Auxiliary ascending device for wellhead of oil pipe plunger gas lift well

Abstract

The utility model relates to the technical field of oil and gas exploitation, in particular to an auxiliary ascending device of a wellhead of an oil pipe plunger gas lift well, a plunger comprises a fishing head, a shoulder part and a body part, the inner diameter of a well wall at the bottom end of a gas production tree is larger than that of a shaft, and the auxiliary ascending device comprises a sleeve. A plurality of closed grooves are formed in the outer side wall of the sleeve at intervals, a first cavity, a second cavity and a third cavity are formed in the inner side wall of the sleeve, the inner diameter of the first cavity is smaller than that of the second cavity, a shoulder is formed between the first cavity and the second cavity, and the third cavity is communicated with the first cavity. The inner diameter of the position, away from the second cavity, of the third cavity is larger than the inner diameter of the position, close to the second cavity, of the third cavity. The utility model solves the problems that the plunger cannot reach the position of the catcher at the wellhead, stays at the upper end of the gas production tree and swings to impact the gas production tree, and improves the advancing stability of the plunger.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas extraction technology, and in particular to an auxiliary upward device for the wellhead of a tubing plunger gas lift well. Background Technology

[0002] When natural gas flows from the formation into the bottom of a gas well, water in the natural gas continuously accumulates at the bottom, eventually leading to fluid buildup at the bottom of the wellbore. Currently, common methods for draining and producing gas in China include plungers, foam pumps, and electric submersible pumps.

[0003] When the plunger reaches the wellhead from the bottom of the well, the inconsistent pipe diameter between the gas tree and the wellbore causes the plunger to have a poor sealing effect. This means the plunger can only travel a certain distance in the gas tree and cannot reach the position of the capture device in the gas tree. In addition, the plunger will hit the inner wall of the gas tree, reducing the service life of the plunger. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention provides an auxiliary upward movement device for the wellhead of a tubing plunger gas lift well, which solves the problems that the plunger cannot reach the position of the catcher at the wellhead, and that it stops at the upper end of the gas tree and swings and hits the gas tree, thereby improving the stability of the plunger's movement.

[0005] This utility model provides an auxiliary upward movement device for the wellhead of a tubing plunger gas lift well. The plunger includes a retrieval head, a shoulder, and a body. The inner diameter of the well wall at the bottom of the gas production tree is larger than the inner diameter of the wellbore. The auxiliary upward movement device includes a sleeve. The outer side wall of the sleeve is provided with several closed grooves spaced apart. The inner side wall of the sleeve forms a first chamber, a second chamber, and a third chamber. The inner diameter of the first chamber is smaller than the inner diameter of the second chamber. A shoulder is formed between the first chamber and the second chamber. The inner diameter of the third chamber at the position away from the second chamber is larger than the inner diameter at the position closer to the second chamber.

[0006] A further improvement of the auxiliary upward movement device for the wellhead of a tubing plunger gas lift well according to this utility model is that the retrieval head includes a first head and a second head, the size of the first head is larger than the size of the second head, the body includes connecting heads at both ends and a rod between the two connecting heads, the shoulder connects the second head and a connecting head, the size of the connecting head is larger than the size of the second head, the side of the shoulder is inclined, and the inclination angle of the shoulder matches the inclination angle of the shoulder.

[0007] A further improvement of the auxiliary upward movement device for the wellhead of a tubing plunger gas lift well according to this utility model is that the corner position of the sleeve is chamfered.

[0008] A further improvement of this utility model to an auxiliary upward device for a tubing plunger gas lift wellhead is that the width of the sealing groove is 8cm and the depth is 4cm.

[0009] A further improvement of this utility model to the auxiliary upward movement device at the wellhead of an oil tubing plunger gas lift well is that the inner diameter of the first chamber is 35cm.

[0010] A further improvement of this utility model to an auxiliary upward device for a tubing plunger gas lift wellhead is that the inner diameter of the second chamber is 41cm.

[0011] A further improvement of this utility model to the auxiliary upward movement device at the wellhead of an oil tubing plunger gas lift well is that the angle between the side of the third chamber and the axial direction is 6°.

[0012] This invention relates to an auxiliary upward movement device for a tubing plunger gas lift wellhead. By placing this auxiliary upward movement device at the bottom of the wellbore wall at the gas production tree, the inner diameter of the wellbore wall at the bottom of the gas production tree matches the diameter of the wellbore. This prevents the plunger from swaying during its movement above the gas production tree, allowing the plunger to be secured at the shoulder position and drive the auxiliary upward movement device upward. This avoids pressure changes that could lead to low fluid production efficiency, thus improving fluid production efficiency. By setting the third chamber as an inclined surface, the plunger can smoothly enter the sleeve, improving the docking efficiency between the plunger and the sleeve. The shoulder design facilitates the contact between the plunger shoulder and the sleeve shoulder, making it easy to connect the plunger and the sleeve. This allows the plunger to drive the sleeve upward, enabling smooth fluid production operations.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an auxiliary upward movement device for the wellhead of an oil tubing plunger gas lift well, provided by this utility model.

[0016] Figure 2 This is a schematic diagram of a plunger.

[0017] Figure 3This is a schematic diagram of an auxiliary upward device for an oil tubing plunger gas lift wellhead, provided by this utility model, used in conjunction with the plunger.

[0018] Figure label:

[0019] 1. First chamber; 2. Second chamber; 3. Third chamber; 4. Shoulder; 5. Sealing groove; 6. Retrieval head; 7. Shoulder; 8. Body; 9. Sleeve; 10. Plunger; 11. Bottom wall of the gas production tree. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The following embodiments are used to illustrate this utility model but should not be used to limit its scope.

[0021] The following is combined with Figure 1 This invention describes an auxiliary upward movement device for a tubing plunger gas lift wellhead. The plunger 10 includes a retrieval head 6, a shoulder 7, and a body 8. The inner diameter of the well wall at the bottom of the gas production tree is larger than the inner diameter of the wellbore. The auxiliary upward movement device includes a sleeve 9. The outer side wall of the sleeve 9 is provided with several closed grooves 5 at intervals. The inner side wall of the sleeve 9 forms a first chamber 1, a second chamber 2, and a third chamber 3. The inner diameter of the first chamber 1 is smaller than the inner diameter of the second chamber 2. A shoulder 4 is formed between the first chamber 1 and the second chamber 2. The inner diameter of the third chamber 3 at the position away from the second chamber 2 is larger than the inner diameter at the position closer to the second chamber 2.

[0022] By placing the auxiliary upward device at the bottom well wall 11 of the gas production tree, the inner diameter of the bottom well wall 11 of the gas production tree matches the diameter of the wellbore, thus preventing the plunger 10 from swinging during its operation at the top of the gas production tree. This allows the plunger 10 to be locked in the position of the shoulder 4 and drive the auxiliary upward device to move upward, avoiding pressure changes that could lead to low liquid production efficiency and improving the liquid production efficiency.

[0023] In a preferred embodiment of this utility model, an auxiliary upward movement device for the wellhead of a tubing plunger gas lift well is provided, such as... Figure 2As shown, the retrieval head 6 includes a first head and a second head, with the first head being larger than the second head. The body 8 includes connectors at both ends and a rod between the two connectors. The shoulder 7 connects the second head and a connector, with the connector being larger than the second head. The side of the shoulder 7 is inclined, and the inclination angle of the platform shoulder 4 matches the inclination angle of the shoulder 7. This matching of the inclination angle of the platform shoulder 4 and the shoulder 7 allows the retrieval head 6 to be more stably engaged at the platform shoulder 4 of the sleeve 9 during upward movement, improving the connection stability and reliability of the plunger 10 and the sleeve 9.

[0024] Preferably, the corner of the sleeve 9 is chamfered. The presence of the chamfer makes the corner of the sleeve 9 smoother, reduces the resistance and friction inside the well wall of the sleeve 9, and facilitates the smooth movement of the sleeve 9 and the plunger 10.

[0025] In one specific implementation, the outer diameter of the sleeve 9 is 60cm; the width of the enclosed groove 5 is 8cm, the depth is 4cm, and there are 11 grooves; the inner diameter of the first chamber 1 is 35cm, and the axial depth of the first chamber 1 is 115cm; the inner diameter of the second chamber 2 is 41cm, and the axial depth of the second chamber 2 is 40cm; the angle between the side of the third chamber 3 and the axial direction is 6°, and the axial depth is 40cm.

[0026] In a specific implementation case, such as Figure 3 As shown, the auxiliary upward device is set at the bottom well wall 11 of the gas production tree during operation. When the plunger 10 moves upward, the liquid it carries flows out of the first chamber 1, the second chamber 2 and the third chamber 3 of the sleeve 9. When the plunger 10 moves upward from the wellbore to the bottom well wall 11 of the gas production tree, the plunger 10 engages with the sleeve 9. When the plunger 10 moves to the sleeve 9, the retrieval head 6 of the plunger 10 smoothly enters the first chamber 1 and the shoulder 7 abuts against the shoulder 4, ensuring that the plunger 10 can engage with the sleeve 9 and move upward smoothly to continuously carry out liquid production operation.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An auxiliary ascending device for the wellhead of a tubing plunger gas lift well, the plunger comprising a retrieval head, a shoulder, and a body, wherein the inner diameter of the well wall at the bottom of the gas production tree is larger than the inner diameter of the wellbore, characterized in that, The auxiliary upward device includes a sleeve, the outer side wall of which is provided with a plurality of closed grooves at intervals, and the inner side wall of the sleeve forms a first chamber, a second chamber and a third chamber. The inner diameter of the first chamber is smaller than the inner diameter of the second chamber. A shoulder is formed between the first chamber and the second chamber. The inner diameter of the third chamber at the position away from the second chamber is larger than the inner diameter at the position closer to the second chamber.

2. The auxiliary upward movement device at the wellhead of a tubing plunger gas lift well according to claim 1, characterized in that, The salvage head includes a first head and a second head, the first head being larger than the second head. The body includes connectors at both ends and a rod between the two connectors. The shoulder connects the second head and a connector, the connector being larger than the second head. The side of the shoulder is inclined, and the inclination angle of the shoulder matches the inclination angle of the shoulder.

3. The auxiliary upward movement device at the wellhead of a tubing plunger gas lift well according to claim 1, characterized in that, The sleeve has a chamfered corner.

4. The auxiliary upward movement device at the wellhead of a tubing plunger gas lift well according to claim 1, characterized in that, The width of the enclosed groove is 8cm and the depth is 4cm.

5. The auxiliary upward movement device at the wellhead of a tubing plunger gas lift well according to claim 1, characterized in that, The inner diameter of the first chamber is 35 cm.

6. The auxiliary upward movement device at the wellhead of a tubing plunger gas lift well according to claim 1, characterized in that, The inner diameter of the second chamber is 41 cm.

7. The auxiliary upward movement device at the wellhead of a tubing plunger gas lift well according to claim 1, characterized in that, The angle between the side of the third chamber and the axial direction is 6°.

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