Salvageable bridge plug

Abstract

The invention provides a salvageable bridge plug, and relates to the technical field of oil exploration equipment. The Salvageable bridge plug comprises a guide head, a main pipe is fixedly connected in the guide head, a first main pressing ring is transversely and slidably connected with the right part of the outer side wall of the main pipe, and a first slip fixing ring is transversely and slidably connected with the middle right part of the outer side wall of the main pipe; and a plurality of sets of slip pieces of the first part are evenly and fixedly connected to the outer side wall of the first slip fixing ring, and the middle right part of the outer side wall of the main pipe is transversely and slidably connected with a first conical auxiliary ring. A first conical auxiliary ring which is in sliding connection with the interior of a T-shaped groove and is fixed by a T-shaped structure composed of the other part of a second limiting column and a second sliding rod is driven to slide upwards, so that a conical body of the first conical auxiliary ring is loosened from a slip piece of a first slip fixing ring, and the slip piece of the first slip fixing ring is further loosened from the inner wall of an oil pipe; and salvage can be completed by utilizing ground extraction equipment to extract the bridge plug, automatic setting releasing salvageable performance of the bridge plug is achieved, and the salvageable bridge plug is worthy of being popularized vigorously.

Description

technical field [0001] The invention relates to the technical field of bridge plugs, in particular to a fishable bridge plug. Background technique [0002] The permanent bridge plug was formed in the early 1980s. Because of its less construction process, short period and accurate sealing position, it has been widely used in oil and gas well sealing as soon as it came out, basically replacing the previous cement plug sealing layer. The process technology has become the main sealing layer technology for oil test wells to seal the tested layers and carry out back-testing. For special formations such as dry formations, water formations, gas formations, and abnormally high pressures that appear during oil testing in mid-to-shallow formations, in order to facilitate subsequent oil testing and seal abandoned formations, such bridge plugs are usually used for sealing. Some wells with no development plans in the short term are closed with permanent bridge plugs. In addition, the br...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a fishable bridge plug, which solves the problems of unsealing and fishing and increasing the lowering process of steel balls

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