Composite assembly having improved load transmission between a f

Details Composite assembly having improved load transmission between a f Composite assembly having improved load transmission between a f

1997-09-30

2000-04-18

Browne, Lynne H.

Pipe joints or couplings

Nonmetal to metal

Internal member

285328, 29428, 138174, F16L 3300

Patent

active

060506121

ABSTRACT:
A composite drill pipe has an improved means of attaching a metal end fitting to a composite tubular member using corresponding annular grooves in the metal end fitting and the composite tubular member. In addition to annular grooves for axial loads, a plurality of axial grooves can also be included to accommodate greater torsional loads. The composite pipe body can also include a buildup made of a compliant rubber layer, a composite overwrap, and a wear pad in order to reduce the effective buckling node spacing to even further increase the axial load capability.

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