An internal blowout preventer stopcock valve for use in oil well drilling

Abstract

The application provides an oil well opening and using built-in blowout prevention plug valve, which comprises a tubing body, a plug rotatably connected inside the tubing body, an upper rotating shaft and a lower rotating shaft fixedly installed at the top and bottom of the plug respectively, a rotating column fixedly installed at the bottom end of the lower rotating shaft, and a first threaded column sleeved outside the rotating column, and has the beneficial effects that the first threaded column and the second threaded column can rotate inside the bottom cover through the lower rotating shaft and the rotating column while the plug rotates through the upper rotating shaft, the first threaded column can slide downward under the action of the first threaded groove, the second threaded column can rotate inside the second threaded groove and slide downward, and the rotation angle of the plug can be fixed through the limiting action inside the bottom cover, so that the rotation of the plug inside the tubing body caused by the accidental pressing of the bottom column is prevented, and the use effect of the overall plug valve is improved.

Description

Technical Field

[0001] This invention belongs to the field of oil well development technology, specifically relating to an oil well development system with a built-in blowout preventer valve. Background Technology

[0002] A plug valve is a rotary valve with a shut-off element or plunger-shaped component. It opens or closes by rotating 90 degrees to connect or separate the passage on the plug from the passage on the valve body. An internal blowout preventer plug valve, however, has the plug valve structure installed inside the oil pipe. Currently, internal blowout preventer plug valves generally have the following recognized drawbacks:

[0003] When using tubing in oil well production, the tubing needs to be closed and circulated. However, the traditional built-in blowout preventer valve cannot effectively control the flow rate of the liquid in the tubing during the closing and circulation process. Furthermore, the external structure of the tubing body used to control the valve is easily affected by external pressure operations, which can cause deviations in the flow rate of the liquid in the built-in blowout preventer valve. Summary of the Invention

[0004] The purpose of this invention is to provide an oil well opening system with a built-in blowout preventer valve, which aims to solve the problem that the structure of the control valve body outside the tubing body in the prior art is easily affected by external pressure and other operations.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An oil well opening method employs a built-in blowout preventer plug valve, comprising an oil tubing body, a plug rotatably connected inside the oil tubing body, an upper rotating shaft and a lower rotating shaft fixedly installed at the top and bottom of the plug respectively, a rotating column fixedly installed at the bottom end of the lower rotating shaft, a first threaded column sleeved on the outer side of the rotating column, a second threaded column fixedly installed at the bottom end of the first threaded column, a bottom column fixedly installed at the bottom end of the second threaded column, and a bottom cover fixedly installed to the bottom of the oil tubing body sleeved on the outer side of the bottom column.

[0007] As a preferred embodiment of the present invention, the bottom cover is provided with a first threaded groove and a second threaded groove, and the first threaded groove and the second threaded groove are respectively threaded to the outer sides of the first threaded post and the second threaded post.

[0008] As a preferred embodiment of the present invention, a top cover is fixedly installed on the top of the oil pipe body, an operating shaft is rotatably connected inside the top cover, and a rotating ring is fixedly installed on the outer side of the top end of the operating shaft.

[0009] In a preferred embodiment of the present invention, the top end of the upper rotating shaft is rotatably connected to the inner side of the top cover, and the bottom end of the operating shaft is rotatably connected to the top of the oil pipe body.

[0010] As a kind of preferred of the application, the top cover top is respectively rotatably connected with main gear and pinion, and the outer side of the main gear and pinion is in mesh connection.

[0011] As a kind of preferred of the application, the bottom end of the operating shaft is fixedly connected with the inside of the main gear, and the top end of the upper rotating shaft is fixedly connected with the inside of the pinion.

[0012] Compared with the prior art, the application has the following beneficial effects:

[0013] 1) By setting the first threaded column and the second threaded column, the first threaded column and the second threaded column can be rotated in the inside of the bottom cover through the lower rotating shaft and the rotating column when the plug is rotated through the upper rotating shaft, so that the first threaded column can slide downward under the action of the first threaded groove, the second threaded column can rotate and slide downward in the second threaded groove, and then the rotation angle of the plug can be fixed through the limiting action in the inside of the bottom cover, so that the rotation of the plug in the inside of the oil pipe body is prevented when the bottom column is pressed by mistake, and the use effect of the overall plug valve is improved.

[0014] 2) By setting the different number of teeth between the main gear and the pinion, the rotation of the main gear can be driven by the operating shaft, so that the pinion can quickly drive the plug to rotate in the inside of the oil pipe body through the upper rotating shaft, so that the number of rotation required when the plug rotates can be obtained, and then the convenience of overall plug operation can be more effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, which together with the embodiments of the application, are used to explain the application, and do not constitute a limitation on the application. In the drawings:

[0016] Figure 1 It is the overall structure schematic diagram of the application;

[0017] Figure 2 It is the internal structure schematic diagram of the oil pipe body of the application;

[0018] Figure 3 It is the plug structure schematic diagram of the application;

[0019] Figure 4 It is the internal structure schematic diagram of the top cover of the application;

[0020] Figure 5 It is the internal structure schematic diagram of the bottom cover of the application.

[0021] In the figure: 1, oil pipe body; 2, plug; 3, upper rotating shaft; 4, lower rotating shaft; 5, rotating column; 6, first threaded column; 7, second threaded column; 8, bottom column; 9, bottom cover; 10, first threaded groove; 11, second threaded groove; 12, top cover; 13, operating shaft; 14, rotating ring; 15, main gear; 16, auxiliary gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Please refer to Figures 1-5 The present application provides the following technical solutions: an internal blowout preventer plug valve for oil well opening, comprising an oil pipe body 1, a plug 2 rotatably connected inside the oil pipe body 1, an upper rotating shaft 3 and a lower rotating shaft 4 fixedly installed at the top and bottom of the plug 2 respectively, a rotating column 5 fixedly installed at the bottom end of the lower rotating shaft 4, a first threaded column 6 sleeved on the outer side of the rotating column 5, a second threaded column 7 fixedly installed at the bottom end of the first threaded column 6, a bottom column 8 fixedly installed at the bottom end of the second threaded column 7, and a bottom cover 9 fixedly installed at the bottom of the oil pipe body 1 and sleeved on the outer side of the bottom column 8.

[0024] In specific use, when using the internal plug valve, first, the plug 2 can be rotated inside the oil pipe body 1 by the upper rotating shaft 3, so that the liquid flow rate inside the oil pipe body 1 can be adjusted in size and opened and closed by the plug 2. While the upper rotating shaft 3 is rotating, the lower rotating shaft 4 can be rotated by the plug 2, so that the first threaded column 6, the second threaded column 7 and the bottom column 8 can be rotated inside the bottom cover 9 by the action of the rotating column 5. While the first threaded column 6, the second threaded column 7 and the bottom column 8 are rotating, the first threaded column 6 can continuously slide outward on the rotating column 5, and the first threaded column 6, the second threaded column 7 and the bottom column 8 can simultaneously slide to the bottom inside the bottom cover 9. When the plug 2 is not rotating by the upper rotating shaft 3, the rotating column 5 can be kept from rotating by the first threaded column 6 and the second threaded column 7, so as to stabilize the plug 2 and improve the use effect of the overall plug valve.

[0025] Preferably, the bottom cover 9 is internally provided with a first threaded groove 10 and a second threaded groove 11, and the first threaded groove 10 and the second threaded groove 11 are respectively threadedly connected with the outer sides of the first threaded column 6 and the second threaded column 7.

[0026] Specific use, when the first threaded column 6 and the second threaded column 7 are driven to rotate by the rotating column 5, the first threaded column 6 is rotated and slid outward at the position of the first threaded groove 10, and the second threaded column 7 is rotated and slid outward under the action of the second threaded groove 11, when the first threaded column 6 and the second threaded column 7 slide to the bottom of the bottom cover 9, the first threaded column 6 and the second threaded column 7 stop rotating, thereby stabilizing the cock 2.

[0027] Preferably, the top of the oil pipe body 1 is fixedly provided with a top cover 12, the inside of the top cover 12 is rotatably connected with an operating shaft 13, and the top end of the operating shaft 13 is fixedly provided with a rotating ring 14 outside.

[0028] Specific use, when the first threaded column 6 and the second threaded column 7 are driven to rotate by the rotating column 5, the first threaded column 6 is rotated and slid outward at the position of the first threaded groove 10, and the second threaded column 7 is rotated and slid outward under the action of the second threaded groove 11, when the first threaded column 6 and the second threaded column 7 slide to the bottom of the bottom cover 9, the first threaded column 6 and the second threaded column 7 stop rotating, thereby stabilizing the cock 2.

[0029] Preferably, the top end of the upper rotating shaft 3 is rotatably connected with the inside of the top cover 12, and the bottom end of the operating shaft 13 is rotatably connected with the top of the oil pipe body 1.

[0030] Specific use, when the first threaded column 6 and the second threaded column 7 are driven to rotate by the rotating column 5, the first threaded column 6 is rotated and slid outward at the position of the first threaded groove 10, and the second threaded column 7 is rotated and slid outward under the action of the second threaded groove 11, when the first threaded column 6 and the second threaded column 7 slide to the bottom of the bottom cover 9, the first threaded column 6 and the second threaded column 7 stop rotating, thereby stabilizing the cock 2.

[0031] Preferably, the top of the top cover 12 is rotatably connected with a main gear 15 and a secondary gear 16, and the outside of the main gear 15 and the secondary gear 16 is in meshing connection.

[0032] Specific use, when the main gear 15 inside the top cover 12 rotates, since the radius and the number of teeth of the main gear 15 are greater than those of the secondary gear 16, when the main gear 15 rotates, the secondary gear 16 can quickly rotate inside the top cover 12, thereby improving the operating efficiency of the overall cock valve.

[0033] Preferably, the bottom end of the operating shaft 13 is fixedly connected with the inside of the main gear 15, and the top end of the upper rotating shaft 3 is fixedly connected with the inside of the secondary gear 16.

[0034] Specific use, when the operating shaft 13 rotates inside the top cover 12, the main gear 15 inside the top cover 12 can be rotated by the operating shaft 13, thereby enabling the secondary gear 16 to quickly rotate the upper rotating shaft 3 inside the top cover 12, thereby enabling the cock 2 to rotate inside the oil pipe body 1.

[0035] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An internal blowout preventer plug valve for use in oil well drilling, comprising a tubing body (1), characterized in that, The oil pipe body (1) is rotatably connected with a plug (2), the top and bottom of the plug (2) are respectively fixedly installed with an upper rotating shaft (3) and a lower rotating shaft (4), the bottom end of the lower rotating shaft (4) is fixedly installed with a rotating column (5), the outer side of the rotating column (5) is sleeved with a first threaded column (6), the bottom end of the first threaded column (6) is fixedly installed with a second threaded column (7), the bottom end of the second threaded column (7) is fixedly installed with a bottom column (8), the outer side of the bottom column (8) is sleeved with a bottom cover (9) fixedly installed at the bottom of the oil pipe body (1); The bottom cover (9) is internally provided with a first threaded groove (10) and a second threaded groove (11), the first threaded groove (10) and the second threaded groove (11) are respectively in external thread connection with the first threaded column (6) and the second threaded column (7); The top of the oil pipe body (1) is fixedly installed with a top cover (12), the inside of the top cover (12) is rotatably connected with an operating shaft (13), the top end of the operating shaft (13) is fixedly installed with a rotating ring (14) on the outer side.

2. An in-line blowout preventer plug valve for use in oil well operations according to claim 1, characterized in that: The top end of the upper rotating shaft (3) is rotatably connected with one side of the inside of the top cover (12), and the bottom end of the operating shaft (13) is rotatably connected with the top of the oil pipe body (1).

3. An in-line blowout preventer plug valve for use in oil well operations according to claim 2, characterized in that: The top of the top cover (12) is rotatably connected with a main gear (15) and a secondary gear (16), and the outer sides of the main gear (15) and the secondary gear (16) are in meshing connection.

4. An in-line blowout preventer plug valve for use in oil well operations according to claim 3, characterized in that: The bottom end of the operating shaft (13) is fixedly connected with the inside of the main gear (15) on the outer side, and the top end of the upper rotating shaft (3) is fixedly connected with the inside of the secondary gear (16) on the outer side.

Images