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Technology for removing defects of connection thread of petroleum drilling tool

A thread and drilling tool technology, which is applied in the field of processing to eliminate the thread defects of oil drilling tools, can solve the problems of insufficient processing technology, low surface hardness, easy bonding, etc., and achieve the reduction of wear, prolongation of life, and improvement of product surface hardness Effect

Inactive Publication Date: 2012-10-24
陈伟琛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above-mentioned insufficient processing technology of the existing drilling tool lathe, the surface hardness is low, easy to bond, and the service life is short.

Method used

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  • Technology for removing defects of connection thread of petroleum drilling tool
  • Technology for removing defects of connection thread of petroleum drilling tool

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Experimental program
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Effect test

Embodiment Construction

[0014] The specific method is: use the laser to scan the surface hardened oil drilling tool surface where the hardness needs to be increased, and use the high temperature of the laser to quickly dissolve and condense the metal surface, so that the crystal grains in the molten metal do not have time to form. To achieve the purpose of refining the grain, so that the surface of the hardened oil drilling tool has good hardness, and the drilling tool itself has good plasticity.

[0015] After laser hardening treatment of the hardened layer on the surface of the drill tool, the hardness increases from unhardened HRC31°C to HRC55°C.

[0016] The oil drilling tool connecting thread defect elimination technology of the present invention is very simple and convenient to manufacture, and can be manufactured according to the drawings shown in the description.

[0017] Except for the technical features described in the description, all are known technologies by those skilled in the art.

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Abstract

The name of the invention is a technology for removing defects of a connection thread of a petroleum drilling tool, and the invention relates to the field of drilling tool processing of the petroleum industry. A thread part is scanned by a laser after a lathe machines a thread; the defects of the thread part after being machined are fused and the surface of the thread is subjected to phase-change hardening, and a thread work surface is grinded by a thread grinding head, so as to improve the smoothness of the thread surface and ensure the hardness of a hardened layer.

Description

technical field [0001] The invention relates to the field of drilling tool processing in the petroleum industry, in particular to a processing method for scanning thread surface parts by laser to achieve hardening, smooth surface and eliminating thread defects of oil drilling tools. Background technique [0002] At present, the existing technology only relies on the lathe to process the thread of the drilling tool. The surface hardness is low, and it is easy to cause thread bonding. After machining, the microscopic defects on the surface cannot be eliminated, and it is easy to form microscopic stress concentration points. Under alternating loads, the microscopic defects continue. The extension expands, causing a fracture accident. Contents of the invention [0003] In order to solve the above-mentioned insufficient processing technology of the existing drilling tool lathe, the characteristics of low surface hardness, easy bonding, and short service life. [0004] The tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G9/00
Inventor 陈伟琛
Owner 陈伟琛
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