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CN-121993122-A - Throttle rupture disc, workover-free throttle device and control method

CN121993122ACN 121993122 ACN121993122 ACN 121993122ACN-121993122-A

Abstract

The invention discloses a throttle rupture disc, a workover-free throttle device and a control method, which belong to the technical field of oil and gas production of oil and gas fields, wherein the throttle rupture disc comprises a disc body which is fixed in a throttle cylinder, an air tap is arranged on the disc body, and the disc body is made of a breakable material and can be broken; the well repair-free throttling device comprises a throttling cylinder, the throttling cylinder comprises an upper throttling cylinder and a lower throttling cylinder which are coaxially connected, a disc body and a sand prevention cover are arranged between the upper throttling cylinder and the lower throttling cylinder, the disc body is fixed between the upper throttling cylinder and the lower throttling cylinder in a sealing mode, an air tap coaxial with the throttling cylinder is arranged on the disc body, the sand prevention cover is fixed on the bottom end face of the disc body and covers the air tap, an eyelet through which high-pressure natural gas passes is arranged on the sand prevention cover, the air tap is communicated with the eyelet of the sand prevention cover, the high-pressure natural gas sequentially passes through the eyelet and the air tap to flow to an air wellhead, the technical problem that in the prior art, a tubular column has to be repaired due to the fact that the fishing of the throttling device fails is effectively solved, and the gas production operation efficiency is high and the salvage risk is controllable.

Inventors

  • WANG SIFAN
  • ZHANG YUE
  • HU DONGFENG
  • WANG YU
  • YE WENYONG
  • LI QIANCHUN
  • CHEN PENGWEI
  • YANG YANZENG
  • TAN HUAN
  • FANG XIAOJUN

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团川庆钻探工程有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (14)

  1. 1. A throttling rupture disc is characterized by comprising a disc body (2) which is fixed in a throttling cylinder (1), wherein an air tap (4) is arranged on the disc body (2), and the disc body (2) is made of a breakable material and can be broken.
  2. 2. A throttle rupture disc according to claim 1, wherein the material of said disc body (2) is either ceramic or glass.
  3. 3. A well repair-free throttling device comprises a throttling cylinder (1) and is characterized in that the throttling cylinder (1) comprises an upper throttling cylinder (101) and a lower throttling cylinder (102) which are coaxially connected, a disc body (2) is arranged between the upper throttling cylinder (101) and the lower throttling cylinder (102), the disc body (2) is fixed between the upper throttling cylinder (101) and the lower throttling cylinder (102) in a sealing mode, an air tap (4) coaxial with the throttling cylinder (1) is arranged on the disc body (2), an anti-sand cover (5) is fixed on the bottom end face of the disc body (2), the anti-sand cover (5) covers the air tap (4), holes through which high-pressure natural gas passes are formed in the anti-sand cover (5), the air tap (4) is communicated with the holes of the anti-sand cover (5), and the high-pressure natural gas sequentially flows to an air wellhead through the holes and the air tap (4).
  4. 4. A workover-free throttling device is characterized in that the number of the trays (2) is one or more, when the number of the trays (2) is one, the lower throttling cylinder (102) is directly fixed at the lower end of the upper throttling cylinder (101), the trays (2) are sealed and fixed between the upper throttling cylinder (101) and the lower throttling cylinder (102), when the number of the trays (2) is multiple, the lower throttling cylinder (102) is indirectly fixed at the lower end of the upper throttling cylinder (101) through a plurality of connecting cylinders (7) which are coaxially connected from top to bottom, and each tray (2) is respectively positioned between the upper throttling cylinder (101) and the uppermost connecting cylinder (7), between the adjacent connecting cylinders (7) and between the lowest connecting cylinder (7) and the lower throttling cylinder (102).
  5. 5. The workover-free throttling device according to claim 4, wherein the inner walls of the upper throttling cylinder (101) and the connecting cylinder (7) are respectively provided with a boss (6), and the disc body (2) is fixed below the corresponding boss (6).
  6. 6. The workover-free throttling device according to claim 5, wherein when the number of the disc bodies (2) is one, the upper end of the lower throttling cylinder (102) stretches into the upper throttling cylinder (101) to be connected with the upper throttling cylinder (101) in a threaded mode, the disc bodies (2) are fixed between a boss (6) of the upper throttling cylinder (101) and the lower throttling cylinder (102), a sealing ring (3) is arranged between the disc bodies (2) and the upper throttling cylinder (101), and the sealing ring (3) is arranged between the upper throttling cylinder (101) and the lower throttling cylinder (102).
  7. 7. The well-repair-free throttling device according to claim 5, wherein when the number of the disc bodies (2) is multiple, the upper throttling cylinders (101), the connecting cylinders (7) and the lower throttling cylinders (102) are sequentially connected in a threaded mode from top to bottom, the uppermost disc body (2) is fixed between a boss (6) of the upper throttling cylinder (101) and the uppermost connecting cylinder (7), the lowermost disc body (2) is fixed between a boss (6) of the lowermost connecting cylinder (7) and the lower throttling cylinder (102), the middle disc body (2) is fixed between the bottom end face of the boss (6) of the corresponding connecting cylinder (7) and the connecting cylinder (7) below, sealing rings (3) are arranged between the disc bodies (2) and the upper throttling cylinders (101) and between the connecting cylinders (7), between the upper throttling cylinders (101) and the uppermost connecting cylinders (7) and between the lower throttling cylinders (102) and the lowermost connecting cylinders (7).
  8. 8. A workover treatment-free throttling device as set forth in claim 4, wherein when the number of the trays (2) is plural, the sand control cover (5) is fixed below the lowermost tray (2).
  9. 9. The workover treatment-free throttling device according to claim 4, wherein when the number of the disc bodies (2) is multiple, the aperture of the air tap (4) on each disc body (2) is sequentially increased from top to bottom.
  10. 10. The workover treatment-free throttling device according to claim 4, wherein the disc body (2) is of a hollow hemispherical structure, the concave surface of the hollow hemispherical structure faces upwards and the convex surface of the hollow hemispherical structure faces downwards, and the air nozzle (4) is arranged in the center of the bottom end surface of the hollow hemispherical structure.
  11. 11. The workover treatment-free throttling device according to claim 4, wherein the disc body (2) is of a planar structure, and the air tap (4) is arranged in the center of the planar structure.
  12. 12. A well repair-free throttling device comprises a throttling cylinder (1), a salvaging and deblocking mechanism (8), an anchoring slip mechanism (9) and a rubber cylinder sealing mechanism (10) are sequentially sleeved on the outer wall of the throttling cylinder (1) from top to bottom, the anchoring slip mechanism (9) is respectively in locking connection with the throttling cylinder (1) through a locking unit, the salvaging and deblocking mechanism (8) is in threaded connection with the anchoring slip mechanism (9), the anchoring slip mechanism (9) comprises a slip lower seat, the slip lower seat is arranged at the top end of the rubber cylinder sealing mechanism (10), and the well repair-free throttling device is characterized in that one or more disc bodies (2) are sealed and fixed in the throttling cylinder (1), air nozzles (4) coaxial with the throttling cylinder (1) are arranged on the disc bodies (2), when the disc bodies (2) are in one, sand prevention covers (5) are fixed on the bottom end faces of the disc bodies (2), the sand prevention covers (5), the sand prevention covers the air nozzles (4), and high-pressure natural gas flows to the natural gas wellhead through the high-pressure air nozzles (4) in sequence.
  13. 13. A workover treatment restriction device according to any one of claims 3-12, wherein the sand control cover (5) is made of a breakable material.
  14. 14. The control method of the workover-free throttling device is characterized by comprising the following steps of: s1, in the well descending stage, a well repair-free throttling device is lowered into a well through a production pipe column to open a well for gas production; S2, after the well descending stage is completed, controlling natural gas passing through holes of the sand prevention cover (5) to flow to a gas wellhead after being throttled and depressurized by gas nozzles (4) on the tray body (2) in sequence; And S3, when the gas well is produced, if the gas well productivity in the throttling production stage is lower than a set value, entering the production capacity adjustment and full-diameter conversion stage, namely when the tray body (2) of the workover-free throttling device is one, crushing the tray body (2) by putting a tool string into a production pipe column, changing a throttling production channel into a full-diameter production channel, realizing the fishing-free operation of the workover-free throttling device, when the tray bodies (2) of the workover-free throttling device are multiple, crushing the tray bodies (2) by putting a tool string part into the production pipe column to gradually increase the diameter of the throttling production channel, continuing to throttle by the lower residual tray bodies (2), and when the production capacity adjustment is not needed, continuing to crush the lower residual tray bodies (2), until all the tray bodies (2) are crushed, changing the throttling production channel into the full-diameter production channel, and realizing the full-life cycle gas production of the gas well.

Description

Throttle rupture disc, workover-free throttle device and control method Technical Field The invention belongs to the technical field of oil and gas field oil and gas production, and particularly relates to a throttling rupture disc, a well repair-free throttling device and a control method. Background The underground throttling gas production technology is one of core technologies for low-cost development of gas fields, can effectively prevent hydrate from being produced, avoids ground heating and high-pressure gathering and transportation of a gas production pipeline network, and the throttler is used as a key tool for underground throttling, depressurization and gas production, is various in types and plays an important role respectively, and comprises a slip draggable type, a preset draggable type, a fixed short section type, an electric setting draggable type, an electric air tap remotely adjustable type and the like. As the gas well enters the later production stage or the choke breaks down, the salvage operation becomes a necessary link to avoid affecting the normal gas production. At present, the fishing success rate of steel wire operation is only maintained at 60-70%, and the conservation estimation is carried out, so that the processing period is long due to complex and failed fishing of the throttler in China each year, the yield loss of hundreds of hundred million parties of natural gas is caused, the flooding of a gas well is easier, the service life of the gas well is shortened, and under the condition that the fishing of the throttler fails or cannot be carried out, the costly tubular column lifting well repairing treatment measures are forced to be adopted. However, the existing throttle mechanism of the throttle mainly adopts soluble and insoluble materials, the soluble materials are easy to cause soluble and uncontrollable problems, such as dissolution in advance or dissolution and insolubility, and the throttle mechanism adopting insoluble materials directly causes that the gas well productivity can not meet the requirement of gas well liquid carrying production if the throttle mechanism fails to salvage, the gas nozzle of the throttle mechanism is easy to be blocked or the gas well is flooded, and the gas well production is seriously affected. For example, chinese patent publication No. CN210068107U discloses a soluble restrictor, which includes a dispenser, a body, a pin, a fishing neck, a central rod, slips, a cone seat, a button, a baffle, a cone seat cover, a rubber sleeve, a movable sleeve, a stopper, an outer sleeve, an air tap, a pressing block, a sand control cover, and other components, wherein the pin is made of brass material, the slip is made of ductile iron material, the rubber sleeve is made of nitrile rubber material, the air tap is made of cemented carbide material, and the other components are made of (e.g., mg-Al-Zn) soluble alloy material. Therefore, it is needed to design a throttling device capable of avoiding the lifting of a pipe column for well repair during treatment so as to meet the gas production requirement of the whole life cycle of a gas well, further remarkably improve the gas production operation efficiency and effectively reduce the economic loss caused by the salvage failure and the shortening of the life of the gas well. Disclosure of Invention The invention aims to solve the problems in the prior art, and provides a throttle rupture disc, a well repair-free throttle device and a control method, through the design of disk body and disk body upper air cock, effectively solved because of the throttle salvage failure and had to carry out the technical problem of lifting string workover, realized gas well full life cycle gas production. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The invention provides a throttle rupture disc which comprises a disc body fixed in a throttle cylinder, wherein an air tap is arranged on the disc body, and the disc body is made of a breakable material and can be broken. Further, the material of the tray body is any one of ceramic or glass. The invention also provides a workover-free throttling device, which comprises a throttling cylinder, wherein the throttling cylinder comprises an upper throttling cylinder and a lower throttling cylinder which are coaxially connected, a disc body is arranged between the upper throttling cylinder and the lower throttling cylinder, the disc body is fixed between the upper throttling cylinder and the lower throttling cylinder in a sealing way, an air nozzle coaxial with the throttling cylinder is arranged on the disc body, a sand prevention cover is fixed on the bottom end surface of the disc body, the air nozzle is covered by the sand prevention cover, an eyelet through which high-pressure natural gas passes is arranged on the sand prevention cover, the air nozzle is communicated with the eyelet of the sand prevention cover, and the high-