Boring or penetrating the earth – With means movable relative to tool or shaft to control...
Patent
1987-05-27
1989-12-26
Kisliuk, Bruce M.
Boring or penetrating the earth
With means movable relative to tool or shaft to control...
166154, 166318, E21B 3414
Patent
active
048891991
ABSTRACT:
A downhole drilling device utilizing a spring-loaded sleeve within the casing for controlling circulation of fluid material. A plastic, i.e., deformable ball is used to block a flow opening in the sleeve for positioning the sleeve and aligning flow ports. Subsequently, the ball is deformed and the drilling operation continues. In one form, an expandable packer may be operated to close off the annulus about the casing.
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patent: 3908769 (1975-09-01), Schuyf et al.
patent: 4574894 (1986-03-01), Jadwin
Dunsmuir George H.
Hinds William R.
Kisliuk Bruce M.
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