Sleeved drill pipe

Details Sleeved drill pipe Sleeved drill pipe

1981-12-07

1984-03-13

Bryant, III, James E.

Pipes and tubular conduits

Combined

With hose protector

138109, 138143, 138145, 138153, 138172, 308 4A, 175325, E21B 1710

Patent

active

044361181

ABSTRACT:
A one-piece metal wear sleeve, circumferentially homogeneous, is secured by epoxy to the outer periphery of a drill pipe. The inner diameter of the sleeve is less than the outer diameter of tool joints at the end of the drill pipe. The sleeve is centrifugally cast of two materials, including a tough, strong material such as an iron alloy at its inner portion and a hard non-abrasive wear resistant material such as alloy steel at its outer portion to resist wear on the sleeve, e.g. when it is run in open hole or in a cased hole. The outer portion is homogenous and has a smooth outer periphery so as to reduce wear on the casing when the pipe is run in cased hole.

REFERENCES:
patent: 2207150 (1940-07-01), Hirsch et al.
patent: 3411837 (1968-11-01), Schellstede
Industrial Products Catalog.

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