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Natural gas well fixed tubing plug

A tubing plug and well fixation technology, which is applied in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve the problems of inconvenient salvage, poor sealing effect, and large delivery resistance of the tubing plug. Easy to salvage, low friction resistance, reasonable sealing structure and seating mode

Active Publication Date: 2017-10-10
CHONGQING ZHENGHUA DRILLING EQUIP CO LTD
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Problems solved by technology

[0002] With the increasingly active oil and gas exploration and development activities, the exploration fields are rapidly extending from land to sea, from shallow formations to deep formations, and from old areas to new areas. Exploration and development technologies have developed rapidly. In addition to the huge losses caused by blowout out of control, my country's drilling well control technology has developed rapidly, but the current tubing plug has high delivery resistance, poor sealing effect, and is not easy to salvage

Method used

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  • Natural gas well fixed tubing plug

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Embodiment Construction

[0012] figure 1 It is a structural schematic diagram of the present invention, as shown in the figure: the gas well fixed tubing plug of this embodiment includes a working cylinder 1 and a core arranged in the working cylinder 1 for blocking the working cylinder 1; the core It is clamped and sealed with the working cylinder 1. The two ends of the working cylinder 1 are provided with connecting threads that match the oil pipes of natural gas wells. The working cylinder 1 is connected with the oil pipe feet. Into the working cylinder 1 and set the seal, use the snubbing machine to send it into the well to the set depth under pressure to realize the downhole tubing operation; when salvaging the core, use fishing tools to salvage, and the overall outer diameter of the core is less than When lifting the core, there is no jamming phenomenon between the core and the inner wall of the tubing, and the core can be pulled out without resistance to realize the opening of the tubing, which...

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Abstract

The invention discloses a natural gas well fixed oil pipe stopper, which comprises a work cylinder and a core arranged in the work cylinder for blocking the work cylinder; the core and the work cylinder are clamped and sealed; Natural gas well fixed tubing plug has reasonable sealing structure and clamping method, reliable operation, small feeding friction resistance, and good sealing effect. It has a locking and unlocking mechanism, which can realize the sealing and opening of the tubing, and is convenient for fishing.

Description

technical field [0001] The invention relates to the technical field of gas production in natural gas wells, in particular to a fixed oil pipe plug for natural gas wells. Background technique [0002] With the increasingly active oil and gas exploration and development activities, the exploration fields are rapidly extending from land to sea, from shallow formations to deep formations, and from old areas to new areas. Exploration and development technologies have developed rapidly. In addition to the huge losses caused by out-of-control blowout, my country's drilling well control technology has developed rapidly, but the current tubing plug has high delivery resistance, poor sealing effect, and is not easy to salvage. Contents of the invention [0003] In view of this, the object of the present invention is to provide a fixed oil pipe plug for natural gas wells, which has low feeding friction resistance, good sealing effect, has a locking and unlocking mechanism, can realize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/10
Inventor 何龙刘乔平何志祥申洪何章明唐亮林元华秦祖奎
Owner CHONGQING ZHENGHUA DRILLING EQUIP CO LTD
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