Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate
2005-11-15
2005-11-15
Dang, Hoang (Department: 3672)
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
C166S055000, C166S055700, C175S080000
Reexamination Certificate
active
06964303
ABSTRACT:
A method and apparatus for horizontally drilling in wells utilizing a shoe assembly at the down hole end of upset tubing. The shoe assembly includes a fixed section and a rotatable section suspended below the fixed section. An electric motor and associated batteries and a gyroscope carried on the rotatable section enable an operator on the surface to selectively rotate and position the rotatable section to any desired angular location for drilling a hole in the well casing. After one or more holes have been cut in the casing, a drill assembly can be removed from the upset tubing and be replaced by a high pressure blaster nozzle to bore into the formation zones. The gyroscope enables the operator to accurately position the rotatable section to the same locations at which the holes have been cut. The drill assembly includes an electric motor with an associated battery, flexible drive shaft, and a hole saw.
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Blair Paris E.
Mazorow Henry B.
Sanfelice Chris
Dang Hoang
Pearne & Gordon LLP
Performance Research & Drilling, LLC
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