Overlaying process of drilling tool for petroleum extraction

A technology of drilling tools and petroleum, which is applied in the field of surface treatment of pipes to achieve the effects of improving wear resistance, hardness and melting depth

Inactive Publication Date: 2012-02-08
SHANGHAI TUBE COTE PETROLEUM PIPE COATING +1
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[0018] The surfacing process of the drilling tool used in the petroleum development of the present invention is to first clean the surface of the surfacing area of ​​the drilling tool (including the female end and the male end of the drilling tool, the female end, the male end and the middle thickened section of the heavy-weight drilling tool) Treatment to remove rust spots and oil stains on the surface; then send the surfacing area of ​​the cleaned drill tool into an intermediate frequency heating furnace to heat to 200-250℃; then clean the surface of the surfacing area of ​​the drill tool after heating ; The drill tool can be pushed into the automatic welding machine, and the automatic control carbon dioxide welding machine (the automatic control carbon dioxide welding machine uses Binzel’s 401 straight-handled water-cooled welding gun) uses carbon steel welding wire to weld the surfacing area of ​​the drill tool During the electric welding, the powder spraying mechanism spray...

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Abstract

The invention provides an overlaying process of a drilling tool for petroleum extraction. Primarily, an overlaying region of the drilling tool is electrically welded by an automatic control carbon dioxide welding machine by using a carbon steel welding wire; pure tungsten powder which is preheated to 200 DEG C is sprayed to an electrical welding position by a powder spraying mechanism during the electrical welding to perform facing; and finally, a tungsten carbide-containing thickening wear-resistant belt is formed by performing facing at the overlaying region of the drilling tool. By adopting the overlaying process of the drilling tool for petroleum extraction, the forming of a weld joint and the fusion depth of a welding wire and a parent metal are effectively increased, and the hardness of a welding layer is improved; and thus, the wear resistance of the drilling tool and the anti-friction quality of the drilling tool to a bushing are improved, and the service life of the drilling tool is prolonged by more than two times.

Description

technical field [0001] The invention relates to a surface treatment process of a pipe, in particular to a surfacing welding process of a drilling tool for oil exploitation. Background technique [0002] With the rapid development of the oil drilling industry, more and more drilling tools are used for oil exploration, and the damage of drilling tools in drilling is also becoming more and more serious. The existing technology adopts plasma spray welding and carbon dioxide protected hard surface welding technology to form a layer of wear-resistant band on the vulnerable surface of the drilling tool, which plays a certain positive role in protecting the damaged surface of the drill pipe during drilling and drilling . However, the weld seam used as a welding deposit has higher and higher requirements for the protection of the drill pipe, and the user has higher and higher requirements for the service life of the drill tool. Existing technologies can no longer meet the needs. ...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/16B23K9/235
Inventor 曹育红高智海梁龙昌胡舟王建刚
Owner SHANGHAI TUBE COTE PETROLEUM PIPE COATING
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