hanging plug

Abstract

The invention provides a hanging plug. The hanging plug comprises a center rod; a connecting sleeve which can move axially along the center rod sleeves the center rod; a sealing device sleeves the connecting sleeve; the sealing device comprises a rubber cylinder and an extrusion portion; the connecting sleeve is provided with a boss which can be matched with the extrusion portion to limit and extrude the rubber cylinder; a hanging device sleeves the upper portion of the sealing device through the connecting sleeve; the hanging device comprises a clamping jaw which can be folded and unfolded; the outer wall surface of the clamping jaw is provided with a protruding portion which is used for hanging. According to the hanging plug, the clamping jaw can be folded when passing through a small inner diameter of small wellhead cross and can be unfolded and hung on a large cross through the protruding portion when reaching the position of a large cross hanger, the boss of the connecting sleeve can be matched with the extrusion portion to limit and extrude the rubber cylinder to achieve the short plugging, and accordingly the hanging plug can adapt to the hanger plugging in the controllable snubbing operation process.

Description

technical field [0001] The invention relates to a nozzle plugging tool, in particular to a suspension plug suitable for temporarily plugging a wellhead hanger when the sucker rod operation equipment is disassembled during oil well controllable snubbing operation. Background technique [0002] The controllable snubbing operation technology of oil well can reduce the pollution of the oil formation by killing fluid during the operation process, improve the operation efficiency and reduce the operation cost. For temporary plugging at the wellhead hanger position, a tool that can pass through the small wellhead cross with a small inner diameter and then complete the plugging at the hanger position of the large cross with a large inner diameter in the cavity. [0003] There are mainly two types of existing plugging tools, one is directly connected to the wellhead hanger through a threaded tool to complete the plugging, but it cannot pass through the small wellhead cross with a sma...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the plugging tool in the prior art cannot pass through the small wellhead cross with a small inner diameter and complete the plugging at the hanger position of the large wellhead cross with a large inner diameter in the cavity, the present invention provides a hanging plug, Able to pass through the small cross at the wellhead, and then complete short-term plugging at the suspension position of the large cross

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