A new type of anti-disconnection sand control gas well choke

Abstract

This utility model discloses a novel anti-breakage and anti-sand gas well choke in the field of oil and gas field development equipment technology. It includes a release mechanism, a choke mechanism, an unsealing mechanism, a straightening mechanism, an anchoring mechanism, an anti-breakage mechanism, a sealing mechanism, a locking mechanism, an anti-sand mechanism, and a choke body. These mechanisms are sequentially connected to the choke body. The anti-breakage mechanism includes a one-way sliding lock sleeve, which cooperates with the anchoring and locking mechanisms. Through the combined action of the anchoring and locking mechanisms, along with a double-layer sealing and anti-sand design, this utility model ensures that the choke does not break off under downhole impact or vibration conditions, significantly reducing the risk of downhole debris, improving gas well safety, and reducing methanol dependence and wellhead equipment pressure risks.

Description

Technical Field

[0001] This utility model relates to the technical field of oil and gas field development equipment, specifically a new type of anti-breakage and anti-sand gas well throttle. Background Technology

[0002] Wellbore throttling and pressure reduction fully utilizes geothermal heating to alter the formation conditions of hydrates, reducing methanol injection volume, lowering the pressure on wellhead equipment and surface pipelines, and improving their safety; it also increases the liquid-carrying capacity of the gas flow, reducing the amount of liquid accumulated in the wellbore and surface pipelines; avoids formation agitation, extends the life of the gas well, and stabilizes the gas well's production capacity.

[0003] Traditional gas well chokes are prone to problems such as breakage, sand jamming, and seal failure under high pressure, high temperature, and sand-containing environments, leading to increased downhole debris risk, high maintenance costs, and shortened well lifespan. In existing technologies, sand prevention and breakage prevention functions are often designed separately, with a single unsealing method and a lack of efficient sealing and anchoring mechanisms. There is an urgent need for a choke that integrates breakage prevention, sand prevention, rapid unsealing, and high-reliability sealing to address these technical deficiencies.

[0004] Based on this, this utility model designs a new type of anti-breakage and anti-sand gas well throttle device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of anti-breakage and anti-sand gas well throttle device to solve the problems mentioned in the background art, where the sand prevention and anti-breakage functions are often designed separately, the unsealing method is simple, and there is a lack of efficient sealing and anchoring mechanisms.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A novel anti-detachment and sand-prevention gas well throttle, comprising a release mechanism, a throttle mechanism, an unsealing mechanism, a straightening mechanism, an anchoring mechanism, an anti-detachment mechanism, a sealing mechanism, a locking mechanism, a sand-prevention mechanism, and a throttle body. The release mechanism, throttle mechanism, unsealing mechanism, straightening mechanism, anchoring mechanism, anti-detachment mechanism, sealing mechanism, locking mechanism, and sand-prevention mechanism are sequentially connected to the throttle body. The anti-detachment mechanism includes a one-way sliding lock sleeve, which cooperates with the anchoring mechanism and the locking mechanism. The sand-prevention mechanism includes a gas nozzle connector, which is fixedly connected to the unsealing mechanism. The unsealing mechanism includes a retrieval head. The inner wall of the head is provided with a release shear pin, which is fixed to the throttle body. The anchoring mechanism includes a slip seat, a slip, and a slip gauge. The slip seat is fixedly installed on the one-way sliding lock sleeve, the slip is rotatably installed on the slip seat, and the slip gauge is located below the slip. The anchoring mechanism includes a locking sleeve and an open retaining ring. The open retaining ring is located at the top of the one-way sliding lock sleeve, and the locking sleeve is installed on the outside of the open retaining ring. The sealing mechanism includes a rubber sleeve base, which is installed on the outside of the locking sleeve. A lower double connector is installed between the rubber sleeve base and the locking sleeve. A lower connector is installed on the side wall of the lower double connector, and a pull cap is installed on the outer wall of the lower double connector and the lower connector.

[0007] Preferably, the release mechanism includes a release connector, which is installed on the air nozzle connector; the throttling mechanism includes a drain ring, which is disposed on the inner wall of the retrieval head; the straightening mechanism includes a straightener, on the outer wall of the straightener is a straightening plate, and a straightener cap is provided at the top of the straightener.

[0008] Preferably, a retaining ring is installed on the inner wall of the slip seat.

[0009] Preferably, a rubber tube is installed on the rubber tube base, and the rubber tube is made of a high-temperature and high-pressure resistant material.

[0010] Preferably, the surface of the card is nitrided.

[0011] Compared with existing technologies, the advantages of this utility model are as follows: This utility model, through the combined action of the anchoring mechanism and the human locking mechanism, combined with the double-layer sealing sand prevention design, ensures that the choke will not break off under the conditions of external force impact or vibration in the well, significantly reducing the risk of downhole falling objects. The choke body adopts a double-layer sealing sand prevention mechanism to prevent sand particles from entering the interior and causing jamming. At the same time, the sand prevention mechanism and the sealing mechanism are linked to enhance the sand resistance. The unsealing mechanism supports two methods: upward unsealing and downward hammering forcibly unsealing. The unsealing shear design enables flexible operation and adapts to the needs of complex well conditions. The rubber sleeve is made of high temperature and high pressure resistant material, combined with the slips with surface nitriding treatment (military technology), which has high hardness, high toughness and fracture resistance, ensuring long-term stable sealing and anchoring effect. Anchoring and sealing are completed simultaneously through potential energy conversion, and the setting time is short. The modular design of the gas nozzle is easy to replace and reduces maintenance costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention from a frontal view semi-sectional view.

[0014] The attached diagram lists the components represented by each number as follows:

[0015] 1-Disconnecting connector, 2-Air nozzle connector, 3-Water drain ring, 4-Retrieving head, 5-Throttle body, 6-Center upper cap, 7-Center, 8-Center plate, 9-Retaining ring, 10-Slip seat, 11-Slip, 12-Slip gauge, 13-One-way sliding lock sleeve, 14-Roller base, 15-Lock sleeve, 16-Open retaining ring, 17-Lower double connector, 18-Pull cap, 19-Lower connector. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see the appendix Figure 1This utility model provides a technical solution: a novel anti-detachment and anti-sand gas well throttle, comprising a release mechanism, a throttle mechanism, an unsealing mechanism, a straightening mechanism, an anchoring mechanism, an anti-detachment mechanism, a sealing mechanism, a locking mechanism, a sand-prevention mechanism, and a throttle body 5. The release mechanism, throttle mechanism, unsealing mechanism, straightening mechanism, anchoring mechanism, anti-detachment mechanism, sealing mechanism, locking mechanism, and sand-prevention mechanism are sequentially connected to the throttle body 5. The anti-detachment mechanism includes a one-way sliding lock sleeve 13, which is connected to the anchoring mechanism and the locking mechanism. The mechanism works in concert with the anchoring and locking mechanisms, combined with a double-layer sealing sand-proof design, to ensure that the choke does not break off under downhole impact or vibration conditions. This significantly reduces the risk of downhole debris, improves gas well safety, and reduces methanol dependence and wellhead equipment pressure risks. The sand-proof mechanism includes a gas nozzle connector 2, which is fixedly connected to the unsealing mechanism. The choke body 5 adopts a double-layer sealing sand-proof mechanism to prevent sand particles from entering and causing blockage. Simultaneously, the sand-proof mechanism and the sealing mechanism work together to enhance sand resistance and improve gas flow. The flow-carrying capacity reduces wellbore fluid accumulation and extends gas well life. The unsealing mechanism includes a retrieval head 4, with unsealing shear pins on its inner wall. These shear pins are fixed to the choke body 5. The unsealing mechanism supports both upward lifting and downward forceful unsealing methods. The unsealing shear pin design allows for flexible operation, adapting to complex well conditions, improving retrieval success rate, and reducing maintenance costs. The anchoring mechanism includes a slip seat 10, slips 11, and slip gauge 12. The slip seat 10 is fixedly installed on a one-way sliding lock sleeve 13, and the slips 11 are rotatably installed on... On the slip seat 10, the slip gauge 12 is set below the slip 11. The anchoring mechanism includes a locking sleeve 15 and an open retaining ring 16. The open retaining ring 16 is set on the top of the one-way sliding lock sleeve 13. The locking sleeve 15 is installed on the outside of the open retaining ring 16. The sealing mechanism includes a rubber sleeve base 14. The rubber sleeve base 14 is installed on the outside of the locking sleeve 15. A lower double connector 17 is installed between the rubber sleeve base 14 and the locking sleeve 15. A lower connector 19 is installed on the side wall of the lower double connector 17. A pull cap 18 is installed on the outer wall of the lower double connector 17 and the lower connector 19.

[0018] The release mechanism includes a release connector 1, which is installed on the air nozzle connector 2; the throttling mechanism includes a water drain ring 3, which is set on the inner wall of the retrieval head 4; the straightening mechanism includes a straightener 7, on the outer wall of the straightener 7, a straightening plate 8 is installed, and a straightener cap 6 is set at the top of the straightener 7; a retaining ring 9 is installed on the inner wall of the slip seat 10; and a rubber tube is installed on the rubber tube base 14. The rubber tube is made of high temperature and high pressure resistant material, which is suitable for high temperature, high pressure and sandy environment, and has high stability and long service life. The slip 11 is nitrided to reduce the frequency of retrieval operations.

[0019] A specific application of this embodiment is as follows: When needed, the throttle device is connected to the logging wireline on the instrument vehicle, installed inside the blowout preventer, and lowered into the gas well to the designed throttle depth at a speed not exceeding 60 m / min. The winch is then lifted at a speed not less than 30 m / min. The friction body of the straightening mechanism, the anchoring mechanism, and the lifting spindle system generate potential energy conversion relative motion, first anchoring the anchoring mechanism to the inner wall of the tubing, and then pulling up a static force of 250-350 kg to fully seal the rubber sleeve. The locking mechanism locks the anchoring mechanism and the sealing mechanism. When the descent encounters resistance at the top of the plunger, the winch is quickly lifted, and the upward-impacting shock absorber generates... The kinetic energy impact shears off the shear pin on the release joint (750-850Kg), completing the throttle deployment process. After the operation is completed, the throttle is unsealed. A special retrieval tool is used to retrieve the unsealing sleeve and lift it up by 150-200Kg. The unsealing shear pin is cut off, the rubber tube rebounds downwards, the sealing mechanism is unsealed, and the slip 11 loses support and moves downwards to unseale, completing the unsealing process. If lifting the unsealing sleeve is difficult, it can be forcibly unsealed by hammering it down. A special tool is used to retrieve the unsealing sleeve and hammer it down by 150-200Kg. The unsealing shear pin is cut off, the rubber tube rebounds downwards, the sealing mechanism is unsealed, and the slip 11 loses support and moves downwards to unseale, completing the unsealing process.

[0020] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A novel anti-breakage and anti-sand gas well throttle device, comprising a release mechanism, a throttle mechanism, an unsealing mechanism, a straightening mechanism, an anchoring mechanism, an anti-breakage mechanism, a sealing mechanism, a locking mechanism, an anti-sand mechanism, and a throttle body (5), characterized in that: The release mechanism, throttling mechanism, unsealing mechanism, straightening mechanism, anchoring mechanism, anti-detachment mechanism, sealing mechanism, locking mechanism, and sand-proof mechanism are sequentially connected to the throttling device body (5). The anti-detachment mechanism includes a one-way sliding lock sleeve (13), which cooperates with the anchoring mechanism and the locking mechanism. The sand-proof mechanism includes an air nozzle connector (2), which is fixedly connected to the unsealing mechanism. The unsealing mechanism includes a retrieval head (4), and the inner wall of the retrieval head (4) is provided with unsealing shears, which are fixed to the throttling device body (5). The anchoring mechanism includes a slip seat (10), a slip (11), and a slip gauge (12). The slip seat (10) is fixedly installed on the one-way sliding lock sleeve (13). On the ), the slip (11) is rotatably mounted on the slip seat (10), the slip gauge (12) is set below the slip (11), the anchoring mechanism includes a locking sleeve (15) and an open retaining ring (16), the open retaining ring (16) is set on the top of the one-way sliding lock sleeve (13), the locking sleeve (15) is installed on the outside of the open retaining ring (16), the sealing mechanism includes a rubber sleeve base (14), the rubber sleeve base (14) is installed on the outside of the locking sleeve (15), a lower double connector (17) is installed between the rubber sleeve base (14) and the locking sleeve (15), a lower connector (19) is installed on the side wall of the lower double connector (17), and a pull cap (18) is installed on the outer wall of the lower double connector (17) and the lower connector (19).

2. A new type of anti-breaking-off sand control gas well choke according to claim 1, characterized in that: The release mechanism includes a release connector (1), which is installed on the air nozzle connector (2). The throttling mechanism includes a drain ring (3), which is disposed on the inner wall of the retrieval head (4). The straightening mechanism includes a straightener (7), which has a straightening plate (8) installed on its outer wall. The straightener cap (6) is provided at the top of the straightener (7).

3. A new type of anti-breaking-off sand control gas well choke according to claim 1, characterized in that: A retaining ring (9) is installed on the inner wall of the locking seat (10).

4. The new type of anti-separation sand control gas well choke according to claim 1, characterized in that: A rubber tube is installed on the rubber tube base (14), and the rubber tube is made of high temperature and high pressure resistant material.

5. A new type of anti-breaking-off sand control gas well choke according to claim 1, characterized in that: The surface of the kava (11) is nitrided.

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