Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2005-05-17
2005-05-17
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S076000, C175S073000
Reexamination Certificate
active
06892830
ABSTRACT:
The device contemplated provides a method for positioning the drill bit in a drilling operation to achieve small changes in hole angle or azimuth as drilling proceeds. Two different positions are available to the operator. The first is a straight ahead position where the tool essentially becomes a packed hole stabilizer assembly. The second position tilts the bit across a rotating fulcrum to give a calculated offset at the bit-formation interface. The direction that the bit offset is applied in relation to current hole direction is controlled by positioning the orienting pistons prior to each drilling cycle, through the use of current measurement-while-drilling (MWD) technology. Components of the tool comprise a MWD housing, upper steering and drive mandrel, non-rotating position housing, lower drive mandrel splined with the upper mandrel, rotating fulcrum stabilizer and drill bit.
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Kutinsky David P.
Noe Paul
Anderson Ronald M.
Bagnell David
Bomar Shane
NQL Energy Services Canada Ltd.
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