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Tubing plug

A tubing plug and tapered sleeve technology, which is applied in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve the problems of difficult and low removal efficiency of the tubing plug.

Active Publication Date: 2020-09-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an oil pipe plug, which can solve the problems that the oil pipe plug is difficult to remove and the removal efficiency is low

Method used

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] figure 1 A schematic structural view of an oil pipe plug according to an embodiment of the present invention is shown. as attached figure 1 As shown, the oil pipe plug includes: lifting joint 1, fixed sleeve 2, fishing joint 3, main body 4, limit shaft 5, guide head 6, pawl assembly 7, seat seal assembly 8, spring 9, first The limiting component 10 and the second limiting component 11 .

[0038]The first end of the fixing sleeve 2 is provided with an inversion edge, the first end of the lifting joint 1 is located in the inner cavity of the fixing sleeve 2, and the first end of the lifting joint 1 and the first end of the fixing sleeve 2 are passed through the shear nails. Connection, the first end of the fishing joint 3 is lo...

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Abstract

The invention discloses a tubing plug, and belongs to the technical field of oil and gas well exploitation. The tubing plug comprises a lifting joint, a fixed sleeve, a fishing joint, a body, a limiting shaft, a guide head, a pawl assembly, a setting assembly, a spring, a first limiting component and a second limiting component. In the tubing plug, when the tubing plug moves upwards, the pawl assembly is clamped on an oil tube, after the second limiting component moves towards the interior of a second blind hole of the body, the setting assembly is promoted by the elastic action force of the spring to generate expansion deformation, and setting to the oil tube is achieved. Then, the fishing joint is lifted up so as to drive the fixed sleeve to move upwards, after the first limiting component moves towards the interior of a first blind hole of the body, the setting assembly is driven to move upwards, and therefore setting of the setting assembly to the oil tube is canceled. Then, the setting assembly drives the body to move upwards, and then the limiting shaft is driven to move upwards. After the operation that the limiting shaft pulls the pawl assembly fails, the pawl assembly is driven through the guide head to move upwards, and the tubing plug is taken out.

Description

technical field [0001] The invention relates to the technical field of oil and gas well production, in particular to an oil pipe plug. Background technique [0002] When oil and gas wells are operated on site, in order to maintain the energy of the formation and reduce environmental pollution, the operation is usually carried out under pressure. In order to prevent the oil and water in the oil and gas well from leaking to the ground and causing environmental pollution, it is necessary to use a tubing plug to block the tubing in the oil and gas well. seal up. Although the oil pipe plug can better seal the oil pipe, after the oil pipe is sealed by the oil pipe plug, it cannot be pulled out again, that is to say, the oil pipe plug is irreversible to the seat seal of the oil pipe. Only by lifting out the oil pipe containing the oil pipe plug, can the oil pipe plug be taken out, thereby increasing the difficulty of taking out the oil pipe plug and reducing the efficiency of taki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12
CPCE21B33/12
Inventor 邓庭胡旭辉邢丽洁赵培郝思嘉李海鹏赵嫣然
Owner PETROCHINA CO LTD
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