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Maintenance method of tubing plugging bridge plug and gas tree main valve

An oil pipe and bridge plug technology is applied in the maintenance field of the main valve of the Christmas tree, which can solve the problem that the main valve of the Christmas tree cannot be repaired without damage, and achieve the effect of stable maintenance, ingenious conception and reasonable structure.

Active Publication Date: 2022-03-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for oil pipe plugging bridge plug and gas tree main valve maintenance, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing oil and gas well gas tree main valve cannot be repaired without damage

Method used

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  • Maintenance method of tubing plugging bridge plug and gas tree main valve
  • Maintenance method of tubing plugging bridge plug and gas tree main valve
  • Maintenance method of tubing plugging bridge plug and gas tree main valve

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Embodiment Construction

[0027] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0028] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of front, back, up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.

[0029] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0030] as attached figure 1 , 2, 3, 4, and 5, the oil pipe plug includes an upper mandrel 1, an upper joint 2, a middle mandrel 3, an upper sliding sleeve 4, a lower sleeve 5, a block joint 6, a lower mandrel 7, a ball Seat 40, main push cylinder 9, salvage joint 10, blocking joint 11, p...

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Abstract

The invention relates to the technical field of gas tree main valve maintenance, and relates to a method for oil pipe plugging bridge plug and gas tree main valve maintenance. The former includes an upper mandrel, an upper joint, a center mandrel, an upper sliding sleeve, a lower sleeve, Block joint, lower mandrel, ball seat, main pusher, salvage joint, blocking joint, pressure cylinder, bushing and lower end cap, and an upper joint is fixedly installed on the outer side of the upper end of the upper mandrel; the latter steps are as follows: (1) at the wellhead A blowout preventer is installed on the upper part, and the coiled tubing is connected with the tubing plugging bridge, and lowered into the well. The invention has a reasonable and compact structure and an ingenious concept. By cutting the first shear nail, the rubber tube assembly expands and the slip assembly radially expands outwards to complete the setting; by cutting the second shear nail, the one-way anti-retraction assembly becomes invalid. ;By cutting off the third shear nail, the rubber tube assembly and the slip assembly are reset, and the unsealing is completed, which has the characteristics of high efficiency, stability and good maintenance effect.

Description

technical field [0001] The invention relates to the technical field of maintenance of a main valve of a gas-mass tree, and relates to a maintenance method for plugging a bridge plug of an oil pipe and a main valve of a gas-mass tree. Background technique [0002] The main valve of the Xmas tree of an oil and gas well is the first valve directly above the wellhead cross. When the main valve has a problem, the maintenance method usually used is the wellhead freezing and temporary plugging process, that is, the oil pipe is blocked by dry ice, slag, etc., so that Repair the main valve. Yet this method can not be removed in the well after the maintenance of this method finishes, and the materials such as used ban soil will fall to the bottom of the well, which is unfavorable for the normal production of the gas well. Contents of the invention [0003] The present invention provides a method for oil pipe plugging bridge plug and gas tree main valve maintenance, which overcomes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134E21B33/127E21B33/129
CPCE21B33/134E21B33/127E21B33/129
Inventor 李勇龙张贵仪王肃凯柯学韩长武王天祥王志勇刘伟刘雄辉张立朋
Owner BC P INC CHINA NAT PETROLEUM CORP