Drill string system

Details Drill string system Drill string system

1975-05-09

1977-07-19

Peters, Jr., Joseph F.

Cutlery

166241, 175325, F16C 126

Patent

active

040365395

ABSTRACT:
A drill string system, having a greatly reduced tendency for balling and sticking in oil field clay or sticky shale, is provided on its non-bearing surfaces, with an adherent plastic covering, e.g. a polyurethane polymer. The plastic coating is applied to the non-bearing steel surfaces of the string, which have been cleaned of rust and have been coated with a primer.

REFERENCES:
patent: 3420323 (1969-01-01), Owens
patent: 3468753 (1969-09-01), Vincent et al.
patent: 3616190 (1971-10-01), Shaw
patent: 3916998 (1975-11-01), Bass et al.
patent: 3948575 (1976-04-01), Rosser
Crandalon by Xenex Corporation.
Report on Crandalon Panels Submerged in Oyster Creek Waretown, New Jersey by R. Turner June 18, 1973.

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