Steering of bent housing mud motor downhole rotation device

Details Steering of bent housing mud motor downhole rotation device Steering of bent housing mud motor downhole rotation device

2011-08-02

2011-08-02

Stephenson, Daniel P (Department: 3676)

Boring or penetrating the earth

Processes

Boring curved or redirected bores

C175S073000, C175S027000

Reexamination Certificate

active

07987927

ABSTRACT:
A steerable drilling system includes a drill string carrying a bent housing, the bent housing containing or having associated therewith a drive motor arranged to drive a drive shaft angled to an axis of part of the drill string adjacent the bent housing, and an orientating motor permitting relative rotation between the drill string and the bent housing, the orientating motor driving the output shaft in a reverse direction relative to a direction of rotation of the drill string to form a curve in a borehole being formed.

REFERENCES:
patent: 1892217 (1932-12-01), Moineau
patent: 3084631 (1963-04-01), Bourke
patent: 5343956 (1994-09-01), Coronado
patent: 5778992 (1998-07-01), Fuller
patent: 6047784 (2000-04-01), Dorel
patent: 6092610 (2000-07-01), Kosmala et al.
patent: 6543132 (2003-04-01), Krueger et al.
patent: 6568076 (2003-05-01), Bottos et al.
patent: 6601658 (2003-08-01), Downton
patent: W02004036043 (2004-04-01), None

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