Anchoring type underground throttler capable of preventing reverse rotation and loosening

Abstract

The invention discloses an anchoring type downhole throttler capable of preventing reverse rotation and loosening, and relates to the technical field of downhole throttlers. The throttling device comprises a throttling device body, the top of the throttling device body is fixedly connected with a connecting cover spiral shaft, the bottom of the throttling device body is fixedly connected with a flow guide pipe, the side face of the throttling device body is fixedly connected with an anchoring sleeve, and an anchoring barb mechanism is arranged on the side face of the anchoring sleeve. Through the arrangement of the anchoring barb mechanism, after the device is in place, the anchor hook shaft slides in the sliding groove of the semi-arc groove to adjust the position, the spring telescopic rod releases elastic potential energy, the anchor hook shaft is pushed to extend outwards through the hinge shaft, and meanwhile, the torsion spring drives the anchor hook rod to rotate through self torsion to drive the anchor hook body to be opened and attached to the well wall. The notch in the outer surface of the anchor hook body is matched with a well wall protruding structure, the positioning nail set in the positioning groove is embedded into a well wall rock stratum or a casing pipe gap, stable preliminary anchoring is formed, and the device is prevented from sliding or rotating along the well wall.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of downhole throttles, in particular to an anchor type downhole throttle capable of preventing reverse rotation and loosening. BACKGROUND

[0002] A throttle is an element for regulating fluid flow and generating pressure drop in a hydraulic system. Various different throttles are used in different aspects of industrial construction and play their respective roles in industrial construction.

[0003] According to a wear-resistant downhole throttle (publicity No. CN120925816B), the throttle comprises a sleeve, a center pipe coaxially fixed in the sleeve, a plurality of gas outlets arranged at equal angles on the lower side of the center pipe, a first piston coaxially connected to the center pipe, and a throttle ring arranged below the first piston and used for adjusting the opening size of the gas outlets. The wear-resistant downhole throttle adopts a control mechanism, so that when the gas pressure in the pipeline changes slightly, the first piston is automatically locked, the position of the throttle ring is automatically locked, the throttle ring is prevented from frequently producing slight action when the gas pressure fluctuation amplitude is small, and the service life of the throttle ring is prolonged; and when the gas pressure in the pipeline changes greatly, the first piston is automatically unlocked, the position of the throttle ring is adjusted, and the stability of the flow in the pipeline is ensured.

[0004] In the above application, the throttle ring, the center pipe and other components cooperate with each other, but it is difficult to realize the positioning function of the downhole throttle in the complex downhole environment, resulting in positioning omissions of the throttle due to the lack of an anchoring mechanism during the working process, causing accidents of the throttle falling. In the prior art, although an anchoring mechanism is designed to fix and position the throttle, the positioning mode of the hook causes the throttle body to be prone to accidents of being fixed by the anchor hook and the downhole rock wall before reaching the specified position during the falling process. Therefore, the application provides an anchor type downhole throttle capable of preventing reverse rotation and loosening. SUMMARY

[0005] In view of the deficiencies of the prior art, the application provides an anchor type downhole throttle capable of preventing reverse rotation and loosening. The anchor hook body is opened and attached to the well wall through the setting of the anchor barb mechanism. The gap on the outer surface of the anchor hook body is matched with the protruding structure of the well wall, the positioning peg group in the positioning groove is embedded in the well wall rock layer or casing gap, and stable primary anchoring is formed, thereby solving the problems in the above background art.

[0006] To achieve the above object, the present application is realized by the following technical solutions: A kind of anti-reverse loosening anchoring downhole choke, including choke body, the top of the choke body is fixedly connected with the continuous cover spiral shaft, the bottom of the choke body is fixedly connected with the flow guide pipe, the side of the choke body is fixedly connected with anchoring sleeve, the anchoring sleeve side is provided with anchoring barb mechanism;

[0007] The anchoring barb mechanism includes a semicircular groove, a sliding groove is slidably connected inside the semicircular groove, an anchor hook shaft is slidably connected inside the sliding groove, a hinge shaft is hingedly connected to the top of the anchor hook shaft, a spring telescopic rod is fixedly connected to the top of the hinge shaft, a semicircular fixed plate is fixedly connected to the top of the spring telescopic rod, the side of the semicircular fixed plate is fixedly connected inside the semicircular groove, an anchor hook rod is hingedly connected to one end of the anchor hook shaft, and an anchor body is hingedly connected to one end of the anchor hook rod.

[0008] According to the above technical solution, an opening is formed on the outer surface of the anchor body, a positioning groove is formed inside the opening, a plurality of positioning nails are fixedly connected inside the positioning groove, and the non-positioning surface of the anchor body is an arc surface. The non-positioning surface of the anchor body is an arc surface, which makes the anchor body more smooth during the downward movement and prevents the occurrence of hooking accidents during the downward movement.

[0009] According to the above technical solution, a torsional spring is fixedly sleeved to one end of the anchor hook shaft, and one end of the torsional spring is fixedly connected to one end of the hinge shaft. The purpose of the design of the torsional spring is to make the anchor body better adhere to the inner wall of the well by the torsional force.

[0010] According to the above technical solution, a clamping positioning mechanism is arranged inside the spiral groove of the continuous cover spiral shaft, the clamping positioning mechanism includes a tightening sleeve, the inner side surface of the tightening sleeve is threadedly connected with the spiral groove of the continuous cover spiral shaft, a chuck is fixedly connected to the circumferential surface of the tightening sleeve, a clamping groove is formed in the bottom of the chuck, a threaded hole is formed in the side of the clamping groove, an adjusting screw is bolt-connected to the threaded hole, and a ball clamping plate is slidably connected to the outer side surface of the adjusting screw. The design of the clamping positioning mechanism realizes the secondary fixation of the upper end of the choke body after the positioning of the anchoring barb mechanism, so as to provide stable support force for the anchoring barb mechanism and ensure stable fixation under long-term operation of the choke body.

[0011] According to the above technical solution, a limiting groove is formed in the inside of the clamping groove, and the ball clamping plate is slidably connected inside the limiting groove. The design of the limiting groove limits the displacement of the ball clamping plate, so that it can displace horizontally inside the limiting groove.

[0012] According to the technical scheme, the clamping positioning mechanism is provided with two groups and is symmetrical along the vertical central axis of the choke body, so that the clamping state of the clamping positioning mechanism is more stable.

[0013] According to the technical scheme, the bottom of the chuck is fixedly connected with a clamping nail group, the clamping nail group can be used for secondary positioning of the clamping positioning mechanism in the vertical direction under adaptive terrain, so that the clamping positioning mechanism is more accurately positioned.

[0014] According to the technical scheme, the top of the chuck is provided with an unhooking mechanism, the unhooking mechanism comprises an unhooking groove, one end of the unhooking groove is fixedly connected with a limiting sleeve, and the other end of the unhooking groove is located directly above the anchor hook rod. The unhooking mechanism can be used for quickly pulling out the choke body after the anchoring and hooking mechanism finishes work, so that the choke body can be quickly disassembled.

[0015] The present application provides an anchor type downhole choke device capable of preventing reverse loosening.

[0016] (1) The present application is provided with an anchoring and hooking mechanism, so that after the device is positioned, the anchor hook shaft slides in the sliding groove of the semicircular groove to adjust the position, the spring telescopic rod releases the elastic potential energy, the anchor hook shaft is pushed outwards through the hinge shaft, the torsional spring drives the anchor hook rod to rotate through the torsional force, the anchor hook body is opened and adhered to the well wall, the openings on the outer surface of the anchor hook body are matched with the protruding structure of the well wall, the positioning nails in the positioning groove are embedded in the well wall rock layer or the gap of the casing, and stable primary anchoring is formed to prevent the device from sliding or rotating along the well wall.

[0017] (2) The present application is provided with a clamping positioning mechanism, so that the clamping nail group at the bottom of the chuck first contacts the downhole preset positioning surface to realize preliminary limiting in the vertical direction, then the rotating adjusting screw is rotated to push the ball clamping plate to slide horizontally along the limiting groove until the ball clamping plate is tightly adhered to the outer wall or the clamping groove of the downhole matching structure. The two symmetrically arranged clamping positioning mechanisms apply clamping force from both sides to form a double fixing structure corresponding to the anchoring and hooking mechanism to provide stable support force for the choke body, so that the risk of reverse loosening caused by fluid impact and formation vibration during long-term operation is completely eliminated.

[0018] (3) The present application is provided with an unhooking mechanism, so that when the device needs to be disassembled after the throttling operation is completed, the downhole operating tool is inserted into the unhooking groove to guide and push the anchor hook rod along the limiting sleeve. After the anchor hook rod is stressed, the anchor hook body is rotated to make the positioning nail group separate from the well wall positioning groove, the torsional spring and the spring telescopic rod are compressed, the anchor hook shaft is withdrawn into the semicircular groove along the sliding groove, the unhooking action of the anchoring and hooking mechanism is completed, and the effect of quick disassembly is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional appearance of the whole application;

[0020] Figure 2 A schematic diagram of the three-dimensional side section of the throttler body of the whole application;

[0021] Figure 3 A schematic diagram of the three-dimensional enlarged view of the anchor body of the whole application;

[0022] Figure 4 A schematic diagram of the three-dimensional enlarged view of the anchor rod of the whole application;

[0023] Figure 5 A schematic diagram of the three-dimensional enlarged view of the clamping positioning mechanism of the whole application;

[0024] Figure 6 A schematic diagram of the three-dimensional enlarged view of the top of the chuck of the whole application;

[0025] Figure 7 A schematic diagram of the three-dimensional enlarged view of the whole Figure 2 application A;

[0026] In the figure: 1, throttler body; 2, cover connecting screw shaft; 3, flow guide pipe; 4, anchoring sleeve; 5, anchoring barb mechanism; 51, semicircular groove; 52, sliding groove; 53, anchor shaft; 54, hinged shaft; 55, spring telescopic rod; 56, semicircular fixed plate; 57, anchor rod; 58, anchor body; 59, opening; 510, positioning groove; 511, positioning nail group; 512, torsion spring; 6, clamping positioning mechanism; 61, screwing screw sleeve; 62, chuck; 63, clamping groove; 64, threaded hole; 65, adjusting screw; 66, ball clamping plate; 67, limiting groove; 68, clamping nail group; 7, unhooking mechanism; 71, unhooking groove; 72, limiting sleeve. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application.

[0028] Please refer to Figures 1-7 , one embodiment of the application is: an anchoring type downhole throttler capable of preventing reverse rotation and loosening, comprising a throttler body 1, a cover connecting screw shaft 2 fixedly connected to the top of the throttler body 1, a flow guide pipe 3 fixedly connected to the bottom of the throttler body 1, an anchoring sleeve 4 fixedly connected to the side of the throttler body 1, and an anchoring barb mechanism 5 arranged on the side of the anchoring sleeve 4;

[0029] The anchoring hook mechanism 5 includes a semi-circular groove 51, a sliding groove 52 is slidably connected inside the semi-circular groove 51, an anchor hook shaft 53 is slidably connected inside the sliding groove 52, a hinge shaft 54 ​​is hinged to the top of the anchor hook shaft 53, a spring telescopic rod 55 is fixedly connected to the top of the hinge shaft 54, a semi-circular fixing plate 56 is fixedly connected to the top of the spring telescopic rod 55, the side of the semi-circular fixing plate 56 is fixedly connected inside the semi-circular groove 51, an anchor hook rod 57 is hinged to one end of the anchor hook shaft 53, and an anchor hook body 58 is hinged to one end of the anchor hook rod 57.

[0030] An opening 59 is provided on the outer surface of the anchor hook body 58, and a positioning groove 510 is provided inside the opening 59. A positioning pin assembly 511 is fixedly connected inside the positioning groove 510. The non-positioning surface of the anchor hook body 58 is set as an arc surface. Setting the non-positioning surface of the anchor hook body 58 as an arc surface makes the anchor hook body 58 move more smoothly during the downward movement and prevents hooking accidents during the downward movement.

[0031] A torsion spring 512 is fixedly sleeved at one end of the anchor hook shaft 53, and one end of the torsion spring 512 is fixedly connected to one end of the hinge shaft 54. The purpose of the torsion spring 512 is to use its torsion force to make the anchor hook body 58 better adhere to the inner wall of the well.

[0032] Before using this downhole throttle, check the status of each mechanism: ensure that the spring telescopic rod 55 of the anchoring hook mechanism 5 extends and retracts flexibly, the torsion spring 512 is not deformed, the adjusting screw 65 of the clamping and positioning mechanism 6 rotates smoothly, the ball clamping plate 66 slides freely in the limiting groove 67, and the unhooking groove 71 of the unhooking mechanism 7 is not blocked. Then lower the entire device to the preset working position downhole, so that the connecting screw shaft 2 is initially aligned with the downhole matching connection structure, and the guide pipe 3 is aligned with the fluid delivery channel;

[0033] During the lowering process, the anchoring hook mechanism 5 plays a preliminary positioning role: the non-positioning surface of the anchor hook body 58 is designed as an arc surface, effectively preventing accidental hooking with the well wall during lowering and ensuring that the device smoothly reaches the designated depth. After the device is in place, the anchor hook shaft 53 slides and adjusts its position within the groove 52 of the semi-arc groove 51. The spring telescopic rod 55 releases its elastic potential energy, pushing the anchor hook shaft 53 outward through the hinge shaft 54. At the same time, the torsion spring 512 drives the anchor hook rod 57 to rotate through its own torque, causing the anchor hook body 58 to open and fit against the well wall. The notch 59 on the outer surface of the anchor hook body 58 is adapted to the protruding structure of the well wall, and the positioning pin group 511 in the positioning groove 510 is embedded in the rock strata or casing gaps of the well wall, forming a stable preliminary anchoring and preventing the device from sliding or rotating along the well wall.

[0034] Please see Figures 1-7Based on the above embodiments, in another embodiment of the present invention, the clamping and positioning mechanism 6 includes a tightening screw sleeve 61. The inner side of the tightening screw sleeve 61 is threadedly connected to the spiral groove of the connecting cover spiral shaft 2. A chuck 62 is fixedly connected to the circumferential surface of the tightening screw sleeve 61. A clamping groove 63 is provided at the bottom of the chuck 62. A threaded hole 64 is provided on the side of the clamping groove 63. An adjusting screw 65 is bolted to the threaded hole 64. A ball clamping plate 66 is slidably connected to the outer side of the adjusting screw 65. The clamping and positioning mechanism 6 is designed to achieve secondary fixation of the upper end of the throttle body 1 after the anchoring hook mechanism 5 is positioned, so as to provide stable support force for the anchoring hook mechanism 5 and ensure stable fixation during long-term operation of the throttle body 1.

[0035] A limiting groove 67 is formed inside the clamping groove 63, and the ball clamping plate 66 is slidably connected inside the limiting groove 67. The design of the limiting groove 67 restricts the displacement of the ball clamping plate 66, allowing it to move horizontally within the limiting groove 67.

[0036] Two sets of clamping and positioning mechanisms 6 are provided and are symmetrical to each other along the vertical central axis of the throttle body 1. This design makes the clamping and positioning mechanism 6 more stable in the clamping state.

[0037] The bottom of the chuck 62 is fixedly connected to a pin assembly 68. The design of the pin assembly 68 can play a secondary positioning role in the vertical direction for the clamping and positioning mechanism 6 under adaptive terrain, making the positioning of the clamping and positioning mechanism 6 more accurate.

[0038] The top of the chuck 62 is equipped with a release mechanism 7, which includes a release groove 71. The release groove 71 is located on the top of the chuck 62, with one end of the release groove 71 fixedly connected to a limit sleeve 72, and the other end of the release groove 71 located directly above the anchor rod 57. The design of the release mechanism 7 allows the operator to quickly pull out the throttle body 1 after the anchoring hook mechanism 5 has finished working, achieving the effect of quick disassembly of the throttle body.

[0039] During use, after initial anchoring, the clamping and positioning mechanism 6 is activated for secondary fixation: the tightening sleeve 61 is rotated using a tool, causing it to move downwards along the spiral groove of the connecting cover spiral shaft 2, which in turn moves the chuck 62 downwards synchronously. The pin group 68 at the bottom of the chuck 62 first contacts the pre-set positioning surface downhole, achieving initial vertical limitation; then the adjusting screw 65 is rotated to push the ball clamping plate 66 to slide horizontally along the limiting groove 67 until the ball clamping plate 66 tightly fits the outer wall or groove of the downhole matching structure. The two symmetrically arranged clamping and positioning mechanisms 6 apply clamping force from both sides, forming a double fixing structure with the anchoring hook mechanism 5, providing stable support for the throttle body 1 and completely eliminating the risk of reverse loosening caused by fluid impact and formation vibration during long-term operation.

[0040] When the device is put into use, the guide pipe 3 undertakes the function of fluid guidance, guiding the downhole fluid through the throttle body 1 along a preset path to achieve the throttling operation requirements such as flow regulation and pressure control. During this process, the positioning pin group 511 of the anchoring hook mechanism 5 is continuously embedded in the well wall, and the torsion spring 512 and the spring telescopic rod 55 are always kept in a tensile state to counteract the force generated by the fluid impact; the ball clamping plate 66 of the clamping positioning mechanism 6 maintains the clamping state by adjusting the preload of the screw 65, and the pin group 68 further strengthens the vertical positioning to ensure that the entire device remains stable under complex working conditions.

[0041] When the throttling operation is completed and the device needs to be disassembled, the downhole operating tool is inserted into the unhooking groove 71 and pushed along the guide sleeve 72 to push the anchor rod 57. After the anchor rod 57 is stressed, it drives the anchor body 58 to rotate, causing the positioning pin assembly 511 to disengage from the well wall positioning groove. At the same time, the torsion spring 512 and the spring telescopic rod 55 are compressed, and the anchor shaft 53 retracts along the slide groove 52 into the semi-arc groove 51, completing the unhooking action of the anchoring hook mechanism 5. Then, the screw sleeve 61 is rotated in the opposite direction, causing the chuck 62 to move upward, the pin assembly 68 to disengage from the positioning surface, and the adjusting screw 65 is rotated to retract the ball clamping plate 66 into the clamping groove 63, releasing the fixation of the clamping positioning mechanism 6. Finally, the device is lifted upward by the hoisting equipment, and the guide pipe 3 and the connecting cover spiral shaft 2 are successively disengaged from the downhole supporting structure, realizing the rapid and safe disassembly of the device.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An anchored downhole choke to prevent reverse detachment, comprising a choke body (1), characterized in that: The top of the throttle body (1) is fixedly connected to a connecting spiral shaft (2), the bottom of the throttle body (1) is fixedly connected to a guide pipe (3), the side of the throttle body (1) is fixedly connected to an anchor sleeve (4), and the side of the anchor sleeve (4) is provided with an anchoring hook mechanism (5). The anchoring hook mechanism (5) includes a semi-circular groove (51), a sliding groove (52) is slidably connected inside the semi-circular groove (51), an anchor hook shaft (53) is slidably connected inside the sliding groove (52), a hinge shaft (54) is hinged to the top of the anchor hook shaft (53), a spring telescopic rod (55) is fixedly connected to the top of the hinge shaft (54), a semi-circular fixing plate (56) is fixedly connected to the top of the spring telescopic rod (55), and the side of the semi-circular fixing plate (56) is fixedly connected inside the semi-circular groove (51). An anchor hook rod (57) is hinged to one end of the anchor hook shaft (53), and an anchor hook body (58) is hinged to one end of the anchor hook rod (57).

2. The anti-reverse loosening anchored downhole choke according to claim 1, characterized in that: The anchor hook body (58) has a notch (59) on its outer surface, and a positioning groove (510) is provided inside the notch (59). A positioning pin group (511) is fixedly connected inside the positioning groove (510). The non-positioning surface of the anchor hook body (58) is set as an arc surface.

3. The anti-reverse loosening anchored downhole choke according to claim 2, characterized in that: One end of the anchor hook shaft (53) is fixedly sleeved with a torsion spring (512), and one end of the torsion spring (512) is fixedly connected to one end of the hinge shaft (54).

4. The anti-reverse loosening anchored downhole choke according to claim 3, characterized in that: The spiral groove of the connecting cover spiral shaft (2) is provided with a clamping and positioning mechanism (6). The clamping and positioning mechanism (6) includes a tightening screw sleeve (61). The inner side of the tightening screw sleeve (61) is threadedly connected to the spiral groove of the connecting cover spiral shaft (2). A chuck (62) is fixedly connected to the circumferential surface of the tightening screw sleeve (61). A clamping groove (63) is opened at the bottom of the chuck (62). A threaded hole (64) is opened on the side of the clamping groove (63). An adjusting screw (65) is bolted to the threaded hole (64). A ball clamping plate (66) is slidably connected to the outer side of the adjusting screw (65).

5. The anti-reverse loosening anchored downhole choke according to claim 4, characterized in that: The locking groove (63) has a limiting groove (67) inside, and the ball locking plate (66) is slidably connected inside the limiting groove (67).

6. The anti-reverse loosening anchored downhole choke according to claim 5, characterized in that: The clamping and positioning mechanism (6) is provided in two sets, and is symmetrical to each other along the vertical central axis of the throttle body (1).

7. The anti-reverse loosening anchored downhole choke according to claim 6, characterized in that: The bottom of the chuck (62) is fixedly connected to a set of pins (68).

8. The anti-reverse loosening anchored downhole choke according to claim 7, characterized in that: The top of the chuck (62) is provided with a disengagement mechanism (7), which includes a disengagement groove (71). The disengagement groove (71) is opened on the top of the chuck (62). One end of the disengagement groove (71) is fixedly connected to a limit sleeve (72), and one end of the disengagement groove (71) is located directly above the anchor rod (57).

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