Dual concentric drillpipe

Details Dual concentric drillpipe Dual concentric drillpipe

F - Mech Eng,Light,Heat,Weapons

16

L

255/24, 285/63

F16L 39/00 (2006.01) E21B 17/18 (2006.01) E21B 21/12 (2006.01) F16L 9/18 (2006.01)

Patent

CA 926377

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