F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
26/156, 189/60,
F16L 15/00 (2006.01) E21B 17/042 (2006.01) F16L 15/06 (2006.01)
Patent
CA 1322773
ABSTRACT Threaded tubular interference fit interconnections and related production techniques are disclosed that are useful with large diameter tubular members, including pipe bodies, that can function as casing for oil, gas, geothermal, disposal and other wells. Preferably there is root-to-crest and/or flank-to-flank interference between nose and inner portions of male and female threads of the disclosed interconnections, to substantially seal them against leakage at the internal and/or external pressure rating of the pipe body, and a run-out portion of the male thread and a corresponding portion of the female thread engage one another with interference to retain threaded engagement between said run- out and corresponding portions at the axial yield strength of the pipe body and also at the internal and/or external pressure rating of the pipe body. These connections, when applied to API line pipe or other tubular products, can allow them to properly function as large diameter casing exhibiting easy and economical manufacture with existing machinery, easy installation in the field, good balance between geometric and load capacity transparency, and freedom from some undesirable characteristics of prior products.
614047
Borden Ladner Gervais Llp
Equivalent S.a.
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