R & D and Application of Φ73 mm Friction-welded All Titanium Alloy Drill Pipe
Elaborated here in the article is the R & D process of the Φ73 mm friction-welded all titanium alloy drill pipe.Also described in detail are the forging technology for the pipe body and the application effectiveness of the said drill pipe.Thanks to a certain special forging process for the pipe body and threading process,the Φ73 mm friction-welded all titanium alloy pipe featuring consistent performance and long service life is developed.The drill pipe has been succe-ssfully used in the T4326CH2 ultra short radius horizontal well of Tahe Oild Field,resulting in a highest build-up rate up to 55°/30 m,which has set three records,i.e.,the first largest well borehole curvature,the least side drilling footage and the shortest side drilling time in the Northwest China Work Area.
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