Steerable drilling system

Details Steerable drilling system Steerable drilling system

2011-04-19

2011-04-19

Bagnell, David J (Department: 3676)

Boring or penetrating the earth

Tool shaft advanced relative to guide insertable in...

With anchor for guide engaging hole side wall

C175S061000, C175S308000

Reexamination Certificate

active

07926592

ABSTRACT:
A steerable drilling system including a bias unit and a separator. The separator is arranged to remove particulate matter from the supply of pressurized drilling mud to the actuator of the bias unit. The separator includes a hydrocyclone located upstream of the actuators. The hydrocyclone includes a housing defining a substantially conical recess having a large diameter end and a small diameter end. An inlet is in fluid communication with the large diameter end for providing the drilling mud thereto. A first outlet is in fluid communication with the small diameter end for outlet of relatively dirty mud. A second outlet is in fluid communication with the large diameter end for outlet of a supply of relatively clean mud for the plurality of actuators.

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patent: 0033654 (1981-08-01), None

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