Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Reexamination Certificate
2007-03-26
2010-02-02
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
Enlargement of existing pilot throughbore requiring...
C175S062000
Reexamination Certificate
active
07654340
ABSTRACT:
A horizontal directional drilling system is used to drive operation of a guidable reamer assembly connected to a drill string. The guidable reamer assembly preferably has a cutting member with a central longitudinal axis and a support member also having a central longitudinal axis. The longitudinal axes of the cutting member and the support member are collinear when the reamer assembly is in the non-steering position and laterally displaced when in the steering position. The assembly and method of this invention provide for increased control of reaming operations and product pipe placement.
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Gunsaulis Floyd R.
Mullins H. Stanley
Payne David R.
Self Kelvin P.
Stangl Gerald A.
Stephenson Daniel P
The Charles Machine Works, Inc.
Tomlinson & O'Connell PC
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