Reciprocating circular blind plate device

A reciprocating, blind plate technology, applied in wellbore/well components, earth-moving drilling, flushing wellbore, etc., can solve the problems such as failure to establish circulation when the pipe string is blocked, and achieve reasonable structure, risk reduction, and use. handy effect

Active Publication Date: 2015-07-22
CNPC XIBU DRILLING ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a reciprocating circulation blind plate device, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the current non-circulatory blind plate exists under the pipe string. The problem that circulation cannot be established when entering well conditions such as resistance

Method used

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  • Reciprocating circular blind plate device

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Embodiment Construction

[0015] 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.

[0016] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the figure 1 For example, the positional relationship of top, bottom, left, right, etc. is determined according to the layout direction of the drawings in the specification.

[0017] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0018] as attached figure 1 , 4 As shown, the reciprocating circulation blind plate device includes a base 1, a body 4 and a sliding blind plate 5; the base 1 is a ring structure, and the left inner cavity of the base 1 is a horn cavity 2 with a large left and a small right, and the base 1 There is a ring-shaped...

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Abstract

The invention relates to the technical field of blind plate devices adopted for oil and gas field exploitation, in particular to a reciprocating circular blind plate device. The reciprocating circular blind plate device comprises a base, a body and a sliding blind plate, wherein the base is of an annular structure, an inner cavity in the left part of the base is a horn cavity becoming smaller from left to right, an annular installing groove is formed in the right end of the base, and the outer wall of the right part of the base and the inner wall of the right part of the body are fixedly installed together; the sliding blind plate comprises an installing head and a working plate, the left part of the installing head is shaped like an annular frustum matched with the horn cavity, the right part of the installing head is matched with the inner cavity of the base, and an axial through hole is formed in the middle of the working plate. The blind plate device is reasonable and compact in structure and convenient to use, the blind plate device is equivalent to a non-circular blind plate under normal conditions, when casing running meets resistance and circulation needs to be set up, a new circulating channel can be set up for well flushing through reverse pressure build-up, blockage is eliminated, and the risk of well cementing and completion is reduced; the base and the sliding blind plate can be drilled away easily, and the blind plate device can be widely applied to various occasions.

Description

technical field [0001] The invention relates to the technical field of blind plate devices used in the development of oil and gas fields, and relates to a reciprocating circulation blind plate device. Background technique [0002] Blind plate is a common cementing and completion tool in oil and gas field exploitation. Non-recyclable blind plate is widely used in deep wells, medium-deep wells or complex wells because of its high strength and good sealing performance. Afterwards, the circulation cannot be established when the pipe string is run into well conditions such as obstruction, which may easily lead to accidents such as casing pulling. Contents of the invention [0003] The present invention provides a reciprocating circulation blind plate device, which overcomes the deficiencies of the prior art, and can effectively solve the problem that the current non-circulatory blind plate cannot establish circulation under well conditions such as pipe string running into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
CPCE21B21/10E21B33/13
Inventor 徐少俊张新文郭新超郭建军杨睿戴蕾王浩
Owner CNPC XIBU DRILLING ENG
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