Drill pipe and drill collar containing molded casing protector a

Details Drill pipe and drill collar containing molded casing protector a Drill pipe and drill collar containing molded casing protector a

1974-10-24

1976-04-06

Wood, Jr., M. H.

Cutlery

166241, F16C 126

Patent

active

039485757

ABSTRACT:
A string of drill pipe having lengths of pipe connected by enlarged couplings and operable in a well casing has located between couplings casing protectors comprising annular rings of an oil impermeable and gas impermeable synthetic resin molded around the drill pipe. The casing protectors have a slick, hard outer surface for substantially non-damaging contact with the casing.
The casing protectors can be molded about drill collar to also provide protection against damage to well casing.

REFERENCES:
patent: 3063760 (1962-11-01), Gifford
patent: 3560060 (1971-02-01), Morris

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