Drill tube

Details Drill tube Drill tube

B - Operations, Transporting

23

P

26/21

B23P 15/28 (2006.01) E21B 17/00 (2006.01)

Patent

CA 2027969

Abstract A method of manufacturing a drill tube (10) for drilling operations, involving centrifugally casting a plurality of tube lengths (11) and welding the tube lengths together to form welds (12), whereafter threaded end fittings (13, 15) are welded to form welds (14, 16) at opposite ends of the drill tube. Alternatively the threaded end fittings are partially formed during centrifugal casting of the tube lengths to form the ends of the drill tube and completed by appropriate machining and thread forming operations.

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