Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2006-05-16
2006-05-16
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S171000, C166S380000, C166S381000
Reexamination Certificate
active
07044241
ABSTRACT:
A method for drilling boreholes using casing (16) as the drill string and for advancing a casing string toward the bottom of the borehole is described. In the method, the drilling assembly (26) is used as a guide over which the drill string (16) is advanced toward the bottom of the borehole prior to removing the drilling assembly from the wellbore.
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Bennett Jones LLP
Tesco Corporation
Thompson Kenneth
LandOfFree
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