Repeatedly-used sliding sleeve

Abstract

The invention relates to the technical field of packer devices in the completion practice of oil and gas fields, in particular to a repeatedly-used sliding sleeve which comprises an upper joint, an inner sliding sleeve, a double-female joint, a lower joint and a sealing cylinder. An upper joint inner annular boss is integrally fixed to the inner wall of the upper portion of the upper joint. An upper limiting annular boss is integrally fixed to the outer wall of the middle of the upper joint. An upper joint upper annular groove and an upper joint lower annular groove are formed in the outer wall of the lower end of the upper joint from top to bottom, and the outer diameter of the upper joint upper annular groove and the outer diameter of the upper joint lower annular groove are sequentially decreased. The outer diameter of the upper joint lower annular groove is matched with the inner diameter of the double-female joint. A joint first upper annular groove and a joint second upper annular groove are formed in the inner wall of the upper portion of the double-female joint from bottom to top, and the inner diameter of the joint first upper annular groove and the inner diameter of the joint second upper annular groove are sequentially increased. The repeatedly-used sliding sleeve is reasonable and compact in structure and convenient to use, an auxiliary tool can be conveniently tripped in or lifted up, the inner sliding sleeve can be opened and closed under the condition that the good working conditions are guaranteed, the flow of fluid can be effectively adjusted after the inner sliding sleeve is opened and enables the inside and the outside to be communicated, and rational exploitation of a gas reservoir is achieved.

Description

technical field [0001] The invention relates to the technical field of isolation devices in well completion operations in oil and gas fields, and relates to a multiple-use sliding sleeve. Background technique [0002] Well completion is an important technical means to link drilling and oil production operations. At the same time, well completion is an extremely risky downhole operation. Therefore, the success of well completion will directly affect the success or failure of a well. Especially at present, as the exploration of unconventional oil and gas fields such as shale gas and tight oil continues to deepen, people's research on the development of such oil and gas reservoirs is also continuously strengthened. For the development of this type of oil and gas reservoirs, fracturing well completion is also an indispensable technical means. Regardless of the completion of conventional oil and gas reservoirs or the completion of oil and gas wells in unconventional oil and gas ...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a multiple-use sliding sleeve, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the conventional sliding sleeve cannot be closed after opening. Slip sleeves to protect oil and gas reservoirs

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