Emergency throttling device for well control

Abstract

The well control emergency throttling device comprises a throttling valve assembly, a connecting mechanism and an executor, the executor is an electric executor, one end of the executor is an output end, the other end of the executor is a manual end, the manual end is of a regular hexagon structure, and the size of the manual end is the same as that of the regular hexagon structure of a valve rod nut; the output end is connected with the connecting mechanism, and the manual end is provided with a hand wheel. One end of the actuator is arranged to be the manual end, the manual end is of a regular hexagon structure and is the same as the regular hexagon structure of the valve rod nut in size, the output end is connected with the connecting mechanism, the manual end is provided with a hand wheel, the throttle valve can be changed in a manual and electric driving mode, and after the actuator is detached, the manual end is connected with the valve rod nut. The hand wheel of the actuator can be directly installed on the regular hexagon structure of the valve rod nut of the connecting mechanism, so that the well control emergency throttling device can still be operated manually, and the throttling valve can continue to work.

Description

Technical Field

[0001] The present invention relates to the technical field of throttle valves, and specifically, to a throttling device for well control emergency. Background Art

[0002] The valve core and valve seat of the throttle valve are easily eroded by the long-term scouring of well fluid, especially the erosion of the valve core and valve seat by the solids carried in the well fluid is more serious. Due to the characteristics of the throttling function, it is necessary to continuously perform on-off adjustment. In this way, the parts that generate relative movement in the throttle valve, such as bearings and seals, are always in a relative movement state and are prone to wear. The parts such as the valve core, valve seat, bearing, and seal need to be replaced during the maintenance period. Most of the oil drilling and production equipment is used in the wild well site. When parts need to be replaced, due to the large weight of the parts, it is difficult to disassemble them manually, and there is mostly no hoisting equipment on site, resulting in difficult on-site maintenance work. During the on-site operation process, when the actuator fails, after the actuator is disassembled, the throttle valve cannot work. The anti-loosening of the bearing box of the conventional throttle valve is realized by using a setscrew, but this method has problems such as small contact surface and insufficient fastening strength, and is prone to loosening. Moreover, the thread is prone to slipping during multiple disassembly. Over time, the thread rusts, which easily leads to the problem that the throttle valve cannot be disassembled. The throttle valve cannot be quickly repaired on site, seriously affecting the on-site operation efficiency. There is a need for an electric-driven throttle valve on site that can be quickly maintained, easily disassembled, has reliable performance, and can switch the driving state.

[0003] In the prior art, the invention patent with the publication number of CN111720609A discloses an electric control orifice plate throttle valve for fine pressure control drilling, which includes a multi-turn electric actuator, a support frame, a connecting piece, and an orifice plate throttle valve. The multi-turn electric actuator is composed of a handwheel, a clutch, a worm, a turbine, a coupling mechanism, a low-inertia high-torque motor, a driving bevel gear, an output shaft, a driven bevel gear, a feedback shaft, a valve position absolute encoder, a local display window, a manual / electric knob, etc.

[0004] The patent is equipped with a handwheel on the actuator for manual operation. However, when the actuator fails and the actuator is disassembled, the throttle valve still cannot work. Moreover, the patent still does not solve the problem that the anti-loosening of the bearing box of the conventional throttle valve is realized by using a setscrew. This method has problems such as small contact surface and insufficient fastening strength, and is prone to loosening. Moreover, the thread is prone to slipping during multiple disassembly.

[0005] Therefore, it is an urgent problem for those skilled in the art to provide a throttling device for well control emergency that can be quickly maintained, easily disassembled, has reliable performance, and can switch the driving state. Summary of the Invention

[0006] The present invention aims to provide a throttle device for well control emergency that can be quickly maintained, easily disassembled, has reliable performance, and can switch the driving state. By designing one end of the actuator as a manual end with the same structural dimensions as the regular hexagonal structure of the valve stem nut, the handwheel of the actuator can be directly installed on the regular hexagonal structure of the valve stem nut of the connecting mechanism, enabling the throttle device for well control emergency to be manually operated, and the throttle valve can continue to work. It has the advantages of simple structure and convenient operation. After the actuator is removed, the throttle device for well control emergency can still continue to work.

[0007] In order to achieve the above-mentioned invention purpose, the technical solution of the present invention is as follows: A throttle device for well control emergency, comprising a throttle valve assembly, a connecting mechanism, and an actuator. The throttle valve assembly includes a valve body, a valve cover, a valve stem, a valve stem sealing device, a valve core, and a valve seat. The valve body is provided with an inlet hole, an outlet hole, and a closed hole. The closed hole and the outlet hole are located at both ends in the length direction of the valve body and on the same axis. The inlet hole and the outlet hole are arranged at 90 degrees on the side of the valve body. The valve seat is arranged in front of the outlet hole inside the valve body. The valve cover is fixedly installed at the closed hole. A through hole is provided at the center position of the valve cover. One end of the valve stem passes through the through hole of the valve cover and extends into the valve body to be connected with the valve core. A transmission thread is provided on the surface of the other end of the valve stem. A valve stem sealing device is provided at the connection between the valve stem and the through hole. The connecting mechanism includes a connecting flange, a valve stem nut, and a thrust bearing. One end of the connecting flange is connected to the actuator, and the other end is connected to the valve cover. The valve stem nut is internally provided with a thread that matches the transmission thread of the valve stem. One end of the valve stem nut is a regular hexagonal structure, and the other end is a stepped shaft structure. The stepped shaft end of the valve stem nut is connected to the valve stem inside the inner hole of the connecting flange. Two thrust bearings are installed on both sides of the outer circle of the stepped shaft end of the valve stem nut. The regular hexagonal end of the valve stem nut protrudes from the end face of the connecting flange. The actuator is an electric actuator. One end of the actuator is an output end, and the other end is a manual end. The manual end has the same structural dimensions as the regular hexagonal structure of the valve stem nut. The output end is connected to the flange surface of the connecting flange. A handwheel is provided at the manual end.

[0008] Furthermore, the throttle device for well control emergency further includes a mounting device and a winch. The mounting device is detachably connected to the end of the valve body close to the connecting mechanism. The winch is fixedly installed on the top of the mounting device.

[0009] Furthermore, the mounting device includes a fixed clamp, an intermediate seat plate, a support column, a crossbeam seat, and a crossbeam. The fixed clamp is installed on the valve body. The top of the fixed clamp is fixedly connected to the intermediate seat plate. The top of the intermediate seat plate is fixedly connected to the support column. The top of the support column is fixedly connected to the crossbeam seat. A crossbeam is provided on the crossbeam seat. The winch is fixedly connected to the crossbeam.

[0010] Furthermore, the fixed clamp is of a multi-segment structure. Different segments of the fixed clamp are connected by hinges. The fixed clamp is connected by a connecting rod and a set screw to form a complete circle.

[0011] Furthermore, adjusting screws for adjusting the perpendicularity of the installation device are installed on both sides of the middle seat plate. The middle seat plate is parallel to the surface of the valve body. The perpendicularity adjustment is achieved by adjusting the protruding length of the adjusting screws. Two connecting ears are provided at both ends of the middle seat plate in the length direction. Set screws are installed on the connecting ears. After the set screws are tightened, the firmness of the connection between the installation device and the valve body can be increased.

[0012] Furthermore, the crossbeam seat includes a seat plate, rollers and bearings. The seat plate is of a right-angled U-shaped structure. On both sides of the seat plate, more than 1 bearing mounting holes are provided at the upper part and more than 2 bearing mounting holes are provided at the lower part at corresponding positions. The bearings are installed in the bearing mounting holes on the seat plate. Both ends of the roller are installed in the bearings. The roller can freely rotate around the axis under the support of the bearings. The crossbeam is composed of a winch mounting plate and a square pipe beam. The mounting plate is located at one end of the square pipe beam. The other end of the square pipe beam passes through the crossbeam seat. The roller supports the crossbeam to be able to move horizontally in a straight line. The height of the square pipe beam corresponds to the vertical distance between the upper and lower rollers. The winch is fixedly installed on the winch mounting plate of the crossbeam.

[0013] Furthermore, the throttle device for well control emergency further includes a lifting clamp. The lifting clamp includes a clamp and a lifting lug. The lifting lug is fixedly connected to the clamp. The lifting clamp is of a multi-segment structure and is connected by a connecting rod and a fastening nut to form a complete circle. The lifting clamp is detachably installed on the actuator or the connecting flange.

[0014] Furthermore, a bearing receiving groove and bearing mounting pin holes are provided in the lifting clamp. The bearing mounting pin holes are evenly distributed around the circumference around the center of the circle. The bearing is placed in the receiving groove and is positioned in the lifting clamp by a pin shaft. The bearing on the lifting clamp contacts the actuator or the connecting flange. The actuator and the connecting flange can rotate in the lifting clamp during the installation process.

[0015] Furthermore, the valve cover is connected to the valve body by bolts and nuts. The connecting mechanism is provided with a nut anchoring type anti-loosening mechanism. The nut anchoring type anti-loosening mechanism includes a regular hexagon sleeve, a bolt, an anchoring plate and a nut. One end of the regular hexagon sleeve has an external thread, and the other end is a hollow cylinder structure. The internal of the hollow cylinder structure is a regular hexagon structure that matches the nut on the valve cover. A loosening prevention positioning screw hole is provided on the cylinder at the end where the connecting flange is connected to the valve cover. An internal thread is provided in the loosening prevention positioning screw hole. The anchor plate is of a sector structure. The inner side of the sector structure is matched with the outer side of the connecting flange. There are two connecting holes on the inner side of the anchor plate that are matched with the anti-loosening positioning screw holes of the connecting flange. There are two connecting holes on the outer side of the anchor plate that are matched with the external thread ends of the regular hexagon sleeves. The external thread ends of the regular hexagon sleeves pass through the connecting holes of the anchor plate and are connected to nuts. The bolts pass through the connecting holes of the anchor plate and are screwed into the anti-loosening positioning screw holes of the connecting flange.

[0016] Furthermore, two screw holes with axes staggered by 60° are provided at one end of the hollow cylinder of the regular hexagon sleeve. The positioning screws pass through the screw holes to further fasten the nuts and eliminate the gap between the regular hexagon sleeve and the nuts on the valve cover. Alignment grooves are provided at the corresponding positions of the middle of the inner side of the anchor plate and the connecting flange. During the installation process, the connecting flange and the valve cover are connected by threads. The hexagon sleeve is sleeved on the valve cover nut. When installing the anchor plate, the hexagon sleeve is inserted into the connecting holes of the anchor plate. The connecting flange rotates along the helix of the thread on the valve cover. When it rotates to the alignment groove of the anchor plate and the connecting flange is aligned, install and tighten the bolts to complete the installation.

[0017] The beneficial effects of the present invention are as follows: 1. In the present invention, one end of the actuator is set as a manual end. The manual end is of a regular hexagon structure and has the same size as the regular hexagon structure of the valve stem nut. The output end is connected to the connecting mechanism. A handwheel is provided on the manual end. The throttle valve can change between manual and electric drive modes. And after the actuator is disassembled, the handwheel of the actuator can be directly installed on the regular hexagon structure of the valve stem nut of the connecting mechanism, so that the throttle device for well control emergency can still be manually operated and the throttle valve can continue to work.

[0018] 2. The throttle device for well control emergency in the present invention further includes an installation device, a winch and a lifting clamp. During the installation and maintenance process, the actuator and the connecting flange can be lifted for installation and maintenance. The installation is convenient, saving a large amount of manpower and material resources. It solves the problem that most oil drilling and production equipment is used in the wild well site. When parts need to be replaced, due to the large weight of the parts, it is difficult to disassemble manually, and there is mostly no hoisting equipment on site, resulting in difficult on-site maintenance work.

[0019] 3. In the present invention, the lifting clamp can be detachably installed on the actuator or the connecting flange. During the installation, replacement of the thrust bearing, replacement of the valve stem seal device, replacement of the valve core, replacement of the valve cover, etc., the winch provided on the installation device can be used to lift the lifting clamp, so as to realize the relevant operations. The applicable range is wider, saving manpower and material resources, and avoiding damage caused by difficult manual operation.

[0020] 4. In the present invention, the fixed clamp of the installation device is detachably installed on the valve body. When the throttle device for well control emergency needs to be installed and maintained, the installation device, the winch and the lifting clamp are installed on the throttle device for well control emergency. When the installation and maintenance are completed, the installation device, the winch and the lifting clamp can be disassembled. Multiple devices can share a set of installation device, winch and lifting clamp, saving resources.

[0021] 5. The throttle device for well control emergency in the present invention further includes a nut anchoring type anti-loosening mechanism. The connecting nut of the valve cover is fixed to the connecting flange through the anchor plate, and the connecting flange will not loosen relative to the flange. The anti-loosening effect is firm and reliable, and the disassembly and assembly are convenient. It solves the problem that the anti-loosening of the bearing box of the conventional throttle valve is realized by using a setscrew, and this method has problems such as a small contact surface and insufficient fastening strength, which is easy to loosen, and the thread is easy to slip during multiple disassembly, and over time, the thread rusts, which is easy to cause the problem that the throttle valve cannot be disassembled. Brief Description of the Drawings

[0022] Figure 1 It is an axonometric view of a throttle device for well control emergency according to the present invention.

[0023] Figure 2 It is a front view of a throttle device for well control emergency according to the present invention.

[0024] Figure 3 It is a sectional view of a throttle device for well control emergency according to the present invention.

[0025] Figure 4 It is a partial sectional view of the connecting mechanism of a throttle device for well control emergency according to the present invention.

[0026] Figure 5 It is a schematic structural view of the connecting flange of a throttle device for well control emergency according to the present invention.

[0027] Figure 6 It is a schematic structural view of the connecting mechanism in a throttle device for well control emergency according to the present invention.

[0028] Figure 7 It is a schematic structural view of the anchor plate in a throttle device for well control emergency according to the present invention.

[0029] Figure 8 It is a schematic structural view of the regular hexagon sleeve in a throttle device for well control emergency according to the present invention.

[0030] Figure 9 It is a schematic structural view of the installation device in a throttle device for well control emergency according to the present invention.

[0031] Figure 10 It is a schematic structural view of the lifting clamp in a throttle device for well control emergency according to the present invention.

[0032] Figure 11 This is an exploded view of a throttle device for well control emergency of the present invention.

[0033] Figure 12 This is a schematic diagram of the state of replacing the thrust bearing of a throttle device for well control emergency of the present invention.

[0034] Figure 13 This is a schematic diagram of the state of switching the driving mode of a throttle device for well control emergency of the present invention.

[0035] Figure 14 This is a schematic diagram of the state of replacing the valve stem seal device of a throttle device for well control emergency of the present invention.

[0036] Figure 15 This is a schematic diagram of the state of replacing the valve core or valve cover of a throttle device for well control emergency of the present invention.

[0037] In the figure: 1. Throttle valve assembly; 101. Valve body; 102. Valve cover; 103. Valve stem; 104. Valve stem seal device; 105. Valve core; 106. Valve seat; 2. Connecting mechanism; 201. Connecting flange; 202. Valve stem nut; 203. Thrust bearing; 204. Anti-loosening positioning screw hole; 205. Nut-anchored anti-loosening mechanism; 2051. Regular hexagon sleeve; 2052. Anchor plate; 2053. Alignment groove; 2054. Positioning screw; 3. Actuator; 4. Mounting device; 401. Fixed clamp; 402. Intermediate seat plate; 4021. Adjusting screw; 4022. Connecting ear; 403. Crossbeam seat; 4031. Seat plate; 4032. Roller; 404. Crossbeam; 4041. Winch mounting plate; 4042. Square tube beam; 5. Lifting clamp; 501. Bearing receiving groove; 502. Bearing installation pin hole; 6. Winch. Detailed implementation manners

[0038] The present invention will be further described in detail below in conjunction with embodiments, but the implementation manners of the present invention are not limited thereto.

[0039] Embodiment 1 As Figures 1-3 and Figure 11As shown in the figure, this embodiment provides a throttling device for well control emergency, which includes a throttle valve assembly 1, a connection mechanism 2 and an actuator 3. The throttle valve assembly 1 includes a valve body 101, a valve cover 102, a valve rod 103, a valve rod sealing device 104, a valve core 105 and a valve seat 106. The valve body 101 is provided with an inlet hole, an outlet hole and a closed hole. The closed hole and the outlet hole are located at both ends of the valve body 101 in the length direction and on the same axis. The inlet hole and the outlet hole are arranged at a 90-degree angle on the side of the valve body 101. The valve seat 106 is arranged in front of the outlet hole inside the valve body 101. The valve cover 102 is fixedly installed at the closed hole. A through hole is arranged at the center position of the valve cover 102. One end of the valve rod 103 passes through the through hole of the valve cover 102 and extends into the valve body 101 to be connected with the valve core 105. The surface of the other end of the valve rod 103 is provided with a transmission thread. A valve rod sealing device 104 is arranged at the connection between the valve rod 103 and the through hole. As Figures 3-5 shown in the figure, the connection mechanism 2 includes a connection flange 201, a valve rod nut 202 and a thrust bearing 203. One end of the connection flange 201 is connected with the actuator 3, and the other end is connected with the valve cover 102. The valve rod nut 202 is internally provided with a thread that matches the transmission thread of the valve rod 103. One end of the valve rod nut 202 is a regular hexagon structure, and the other end is a stepped shaft structure. The stepped shaft end of the valve rod nut 202 is connected with the valve rod 103 in the inner hole of the connection flange 201. Two thrust bearings 203 are installed on both sides of the outer circle of the stepped shaft end of the valve rod nut 202. The regular hexagon end of the valve rod nut 202 protrudes from the end face of the connection flange 201. The actuator 3 is an electric actuator 3. One end of the actuator 3 is the output end, and the other end is the manual end. The manual end is a structure with the same size as the regular hexagon structure of the valve rod nut 202. The output end is connected with the flange surface of the connection flange 201. A handwheel is arranged at the manual end.

[0040] In this embodiment, one end of the actuator 3 is set as the manual end. The manual end is a regular hexagon structure and has the same size as the regular hexagon structure of the valve rod nut 202. The output end is connected with the connection mechanism 2. A handwheel is arranged at the manual end. The throttle valve can change between manual and electric drive modes. And after the actuator 3 is disassembled, the handwheel of the actuator 3 can be directly installed on the regular hexagon structure of the valve rod nut 202 of the connection mechanism 2, so that the throttling device for well control emergency can still be manually operated and the throttle valve can continue to work.

[0041] Embodiment 2 As Figures 1-3 shown in the figure, compared with Embodiment 1, the difference of this embodiment is that: the throttling device for well control emergency further includes an installation device 4 and a winch 6. As Figure 9As shown, the installation device 4 is detachably connected to the end of the valve body 101 near the connection mechanism 2, and the winch 6 is fixedly installed on the top of the installation device 4; The installation device 4 includes a fixed clamp 401, an intermediate seat plate 402, a support column, a crossbeam seat 403 and a crossbeam 404. The fixed clamp 401 is installed on the valve body 101, and the top of the fixed clamp 401 is fixedly connected to the intermediate seat plate 402. The top of the intermediate seat plate 402 is fixedly connected to the support column. The top of the support column is fixedly connected to the crossbeam seat 403. A crossbeam 404 is arranged on the crossbeam seat 403, and the winch 6 is fixedly connected to the crossbeam 404. The fixed clamp 401 is of a multi-segment structure, and different segments of the fixed clamp 401 are connected by hinges. The fixed clamp 401 is connected by a connecting rod and a set screw to form a circle; Adjusting screws 4021 for adjusting the verticality of the installation device 4 are installed on both sides of the intermediate seat plate 402. The intermediate seat plate 402 is parallel to the surface of the valve body 101. The verticality adjustment is achieved by adjusting the protruding length of the adjusting screws 4021. Two connecting ears 4022 are arranged at both ends of the intermediate seat plate 402 in the length direction. Set screws are installed on the connecting ears 4022. After the set screws are tightened, the firmness of the connection between the installation device 4 and the valve body 101 can be increased; The crossbeam seat 403 includes a seat plate 4031, a roller 4032 and a bearing. The seat plate 4031 is of a right-angled U-shaped structure. One bearing mounting hole is provided at the upper part and two bearing mounting holes are provided at the lower part at corresponding positions on both sides of the seat plate 4031. The bearing is installed in the bearing mounting holes on the seat plate 4031. Both ends of the roller 4032 are installed in the bearing, and the roller 4032 rotates freely around the axis under the support of the bearing. The crossbeam 404 is composed of a winch mounting plate 4041 and a square tube beam 4042. The mounting plate is located at one end of the square tube beam 4042. The other end of the square tube beam 4042 passes through the crossbeam seat 403, and the roller 4032 supports the crossbeam 404 to be able to move horizontally in a straight line. The height of the square tube beam 4042 corresponds to the vertical distance between the upper and lower rollers 4032. The winch 6 is fixedly installed on the winch mounting plate 4041 of the crossbeam 404; As Figure 10 As shown, the throttle device for well control emergency also includes a lifting clamp 5. The lifting clamp 5 includes a clamp and a lifting lug. The lifting lug is fixedly connected to the clamp. The lifting clamp 5 is of a multi-segment structure and is connected by a connecting rod and a fastening nut to form a circle. The lifting clamp 5 is detachably installed on the actuator 3 or the connecting flange 201; A bearing receiving groove 501 and bearing mounting pin holes 502 are provided in the lifting clamp 5. The bearing mounting pin holes 502 are evenly distributed around the circumference with respect to the center of the circle. The bearing is placed in the receiving groove and positioned in the lifting clamp 5 through a pin shaft. The bearing on the lifting clamp 5 contacts the actuator 3 or the connecting flange 201, and the actuator 3 and the connecting flange 201 can rotate in the lifting clamp 5 during the installation process; the remaining structures are the same as those in Embodiment 1.

[0042] As Figure 11 shown, the installation process of the throttle device for well control emergency in this embodiment is as follows: The fixed clamp 401 of the installation device 4 is held on the outer circumference of the front end of the valve body 101. After the winch 6 is installed on the cross beam 404, the cross beam 404 is inserted into the cross beam seat 403. After the connecting flange 201 is connected to the actuator 3, the lifting clamp 5 is used to hold the actuator 3, and screws are tightened until the lifting clamp 5 tightly holds the actuator 3 and ensures that the actuator 3 can rotate within the clamp. The wire rope hook of the winch 6 is hooked to the lifting lug of the lifting clamp 5, and the actuator 3 and the connecting flange 201 are lifted by the winch 6 until they are flush with the valve stem 103. The connecting flange 201 is rotated, and the connecting threads between the valve stem nut 202 and the valve stem 103 and the connecting threads between the connecting flange 201 and the valve cover 102 are screwed together successively.

[0043] As Figure 12 shown, when the thrust bearing 203 needs to be replaced, the lifting clamp 5 holds the actuator 3, the winch 6 suspends the lifting clamp 5, the connecting bolts between the actuator 3 and the connecting flange 201 are loosened, the valve stem nut 202 is exposed, and the bearing is removed.

[0044] As Figure 13 shown, when the actuator 3 needs to be disassembled and maintained, the lifting clamp 5 holds the actuator 3, the actuator 3 can be removed for repair, and the handwheel is removed and directly installed on the regular hexagon structure at the end of the valve stem nut 202. The throttle valve can still be manually operated for normal opening and closing.

[0045] As Figure 14 shown, when the valve stem sealing device 104 needs to be replaced, the lifting clamp 5 holds the actuator 3, the nut anchoring type anti-loosening mechanism 205 is loosened, the connecting flange 201 is rotated, and the actuator 3 and the connecting flange 201 are removed from the valve cover 102. Then the valve stem sealing device 104 can be taken out for replacement.

[0046] As Figure 15 shown, when the valve core 105 or the valve cover 102 needs to be replaced, the lifting clamp 5 holds the connecting flange 201, the nut anchoring type anti-loosening mechanism 205 is loosened and removed, the bolts of the valve stem 103 are disassembled, and then the actuator 3, the connecting structure, the valve cover 102, the valve stem 103 and the valve core 105 can be pulled out as a whole for the replacement operation of the valve core 105 or the valve seat 106.

[0047] Example 3 As Figures 1-3 shown, compared with Example 1, the difference in this example is that in this example, the valve cover 102 is connected to the valve body 101 by bolts and nuts, and the connecting mechanism 2 is provided with a nut-anchoring type loosening prevention mechanism 205. The nut-anchoring type loosening prevention mechanism 205 includes a regular hexagon sleeve 2051, a bolt, an anchor plate 2052 and a nut; one end of the regular hexagon sleeve 2051 has an external thread, and the other end is a hollow cylinder structure. The inside of the hollow cylinder structure is a regular hexagon structure that matches the nut on the valve cover 102. The cylinder at the end of the connecting flange 201 connected to the valve cover 102 is provided with a loosening prevention positioning screw hole 204, and the loosening prevention positioning screw hole 204 is provided with an internal thread. The anchor plate 2052 is a fan-shaped structure, and the inner side of the fan-shaped structure matches the outer side of the connecting flange 201. There are two connecting holes on the inner side of the anchor plate 2052 that match the loosening prevention positioning screw holes 204 of the connecting flange 201, and there are two connecting holes on the outer side of the anchor plate 2052 that match the external thread end of the regular hexagon sleeve 2051. The external thread end of the regular hexagon sleeve 2051 passes through the connecting hole of the anchor plate 2052 and then is connected to the nut, and the bolt passes through the connecting hole of the anchor plate 2052 and then is screwed into the loosening prevention positioning screw hole 204 of the connecting flange 201; Two screw holes with staggered axes of 60° are provided at one end of the hollow cylinder of the regular hexagon sleeve 2051. The positioning screw 2054 passes through the screw holes to further fasten the nut and eliminate the gap between the regular hexagon sleeve 2051 and the nut on the valve cover 102. An alignment groove 2053 is provided at the middle position on the inner side of the anchor plate 2052 corresponding to the connecting flange 201; the rest of the structure is the same as that of Example 2.

[0048] In this example, during the installation process, the connecting flange 201 and the valve cover 102 are connected by threads. The hexagon sleeve is sleeved on the nut of the valve cover 102. When installing the anchor plate 2052, the hexagon sleeve is inserted into the connecting hole of the anchor plate 2052. The connecting flange 201 rotates along the helix of the thread on the valve cover 102. When it rotates to the alignment groove 2053 of the anchor plate 2052 and the connecting flange 201 is aligned, the installation can be completed by installing and tightening the bolt.

[0049] In this example, the connecting nut of the valve cover 102 is fixed to the connecting flange 201 through the anchor plate 2052. The connecting flange 201 will not loosen relative to the flange. The loosening prevention effect is firm and reliable, and the disassembly and assembly are convenient. It solves the problem that the loosening prevention of the bearing box of the conventional throttle valve is realized by using a set screw, and this method has problems such as a small contact surface and insufficient fastening strength, which is easy to loosen, and the thread is easy to slip during multiple disassembly, and over time, the thread rusts, which is easy to cause the throttle valve to be unable to be disassembled.

[0050] It is understood that the present invention is described by way of some embodiments, and those skilled in the art will be aware that, without departing from the spirit and scope of the present invention, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the present invention.

Claims

1. A throttling device for well control emergency, comprising a throttle valve assembly (1), a connecting mechanism (2) and an actuator (3). Characterized in that: The throttle valve assembly (1) includes a valve body (101), a valve cover (102), a valve rod (103), a valve rod sealing device (104), a valve core (105) and a valve seat (106). The valve body (101) is provided with an inlet hole, an outlet hole and a closed hole. The closed hole and the outlet hole are located at both ends of the valve body (101) in the length direction and on the same axis. The inlet hole and the outlet hole are arranged at 90 degrees on the side of the valve body (101). The valve seat (106) is arranged in front of the outlet hole inside the valve body (101). The valve cover (102) is fixedly installed at the closed hole. A through hole is arranged at the center position of the valve cover (102). One end of the valve rod (103) passes through the through hole of the valve cover (102) and extends into the valve body (101) to be connected with the valve core (105). A transmission thread is arranged on the surface of the other end of the valve rod (103). A valve rod sealing device (104) is arranged at the connection between the valve rod (103) and the through hole. The connecting mechanism (2) includes a connecting flange (201), a valve rod nut (202) and a thrust bearing (203). One end of the connecting flange (201) is connected with the actuator (3), and the other end is connected with the valve cover (102). The valve rod nut (202) is internally provided with a thread that matches the transmission thread of the valve rod (103). One end of the valve rod nut (202) is a regular hexagon structure, and the other end is a stepped shaft structure. The stepped shaft end of the valve rod nut (202) is connected with the valve rod (103) in the inner hole of the connecting flange (201). Two thrust bearings (203) are installed on both sides of the outer circle of the stepped shaft end of the valve rod nut (202). The regular hexagon end of the valve rod nut (202) exposes the end face of the connecting flange (201). The actuator (3) is an electric actuator (3). One end of the actuator (3) is an output end, and the other end is a manual end. The manual end has the same structural dimensions as the regular hexagon structure of the valve rod nut (202). The output end is connected with the flange surface of the connecting flange (201). A handwheel is arranged at the manual end.

2. The throttling device for well control emergency according to claim 1, Characterized in that: The throttling device for well control emergency further includes a mounting device (4) and a winch (6). The mounting device (4) is detachably connected to the end of the valve body (101) close to the connecting mechanism (2). The winch (6) is fixedly installed on the top of the mounting device (4).

3. The throttling device for well control emergency according to claim 2, Characterized in that: The installation device (4) includes a fixed clamp (401), an intermediate seat plate (402), a support column, a crossbeam seat (403) and a crossbeam (404). The fixed clamp (401) is installed on the valve body (101). The top end of the fixed clamp (401) is fixedly connected to the intermediate seat plate (402). The top end of the intermediate seat plate (402) is fixedly connected to the support column. The top end of the support column is fixedly connected to the crossbeam seat (403). A crossbeam (404) is provided on the crossbeam seat (403). The winch (6) is fixedly connected to the crossbeam (404).

4. The throttle device for well control emergency according to claim 3, characterized in that: The fixed clamp (401) is of a multi-segment structure. Different segments of the fixed clamp (401) are connected by hinges. The fixed clamp (401) is connected by a connecting rod and a set screw to form a circle.

5. The throttle device for well control emergency according to claim 3, characterized in that: Adjusting screws (4021) for adjusting the verticality of the installation device (4) are installed on both sides of the intermediate seat plate (402). The intermediate seat plate (402) is parallel to the surface of the valve body (101). The verticality adjustment is achieved by adjusting the protruding length of the adjusting screw (4021). Two connecting ears (4022) are provided at both ends of the intermediate seat plate (402) in the length direction. Set screws for increasing the connection firmness between the installation device (4) and the valve body (101) are installed on the connecting ears (4022).

6. The throttle device for well control emergency according to claim 3 or 4, characterized in that: The crossbeam seat (403) includes a seat plate (4031), a roller (4032) and a bearing. The seat plate (4031) is of a right-angled U-shaped structure. One or more bearing mounting holes are provided at the upper part and two or more bearing mounting holes are provided at the lower part on both sides of the seat plate (4031) at corresponding positions. The bearing is mounted in the bearing mounting holes on the seat plate (4031). Both ends of the roller (4032) are mounted in the bearing. The roller (4032) rotates freely around the axis under the support of the bearing. The crossbeam (404) is composed of a winch mounting plate (4041) and a square tube beam (4042). The mounting plate is located at one end of the square tube beam (4042). The other end of the square tube beam (4042) passes through the crossbeam seat (403). The roller (4032) supports the crossbeam (404) to be able to move horizontally in a straight line. The height of the square tube beam (4042) corresponds to the vertical distance between the upper and lower rollers (4032). The winch (6) is fixedly installed on the winch mounting plate (4041) of the crossbeam (404).

7. The throttle device for well control emergency according to claim 1, characterized in that: The throttle device for well control emergency further includes a lifting clamp (5). The lifting clamp (5) includes a clamp and a lifting lug. The lifting lug is fixedly connected to the clamp. The lifting clamp (5) is of a multi-segment structure and is connected by a connecting rod and a fastening nut to form a circle. The lifting clamp (5) is detachably installed on the actuator (3) or the connecting flange (201).

8. The throttle device for well control emergency according to claim 7, characterized in that: a bearing receiving groove (501) and bearing mounting pin holes (502) are arranged in the lifting clamp (5), the bearing mounting pin holes (502) are evenly distributed around the circumference around the center of the circle, the bearing is placed in the receiving groove and positioned in the lifting clamp (5) through a pin shaft, the bearing on the lifting clamp (5) contacts the actuator (3) or the connecting flange (201), and the actuator (3) and the connecting flange (201) can rotate in the lifting clamp (5) during the installation process.

9. The throttle device for well control emergency according to claim 1, characterized in that: the valve cover (102) is connected to the valve body (101) by bolts and nuts, the connecting mechanism (2) is provided with a nut anchoring type anti-loosening mechanism (205), and the nut anchoring type anti-loosening mechanism (205) includes a regular hexagon sleeve (2051), a bolt, an anchoring plate (2052) and a nut; one end of the regular hexagon sleeve (2051) is an external thread, and the other end is a hollow cylinder structure, and the inside of the hollow cylinder structure is a regular hexagon structure matching the nut on the valve cover (102), a loosening prevention positioning screw hole (204) is arranged on the cylinder at one end of the connecting flange (201) connected to the valve cover (102), an internal thread is arranged in the loosening prevention positioning screw hole (204), the anchoring plate (2052) is a sector structure, the inner side surface of the sector structure matches the outer side surface of the connecting flange (201), there are two connecting holes on the inner side of the anchoring plate (2052) matching the loosening prevention positioning screw holes (204) of the connecting flange (201), and there are two connecting holes on the outer side of the anchoring plate (2052) matching the external thread end of the regular hexagon sleeve (2051), the external thread end of the regular hexagon sleeve (2051) passes through the connecting hole of the anchoring plate (2052) and is connected to the nut, and the bolt passes through the connecting hole of the anchoring plate (2052) and is screwed into the loosening prevention positioning screw hole (204) of the connecting flange (201).

10. The throttle device for well control emergency according to claim 9, characterized in that: two screw holes with axes staggered by 60° are arranged at one end of the hollow cylinder of the regular hexagon sleeve (2051), the positioning screw (2054) passes through the screw holes to further fasten the nut and eliminate the gap between the regular hexagon sleeve (2051) and the nut on the valve cover (102), and an alignment groove (2053) is arranged at the middle position on the inner side of the anchoring plate (2052) corresponding to the connecting flange (201).

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