Multifunctional tail pipe hanger

Abstract

The invention belongs to a tool for oil extraction in an oil field, and particularly relates to a multifunctional tail pipe hanger. The multifunctional tail pipe hanger comprises an upper jointer (1), a back-up nut (2), a clamp cover (12), a clamp (13), an upper cone (10), a lower cone (15), an upper compression ring (16), a lower compression ring (22) and the like; the lower end of the upper joint (1) is provided with a retrieving head (5); a releasing pawl spring (3) is arranged in the upper joint (1) and the retrieving head (5); an upper cylinder sleeve (4) is arranged on the periphery of the retrieving head (5) and is fixed by the back-up nut (2); the lower part of the retrieving head (5) is provided with a connection sleeve (6); a deblocking pawl spring (7) is arranged between the connection sleeve (6) and the upper cylinder sleeve (4); in the deblocking pawl spring (7), a central pipe (8) is arranged at the lower end of the connection sleeve (6); the upper cylinder sleeve (4) and the deblocking pawl spring (7) are positioned and fixed by an anti-rotating pin (9); the upper cone (10) is arranged in the lower part of the upper cylinder sleeve (4); and the multifunctional tail pipe hanger has high weight capacity and reliable functions, and is flexible and convenient.

Description

technical field [0001] The invention belongs to tools for oil production in oil fields, in particular to a multifunctional liner hanger. Background technique [0002] At present, with the rapid development of my country's industry, the continuous improvement of oilfield mining technology and the continuous increase of oil production, when new wells are exploited in oilfields, liner hangers are often used to connect a certain amount of screen pipes for completion operations, and in terms of unsealing methods It is also required to realize two or more ways of unsealing to satisfy, and the existing liner hanger does not possess multiple ways of unsealing. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned technical deficiencies, and provide a multifunctional liner hanger with large suspension force and capable of realizing more than two unsealing methods. [0004] The technical solution adopted by the present invention to...

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Problems solved by technology

[0002] At present, with the rapid development of my country's industry, the continuous improvement of oilfield mining technology and the continuous increase of oil production, when new wells are exploited in oilfields, liner hangers are often used to connect a certain amount of screen pipes for completion operations, and in terms of unsealing methods It is also required to realize two or more unsealing methods before it can be satisfied, and the existing liner hanger does not have a variety of unsealing methods

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