Ceramic slip composite bridge plug

Abstract

The invention discloses a composite bridge plug made of ceramic slips, which comprises a central tube. The outer circumference of the central tube is sequentially provided with a push ring, an upper positioning cone, a rubber tube, a lower positioning cone and a spacer ring. The spacer ring is fixedly connected with the central tube, the push ring, the upper positioning vertebral body, the rubber tube and the lower positioning vertebral body can all move along the axial direction of the central tube, and the upper positioning One end is in contact with the push ring, a plurality of lower bases are provided on the circumference of the lower positioning vertebral body, one end of the lower base is in contact with the spacer ring, and ceramic slips are provided on the outer circumferences of the upper base and the lower base; The ceramic slip composite bridge plug of the present invention is quickly sent to the target layer through a cable or a coiled tubing, and is sealed by gunpowder or hydraulic setting to realize the isolation of production layers or non-target layers, so as to achieve the purpose of changing wellbore conditions and achieving isolation , to meet the follow-up construction requirements. After the construction is completed, it can achieve fast milling and flowback effects, which improves work efficiency.

Description

technical field [0001] The invention belongs to the technical field of oil exploitation equipment, and in particular relates to a ceramic slip composite bridge plug. Background technique [0002] In the process of oil and gas well testing, when there are multi-layer formations, there are differences between the layers of oil, gas and water layers, and measures such as layered testing and layered stimulation are required. At this time, plugging and layering tools are required. For a long time, drillable and millable metal bridge plugs have been widely used as oil and gas well layer separation devices in oil fields at home and abroad. Existing bridge plugs made of metal have disadvantages such as easy jamming and difficulty in drilling and milling after construction. Once an accident occurs during construction, it is quite troublesome to deal with. Especially when it is used for fracturing, acidizing, sealing water and other processes in the stratification or section of devia...

AI Technical Summary

Problems solved by technology

Existing bridge plugs made of metal have disadvantages such as easy jamming and difficulty in drilling and milling after construction operations. Once an accident occurs during construction, it is quite troublesome to deal with

Especially when it is used for fracturing, acidizing, sealing water and other processes in the stratification or section of deviated wells and horizontal wells, due to the influence of their special well body structure, it is more difficult to drill and remove metal bridge plugs in such wells. It is prone to problems such as eccentric grinding and milling of casing, sticking, and difficulty in flowback of cuttings, and it is more complicated to deal with problems than vertical wells

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