Boring or penetrating the earth – Processes – Boring with specific fluid
Reexamination Certificate
2011-08-02
2011-08-02
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Processes
Boring with specific fluid
C175S054000, C175S206000, C175S207000, C166S075150
Reexamination Certificate
active
07987928
ABSTRACT:
An excavation system for forming a wellbore through a subterranean formation, the system employing pressurized drilling fluid with impactors mixed therein. The pressurized fluid with impactors is directed to a drill string having a drill bit with nozzles on its lower end. The fluid impactor mixture is discharged from the nozzles and against the formation, wherein the impactors contact, compress, and fracture the formation to excavate through the formation. The system includes an impactor injection system that injects impactors into a stream of pressurized drilling fluid to form the mixture. The injection system operates at substantially the same pressure as the pressurized drilling fluid.
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Carlson Thomas Alan
Colvin Kenneth
Galloway Greg
Terry Jim
Tibbitts Gordon
Coy Nicole A
Neuder William P
PDTI Holdings, LLC
Vedder Price P.C.
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