Pressure expansion type soluble bridge plug

Abstract

The invention provides a pressure expansion type soluble bridge plug. The pressure expansion type soluble bridge plug comprises a pull rod, wherein threads are arranged at the upper end part of the pull rod and are used for being connected with a setting tool; threads are arranged at the lower end part of the pull rod and are used for being connected with the upper end part of a pull cap; an expansion head, a central pipe, a cone, a slip and a base are sequentially mounted on the pull rod from the upper end part to the lower end part; the lower end part of the expansion head is in threaded connection with the upper end part of the central pipe; a rubber barrel, a rubber barrel shoulder protection assembly, a limiting joint, a lock ring and the cone are sequentially arranged on the central pipe in a sleeving manner; the lower end part of the limiting joint is in threaded connection with the upper end part of the cone; the lock ring is mounted in the joint of the limiting joint and the cone; and the inner surface of the lock ring is meshed with the outer surface of the central pipe. According to the pressure expansion type soluble bridge plug, the rubber barrel is of a pressure expansion type structure, and a rubber barrel protection component is not required at the upper end part, so that the structure is simplified; the rubber barrel integrates the advantages of expansion and compression in a sealing manner, so that the sealing is more reliable; and a locking structure of the rubber barrel is changed from slip locking to the lock ring, so that the processing difficulty of the component and the length of the tool are reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of oil and gas field development, and in particular to a compressible dissolvable bridge plug. Background technique [0002] The Chinese patent document publication number is CN108678707A to provide a kind of dissolvable bridge plug for fracturing, comprising: a central tube, the first end of the central tube has a protrusion protruding radially outward, and the second end of the central tube is arranged outside Limiting part; Anti-rotation key, set on the central tube through the first anti-rotation mechanism, and located between the raised part and the limit piece; Pushing mechanism, Set on the anti-rotation key through the second anti-rotation mechanism; Rubber cartridge mechanism, the rubber cartridge mechanism is set on the anti-rotation key through the third anti-rotation mechanism, the rubber cartridge mechanism is located between the push mechanism and the limiter; the first...

AI Technical Summary

Problems solved by technology

However, the soluble bridge plug in this technology has many structural parts, and the design has defects, such as long length and small inner diameter, and it does not use the

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