Novel pressure blocking device for underground pressurized operation

Abstract

The invention relates to a pressure blocking device for underground pressurized operation. The device is used for realizing a temporary pressure blocking effect when the pressurized maintenance operation is carried out underground, breaking a central block after workover operation is completed, and enabling a shaft to be smooth. The device is simple in structure and convenient to implement and iscomposed of six parts: an expansion ring, a central pipe, a cone, a slips, a tension rod and a push ring. The tension rod is separated from the pressure blocking device after setting of the pressure blocking device and can be brought away from a well site, the expansion ring is expanded under force to achieve a blocking effect, manufacturing materials are manufactured from soluble metal materials(or soluble non-metal materials), and can be used at high temperature and high salinity, the pressure blocking device can achieve blocking removal through self-dissolution or human intervention, blocking can be achieved in advance through pressurizing the interior of a well through human intervention, the required pressure is small, and the influence on subsequent construction is small.

Description

technical field [0001] The invention designs a novel pressure blocking device for downhole pressure operation and a preparation method thereof. Background technique [0002] At present, domestic companies do not pay much attention to the pressurized operation, resulting in a large loss of profits in the later stage. The blocking function is unstable, and the processing of the blocking process takes too long, which reduces work efficiency. The research and development and expansion technology is not yet mature, causing damage to the environment and resources. with waste. Contents of the invention [0003] The object of the present invention is to provide a method for preparing a pressure blocking device, which is characterized by simple structure, stable operation, simple operation and improved work efficiency. [0004] Its preparation method of the pressure blocking device according to the present invention comprises the following steps: [0005] Center tube: processed a...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic companies do not pay much attention to the pressurized operation, resulting in a large loss of profits in the later stage. The blocking function is unstable, and the process...

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