Casing joint

Details Casing joint Casing joint

F - Mech Eng,Light,Heat,Weapons

16

L

285/63, 166/68

F16L 15/00 (2006.01) E21B 17/042 (2006.01) F16L 15/04 (2006.01) F16L 15/06 (2006.01)

Patent

CA 1040682

ABSTRACT OF THE DISCLOSURE Box and pin members have two axially spaced thread sections separated by a radial step zone which includes, for one member e.g. the pin member, an annulus having an axial undercut, a frusto-conical end face and a radially outwardly bulging peripheral surface, which sealingly engages a slightly contoured inner surface of the box member in the step zone, while the end face of the annulus bears against a complementary face in the step zone of the box member. These stop faces supplement complementary thread stop faces respectively at the end of the pin member and in the box member.

236461

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