Safety joint for oil well

Abstract

The safety connector for the oil well comprises a connecting rod and a drill bit, a fixing groove is formed in the bottom of the connecting rod, a fixing rod is installed in the fixing groove in a sliding mode, one end of the fixing rod extends into the fixing groove, and the other end of the fixing rod extends out of the fixing groove. The end, extending out of the fixing groove, of the fixing rod is fixedly connected with the top of a drill bit, a through hole is formed in the inner wall of one side of the fixing groove, a first rotating shaft is rotationally installed on the inner wall of the bottom of the through hole, one end of a blocking rod is rotationally installed on the first rotating shaft, and the other end of the blocking rod extends out of the through hole. A sliding groove is formed in the inner wall of the top of the through hole, a sliding block is slidably installed in the sliding groove, and one end of the sliding block extends into the sliding groove. The connecting rod is fixedly connected with the drill bit through the fixing rod and the blocking rod, the problem that a connector falls in an oil extraction casing pipe can be effectively solved, and usability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a safety joint for oil wells. Background Technique

[0002] A safety joint is a safety tool connected to the downhole string and is used in operations such as drilling, fishing, well flushing, workover, and testing. In the later stage of oilfield development, sand control in oil wells is an important measure to increase and stabilize oil well production.

[0003] However, there are still certain problems when the existing drill bits are in use:

[0004] Due to the relatively high sand content in oil wells, the sand control pipe is often blocked or buried by sand and loses its sand control function. In order to ensure the normal production of oil wells, it is necessary to frequently perform workover to replace the sand control pipe. Once the production string breaks or falls off, the production string will fall along the inside of the production casing, resulting in secondary damage to the production equipment and oil well pollution. At the same time, as the depth of current oil wells increases and the size of the production casing decreases, the degree of damage to the production equipment is greater, and the fishing difficulty and cost are also higher.

[0005] In view of the above problems, an innovative design is carried out on the basis of the original drill bit. Content of the Utility Model

[0006] The purpose of the utility model is to provide a safety joint for oil wells to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A safety joint for oil wells, including a connecting rod and a drill bit. A fixing groove is opened at the bottom of the connecting rod. A fixing rod is slidably installed in the fixing groove. One end of the fixing rod extends into the fixing groove, and the other end of the fixing rod extends out of the fixing groove. The end of the fixing rod extending out of the fixing groove is fixedly connected to the top of the drill bit. A through hole is opened on one side inner wall of the fixing groove. A first rotating shaft is rotatably installed on the bottom inner wall of the through hole. One end of a blocking rod is rotatably installed on the first rotating shaft, and the other end of the blocking rod extends out of the through hole. A clamping groove is opened on one side of the fixing rod;

[0008] A sliding groove is opened on the top inner wall of the through hole. A sliding block is slidably installed in the sliding groove. One end of the sliding block extends into the sliding groove, and the other end of the sliding block extends out of the sliding groove;

[0009] One end of the sliding block extending out of the sliding groove is fixedly installed with a vertical rod. A moving groove is opened on one side of the vertical rod. A moving block is slidably installed in the moving groove. One end of the moving block extends into the moving groove, and the other end of the moving block extends out of the moving groove. One end of the moving block extending out of the moving groove is rotatably installed with a second rotating shaft, and the second rotating shaft is rotatably connected to one side of the blocking rod;

[0010] A receiving groove is formed in the inner wall of the top of the fixing groove. A telescopic rod is slidably installed in the receiving groove. One end of the telescopic rod extends into the receiving groove, and the other end of the telescopic rod extends out of the receiving groove.

[0011] A cross bar is fixedly installed on one side of the vertical rod. An opening is formed in one side of the telescopic rod. The opening is sleeved on the cross bar. A limiting rod is fixedly installed on the inner wall of the top of the opening. A limiting groove is formed in one side of the top of the cross bar.

[0012] Preferably, the fixing rod is adapted to the fixing groove.

[0013] With the above technical solution, the fixing rod is used to fix the drill bit and the connection.

[0014] Preferably, the retaining rod is adapted to the card slot.

[0015] With the above technical solution, the retaining rod is used to fix the fixing rod.

[0016] Preferably, one end of a first spring is fixedly installed on one side of the sliding block, and the other end of the first spring is fixedly connected to the inner wall of one side of the sliding groove.

[0017] With the above technical solution, the first spring is used to drive the moved sliding block to reset.

[0018] Preferably, one end of a second spring is fixedly installed on the top of the telescopic rod, and the other end of the second spring is fixedly connected to the inner wall of the top of the receiving groove.

[0019] With the above technical solution, the second spring is used to drive the moved telescopic rod to reset.

[0020] Preferably, the limiting rod is adapted to the limiting groove.

[0021] With the above technical solution, the limiting rod is used to fix the moved cross bar.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] The connecting rod is fixedly connected to the drill bit through the fixing rod and the retaining rod, which can effectively avoid the problem that the joint falls in the oil production casing, and greatly improves the usability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the structure of the present utility model;

[0025] Figure 2 It is a schematic view of part A of the structure of the present utility model;

[0026] Figure 3This is a schematic diagram of part B of the structure of the present utility model.

[0027] In the figure: 1, connecting rod; 2, drill bit; 3, fixing groove; 4, fixing rod; 5, through hole; 6, blocking rod; 7, clamping groove; 8, sliding groove; 9, sliding block; 10, vertical rod; 11, moving groove; 12, moving block; 13, storage groove; 14, telescopic rod; 15, opening; 16, cross bar; 17, limiting rod; 18, limiting groove. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1-3 , the present utility model provides a technical solution: a safety joint for oil wells, including a connecting rod 1 and a drill bit 2. A fixing groove 3 is opened at the bottom of the connecting rod 1. A fixing rod 4 is slidably installed in the fixing groove 3. One end of the fixing rod 4 extends into the fixing groove 3, and the other end of the fixing rod 4 extends out of the fixing groove 3. The end of the fixing rod 4 extending out of the fixing groove 3 is fixedly connected to the top of the drill bit 2. A through hole 5 is opened on one inner wall of the fixing groove 3. A first rotating shaft is rotatably installed on the bottom inner wall of the through hole 5. One end of a blocking rod 6 is rotatably installed on the first rotating shaft. The other end of the blocking rod 6 extends out of the through hole 5. A clamping groove 7 is opened on one side of the fixing rod 4.

[0030] Combined with Figures 1-3 As shown in, a sliding groove 8 is opened on the top inner wall of the through hole 5. A sliding block 9 is slidably installed in the sliding groove 8. One end of the sliding block 9 extends into the sliding groove 8, and the other end of the sliding block 9 extends out of the sliding groove 8. The end of the sliding block 9 extending out of the sliding groove 8 is fixedly installed with a vertical rod 10. A moving groove 11 is opened on one side of the vertical rod 10. A moving block 12 is slidably installed in the moving groove 11. One end of the moving block 12 extends into the moving groove 11, and the other end of the moving block 12 extends out of the moving groove 11. The end of the moving block 12 extending out of the moving groove 11 is rotatably installed with a second rotating shaft, and the second rotating shaft is rotatably connected to one side of the blocking rod 6.

[0031] Combined with Figures 1-2As shown, a storage groove 13 is formed in the top inner wall of the fixed groove 3. A telescopic rod 14 is slidably installed in the storage groove 13. One end of the telescopic rod 14 extends into the storage groove 13, and the other end of the telescopic rod 14 extends out of the storage groove 13. A cross bar 16 is fixedly installed on one side of the vertical rod 10. An opening 15 is formed in one side of the telescopic rod 14. The opening 15 is sleeved on the cross bar 16. A limiting rod 17 is fixedly installed on the top inner wall of the opening 15. A limiting groove 18 is formed in one side of the top of the cross bar 16.

[0032] The working principle of the utility model: When fixation is required, first horizontally move the vertical rod 10. The vertical rod 10 drives the moving groove 11 and the moving block 12 to move horizontally. The moving block 12 drives the second rotating shaft to move horizontally. The second rotating shaft drives the shifting rod 6 to rotate. The shifting rod 6 is retracted into the through hole 5. At the same time, the vertical rod 10 drives the cross bar 16 to move horizontally. The cross bar 16 drives the limiting groove 18 to move horizontally. When the limiting groove 18 moves to directly below the limiting rod 17, then the second spring drives the telescopic rod 14 to move downward. The telescopic rod 14 drives the opening 15 to move downward. The opening 15 drives the limiting rod 17 to be clamped into the limiting groove 18. Then the fixing rod 4 is clamped into the fixed groove 3. Then the fixing rod 4 drives the telescopic rod 14 to move upward. The telescopic rod 14 drives the opening 15 and the limiting rod 17 to move upward. The limiting rod 17 disengages from the limiting groove 18. Then the first spring drives the sliding block 9 to move horizontally. The sliding block 9 drives the vertical rod 10 to move horizontally. The vertical rod 10 drives the moving groove 11 and the moving block 12 to move horizontally. The moving block 12 drives the second rotating shaft to move horizontally. The second rotating shaft drives the shifting rod 6 to rotate. The shifting rod 6 is clamped into the clamping groove 7, so as to achieve the purpose of fixation.

[0033] The content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A safety joint for oil wells, comprising a connecting rod (1) and a drill bit (2), characterized in that: The bottom of the connecting rod (1) is provided with a fixing groove (3), a fixing rod (4) is slidably installed in the fixing groove (3), one end of the fixing rod (4) extends into the fixing groove (3), the other end of the fixing rod (4) extends out of the fixing groove (3), the end of the fixing rod (4) extending out of the fixing groove (3) is fixedly connected to the top of the drill bit (2), a through hole (5) is provided on the inner wall of one side of the fixing groove (3), a first rotating shaft is rotatably installed on the inner wall of the bottom of the through hole (5), one end of a shift rod (6) is rotatably installed on the first rotating shaft, the other end of the shift rod (6) extends out of the through hole (5), and a clamping groove (7) is provided on one side of the fixing rod (4); A sliding groove (8) is provided on the inner wall of the top of the through hole (5), a sliding block (9) is slidably installed in the sliding groove (8), one end of the sliding block (9) extends into the sliding groove (8), and the other end of the sliding block (9) extends out of the sliding groove (8); The end of the sliding block (9) extending outside the sliding groove (8) is fixedly mounted with a vertical rod (10), a moving groove (11) is opened on one side of the vertical rod (10), a moving block (12) is slidably mounted in the moving groove (11), one end of the moving block (12) extends into the moving groove (11), the other end of the moving block (12) extends outside the moving groove (11), and a second rotating shaft is rotatably mounted on the end of the moving block (12) extending outside the moving groove (11), and the second rotating shaft is rotatably connected to one side of the gear lever (6); A receiving groove (13) is provided on the inner wall of the top of the fixing groove (3), a telescopic rod (14) is slidably installed in the receiving groove (13), one end of the telescopic rod (14) extends into the receiving groove (13), and the other end of the telescopic rod (14) extends out of the receiving groove (13); A cross bar (16) is fixedly mounted on one side of the vertical bar (10), an opening (15) is provided on one side of the telescopic bar (14), the opening (15) is sleeved on the cross bar (16), a limiting rod (17) is fixedly mounted on the top inner wall of the opening (15), and a limiting groove (18) is provided on one side of the top of the cross bar (16).

2. The safety joint for oil wells according to claim 1, characterized in that: The fixing rod (4) is matched with the fixing groove (3).

3. The safety joint for oil wells according to claim 1, characterized in that: The shift rod (6) is matched with the clamping slot (7).

4. The safety joint for oil wells according to claim 1, characterized in that: One end of a first spring is fixedly mounted on one side of the sliding block (9), and the other end of the first spring is fixedly connected to an inner wall of one side of the sliding groove (8).

5. The safety joint for oil wells according to claim 1, characterized in that: One end of a second spring is fixedly mounted on the top of the telescopic rod (14), and the other end of the second spring is fixedly connected to the top inner wall of the storage groove (13).

6. The safety joint for oil wells according to claim 1, characterized in that: The limiting rod (17) is matched with the limiting groove (18).

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