Hydraulic repeating switch device

Abstract

The invention relates to a hydraulic repeated switch device, and belongs to the technical field of petroleum machinery. The hydraulic repeated switch device is composed of a communicating joint, a sliding sleeve, a pressure balancing sleeve, a check block, a spring sleeve, a spring, an adjusting ring, a lower joint and the like. Under the action of high-pressure liquid, the sliding sleeve generates downward pushing force through the designed area difference of the sliding sleeve, the check block is pushed to move downwards to compress the spring, and when the pressure reaches a certain value and the downward pushing force is larger than the spring force, the sliding sleeve automatically moves downwards to be opened, and a liquid outlet in the communicating joint is opened; and after pressure relief, the spring automatically rebounds under the action of elastic force, the sliding sleeve is pushed to move upwards and reset, and the liquid outlet is closed. Multiple times of repeated opening and closing of the device are achieved through the lower thrust generated by the sliding sleeve under the action of hydraulic pressure and the elastic force of automatic springback of the spring,the defect that a tubular column needs to be repeatedly lifted up and down when ball throwing is not in place is avoided, the problems that steel wire and coiled tubing operation is long in construction period and high in operation cost are solved, the multiple operation requirements of yield increasing transformation measures are met, and the operation well occupation period is shortened.

Description

technical field [0001] The invention relates to the technical field of petroleum machinery, in particular to a hydraulic repeat switch device. Background technique [0002] The downhole switch is an important supporting downhole tool for measures such as increasing production and injection in oilfields. It is especially suitable for technical fields such as layered water injection, layered testing, oil layer protection, and reservoir transformation. There are mainly two types of hydraulic switch devices currently used, one One is a one-time hydraulic switch device, which is easy to operate, but only has the function of one-time opening and closing, and cannot be reused. Only one switch action can complete all the measures. This kind of device has a small range of use and cannot meet the needs of repeated use of downhole fixed string operations. The other is the hydraulic multiple switch device. The hydraulic multiple switch device generally uses ball Suppressing pressure or...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the above problems, thereby providing a hydraulic repeat switch device. The high-pressure liquid passes through the downward thrust generated by the designed area difference on the outer diameter of the sliding sleeve and the elastic force of the automatic rebound of the spring to realize the repeated opening and closing of the hydraulic device. The problem of high operating cost and long construction period of the hydraulic device can realize repeated killing, acidizing and other measures without moving the string, reduce the operation cycle, improve the efficiency of operation and construction, and meet the multiple operation needs of production stimulation and transformation measures

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