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Oil pipe plugging bridge plug and Christmas tree main valve maintenance method

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

Active Publication Date: 2021-02-12
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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  • Oil pipe plugging bridge plug and Christmas tree main valve maintenance method
  • Oil pipe plugging bridge plug and Christmas tree main valve maintenance method
  • Oil pipe plugging bridge plug and Christmas tree main valve maintenance method

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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 Christmas tree main valve maintenance, in particular to an oil pipe plugging bridge plug and a Christmas tree main valve maintenance method. The oil pipe plugging bridge plug comprises an upper mandrel, an upper connector, a middle mandrel, an upper sliding sleeve, a lower sliding sleeve, a stop block connector, a lower mandrel, a ball seat, a main pushing cylinder, a fishing connecting cylinder, a blocking connector, a pressing cylinder, a lining and a lower end cap, wherein the upper connector is fixedly installed on the outer side of the upperend of the upper mandrel. The Christmas tree main valve maintenance method comprises the following steps that (1) a blowout preventer is additionally installed on the upper portion of a wellhead, anda coiled tubing is connected with the oil pipe plugging bridge plug and lowered into a well. The oil pipe plugging bridge plug is reasonable and compact in structure and ingenious in design, and a rubber cylinder assembly is expanded and a slip assembly is expanded outwards in the radial direction by shearing a first shear pin to complete setting; a one-way retaining assembly is enabled to fail by shearing a second shear pin; and the rubber cylinder assembly and the slip assembly are reset by shearing a third shear pin to complete deblocking, and the oil pipe plugging bridge plug and the Christmas tree main valve maintenance method have the characteristics of being efficient, stable and good in 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 Applications(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
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