Drill string protection

Details Drill string protection Drill string protection

1993-11-19

1995-08-01

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

166242, E21B 1710

Patent

active

054373425

ABSTRACT:
A wear-resistant sheath for a cylindrical drill string component, includes a cylindrical fiber-reinforced matrix snugly embracing the drill string component. Embedded in the sheath is a spaced array of hard substantially cylindrical pins, each of which has a body having an opposed pair of ends. The pins are disposed substantially radially of the sheath, with one end of each pin disposed substantially at the outer surface of the sheath, the other end being preferably disposed in contact with the component and embedded therein to lock the sheath to the component.

REFERENCES:
patent: 3480094 (1969-11-01), Morris
patent: 3948575 (1976-04-01), Rosser
patent: 3993368 (1976-11-01), Jurgens et al.
patent: 4190126 (1980-02-01), Kabashima
patent: 4296973 (1981-10-01), Hartwell
patent: 4452325 (1984-06-01), Radd et al.
patent: 4708203 (1987-11-01), Walker
patent: 4796670 (1989-01-01), Russell et al.

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