Fast blocking device of pipe opening

Abstract

The invention provides a fast blocking device of a pipe opening, which is applicable to the technical field of controllable no-well-killing operation. The fast blocking device comprises a shell, wherein one end of the shell is provided with a slip containing cavity, and a pushing mechanism cavity is formed at the other end of the shell; a sliding block can be movably arranged in the pushing mechanism cavity; the two ends of a spring push against the shell and the sliding block respectively; one end of the sliding block is connected with a central pipe, one end of the central pipe is protruded from the shell and forms a sealing part which can be in sealing connection with the inner wall of a blocked pipe column; the end part of the pushing mechanism cavity is connected with a handle which can push the sliding block and drive the central pipe to move axially; the slip containing cavity is provided with a plurality of slips along the peripheral direction; the slips can extend outwards to be protruded along the radial direction of the slip containing cavity to be fastened with the inner wall of the pipe column. The fast blocking device provided by the invention has the advantages that the structure is simple and compact, the installation and the maintenance are convenient and fast; fast blocking to the pipe opening can be realized, and an overflowing device is also arranged, so that the safe and environmental-friendly effects are achieved.

Description

technical field [0001] The invention relates to a pipe mouth plugging device, in particular to a pipe mouth quick plugging device suitable for controllable snubbing operation, which is used to prevent the well head from being out of control and causing environmental pollution due to fluid leakage in the pipe during the operation. Background technique [0002] With the development of controllable snubbing operation technology, it is necessary to solve the problems of blowout prevention and anti-fouling of the wellhead in the pipe without plugging string. The commonly used wellhead plugging devices in the past include rubber cap type and rubber plug type. The plugging efficiency is low, and it is not easy to lift out after plugging; the screw type plugging device, although it bears a large plugging pressure, the plugging is relatively slow. It is difficult to adapt to the working conditions of snubbing operation. [0003] In order to solve the problems of blowout prevention a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fast plugging device with compact structure and reliable performance suitable for snubbing operation, and at the same time, it can solve the problems of blowout prevention and pollution prevention at the wellhead in the pipe

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