the lower left caliper are surrounded by a second anti-rotation hole; and

[0037] A second locking pin is provided on the lower left caliper and the lower right ferrule and is used to lock the second anti-rotation hole;

[0038] Wherein, the lower right clamping sleeve is pivotally connected to the torque transmission sleeve.

[0039] Compared with the prior art, the advantage of the present invention is that a first anti-rotation hole and a second anti-rotation hole are provided and sleeved on the outer periphery of the clamp of the object to be locked. The first anti-rotation hole and the second anti-rotation hole can simultaneously prevent the object to be locked from rotating. Moreover, the second clamping mechanism can apply a rotational force to the object to be locked, so that the object to be locked is always pressed against the inner wall surfaces of the first anti-rotation hole and the second anti-rotation hole. Thus, the locking function of the fastening device on the object to be locked is realized. In this way, the fastening device in the present application can replace the pipe clamp in the prior art for fastening, thereby avoiding the problems of inconvenient disassembly and greater safety hazards in the method of fastening with a pipe clamp. This thereby improves the fastening efficiency of on-site downhole tools and the safety of the fastening operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the fastening device in the embodiment of the utility model;

[0042] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the middle clamping assembly at one angle;

[0043] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the middle clamping assembly from another angle;

[0044] Figure 4 yes Figure 1 3D exploded view of the clamping assembly;

[0045] Figure 5 yes Figure 1 Schematic diagram of the connection relationship between the middle drive component and the connector.

[0046] Reference numerals:

[0047] 10. First clamping mechanism; 11. Upper clamping movable pliers; 12. Upper clamping fixed pliers; 121. Weight reduction hole; 13. Movable locking pin; 14. Axis pin; 15. First anti-rotation hole; 20. Second clamping mechanism; 21. Driving member; 211. Fixed end; 212. Driving end; 22. Clamping assembly; 221. Second anti-rotation hole; 222. Torque transmission sleeve; 2221. Lower left torque transmission sleeve; 2222. Lower right caliper; 2223. Inner fixed sleeve; 2224. Connecting pin ear; 2225. First locking pin; 2226. Clamping hole; 223. Clamping sleeve; 2231. Lower left caliper; 2232. Lower right clamping sleeve; 2233. Second locking pin; 224. Connecting head; 30. Third locking pin; 40. Connecting pin shaft. DETAILED DESCRIPTION

[0048] The present invention will be further described below with reference to the accompanying drawings.

[0049] It should be noted that the fastening device in this application is applied to the field of oil and gas well technology. The object to be fastened in this application is a downhole tool for a coiled tubing, and the fastening device in this application is used to fasten the downhole tool. Of course, the present invention is not limited to this, and the fastening device in this application can be applied to other fields.

[0050] like Figure 1 As shown, the present invention provides a fastening device, which includes a first clamping mechanism 10 and a second clamping mechanism 20. The first clamping mechanism 10 has one end disposed with a first anti-rotation hole 15; the second clamping mechanism 20 has one end disposed with a second anti-rotation hole 221, and the other end of the second clamping mechanism 20 is pivotally connected to the other end of the first clamping mechanism 10. The first anti-rotation hole 15 and the second anti-rotation hole 221 can be simultaneously sleeved on the outer circumference of an object to be locked, thereby preventing the object from rotating within the first anti-rotation hole 15 and the second anti-rotation hole 221. The second clamping mechanism 20 can apply a rotational force to the object to be locked, thereby clamping the object within the first anti-rotation hole 15 and the second anti-rotation hole 221.

[0051] In the above arrangement, a first anti-rotation hole 15 and a second anti-rotation hole 221 are provided and sleeved on the outer periphery of the object to be locked. The first anti-rotation hole 15 and the second anti-rotation hole 221 can simultaneously prevent the object to be locked from rotating. Moreover, the second clamping mechanism 20 can apply a rotational force to the object to be locked, so that the object to be locked is always pressed against the inner wall surfaces of the first anti-rotation hole 15 and the second anti-rotation hole 221. This realizes the locking function of the fastening device on the object to be locked. In this way, the fastening device in the present application can replace the pipe clamp in the prior art for fastening, thereby avoiding the problems of inconvenient disassembly and greater safety hazards in the method of fastening with a pipe clamp. This improves the fastening efficiency of on-site downhole tools and the safety of the fastening operation.

[0052] It should be noted that the inner wall surfaces of the first anti-rotation hole 15 and the second anti-rotation hole 221 are limit surfaces, and the limit surfaces are in contact with the outer peripheral surface of the object to be locked to achieve the locking function of the fastening device on the object to be locked. Figures 1 to 4 As shown, in one embodiment, the first clamping mechanism 10 includes an upper clamping movable clamp 11, an upper clamping fixed clamp 12, and a movable locking pin 13. The upper clamping fixed clamp 12 is pivotally connected at one end to the upper clamping movable clamp 11, and the upper clamping fixed clamp 12 and the upper clamping movable clamp 11 are arranged to form a first anti-rotation hole 15; the movable locking pin 13 is pivotally connected at one end to the upper clamping fixed clamp 12; when the upper clamping fixed clamp 12 is rotated to a rotation position where the upper clamping fixed clamp 12 and the upper clamping movable clamp 11 are arranged to form the first anti-rotation hole 15, the movable locking pin 13 can be rotated to a locking position to lock the upper clamping movable clamp 11 in the rotation position.

[0053] In the above arrangement, the movable locking pin 13 can lock the first anti-rotation hole 15, that is, ensure that the first anti-rotation hole 15 does not deform, thereby ensuring the anti-rotation function of the first anti-rotation hole 15 and further ensuring that the locking function of the fastening device is achieved.

[0054] Specifically, if Figures 1 to 3 As shown, in one embodiment, the first clamping mechanism 10 further includes an axle pin 14, which is passed through the other end of the upper clamping clamp 12 and the other end of the second clamping mechanism 20, and the first clamping mechanism 10 is pivotally connected to the second clamping mechanism 20 through the axle pin 14.

[0055] Specifically, if Figure 1 As shown, in one embodiment, the upper clamp 12 is provided with a weight-reducing hole 121 for reducing the weight of the upper clamp 12. This reduces the overall weight of the fastening device, thereby facilitating its transport and improving its ease of use.

[0056] It should be noted that the size and shape of the weight-reducing hole 121 cannot affect the structural strength of the upper clamp 12 .

[0057] Of course, according to actual conditions, the upper clamp fixing clamp 12 can be made of lightweight materials, such as aluminum alloy.

[0058] Specifically, if Figures 1 to 4 As shown, in one embodiment, the outline of the object to be locked is a hexagonal prism, and the first anti-rotation hole 15 and the second anti-rotation hole 221 are hexagonal holes that are compatible with the outer periphery of the hexagonal prism.

[0059] It should be noted that the shapes of the first anti-rotation hole 15 and the second anti-rotation hole 221 are adapted to the outline of the locking object. For example, if the outline of the locking object is a quadrilateral, the first anti-rotation hole 15 and the second anti-rotation hole 221 are also quadrilateral. If the outline of the locking object is an octagon, the first anti-rotation hole 15 and the second anti-rotation hole 221 are also octagonal.

[0060] Specifically, if Figure 1 and Figure 5 As shown, in one embodiment, the second clamping mechanism 20 includes a driving member 21 and a clamping assembly 22. The driving member 21 has a fixed end 211 and a driving end 212 telescopically disposed within the fixed end 211, wherein the fixed end 211 is pivotally connected to the other end of the first clamping mechanism 10; the clamping assembly 22 is connected to the driving end 212; the clamping assembly 22 is provided with a second anti-rotation hole 221, and the driving end 212 applies the rotational force to the object to be locked through the clamping assembly 22, so that the object to be locked is clamped in the first anti-rotation hole 15 and the second anti-rotation hole 221.

[0061] Specifically, if Figure 1 and Figure 5 As shown, in one embodiment, the driving member 21 is a hydraulic cylinder. Of course, in an alternative embodiment not shown in the drawings of the present application, the driving member 21 can be an electric push rod.

[0062] Specifically, if Figures 1 to 4As shown, in one embodiment, the clamping assembly 22 includes a connector 224, a torque transmission sleeve 222, and a clamping sleeve 223. The connector 224 is connected to the driving end 212 at one end; the torque transmission sleeve 222 is pivotally connected to the other end of the connector 224, and a clamping hole 2226 is provided in the torque transmission sleeve 222 for clamping the object to be locked; the clamping sleeve 223 is provided on the torque transmission sleeve 222 and pivotally connected to the torque transmission sleeve 222, and a second anti-rotation hole 221 is provided in the clamping sleeve 223; the driving end 212 is used to push the torque transmission sleeve 222 to rotate, so as to apply the rotational force to the object to be locked, so that the object to be locked is clamped in the first anti-rotation hole 15 and the second anti-rotation hole 221.

[0063] Specifically, if Figures 1 to 4 As shown, in one embodiment, the torque transmission sleeve 222 includes a lower left torque transmission sleeve 2221 , a lower right caliper 2222 , an inner fixing sleeve 2223 and a connecting pin ear 2224 . Among them, the lower right caliper 2222 is pivotally connected to the lower left torque transmission sleeve 2221; the inner fixed sleeve 2223 is arranged in the clamping hole surrounded by the lower left torque transmission sleeve 2221 and the lower right caliper 2222; the connecting pin ear 2224 is arranged on the lower left torque transmission sleeve 2221, and is used to be pivotally connected to the other end of the connecting head 224; the first locking pin 2225 is passed through the lower right caliper 2222 and the lower left torque transmission sleeve 2221, and is used to lock the clamping hole; the inner fixed sleeve 2223 is a split structure, and the lower left torque transmission sleeve 2221 and the lower right caliper 2222 can apply radial force to the inner fixed sleeve 2223 so that the inner fixed sleeve 2223 holds the object to be locked.

[0064] Specifically, if Figures 1 to 4 As shown, in one embodiment, the clamping sleeve 223 includes a lower left caliper 2231, a lower right clasp 2232, and a second locking pin 2233. The lower right clasp 2232 is pivotally connected to the lower left caliper 2231, and the lower right clasp 2232 and the lower left caliper 2231 enclose the second anti-rotation hole 221; the second locking pin 2233 is passed through the lower left caliper 2231 and the lower right clasp 2232 to lock the second anti-rotation hole 221; the lower right clasp 2232 is pivotally connected to the torque transmission sleeve 222.

[0065] Specifically, if Figures 1 to 3As shown, in one embodiment, a third locking pin 30 is further included. The third locking pin 30 is disposed through the lower left caliper 2231 and the lower right ferrule 2232 to achieve a pivotal connection between the lower left caliper 2231 and the lower right ferrule 2232. Simultaneously, the third locking pin 30 is disposed through the lower right caliper 2222 and the lower left torque transmission sleeve 2221 to provide a pivotal connection between the lower right caliper 2222 and the lower left torque transmission sleeve 2221. Furthermore, the third locking pin 30 also achieves a pivotal connection between the lower right ferrule 2232 and the torque transmission sleeve 222.

[0066] It should be noted that, in this application, connecting pins 40 are provided at the connection between the lower right caliper 2222 and the lower left torque transmission sleeve 2221, at the connection between the lower left caliper 2231 and the lower right clasp 2232, and at the connection between the connecting head 224 and the torque transmission sleeve 222 to achieve pivotal connection.

[0067] The following combination Figures 1 to 5 Explain the method of using the fastening device in this application:

[0068] All the jaws of the device can be opened by means of the movable locking pin and the locking pin (including the first and third locking pins), and after opening, they are inserted into the joint (male and female connection parts) of the downhole tool of the coiled tubing to be buckled or unbuckled. The upper clamping fixed clamp is clamped on the fixed body of the coiled tubing, and then the jaws are locked; then the two lower jaws are opened and inserted into the downhole tool body. Both jaws have an inner hexagonal structure surface, which matches the hexagonal surface of the fixed body to be buckled and the body of the downhole tool to be connected (such as Figure 1 (The figure shows the closed state of the fastening operation.) During operation, connect the working hydraulic line to the oil inlet of the hydraulic cylinder. Operate the hydraulic oil to move the connector to the right, thereby pushing the lower clamping assembly to rotate, thus realizing the fastening function.

[0069] It can be seen from the description of the specific embodiment above that the first anti-rotation hole and the second anti-rotation hole are provided and sleeved on the outer periphery of the object to be locked. The first anti-rotation hole and the second anti-rotation hole can simultaneously prevent the object to be locked from rotating. Moreover, the second clamping mechanism can apply a rotational force to the object to be locked, so that the object to be locked is always pressed against the inner wall surfaces of the first anti-rotation hole and the second anti-rotation hole. Thereby, the locking function of the fastening device on the object to be locked is realized. In this way, the fastening device in the present application can replace the pipe clamp in the prior art for fastening, thereby avoiding the problems of inconvenient disassembly and greater safety hazards in the method of fastening with a pipe clamp. This thereby improves the fastening efficiency of on-site downhole tools and the safety of the fastening operation.

[0070] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A fastening device, characterized in that: include: A first clamping mechanism, one end of which is arranged in the first anti-rotation hole; as well as A second clamping mechanism, one end of which is provided with a second anti-rotation hole, and the other end of the second clamping mechanism is pivotally connected to the other end of the first clamping mechanism; Among them, the first anti-rotation hole and the second anti-rotation hole can be simultaneously arranged on the outer circumference of the object to be locked, so as to prevent the object to be locked from rotating in the first anti-rotation hole and the second anti-rotation hole, and the second clamping mechanism can apply a rotational force to the object to be locked so that the object to be locked is clamped in the first anti-rotation hole and the second anti-rotation hole.

2. The fastening device according to claim 1, characterized in that: The first clamping mechanism comprises: Upper clamp movable pliers; and An upper clamp fixed pliers, one end of which is pivotally connected to the upper clamp movable pliers, the upper clamp fixed pliers and the upper clamp movable pliers are arranged to form the first anti-rotation hole; and A movable locking pin, one end of which is pivotally connected to the upper clamp fixing clamp; When the upper clamp fixed pliers rotates to the rotation position where the upper clamp fixed pliers and the upper clamp movable pliers surround the first anti-rotation hole, the movable locking pin can rotate to the locking position to lock the rotation position of the upper clamp movable pliers.

3. The fastening device according to claim 2, characterized in that: The first clamping mechanism further comprises an axle pin, the axle pin is passed through the other end of the upper clamping pliers and the other end of the second clamping mechanism, and the first clamping mechanism is pivotally connected to the second clamping mechanism via the axle pin.

4. The fastening device according to claim 2, characterized in that: The upper clamp fixing clamp is provided with a weight-reducing hole for reducing the weight of the upper clamp fixing clamp.

5. The fastening device according to claim 1, characterized in that: The outline of the object to be locked is a hexagonal prism, and the first anti-rotation hole and the second anti-rotation hole are hexagonal holes that are compatible with the outer periphery of the hexagonal prism.

6. The fastening device according to any one of claims 1 to 5, characterized in that: The second clamping mechanism comprises: A driving member having a fixed end and a driving end telescopically disposed inside the fixed end, wherein the fixed end is pivotally connected to the other end of the first clamping mechanism; and A clamping assembly connected to the driving end; Wherein, the second anti-rotation hole is provided in the clamping assembly, and the driving end applies the rotational force to the object to be locked through the clamping assembly so that the object to be locked is clamped in the first anti-rotation hole and the second anti-rotation hole.

7. The fastening device according to claim 6, characterized in that: The driving member is a hydraulic cylinder or an electric push rod.

8. The fastening device according to claim 6, characterized in that: The clamping assembly comprises: A connector, one end of which is connected to the driving end; and A torque transmission sleeve, which is pivotally connected to the other end of the connector, and a clamping hole is provided in the torque transmission sleeve for clamping the object to be locked; and A clamping sleeve, which is arranged on the torque transmission sleeve and is pivotally connected to the torque transmission sleeve, and the second anti-rotation hole is arranged in the clamping sleeve; Wherein, the driving end is used to push the torque transmission sleeve to rotate so as to apply the rotational force to the object to be locked, so that the object to be locked is clamped in the first anti-rotation hole and the second anti-rotation hole.

9. The fastening device according to claim 8, characterized in that: The torque transmission sleeve comprises: lower left torque transfer sleeve; and a lower right caliper pivotally connected to the lower left torque transfer sleeve; and an inner fixing sleeve, which is disposed in a clamping hole formed by the lower left torque transmission sleeve and the lower right caliper; and a connecting pin ear, which is arranged on the lower left torque transmission sleeve and is used for pivotally connecting with the other end of the connecting head; and A first locking pin, which is passed through the lower right caliper and the lower left torque transmission sleeve and is used to lock the clamping hole; Wherein, the inner fixed sleeve is a split structure, and the lower left torque transmission sleeve and the lower right caliper can apply radial force to the inner fixed sleeve so that the inner fixed sleeve tightly embraces the object to be locked.

10. The fastening device according to claim 8, characterized in that: The clamping sleeve comprises: lower left caliper; and A lower right clamping sleeve, which is pivotally connected to the lower left caliper, and the lower right clamping sleeve and the lower left caliper are arranged to form the second anti-rotation hole; and A second locking pin, which is passed through the lower left caliper and the lower right ferrule and is used to lock the second anti-rotation hole; Wherein, the lower right clamping sleeve is pivotally connected to the torque transmission sleeve.

Images