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Tubing plug

A technology of tubing plugs and drogue sleeves, which is applied in wellbore/well components, sealing/packing, earthwork drilling and production, etc. It can solve the problems of difficulty and low extraction efficiency of tubing plugs, and achieve the goal of reducing the difficulty of extraction, The effect of improving extraction efficiency

Active Publication Date: 2022-03-29
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 an oil pipe plug, which belongs to the technical field of oil and gas well exploitation. The oil pipe plug includes: a lifting joint, a fixed sleeve, a fishing joint, a main body, a limit shaft, a guide head, a ratchet assembly, a seat seal assembly, a spring, a first limiting component and a second limiting component. In the present invention, when the oil pipe plug moves upward, the pawl assembly is stuck on the oil pipe, and after the second limiting member moves into the second blind hole of the main body, the elastic force of the spring promotes the seat seal assembly to expand Deformation to realize the sealing of the tubing. Lift the fishing joint afterwards to drive the fixed sleeve upward, and after the first stopper moves to the first blind hole of the main body, drive the seat seal assembly upward, thereby canceling the seat seal of the seat seal assembly to the oil pipe. Afterwards, the seat seal assembly drives the main body upward, and then drives the limit shaft upward. After the ratchet assembly fails to be pulled by the limit shaft, the pawl assembly is driven upward by the guide head to realize the removal of the oil pipe plug.

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 Patents(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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