Surface controlled blade stabilizer

Details Surface controlled blade stabilizer Surface controlled blade stabilizer

1982-04-16

1983-10-04

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

166321, 166332, 166374, E21B 700, E21B 1700, E21B 3410

Patent

active

044073771

ABSTRACT:
Drill string stabilizer apparatus, controllable to expand and retract entirely from the surface by control of drill string pressure, wherein increase of drill string pressure from the surface closes a valve to create a piston means which is moved down by drill string pressure to expand the stabilizer blades, said valve being opened and the piston moving upward upon reduction of drill string pressure to retract the stabilizer blades. Upward and downward movements of the piston and an actuator sleeve therebelow are controlled by a barrel cam acting between the housing and the actuator sleeve.

REFERENCES:
patent: Re25471 (1963-11-01), Fredd
patent: 3370657 (1968-02-01), Antle
patent: 3675718 (1972-07-01), Kanady
patent: 3703104 (1972-11-01), Tamplen
patent: 3986554 (1976-10-01), Nutter
patent: 4071101 (1978-01-01), Ford
patent: 4135577 (1979-01-01), Nelson et al.
patent: 4258804 (1981-03-01), Richey et al.

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