Non-coupling good-sealing bending-resistant tooth-width-variable wedge type threaded oil well pipe structure

Abstract

The invention discloses a non-coupling good-sealing bending-resistant tooth-width-variable wedge type threaded oil well pipe structure which comprises a pipe body outer thread section, a pipe body inner thread section, an oil well pipe body, an inner thread left sealing section, an outer thread right sealing section, an inner thread right sealing section and an outer thread left sealing section. The pipe body outer thread section is connected to the right end of the oil well pipe body, the outer thread left sealing section is arranged between the pipe body outer thread section and the oil well pipe body, the outer thread right sealing section is arranged on the right end portion of the pipe body outer thread section, the pipe body inner thread section is connected to the left end of the oil well pipe body, the inner thread right sealing section is arranged between the pipe body inner thread section and the oil well pipe body, and the inner thread left sealing section is arranged on the left end portion of the pipe body inner thread section. By means of the non-coupling good-sealing bending-resistant tooth-width-variable wedge type threaded oil well pipe structure, the connection sealing performance, the bending resistance, the compression load resistance and the torque resistance of screwed joints are improved notably and effectively.

Description

technical field [0001] The invention discloses an oil well pipe structure used in the oil drilling industry. The invention is specifically a collarless, high-seal, bending-resistant, variable-tooth-width wedge-shaped threaded oil well pipe structure. Background technique [0002] At present, the threaded connection structure of oil casing and pipe in the oil well pipe industry is basically improved and innovated in accordance with API SPEC 5B "Code for Machining, Measurement and Inspection of Casing, Tubing and Line Pipe Threads". The overall connection quality is compared with API The quality of the threaded connection required by the standard has gradually been greatly improved, but it still cannot meet the requirements of oil field exploitation. Gradually, all oil fields in the world are putting forward higher and more ideal requirements for threaded connections, especially the requirements for the main performance indicators of oil well pipes are becoming more and more s...

AI Technical Summary

Problems solved by technology

[0002] At present, the threaded connection structure of oil casing and pipe in the oil well pipe industry is basically improved and innovated in accordance with API SPEC 5B "Code for Processing, Measurement and Inspection of Casing, Tubing and Line Pipe Threads". The overall connection quality is compared with API The quality of the threaded connection required by the standard has been gradually improved, but it still cannot meet the requirements of oil field production.

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