Bridge plug with large drift diameter and setting method of bridge plug

Abstract

The invention discloses a bridge plug with a large drift diameter. The bridge plug comprises an upper joint, a central tube, a guiding shoe head and a bridge plug assembly; the upper joint is an annular part and is fixedly connected with the outer side of one end of the central tube in a sleeving mode; the central tube is a metal central tube, a soluble ball base is arranged at the end, close to the upper joint, of the central tube, and the central tube is a drillable metal part; the guiding shoe head is an annular part, is fixedly connected with the outer side of the other end of the central tube in a sleeving mode and is provided with a device used for being fixedly connected with a pull rod which is arranged in the bridge plug in a sleeved mode; the middle section of the central tube is sleeved with the bridge plug assembly which is located between the upper joint and the guiding shoe head. The invention further discloses a setting method of the bridge plug with the large drift diameter. The drilling polishing procedure of the bridge plug with the large drift diameter can be omitted, the problems of a long construction period, high operation cost and high construction risk brought by drilling polishing are solved, and the bridge plug is easier and more convenient to use and faster to construct.

Description

technical field [0001] The invention relates to the technical field of petroleum industry, in particular to a large-diameter bridge plug and a setting method thereof. Background technique [0002] In the field of petroleum industry, packers or bridge plugs are usually used to achieve isolation between layers and other processes. The role of bridge plugs is to seal layers of oil and gas wells. It has the characteristics of fewer construction procedures, accurate sealing positions, and large-scale fracturing. [0003] With the development of oil and gas fields and the continuous consumption of energy, unconventional oil and gas will become the direction of future oil and gas energy. Composite bridge plug multi-stage fracturing technology is currently the main technology used in the development of unconventional oil and gas such as shale gas reservoirs at home and abroad. This technology is widely used because of its simple tool string and less restrictions. After the drilling...

AI Technical Summary

Problems solved by technology

[0004] However, when the composite bridge plug is used later, in order to ensure the smooth flow of oil and gas, it is usually necessary to drill and grind the bridge plug as a whole to remove it. The drilling and grinding process takes a long time, and the circulation of drill cuttings is difficult. The cost is high, so it has relatively large limitations in the staged pressure stimulation of shale gas

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