Drill pipes and casings utilizing multi-conduit tubulars

Details Drill pipes and casings utilizing multi-conduit tubulars Drill pipes and casings utilizing multi-conduit tubulars

E - Fixed Constructions

21

B

255/24, 26/78

E21B 17/02 (2006.01)

Patent

CA 1335811

A drill pipe and coupling method for drilling subterranean formations. The pipe includes an outer casing that is threadable at both ends for connection to other similar castings; at least one tubular conduit floating within the outer casing; and a coupler for coupling various outer casings of other drill pipes. The tubular conduit is designed to carry pressurized fluid. The coupler includes a seal subassembly for sealingly receiving and supporting the independent tubular conduits; a collar for connecting the seal subassembly to a drill pipe; and a lift subassembly for connecting the seal subassembly to another drill pipe.

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