Multi-sealing casing pipe repairing and connecting device

Abstract

The invention relates to a multi-seal casing pipe connector which comprises an outer cylinder (1) and a guiding shoe (2), the lower end of the outer cylinder (1) is connected with the upper end of the guiding shoe (2), a lower sealing ring (22) is arranged on the inner wall of the guiding shoe (2), a lower distance ring (3), a lead sealing ring (4), an upper distance ring (5), a control card (6) and an inner cylinder (7) are sequentially arranged in the outer cylinder (1) from the guiding shoe (2) to the top, and an upper sealing ring (13) is arranged on the inner wall of the outer cylinder (1) above the inner cylinder (7). A spiral slip (8) is arranged in the inner barrel (7), a clamping key installed on the inner barrel (7) is arranged at the lower end of the spiral slip (8), a clamping block (61) installed on the inner barrel (7) is arranged on the control clamp (6), and a key block (72) is arranged between the inner barrel (7) and the outer barrel (1). According to the utility model, the advantages of the existing rubber sealing element sleeve repairing and connecting device and the metal lead sealing element sleeve repairing and connecting device are integrated, and a triple sealing structure is adopted, so that the sealing effect is better, the service life is longer, and the structure is more compact.

Description

technical field [0001] The invention relates to petroleum tools, in particular to a multi-seal bushing adapter. Background technique [0002] Casing adapter is the new and old casing connector when the damaged casing is taken out of the downhole, and then the new casing is run in. It can keep the inner diameter of the casing unchanged and play a sealing role. At present, a packer-type casing joint used in oil fields is sealed by rubber seals. Although the sealing effect of rubber seals is very good, its sealing effect has a certain timeliness, and the general working life is difficult to exceed ten years. year. Another type of lead-sealed bushing adapter uses metal lead to deform under pressure to seal the annulus, thereby producing a sealing effect. Although the sealing life of the lead seal can be very long, due to structural limitations, the outer diameter of this bushing adapter is designed to be relatively large, and its use in a position with a small annulus is limit...

AI Technical Summary

Problems solved by technology

Although the sealing life of the lead seal can be very long, due to structural limitations, the outer diameter of this kind of bushing adapter is designed to be relatively large, and the use in the position with a small annulus is limited.

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