Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1994-06-07
1995-06-06
Britts, Ramon S.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 73, 175321, E21B 706
Patent
active
054214203
ABSTRACT:
Directional drilling is achieved by a weight-on-bit control mechanism that is attached to a drill bit having asymmetrical cutters. A valve in the mechanism temporarily interrupts or bypasses mud flow toward the bit to correspondingly change the downward force acting thereon during a portion of each revolution. The bit will drill preferentially on that side of the bottom surface of the borehole where the downward force is increased, and thereby cause the borehole to curve in an azimuthal direction on such side.
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Malone David L.
Orban Jacques J.
Britts Ramon S.
Kanak Wayne I.
Moseley David L.
Schlumberger Technology Corporation
Tsay Frank S.
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