Plunger seating device free of steel wire putting for gas well

Abstract

The plunger seating device comprises a center connecting rod, one end of the center connecting rod is fixedly connected with a fishing neck, the end, away from the center connecting rod, of the fishing neck is fixedly connected with a fishing head, the other end of the center connecting rod is fixedly connected with a clamping connector, and the position, close to the clamping connector, of the center connecting rod is movably sleeved with a guide cylinder; the outer wall of the center connecting rod is sleeved with a buffer spring, the buffer spring is arranged between the guide cylinder and the fishing neck, the end, away from the center connecting rod, of the guide cylinder is connected with a seating cylinder, and a boss is arranged in the middle of the seating cylinder in the radial direction. Without steel wire operation setting, the tool operates only according to the gravity of the tool and the unique structure in the tool, supporting setting of the tool in the preset working barrel of the oil pipe is achieved, the cost is saved, the duration of plunger downhole operation is greatly shortened, and the gas well production time rate is prolonged.

Description

Technical Field

[0001] This invention belongs to the technical field of natural gas well production equipment, specifically relating to a plunger placement device for gas wells that eliminates the need for steel wire deployment. Background Technology

[0002] Many natural gas wells suffer from severe fluid accumulation in the wellbore and near-wellbore area. This accumulation negatively impacts well production, especially in tight gas reservoirs, where severe fluid buildup can lead to decreased production or even shutdown. Efficient and economical fluid removal technologies are essential to ensure long-term stable production. Plunger lift is a commonly used fluid removal and production stabilization technology in gas fields. Plunger lift uses a downhole plunger as an isolator at the gas-liquid interface, utilizing the well's own energy to intermittently lift the liquid above the plunger in the tubing to the surface, thus achieving fluid removal from the gas well. By lifting the liquid with the plunger, a stable interface is formed between the gas and liquid, effectively preventing liquid loss and improving lift efficiency. The plunger lift technology fully utilizes the gas well's own energy and can cover the entire development lifecycle of the gas well.

[0003] Currently, conventional plunger locking and setting methods are mainly divided into coupling type and slip type, both of which require wire rope operation to achieve the setting and locking of the setter. Both of these require wire rope operation, which involves many steps and takes a long time, affecting the efficiency of the plunger mechanism and increasing the labor intensity of on-site operators. Summary of the Invention

[0004] The purpose of this invention is to provide a plunger setter for gas wells that does not require wire rope deployment, thus solving the technical problem that the existing technology uses wire rope operations to achieve the setting and sealing of the setter with multiple time-consuming steps.

[0005] The technical solution adopted in this invention is a plunger placement device for gas wells that does not require wireline deployment, comprising a central connecting rod, a retrieval neck fixedly connected to one end of the central connecting rod, a retrieval head fixedly connected to the end of the retrieval neck away from the central connecting rod, a locking connector fixedly connected to the other end of the central connecting rod, a guide tube movably sleeved on the central connecting rod near the locking connector, the locking connector being located inside the guide tube, a buffer spring sleeved on the outer wall of the central connecting rod, the buffer spring being located between the guide tube and the retrieval neck, a placement cylinder connected to the end of the guide tube away from the central connecting rod, and a boss radially provided in the middle of the placement cylinder.

[0006] The invention is further characterized by:

[0007] The salvage neck is fixed to the central connecting rod by the first locking pin.

[0008] A threaded sleeve is provided between the outer wall of the central connecting rod and the inner wall of the guide tube.

[0009] The locking connector is conical.

[0010] The side wall of the guide tube is provided with several second guide holes, and the side wall of the settling tube near the guide tube is provided with several first guide holes.

[0011] The guide tube and the landing tube are fixedly connected by the second locking pin.

[0012] Several O-grooves are radially formed at the end of the settling cylinder away from the guide cylinder, and sealing rings are installed in the O-grooves.

[0013] The boss has an upward lifting chamfer at one end near the guide tube and a settling cylinder support chamfer at the other end. The angles of the upward lifting chamfer and the settling cylinder support chamfer are both °.

[0014] The beneficial effects of this invention are:

[0015] The present invention provides a reliable and convenient plunger setter for gas wells that eliminates the need for wireline deployment. It eliminates the need for wireline deployment and setting, relying solely on the tool's own weight and unique internal structure to achieve tool support and setting within the pre-installed working cylinder in the tubing, saving costs and significantly shortening the time required for plunger downhole operations, thereby extending the gas well production rate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the wire-free plunger placement device for gas wells according to the present invention;

[0017] Figure 2 This is a schematic diagram of the setting and sealing of the wire-free plunger placement device for gas wells according to the present invention;

[0018] Figure 3 This is a schematic diagram of the working process of the plunger placement device for gas wells that does not require steel wire deployment according to the present invention.

[0019] In the diagram, 1. retrieval head, 2. retrieval neck, 3. first locking pin, 4. buffer spring, 5. central connecting rod, 6. threaded sleeve, 7. locking joint, 8. second locking pin, 9. first guide hole, 10. upward lifting chamfer, 11. landing cylinder support chamfer, 12. O-ring, 13. sealing ring, 14. guide cylinder, 15. landing cylinder, 16. second guide hole, 17. boss. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] This invention relates to a wire-free plunger placement device for gas wells, such as... Figure 1As shown, the device includes a central connecting rod 5. One end of the central connecting rod 5 is fixedly connected to a retrieval neck 2 via a first locking pin 3. The end of the retrieval neck 2 away from the central connecting rod 5 is fixedly connected to a retrieval head 1. The other end of the central connecting rod 5 is fixedly connected to a locking connector 7, which is conical in shape. A guide tube 14 is movably sleeved on the central connecting rod 5 near the locking connector 7. The locking connector 7 is located inside the guide tube 14. A threaded sleeve 6 is provided between the outer wall of the central connecting rod 5 and the inner wall of the guide tube 14. The locking connector 7 is limited inside the guide tube 14 by the threaded sleeve 6. A buffer spring 4 is sleeved on the outer wall of the central connecting rod 5. The buffer spring 4 is located between the guide tube 14 and the retrieval neck 2. The end of the flow tube 14 away from the central connecting rod 5 is fixed to the landing tube 15 by the second locking pin 8. The side wall of the flow tube 14 is provided with several second flow guide holes 16. The side wall of the landing tube 15 near the flow tube 14 is provided with several first flow guide holes 9, which are at 90° to each other. The middle part of the landing tube 15 is provided with a boss 17 in the radial direction. The end of the boss 17 near the flow tube 14 is provided with an upward lifting chamfer 10. The other end of the boss 17 is provided with a landing tube support chamfer 11. The angles of the upward lifting chamfer 10 and the landing tube support chamfer 11 are both 45°. The end of the landing tube 15 away from the flow tube 14 is provided with several O-grooves 12 in the radial direction. A sealing ring 13 is provided in the O-grooves 12.

[0022] The retrieval head 1 is used to retrieve the entire tool; the central connecting rod 5 passes through the center of the buffer spring 4 to buffer the impact force of the plunger falling, and can be compressed or extended along the direction of the central connecting rod; one end of the central connecting rod 5 is connected to the retrieval neck 2, and the other end is provided with a locking joint 7, which is limited inside the guide tube 14 by the threaded sleeve 6, and is used to limit the vertical movement of the central connecting rod 5. The central connecting rod 5 can move in the vertical direction, but the movement distance is limited; both the guide tube 14 and the landing tube 15 are hollow structures. The landing tube 15 has several first guide holes 9 on the side wall near the guide tube 14. The first guide holes 9 are used to discharge the airflow inside the landing tube 15, so that the pressure at the upper and lower ends of the entire device can be quickly balanced, thereby allowing it to fall quickly; the outer diameter of the boss 17 is larger than that of the landing tube 14. The outer diameter of the 5-inch tube is 2mm larger. The boss 17 and the outer diameter of the base tube 15 form a variable diameter step, which is used to lock and support the upper end of the pre-positioned working tube of the tubing. The sealing ring 13 is nested in the O-ring groove 12 to support the base and form a seal after it is inserted into the pre-positioned working tube of the tubing. The boss 17 has an upward lifting chamfer 10 at one end near the guide tube 14 and a base tube support chamfer 11 at the other end. The upward lifting chamfer 10 is used to create a gap during the wire lifting process, so that the entire tool can be lifted out. The base tube support chamfer 11 is used to guide the direction of the pre-positioned working tube and to provide support at the variable diameter point inside the pre-positioned working tube of the tubing. The sealing ring 13 is nested in the O-ring groove 12. The outer diameter of the sealing ring 13 is slightly larger than the inner diameter of the upper end of the pre-positioned working tube of the tubing. After being embedded, it increases the friction and thus plays a role in sealing and fixing.

[0023] In use, first, use a wireline to unclog the well. The diameter of the unclog gauge should be 1mm larger than the maximum outer diameter of this invention to ensure smooth installation. Lower the unclog gauge to the retrieval head of the pre-installed tubing working cylinder with the choke core. After well cleaning, if the process is successful, continue using the wireline to retrieve the choke core from the pre-installed working cylinder. After the choke core is retrieved, the hollow tubing pre-installed working cylinder remains. At this point, deploy this invention while the gas well is shut in. Figure 2 As shown, until the present invention enters the tubing pre-set working cylinder support seat sealing and locking, as... Figure 3 As shown, the plunger tool is then deployed to prepare for well opening, drainage, and gas production. To facilitate tool retrieval, a standard retrieval head 1 is provided at the top. During the retrieval process, only conventional steel wire retrieval tools are needed to retrieve the invention.

[0024] The present invention provides a wireless plunger placement device for gas wells. It has a simple structure and is easy to use. The placement process does not require wire work. It can achieve a supported setting by relying on the structural features of the tool itself, the tool's own weight and the impact force of the plunger. It is not easy for the tool to be blown out of the tubing pre-placed working cylinder by the gas flow. It can also save costs, shorten the well occupation time of the measures, and achieve the goal of high-efficiency gas well production.

[0025] Example 1

[0026] A plunger dropper for gas wells that requires no wire can be deployed includes a central connecting rod 5. One end of the central connecting rod 5 is fixedly connected to a retrieval neck 2. The end of the retrieval neck 2 away from the central connecting rod 5 is fixedly connected to a retrieval head 1. The other end of the central connecting rod 5 is fixedly connected to a locking connector 7. A guide tube 14 is movably sleeved on the central connecting rod 5 near the locking connector 7. The locking connector 7 is located inside the guide tube 14. A buffer spring 4 is sleeved on the outer wall of the central connecting rod 5. The buffer spring 4 is located between the guide tube 14 and the retrieval neck 2. A dropper 15 is connected to the end of the guide tube 14 away from the central connecting rod 5. A boss 17 is provided radially in the middle of the dropper 15. The retrieval neck 2 and the central connecting rod 5 are fixedly connected by a first locking pin 3. A threaded sleeve 6 is provided between the outer wall of the central connecting rod 5 and the inner wall of the guide tube 14. The locking connector 7 is conical.

[0027] Example 2

[0028] A wire-free plunger placement device for gas wells includes a central connecting rod 5. One end of the central connecting rod 5 is fixedly connected to a retrieval neck 2. The end of the retrieval neck 2 away from the central connecting rod 5 is fixedly connected to a retrieval head 1. The other end of the central connecting rod 5 is fixedly connected to a locking connector 7. A flow guide tube 14 is movably sleeved on the central connecting rod 5 near the locking connector 7. The locking connector 7 is located inside the flow guide tube 14. A buffer spring 4 is sleeved on the outer wall of the central connecting rod 5, located between the flow guide tube 14 and the retrieval neck 2, guiding the flow... The end of the cylinder 14 away from the central connecting rod 5 is connected to the landing cylinder 15. The landing cylinder 15 has a boss 17 in the radial direction in the middle. The retrieval neck 2 is fixed to the central connecting rod 5 by the first locking pin 3. A threaded sleeve 6 is provided between the outer wall of the central connecting rod 5 and the inner wall of the guide cylinder 14. The locking joint 7 is conical. Several second guide holes 16 are opened on the side wall of the guide cylinder 14. Several first guide holes 9 are opened on the side wall of the landing cylinder 15 near the guide cylinder 14. The guide cylinder 14 and the landing cylinder 15 are fixed to each other by the second locking pin 8.

[0029] Example 3

[0030] A plunger placement device for gas wells without wireline deployment includes a central connecting rod 5. One end of the central connecting rod 5 is fixedly connected to a retrieval neck 2. The end of the retrieval neck 2 furthest from the central connecting rod 5 is fixedly connected to a retrieval head 1. The other end of the central connecting rod 5 is fixedly connected to a locking connector 7. A guide tube 14 is movably sleeved on the central connecting rod 5 near the locking connector 7. The locking connector 7 is located inside the guide tube 14. A buffer spring 4 is sleeved on the outer wall of the central connecting rod 5, located between the guide tube 14 and the retrieval neck 2. A placement cylinder 15 is connected to the end of the guide tube 14 furthest from the central connecting rod 5. The landing cylinder 15 has a radially arranged boss 17 in the middle. The retrieval neck 2 is fixedly connected to the central connecting rod 5 by the first locking pin 3. A threaded sleeve 6 is provided between the outer wall of the central connecting rod 5 and the inner wall of the guide cylinder 14. The locking joint 7 is conical. Several second guide holes 16 are opened on the side wall of the guide cylinder 14. Several first guide holes 9 are opened on the side wall of the landing cylinder 15 near the guide cylinder 14. The guide cylinder 14 and the landing cylinder 15 are fixedly connected by the second locking pin 8. Several O-shaped grooves 12 are opened radially at the end of the landing cylinder 15 away from the guide cylinder 14. A sealing ring 13 is provided in the O-shaped groove 12.

[0031] Example 4

[0032] A plunger dropper for gas wells that requires no wireline deployment includes a central connecting rod 5. One end of the central connecting rod 5 is fixedly connected to a retrieval neck 2. The end of the retrieval neck 2 furthest from the central connecting rod 5 is fixedly connected to a retrieval head 1. The other end of the central connecting rod 5 is fixedly connected to a locking connector 7. A guide tube 14 is movably fitted onto the central connecting rod 5 near the locking connector 7. The locking connector 7 is located inside the guide tube 14. A buffer spring 4 is fitted onto the outer wall of the central connecting rod 5, located between the guide tube 14 and the retrieval neck 2. A dropper 15 is connected to the end of the guide tube 14 furthest from the central connecting rod 5. A boss 17 is radially provided in the middle of the dropper 15. The retrieval neck 2 and the central connecting rod 5 are connected by a first lock. Pin 3 is fixedly connected. A threaded sleeve 6 is provided between the outer wall of the central connecting rod 5 and the inner wall of the guide tube 14. The locking joint 7 is conical. Several second guide holes 16 are opened on the side wall of the guide tube 14. Several first guide holes 9 are opened on the side wall of the landing tube 15 near the guide tube 14. The guide tube 14 and the landing tube 15 are fixedly connected by a second locking pin 8. Several O-grooves 12 are opened radially at the end of the landing tube 15 away from the guide tube 14. A sealing ring 13 is provided in the O-grooves 12. The boss 17 is provided with an upward lifting chamfer 10 at the end near the guide tube 14. The other end of the boss 17 is provided with a landing tube support chamfer 11. The angles of the upward lifting chamfer 10 and the landing tube support chamfer 11 are both 45°.

Claims

1. A plunger placement device for gas wells that eliminates the need for wire rod deployment, characterized in that, The device includes a central connecting rod (5), one end of which is fixedly connected to a retrieval neck (2), and the other end of the retrieval neck (2) away from the central connecting rod (5) is fixedly connected to a retrieval head (1). The other end of the central connecting rod (5) is fixedly connected to a locking connector (7). A flow guide cylinder (14) is movably sleeved on the central connecting rod (5) near the locking connector (7). The locking connector (7) is located inside the flow guide cylinder (14). A buffer spring (4) is sleeved on the outer wall of the central connecting rod (5). The buffer spring (4) is located between the flow guide cylinder (14) and the retrieval neck (2). The end of the flow guide cylinder (14) away from the central connecting rod (5) is connected to a landing cylinder (15). A boss (17) is provided radially in the middle of the landing cylinder (15).

2. The plunger placement device for gas wells without wire feeding as described in claim 1, characterized in that, The salvage neck (2) is fixedly connected to the central connecting rod (5) by the first locking pin (3).

3. The plunger placement device for gas wells without wire rod deployment according to claim 1, characterized in that, A threaded sleeve (6) is provided between the outer wall of the central connecting rod (5) and the inner wall of the guide tube (14).

4. The plunger placement device for gas wells without wire rod deployment according to claim 1, characterized in that, The locking connector (7) is conical.

5. The plunger placement device for gas wells without wire rod deployment according to claim 1, characterized in that, The guide tube (14) has several second guide holes (16) on its side wall, and the settling tube (15) has several first guide holes (9) on its side wall near the guide tube (14).

6. The plunger placement device for gas wells without wire rod deployment according to claim 1, characterized in that, The guide tube (14) and the landing tube (15) are fixedly connected by the second locking pin (8).

7. The plunger placement device for gas wells without wire rod deployment according to claim 1, characterized in that, The end of the settling cylinder (15) away from the guide cylinder (14) is provided with a plurality of O-shaped grooves (12) in the radial direction, and a sealing ring (13) is provided in the O-shaped groove (12).

8. The plunger placement device for gas wells without wire rod deployment according to claim 1, characterized in that, The boss (17) has an upward lifting chamfer (10) at one end near the guide tube (14), and a settling tube support chamfer (11) at the other end of the boss (17). The angles of the upward lifting chamfer (10) and the settling tube support chamfer (11) are both 45°.

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