Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1979-10-03
1981-06-02
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 73, 175325, E21B 708
Patent
active
042706190
ABSTRACT:
A downhole stabilizing tool communicating with a fluid conductive drill string having a sleeve assembly mounted for movement within the tool housing between selected positions and having camming members therewith for actuating stabilization pads mounted with the tool housing for lateral movement thereof in response to movement of the sleeve assembly between the selected positions, pawl members with the tool housing for cooperating with the sleeve assembly for limiting movement of the sleeve assembly to the selected positions, and pawl engaging members with the sleeve assembly for limiting movement of the sleeve assembly to the selected positions. The actuator assembly includes a piston body member adapted to be positioned within the stabilizing tool and having programming members therewith for cooperatively engaging compatibly formed engaging surfaces with the stabilizing tool that are also spaced apart a programmed distance for moving the stabilization pads between the selected positions. The method of the present invention includes steps of preprogramming the actuator assembly prior to running the same into the fluid conductive drill string for selectively engaging the stabilizing tool to expand the stabilization pads laterally as desired.
REFERENCES:
patent: 3123162 (1964-03-01), Rowley
patent: 3370657 (1968-02-01), Antle
patent: 3424256 (1969-01-01), Jeter et al.
patent: 3593810 (1971-07-01), Fields
patent: 3974886 (1976-08-01), Blake, Jr.
patent: 4046204 (1977-09-01), Takaoka et al.
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