Plug valve for drilling and repairing operation of oil and gas well

Abstract

The utility model discloses a plug valve for oil and gas well drilling and repairing operation, which belongs to the technical field of drilling equipment and comprises a shell, the shell is divided into an upper part, a middle part and a lower part, the upper half part and the lower half part of the shell are symmetrically distributed along the central line of the middle part, an internal flow channel is arranged in the shell, two opposite shell bypass holes are circumferentially arranged at two ends of the shell, and the shell bypass holes are communicated with the internal flow channel. Rotary knob parts are arranged in the bypass holes of the shell, upper end connecting threads are arranged at the two ends of the internal flow channel, a first annular groove, a second annular groove and a third annular groove are formed in the positions, close to the upper end connecting threads, of the two ends of the internal flow channel, and ball valve parts are connected to the first annular groove, the second annular groove and the third annular groove; an inner hole wear-resisting sleeve is further arranged in an inner flow channel between the ball valve components, and one end of the knob component is connected with the ball valve components. According to the plug valve, the knob component and the ball valve component are arranged in the shell, stress concentration is smaller through cooperation of the multiple components, and the service life of the plug valve is longer.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling equipment, and particularly relates to a plug valve for oil and gas well drilling and workover operations. Background Technique

[0002] A plug valve is a quick-opening and closing straight-through valve that realizes opening or closing by rotating 90 degrees to make the channel opening on the valve plug communicate with or separate from the channel opening on the valve body. In the field of oil drilling, the plug valve is widely used in the drill string circulation system and is a manual control valve that can play a high-pressure sealing role.

[0003] In the existing plug valves used in oil and gas industry drilling and workover operations, which are connected to the top of the drilling and workover string, when the knob in the side hole of the plug valve rotates, it drives the ball valve to rotate, realizing the opening and closing of the internal flow channel of the plug valve. The problems existing in this structure of the plug valve are as follows: First, there is serious stress concentration in the threaded parts and side holes at both ends of the plug valve; second, under the action of large hook load, large torque and strong swing, etc., the threaded parts and side holes at both ends of the plug valve are prone to fatigue cracking; third, the service life is short.

[0004] Therefore, how to provide a plug valve for oil and gas well drilling and workover operations with a longer service life is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a plug valve for oil and gas well drilling and workover operations to solve the above technical problems. In this device, a knob component and a ball valve component are arranged in the shell, and through the cooperation between multiple components, the stress concentration is smaller, and the service life of the plug valve is longer.

[0006] To achieve the above purpose, the utility model adopts the following technical solution:

[0007] A plug valve for oil and gas well drilling and workover operations includes a shell. The shell is divided into upper, middle and lower parts. The upper and lower parts of the shell are symmetrically distributed along the central axis of the middle part. An internal flow channel is arranged inside the shell. Two opposite shell side holes are circumferentially arranged at both ends of the shell. Knob components are arranged in the shell side holes. Upper connection threads are arranged at both ends of the internal flow channel. A first annular groove, a second annular groove and a third annular groove are arranged at both ends of the internal flow channel near the upper connection threads. A ball valve component is connected at the first annular groove, the second annular groove and the third annular groove. An inner hole wear-resistant sleeve is further arranged in the internal flow channel between the ball valve components. The knob component is connected with the ball valve component.

[0008] Further, the ball valve component includes an upper limit ring, an upper valve seat, a lower limit ring, a ball valve, a lower valve seat, and a corrugated spring. The upper limit ring is arranged in the first annular groove, and at the same time, one side of the upper limit ring away from the upper end connection thread abuts against the upper valve seat. A lower limit ring is arranged in the second annular groove, and the lower limit ring is sleeved on the shoulder of the upper valve seat. One end of the upper valve seat away from the upper limit ring abuts against the ball valve, and the ball valve also abuts against one end of the lower valve seat. One end of the lower valve seat away from the ball valve abuts against the inner hole wear-resistant sleeve, and the shoulder of the lower valve seat abuts against the corrugated spring arranged in the third annular groove.

[0009] Further, a fixed ring is fixedly arranged inside the upper limit ring.

[0010] Further, an upper valve seat sealing ring is sleeved on the upper valve seat, and a lower valve seat sealing ring is sleeved on the lower valve seat.

[0011] Further, the knob component includes a knob outer sleeve, a knob, and a cross slider. The bottom end of the cross slider is connected to the ball valve, the top end of the cross slider is connected to the knob, the knob is sleeved with the knob outer sleeve, the knob outer sleeve is arranged in the side through hole of the housing, a knob sealing ring is sleeved on the knob to achieve an interference fit with the knob outer sleeve, and a knob outer sleeve sealing ring is sleeved on the knob outer sleeve to achieve an interference fit with the side through hole of the housing.

[0012] Further, the knob outer sleeve includes a knob outer sleeve main body arranged in the side through hole of the housing. A cylindrical knob hole is penetrated through the knob outer sleeve main body, a rotation limit boss is arranged in the cylindrical knob hole, a sealing groove is arranged circumferentially on the knob outer sleeve main body, and a radial limit boss is arranged at one end of the knob outer sleeve main body.

[0013] Further, the knob outer sleeve main body is a semi-circular key-shaped cylinder.

[0014] Further, the knob outer sleeve main body is an oval cylinder.

[0015] Further, an external groove is arranged in the middle of the housing.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] In the present utility model, a knob component and a ball valve component are arranged in the housing. Through the cooperation among multiple components, the stress concentration is smaller, and the service life of the plug valve is longer. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0019] Figure 1 It is a schematic structural diagram of the upper half part of the present invention.

[0020] Figure 2 It is a schematic structural diagram of the lower half part of the present invention.

[0021] Figure 3 It is a schematic structural diagram of a knob outer sleeve in the shape of a semi-circular head key.

[0022] Figure 4 It is a schematic structural diagram of an oval knob outer sleeve.

[0023] Wherein, 1 - housing, 2 - internal flow channel, 3 - upper end connection thread, 4 - upper limit ring, 5 - fixing ring, 6 - upper valve seat, 7 - upper valve seat sealing ring, 8 - lower limit ring, 9 - knob outer sleeve sealing ring, 10 - knob outer sleeve, 10.1 - cylindrical knob hole, 10.2 - rotation limit boss, 10.3 - knob outer sleeve main body, 10.4 - sealing groove, 10.5 - radial limit boss, 11 - housing side through hole, 12 - knob, 13 - knob sealing ring, 14 - cross slider, 15 - ball valve, 16 - lower valve seat sealing ring, 17 - lower valve seat, 18 - wave spring, 19 - external groove, 20 - inner hole wear-resistant sleeve. Specific embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Embodiment 1

[0026] Such as Figures 1 to 3As shown in the figure, the utility model provides a plug valve for oil and gas well drilling and workover operations, which includes a housing 1. The housing 1 is divided into upper, middle and lower parts. The upper and lower parts of the housing 1 are symmetrically distributed along the central axis of the middle part. An internal flow channel 2 is arranged inside the housing 1. Two opposite housing side through holes 11 are circumferentially arranged at both ends of the housing 1. Knob components are arranged in the housing side through holes 11. Upper connecting threads 3 are arranged at both ends of the internal flow channel 2. First annular grooves, second annular grooves and third annular grooves are arranged at both ends of the internal flow channel 2 near the upper connecting threads 3. A ball valve component is connected at the first annular groove, second annular groove and third annular groove. An inner hole wear-resistant sleeve 20 is also arranged in the internal flow channel 2 between the ball valve components. One end of the knob component close to the axis of the internal flow channel 2 is connected to the ball valve component.

[0027] In this embodiment, the ball valve component includes an upper limit ring 4, an upper valve seat 6, a lower limit ring 8, a ball valve 15, a lower valve seat 17 and a corrugated spring 18. The upper limit ring 4 is arranged in the first annular groove. At the same time, one side of the upper limit ring 4 far from the upper connecting thread 3 abuts against the upper valve seat 6. The lower limit ring 8 is arranged in the second annular groove. The lower limit ring 8 is sleeved on the shoulder of the upper valve seat 6. One end of the upper valve seat 6 far from the upper limit ring 4 abuts against the ball valve 15. The ball valve 15 also abuts against one end of the lower valve seat 17. One end of the lower valve seat 17 far from the ball valve 15 abuts against the inner hole wear-resistant sleeve 20. The shoulder of the lower valve seat 17 abuts against the corrugated spring 18 arranged in the third annular groove. The corrugated spring 18 generates a thrust on the lower valve seat 17 to realize the seal between the ball valve 15 and the upper valve seat 6 and the lower valve seat 17.

[0028] In this embodiment, a fixing ring 5 is also fixedly arranged inside the upper limit ring 4. The fixing ring 5 is used to fix the upper limit ring 4 and the upper valve seat 6.

[0029] In this embodiment, an upper valve seat sealing ring is also sleeved on the upper valve seat 6, and a lower valve seat sealing ring is also sleeved on the lower valve seat 17. The upper valve seat sealing ring 7 realizes the seal between the upper valve seat 6 and the internal flow channel 2. The lower valve seat sealing ring 16 realizes the seal between the lower valve seat 17 and the internal flow channel 2.

[0030] In this embodiment, the knob component includes a knob sleeve 10, a knob 23 and a cross slider 14, the bottom end of the cross slider 14 is connected to the ball valve 15, the top end of the cross slider 14 is connected to the knob 23, the knob 23 is sleeved with the knob sleeve 10, the knob sleeve 10 is arranged in the shell bypass hole 11, the knob 23 is also sleeved with a knob sealing ring 13 to achieve an interference fit with the knob sleeve 10, and the knob sleeve 10 is also sleeved with a knob sleeve sealing ring 9 to achieve an interference fit with the shell bypass hole 11; the shell bypass hole 11 and the knob sleeve 10 The matching surface is a non-cylindrical structure, which can prevent the knob sleeve 10 from rotating relative to the shell bypass hole 11; rotating the knob 12 can drive the ball valve 15 to rotate, and the rotation of the ball valve 15 realizes the opening and closing of the internal flow channel of the plug valve; when the ball valve 15 is closed, it bears the flow channel fluid pressure; when the ball valve 15 is opened, the fluid circulates.

[0031] In this embodiment, the knob jacket 10 includes a knob jacket body 10.3 arranged in the shell bypass hole 11, the knob jacket body 10.3 is penetrated by a cylindrical knob hole 10.1, a rotation limit boss 10.2 is arranged in the cylindrical knob hole 10.1, the knob jacket body 10.3 is circumferentially provided with a sealing groove 10.4, and one end of the knob jacket body 10.3 is also provided with a radial limit boss 10.5; the rotation limit boss 10.2 limits the rotation angle of the knob 12 to control the opening or closing of the ball valve 15.

[0032] In this embodiment, the knob cover body 10.3 is a semi-circular key-shaped cylinder, and the knob cover body 10.3 is not a cylinder, which can prevent the knob cover cylinder 10.3 from rotating relative to the shell bypass hole 11.

[0033] In this embodiment, an external groove 19 is provided in the middle of the housing 1 .

[0034] Working principle: When in use, the ball valve 15 is driven by rotating the knob 12, so that the flow channel of the ball valve 15 is connected with the internal flow channel 2, thereby realizing the opening of the ball valve 15. When closing, the knob 12 is rotated to drive the ball valve 15 to rotate, so that the flow channel of the ball valve 15 is staggered with the internal flow channel 2, and the ball valve 15 blocks the flow of liquid in the internal flow channel 2, thereby realizing the closing of the ball valve 15.

[0035] Example 2

[0036] like Figure 4 As shown, the difference between this embodiment and embodiment 1 lies in the structure of the knob cover body 10.3. The knob cover body 10.3 in this embodiment is an elliptical cylinder, which can prevent the knob cover 10 from rotating relative to the shell bypass hole 11, and the working principle is the same as that in embodiment 1.

[0037] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plug valve for oil and gas well drilling and workover operations, characterized in that, It includes a housing (1), which is divided into upper, middle, and lower parts. The upper and lower parts of the housing (1) are symmetrically distributed along the central axis of the middle part. An internal flow channel (2) is arranged inside the housing (1). Two opposite housing side through holes (11) are circumferentially arranged at both ends of the housing (1). Knob components are arranged in the housing side through holes (11). Upper connection threads (3) are arranged at both ends of the internal flow channel (2). A first annular groove, a second annular groove, and a third annular groove are arranged at both ends of the internal flow channel (2) near the upper connection threads (3). A ball valve component is connected at the first annular groove, the second annular groove, and the third annular groove. An inner hole wear-resistant sleeve (20) is also arranged in the internal flow channel (2) between the ball valve components. The knob component is connected to the ball valve component.

2. The plug valve for oil and gas well drilling and workover operations according to claim 1, characterized in that, The ball valve component includes an upper limit ring (4), an upper valve seat (6), a lower limit ring (8), a ball valve (15), a lower valve seat (17), and a corrugated spring (18). The upper limit ring (4) is arranged in the first annular groove. At the same time, one side of the upper limit ring (4) away from the upper connection thread (3) abuts against the upper valve seat (6). The lower limit ring (8) is arranged in the second annular groove. The lower limit ring (8) is sleeved on the shoulder of the upper valve seat (6). One end of the upper valve seat (6) away from the upper limit ring (4) abuts against the ball valve (15). The ball valve (15) also abuts against one end of the lower valve seat (17). One end of the lower valve seat (17) away from the ball valve (15) abuts against the inner hole wear-resistant sleeve (20). The shoulder of the lower valve seat (17) abuts against the corrugated spring (18) arranged in the third annular groove.

3. The plug valve for oil and gas well drilling and workover operations according to claim 2, characterized in that, A fixing ring (5) is also fixedly arranged inside the upper limit ring (4).

4. A plug valve for oil and gas well drilling and workover operations according to claim 2, characterized in that, An upper valve seat sealing ring is also sleeved on the upper valve seat (6), and a lower valve seat sealing ring is also sleeved on the lower valve seat (17).

5. A plug valve for oil and gas well drilling and workover operations according to claim 2, characterized in that, The knob component includes a knob outer sleeve (10), a knob (23), and a cross slider (14). The bottom end of the cross slider (14) is connected to the ball valve (15). The top end of the cross slider (14) is connected to the knob (23). The knob (23) is sleeved with the knob outer sleeve (10). The knob outer sleeve (10) is arranged in the housing side through hole (11). A knob sealing ring (13) is also sleeved on the knob (23) to achieve an interference fit with the knob outer sleeve (10). A knob outer sleeve sealing ring (9) is also sleeved on the knob outer sleeve (10) to achieve an interference fit with the housing side through hole (11).

6. The plug valve for oil and gas well drilling and workover operations according to claim 5, characterized in that, The knob outer sleeve (10) includes a knob outer sleeve main body (10.3) arranged in the housing side through hole (11). A cylindrical knob hole (10.1) is penetrated through the knob outer sleeve main body (10.3). A rotation limit boss (10.2) is arranged in the cylindrical knob hole (10.1). A sealing groove (10.4) is circumferentially arranged on the knob outer sleeve main body (10.3). A radial limit boss (10.5) is also arranged at one end of the knob outer sleeve main body (10.3).

7. A plug valve for oil and gas well drilling and workover operations according to claim 6, characterized in that, The knob outer sleeve main body (10.3) is a semi-circular head key-shaped cylinder.

8. A plug valve for oil and gas well drilling and workover operations according to claim 6, characterized in that, The knob outer sleeve body (10.3) is an oval cylinder.

9. A plug valve for oil and gas well drilling and workover operations according to claim 1, characterized in that, An external groove (19) is provided in the middle of the housing (1).

Images