A passive disintegrating soluble bridge plug

Abstract

The invention relates to the technical field of petroleum exploitation, in particular to a passively disassembled soluble bridge plug, comprising a central shaft, a seal, a vertebral body, slips, a lower joint, a central shaft, a sealing member, a vertebral One or more or all of the body and the lower joint are split structures. In the passively disassembled dissolvable bridge plug of the present invention, one or more or all of the central shaft, seal, vertebral body, and lower joint may be of a split structure. When the key components of the dissolvable bridge plug adopt a split structure , The quick disassembly of the bridge plug can be realized by destroying the joints of the split parts; the fragmented parts formed by the disintegration of the split parts are scattered downhole and fully dissolved with time without recycling, which meets the engineering requirements.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a passively dismantled soluble bridge plug. Background technique [0002] Bridge plug refers to a tool used in the process of oil and gas exploitation and transportation to cut off gas and liquid transportation channels. In the process of developing low-porosity and low-permeability oil and gas fields represented by shale gas, bridge plugs are widely used in staged and layered fracturing processes to block harmful gas and liquid transportation and pressure transmission channels, restricting Pressure fluid enters the destination layer. After the fracturing operation is completed, it is generally necessary to remove the bridge plugs installed during the fracturing process. The earliest method of removing bridge plugs was to drill holes in the bridge plugs through coiled tubing. This method not only has high costs and high construction safety risks, but also makes it diff...

AI Technical Summary

Problems solved by technology

However, the current soluble bridge plugs generally have no problem in dissolving according to the nominal index under laboratory conditions, but under complex downhole conditions, the dissolving effect is not ideal, and the well fluid used as the dissolving solution does not flow well when there is a lot of sand sediment downhole. Sufficient, affecting the dissolution progress, especially in gas-producing layers, it may even lead to lack of well fluid, and even affect the dissolution effect

Images