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Method of producing connection hoop for petroleum steel pipe

A technology for petroleum steel pipes and production methods, which is applied in the direction of pipes/pipe joints/fittings, threaded connections, passing components, etc., which can solve the problems of low metal internal structure density, large deviation of steel pipe wall thickness, and long cycle of changing specifications, etc., to achieve The effects of strong market adaptability, small wall thickness deviation, and high wall thickness precision

Inactive Publication Date: 2005-07-13
西安纳特石油技术有限责任公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the disadvantages of the existing production process that requires large investment in equipment, large deviation of steel pipe wall thickness, long period for changing specifications and low density of metal internal structure

Method used

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Embodiment Construction

[0009] The present invention includes the following steps in sequence, ① sawing the circular cast steel ingot into short blanks, ② putting the metal round blanks that have been cut off one by one into the pre-designed stamping die after heating, and using a hydraulic press to form a A coupling round billet, and then heat treatment, ③The final product is formed after threading.

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PUM

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Abstract

The invention relates to the processing field of components used in the petroleum industry, in particular to a production method of a coupling for petroleum steel pipes. The present invention overcomes the disadvantages of the existing production process that requires large investment in equipment, large deviation in wall thickness of steel pipes, long period for changing specifications and low density of internal metal structures. In order to overcome the disadvantages of the prior art, the solution of the present invention is: a production method of couplings for petroleum steel pipes, which is special in that it includes the following steps in sequence: ① first saw the circular hacksaw into short blanks ; ② Use the force method of the mold to directly punch the blank into a semi-finished coupling, and then perform heat treatment; ③ Thread processing.

Description

Technical field: [0001] The invention relates to the processing field of components used in the petroleum industry, in particular to a production method of a coupling for petroleum steel pipes. Background technique: [0002] The petroleum industry is an industry that requires a large amount of steel pipes. From the sealing of the well wall after oil drilling to the oil outlet channels in the oil production process, steel pipes are inseparable. These steel pipes are connected by threads. This kind of connection requires a part called a coupling. The coupling is an important part of the oil pipe. It is a steel pipe that is one size larger than the original steel pipe. Connected internal thread. At present, the general method of domestic coupling production is: firstly, the round cast steel ingot is rolled and pierced into long steel pipes, then shortened into short coupling semi-finished products, and finally threaded. The disadvantages of this method are: 1. The cost is hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L15/00
Inventor 赵克枫温建生
Owner 西安纳特石油技术有限责任公司
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