Force-increasing upward-pulling jam releasing device based on hydraulic pressure

Abstract

The invention provides a force-increasing upward-pulling jam releasing device based on hydraulic pressure, which aims to solve the problems of the complex structure and complexity in assembly and control of an existing upward-pulling jam releasing device. The device comprises an anchoring part, a force increasing part and an anti-rotation part, wherein the anchoring part comprises an upper joint and a hydraulic anchor; the force increasing part comprises a sealing storage pipe, a first connecting pipe and a piston rod end socket which are connected in sequence, the sealing storage pipe is connected with the hydraulic anchor, an annular piston is installed in the first connecting pipe, and a first piston rod and a second piston rod which are installed on the annular piston are in sliding connection with the sealing storage pipe and the piston rod end socket correspondingly; the first piston rod is a hollow pipe and communicates with the anchoring part and an inner cavity of the annular piston; a first hydraulic cavity is formed between the annular piston and the piston rod end socket, and a first high-pressure flow channel is formed in the annular piston to communicate the inner cavity of the annular piston with the first hydraulic cavity; and the upper end of the anti-rotation part is connected with the force increasing part, the lower end of the anti-rotation part is connected with a fishing device, and a circumferential limiting effect is achieved. The device has the advantages of the simple structure and oil path, convenience in assembly and control and rapidity and convenience in operation, and upward-pulling jam releasing can be performed repeatedly.

Description

technical field [0001] The invention relates to the technical field of downhole pipe string unblocking and fishing equipment, in particular to a hydraulically-based force-increasing lifting and unplugging device. Background technique [0002] In recent years, with the rapid development of my country's economy, the development of oil and gas fields and the continuous attenuation of non-renewable resources, in order to alleviate the situation that my country's oil and gas resources are overly dependent on imports, major domestic oil fields have accelerated the exploration and development of oil and gas resources. In the development process of oil and gas wells, especially in the middle and late stages of oil well exploitation, production stimulation measures need to be implemented. During the drilling and workover operations and production stimulation measures, pipe string jamming accidents often occur. Once a stuck accident occurs, it will be very troublesome to deal with, wh...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydraulically-intensified force-up and release device to solve the problems of complex structure, cumbersome assembly and manipulation in the existing device for pulling out and releasing cards

Images