Petroleum pipe reversing device

Abstract

The utility model provides a petroleum pipe tool back-off device which comprises a bushing and a pipe holding mechanism, the pipe holding mechanism and the bushing are coaxially connected and circumferentially fixed, the bushing is used for being installed in a rotating disc in a matched mode, and the pipe holding mechanism is used for clamping a petroleum pipe tool and circumferentially fixed to the petroleum pipe tool. And the bushing can rotate under the driving of the turntable, so that the pipe holding mechanism can drive the petroleum pipe to perform back-off operation. The petroleum pipe back-off device has the advantages that through the bushing and the pipe holding mechanism which are coaxially connected, the petroleum pipe back-off device can be driven by the rotating disc to tightly hold a petroleum pipe to conduct back-off operation.

Description

[0001] The present utility model claims the priority of Chinese patent application CN202420642687.8, entitled “Petroleum Pipe Inverted Device”, filed on March 29, 2024, and the entire contents of the above application are incorporated herein by reference. Technical Field

[0002] The utility model relates to the technical field of oil and gas field well repair equipment, in particular to a petroleum pipe undercut device. Background Art

[0003] In oil well repair operations, side drilling, and drilling construction, drill bit jams often occur due to complex situations in the well. At this time, the drill bit is in the well or the square drill rod has been raised above the turntable surface. It is impossible to directly rotate the oil pipe to unblock it by rotating the turntable, which makes it difficult to handle. The previous treatment method was to use a simple buckler. During operation, two pipe clamps were used to bite the pipe column, and the pipe clamp was fixed on the simple buckler. One end of the wire rope was wrapped around the simple buckler and the other end was fixed on the square bushing. Then the square bushing was rotated by the turntable, so that the wrapped wire rope pulled the simple buckler to rotate and drive the pipe clamp to hold the pipe column and rotate, thereby realizing the buckling operation. However, due to the large torque when the oil pipe is buckled, the rope drum will be deformed due to the large torque, and the strong torque will easily cause the pipe clamp teeth to slip, the pipe clamp handle to break, and the wire rope to break. The counter-torque will cause the pipe clamp to be thrown out, directly endangering the life and safety of the operator. Therefore, the previous treatment method has a low success rate, and is prone to cause injury or equipment damage, and there are great safety hazards.

[0004] Therefore, it is necessary to study a petroleum pipe undercut device to solve the above problems or alleviate the impact of the above problems. Utility Model Content

[0005] The utility model provides a petroleum pipe undercut device, which can hold the petroleum pipe tightly to perform undercut operation under the drive of a rotating plate through a coaxially connected bushing and a pipe holding mechanism.

[0006] The utility model discloses a petroleum pipe undercut device, which comprises a bushing and a pipe holding mechanism, wherein the pipe holding mechanism is coaxially connected with the bushing and the two are circumferentially fixed, the bushing is used for matching and installing in a rotating disk, and the pipe holding mechanism is used for clamping the petroleum pipe and is circumferentially fixed with the petroleum pipe; the bushing can rotate under the drive of the rotating disk, so that the pipe holding mechanism can drive the petroleum pipe to perform an undercut operation.

[0007] In one embodiment, the pipe holding mechanism includes a slip tooth and a socket sleeve, the slip tooth is located in the socket sleeve and the two are circumferentially fixed, the slip tooth is used to clamp the oil pipe, and the socket sleeve is used to connect with the core packing.

[0008] In one embodiment, the slip teeth are of an elliptical ring structure, and the inner ring of the tooth seat sleeve is of an elliptical structure matching the outer ring of the slip teeth.

[0009] In one embodiment, the slip teeth are formed by buckling two half slips of the same structure, and the tooth seat sleeve is formed by buckling two half tooth seats of the same structure.

[0010] In one embodiment, the socket sleeve is connected to the bushing via a connecting column, the length direction of the connecting column is arranged along the axial direction of the oil pipe, one end of the connecting column is fixed to the bushing, and the other end passes through the socket sleeve and is fastened by a fixing member.

[0011] In one embodiment, the engaging end surfaces of the two half slips are provided with connecting holes corresponding to each other, and the two half slips can be connected by fixing pins passing through the connecting holes.

[0012] In one embodiment, a first protective baffle is provided between the pipe holding mechanism and the bushing, and a second protective baffle is provided at the end of the pipe holding mechanism away from the bushing, and the first protective baffle and the second protective baffle cooperate to limit the position of the slip teeth of the pipe holding mechanism in the axial direction of the oil pipe.

[0013] In one embodiment, the first protective baffle and the second protective baffle are both provided with a central hole for the oil pipe to pass through, and the radial dimension of the central hole is smaller than the outer diameter of the slip tooth.

[0014] In one embodiment, the first protective baffle and the second protective baffle are both formed by buckling two half baffles of the same structure, and when connected, the buckling surfaces of the two half baffles are cross-arranged with the buckling surfaces of the tooth seat sleeve of the pipe holding mechanism.

[0015] In one embodiment, handles are provided on the outer sides of the tooth seat sleeve, the first protective partition and the second protective partition.

[0016] The utility model provides a petroleum pipe undercut device, which has at least the following beneficial effects compared with the prior art:

[0017] The utility model of the oil pipe back-up device is through the coaxial connection of the bushing and the pipe holding mechanism, so that the bushing can be installed in the turntable, and the pipe holding mechanism can clamp the oil pipe, so that the bushing can rotate under the drive of the turntable, and then drive the pipe holding mechanism to clamp the oil pipe to perform the back-up operation. In this way, the stuck oil pipe can be back-up, so that the back-up operation is not limited by the square drill rod, and the operation is safe, convenient, and fast, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0019] Figure 1 It is a front view of the undercut device of the embodiment of the utility model;

[0020] Figure 2 It is a top view of the undercut device of the embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the connection between the slip teeth and the tooth seat sleeve of the embodiment of the utility model;

[0022] Figure 4 It is a side view of the kava tooth of the utility model embodiment.

[0023] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0024] Reference numerals:

[0025] 1-filling, 2-slip tooth, 3-seat sleeve, 4-first protective baffle, 5-second protective baffle, 6-connecting column,

[0026] 7-fixing part, 8-handle, 9-connecting hole. DETAILED DESCRIPTION

[0027] The utility model will be further described below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 4 As shown, the oil pipe undercut device of the utility model comprises a bushing 1 and a pipe holding mechanism, the pipe holding mechanism is coaxially connected with the bushing 1 and the two are circumferentially fixed, the bushing 1 is used to be matched and installed in the turntable, and the pipe holding mechanism is used to clamp the oil pipe and be circumferentially fixed with the oil pipe; the bushing 1 can rotate under the drive of the turntable, so that the pipe holding mechanism can drive the oil pipe to perform an undercut operation.

[0029] Specifically, the oil pipe back-up device is a coaxially connected bushing 1 and a pipe holding mechanism, so that the bushing 1 can be loaded into the turntable, and the pipe holding mechanism can clamp the oil pipe, so that the bushing 1 can rotate under the drive of the turntable, and then drive the pipe holding mechanism to clamp the oil pipe to perform back-up operation. When the drill is stuck during well repair, side drilling, and drilling construction, when the square drill rod is not in the turntable, it is impossible to perform back-up or rotation operations on site. The back-up device can be used to back-up the stuck oil pipe, so that the back-up operation is not limited by the square drill rod, and the operation is safe, convenient, and fast, and the use effect is good.

[0030] like Figure 2 and Figure 3As shown, in one example, the pipe holding mechanism includes a slip tooth 2 and a socket sleeve 3, the slip tooth 2 is located in the socket sleeve 3 and the two are circumferentially fixed, the slip tooth 2 is used to clamp the oil pipe, and the socket sleeve 3 is used to connect with the bushing 1.

[0031] Specifically, the slip teeth 2 clamp the outer surface of the oil pipe by embracing and biting, the tooth seat sleeve 3 is set outside the slip teeth 2 and the two are fixed in the circumferential direction, and the tooth seat sleeve 3 and the bushing 1 are also fixed in the circumferential direction and can only rotate synchronously. Therefore, the bushing 1 is installed in the turntable, and the turntable drives the bushing 1 to rotate, so that the tooth seat sleeve 3 and the slip teeth 2 rotate together with the bushing 1, thereby realizing the slip teeth 2 to hold the oil pipe and rotate.

[0032] In an example, Figure 3 As shown, the slip tooth 2 is an elliptical ring structure, and the inner ring of the tooth seat sleeve 3 is an elliptical structure matching the outer ring of the slip tooth 2.

[0033] Specifically, the inner ring of the slip teeth 2 is provided with teeth that can bite on the outer surface of the oil pipe to achieve circumferential fixation of the slip teeth 2 and the oil pipe. The structure and size of the ellipse of the outer ring of the slip teeth 2 match the ellipse of the inner ring of the tooth seat sleeve 3, so that the tooth seat sleeve 3 is just sleeved outside the slip teeth 2. In this way, when the tooth seat sleeve 3 rotates circumferentially, the inner ring applies torque to the outer ring of the slip teeth 2 to achieve synchronous rotation, thereby achieving circumferential fixation of the tooth seat sleeve 3 and the slip teeth 2.

[0034] In one example, the slip thread 2 is formed by buckling two half slip threads of the same structure, and the tooth seat sleeve 3 is formed by buckling two half tooth seats of the same structure.

[0035] Specifically, the slip teeth 2 and the tooth seat sleeve 3 are both composed of two parts with the same structure, which can form a stable symmetrical structure, facilitate installation outside the oil pipe, and also facilitate unified processing and manufacturing.

[0036] In an example, Figure 1 and Figure 2 As shown, the socket sleeve 3 is connected to the bushing 1 through a connecting column 6. The length direction of the connecting column 6 is arranged along the axial direction of the oil pipe, and one end of the connecting column 6 is fixed to the bushing 1, and the other end passes through the socket sleeve 3 and is fastened by a fixing piece 7.

[0037] Specifically, there are multiple connecting columns 6, which are evenly distributed along the circumference of the oil pipe. One end of each of the multiple connecting columns 6 is fixedly connected to the bushing 1, and then passes through the socket sleeve 3, and the other end is fastened by the fixing member 7, so that the socket sleeve 3 is fixedly connected to the bushing 1, and the bushing 1 is fixed after being installed in the turntable, so that the socket sleeve 3 is also relatively fixed.

[0038] Furthermore, four connecting posts 6 are provided, and two connecting posts 6 are correspondingly passed through each half seat.

[0039] It should be noted that the bushing 1 can also be formed by buckling two half-buckings 1 of the same structure. When the bushing 1 and the seat sleeve 3 are connected by four connecting columns 6, the buckling surfaces of the two half-buckings 1 and the buckling surfaces of the two half-seats are cross-arranged, for example, they can be perpendicular to each other. In this way, the two separated half-buckings 1 of the bushing 1 can ensure the stability of the buckling of the two through the integrity of the half-seat of the seat sleeve 3. Similarly, the two separated half-seats of the seat sleeve 3 can ensure the stability of the buckling of the half-buckings 1 of the bushing 1 through the integrity of the half-seat of the seat sleeve 3.

[0040] Furthermore, the connecting column 6 can be a bolt with threads at both ends, the bushing 1 is correspondingly provided with a threaded hole matching the end threads of the connecting column 6 , and the fixing piece 7 is a nut matching the end threads of the connecting column 6 .

[0041] In an example, Figure 4 As shown, the buckling end faces of the two half slips are provided with connecting holes 9 corresponding to each other, and the two half slips can be connected by passing the fixing pin through the connecting hole 9. In this way, connecting the two half slips by fixing the pin can increase the stability of the slip teeth 2 biting the oil pipe, and avoid the situation that the split slip teeth 2 cannot clamp the oil pipe due to the large gap between the tooth seat sleeve 3 and the slip teeth 2.

[0042] In an example, Figure 1 As shown, a first protective baffle 4 is provided between the pipe holding mechanism and the bushing 1, and a second protective baffle 5 is provided at the end of the pipe holding mechanism away from the bushing 1. The first protective baffle 4 and the second protective baffle 5 cooperate to limit the position of the slip teeth 2 of the pipe holding mechanism in the axial direction of the petroleum pipe.

[0043] Specifically, the first protective baffle 4 and the second protective baffle 5 are arranged at both ends of the tooth seat sleeve 3. The first protective baffle 4 and the second protective baffle 5 are both provided with through holes for the connection column 6 to pass through, and the first protective baffle 4 and the second protective baffle 5 are fixedly connected with the bushing 1 and the tooth seat sleeve 3 through the connection column 6. The first protective baffle 4 and the second protective baffle 5 can prevent the slip tooth 2 from moving relative to the tooth seat sleeve 3 in the axial direction of the oil pipe, and prevent the slip tooth 2 from popping out and causing the undercut device to fail.

[0044] In an example, Figure 2 As shown, the first protective baffle 4 and the second protective baffle 5 are both provided with a central hole for the oil pipe to pass through, and the radial dimension of the central hole is smaller than the outer diameter of the slip tooth 2.

[0045] In an example, Figure 1 and Figure 2 As shown, the first protective baffle 4 and the second protective baffle 5 are both formed by buckling two half baffles of the same structure, and when connected, the buckling surfaces of the two half baffles are cross-arranged with the buckling surfaces of the tooth seat sleeve 3 of the pipe holding mechanism.

[0046] Specifically, the fastening surfaces of the first protective baffle 4 and the second protective baffle 5 are the same and perpendicular to the fastening surface of the socket sleeve 3, and the fastening surface of the core 1 is the same as the fastening surface of the socket sleeve 3. In this way, the fastening surfaces of the core 1, the first protective baffle 4, the socket sleeve 3 and the second protective baffle 5 connected in sequence are cross-arranged in sequence, which can make the undercut device have stronger stability.

[0047] In an example, Figures 1 to 3 As shown, the outer sides of the tooth seat sleeve 3, the first protective partition 4 and the second protective partition 5 are all provided with handles 8. Because the tooth seat sleeve 3, the first protective partition 4 and the second protective partition 5 are all made of metal materials, they are heavy and difficult to carry, and the provision of handles 8 can facilitate transportation and hoisting. Furthermore, multiple handles 8 can be provided and symmetrically distributed.

[0048] The utility model adopts the above-mentioned petroleum pipe undercutting device to perform undercutting operation, which at least includes the following steps:

[0049] The bushing 1 is installed into the turntable, the pipe holding mechanism is connected to the bushing 1 and clamps the oil pipe, and then the turntable is started to reverse, so as to drive the bushing 1 to drive the pipe holding mechanism to clamp the oil pipe for reverse operation.

[0050] In order to better understand the above embodiments, the installation process of the undercut device of the present invention is further described in conjunction with the accompanying drawings.

[0051] When the oil pipe needs to be rotated and reversed, the bushing 1 is respectively installed in the turntable with the square bushing, and the first protective baffle 4 is installed on the bushing 1 through the connecting column 6 in a cross-locking manner (the locking surface of the upper structure is crossed with the locking surface of the lower structure), and then the slip tooth 2 is buckled on the oil pipe and installed on the first protective baffle 4, and tightened with a fixing pin, and the tooth seat sleeve 3 is installed on the first protective baffle 4 through the connecting column 6 in a cross-locking manner, and finally the second protective baffle 5 is also installed on the tooth seat sleeve 3 through the connecting column 6 in a cross-locking manner, and the fixing piece 7 is tightened, and the turntable can be started to rotate the oil pipe forward or reversely to realize the buckle making or reversed operation.

[0052] In summary, the utility model utilizes the rotation of the workover turntable and combines the embracing and biting principle of the fishing tool to carry out combined design and processing, and bites the body of the oil pipe through the undercut device to realize the operations of making, undercutting and rotating.

[0053] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A petroleum pipe undercut device, characterized in that: The undercut device comprises a bushing and a pipe holding mechanism, wherein the pipe holding mechanism is coaxially connected to the bushing and the two are circumferentially fixed, the bushing is used to be matched and installed in the turntable, and the pipe holding mechanism is used to clamp the oil pipe and is circumferentially fixed to the oil pipe; the bushing can rotate under the drive of the turntable, so that the pipe holding mechanism can drive the oil pipe to perform an undercut operation; The pipe holding mechanism comprises a slip tooth and a tooth seat sleeve, wherein the slip tooth is located in the tooth seat sleeve and the two are circumferentially fixed, the slip tooth is used to clamp the oil pipe, and the tooth seat sleeve is used to connect with the bushing; A first protective baffle is provided between the pipe holding mechanism and the bushing, and a second protective baffle is provided at one end of the pipe holding mechanism away from the bushing. The first protective baffle and the second protective baffle cooperate to limit the position of the slip teeth of the pipe holding mechanism in the axial direction of the petroleum pipe.

2. The petroleum pipe undercut device according to claim 1, characterized in that: The slip teeth are of an elliptical ring structure, and the inner ring of the tooth seat sleeve is of an elliptical structure matching the outer ring of the slip teeth.

3. The petroleum pipe undercut device according to claim 1, characterized in that: The slip teeth are formed by buckling two half slips with the same structure, and the tooth seat sleeve is formed by buckling two half tooth seats with the same structure.

4. The petroleum pipe undercut device according to claim 1, characterized in that: The socket sleeve is connected to the bushing through a connecting column, the length direction of the connecting column is arranged along the axial direction of the oil pipe, one end of the connecting column is fixed to the bushing, and the other end passes through the socket sleeve and is fastened by a fixing piece.

5. The petroleum pipe undercut device according to claim 3, characterized in that: The buckled end faces of the two half slips are both provided with connecting holes corresponding to each other, and the two half slips can be connected by fixing pins passing through the connecting holes.

6. The petroleum pipe undercut device according to claim 1, characterized in that: The first protective baffle and the second protective baffle are both provided with a central hole for the oil pipe to pass through, and the radial dimension of the central hole is smaller than the outer diameter dimension of the slip tooth.

7. The petroleum pipe undercut device according to claim 1, characterized in that: The first protective baffle and the second protective baffle are both formed by buckling two half baffles of the same structure, and when connected, the buckling surfaces of the two half baffles are cross-arranged with the buckling surfaces of the tooth seat sleeve of the pipe holding mechanism.

8. The petroleum pipe undercut device according to claim 7, characterized in that: The outer sides of the tooth seat sleeve, the first protective partition and the second protective partition are all provided with handles.

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