Oil tube, coupling and coupling making method

Abstract

The invention relates to the technical field of oil tubes and couplings, in particular to an oil tube, a coupling and a coupling making method. The oil tube comprises an upper oil tube body, wherein the bottom of the upper oil tube body is connected with an upper flange plate sleeve; upper connecting holes are uniformly and fixedly formed in the upper flange plate sleeve; a sealing gasket is correspondingly arranged on the end surface, which is away from the upper oil tube body, of the upper flange plate sleeve; a lower flange plate sleeve is correspondingly arranged on the end surface, whichis away from the upper flange plate sleeve, of the sealing gasket; the end surface, which is away from the sealing gasket, of the lower flange plate sleeve is connected with a lower oil tube body; a lower connecting hole is fixedly formed in the lower flange plate sleeve; the lower oil tube body penetrates through the lower flange plate sleeve and extends into the lower flange plate sleeve; and anouter threaded section is fixedly arranged on the lower oil tube body and is positioned in the flange plate sleeve. The oil tube has the advantages that by arrangement, connection is stable, the anticorrosion property is high, wear resistance is also high, the sealing property is good and the like.

Description

technical field [0001] The invention relates to the technical field of oil pipes and clamps, in particular to a production method of oil pipes, couplings and couplings. Background technique [0002] With the development of the petroleum industry, a large number of deep wells and ultra-deep wells appear in oil field development and production, and the geological conditions and operating environment are more complex and harsh. Hundreds of oil pipes are threaded to form a pipe string with a length of thousands of meters, which is lowered into the wellbore for oil production. The connection between the oil pipes is usually connected by a tubing coupling. The oil pipe coupling has a tubular coupling body, and the coupling body Both ends of the oil pipe have connecting internal threads. When using the oil pipe coupling to connect the oil pipe, the oil pipe with the external thread is screwed into the internal thread of the oil pipe coupling to form a continuous oil transportation ...

AI Technical Summary

Problems solved by technology

The connection seal between the oil pipe collar and the oil pipe in the above-mentioned prior art is generally to wrap glass wool or hemp rope on the external thread of the oil pipe first, and then screw the oil pipe wrapped with glass silk or hemp rope into the oil pipe collar, and the sealing effect is not good. Well, crude oil leakage is prone to occur during use, and the connection effect is not stable, and it does not have anti-corrosion effect, which reduces its service life

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