Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2005-05-03
2005-05-03
Hartmann, Gary S. (Department: 3671)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C340S853400, C340S853600
Reexamination Certificate
active
06886644
ABSTRACT:
An apparatus and method for horizontally drilling provides for detecting subsurface features and avoiding such features during closed-loop control of an underground drilling machine. A horizontal drilling system includes a base machine capable of propelling a drill pipe rotationally and longitudinally underground. A cutting tool system is coupled to the drill pipe, and a control system controls the base machine. A detector is employed to detect a subsurface feature. A communication link is utilized for transferring data between the detector and the control system. The control system uses the data generated by the detector to modify control of the base machine in response to detection of the subsurface feature.
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Allen Christopher T.
Stump Gregory S
Crawford & Maunu PLLC
Hartmann Gary S.
Vermeer Manufacturing Company
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