Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1994-11-28
1996-04-02
Schoeppel, Roger J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 74, 175107, 1753252, E21B 704
Patent
active
055032354
ABSTRACT:
A method for causing a drill string to progressively deflect at preselected length intervals in proportion to the rate of flow therethrough allowing the drill string to follow a resulting curved well bore is described. The drill string utilizes a plurality of axially spaced deflection subs each of which responds to preselected manipulations of the rate of fluid flow therethrough to deflect its center line. Flow control signals at the surface describe when the deflection of particular subs become activated.
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patent: 4834196 (1989-05-01), Falgout, Sr.
patent: 4895214 (1990-01-01), Schoeffler
patent: 5117927 (1992-06-01), Askew
patent: 5259467 (1993-11-01), Schoeffler
patent: 5368111 (1994-11-01), Benoit et al.
Jeter John D.
Schoeppel Roger J.
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