Modular housing for a rotary steerable tool

Details Modular housing for a rotary steerable tool Modular housing for a rotary steerable tool

2007-09-11

2007-09-11

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Axially spaced opposed bore wall engaging guides

C175S061000, C175S045000, C175S325300, C175S024000

Reexamination Certificate

active

10869540

ABSTRACT:
According to one embodiment of the invention, a rotary steerable tool includes a drive shaft configured to be coupled to a drill string at an upper end thereof and configured to be coupled to a drilling tool at a lower end thereof. A middle portion of the drive shaft is disposed axially between the upper and lower ends and has a smaller diameter than each of the upper and lower ends. The drive shaft further includes a housing rotatably coupled externally to the drive shaft and at least one housing module coupled to a respective opening in the housing at an axial location corresponding to the middle portion of the drive shaft.

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Notification of Transmittal of The International Search Report and the Written Opinon of the International Searching Authority for International Patent Application No. PCT/US2004/018990, filed Jun. 15, 2004 (12 pages).
Durant, Marcus; “Slimhole Rotary Steerable System Now A Reality”, Schlumberger Oilfield Services, Drilling Contractor, Jul./Aug. 2002, pp. 24-25.
Notification of Transmittal of International Search Report and Written Opinion, International application No. PCT/US2004/019275, 15 pages, Sep. 11, 2004.

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