Boring or penetrating the earth – With signaling – indicating – testing or measuring
Reexamination Certificate
2006-09-11
2010-06-15
Gay, Jennifer H (Department: 3676)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
C175S048000, C175S050000, C367S084000
Reexamination Certificate
active
07735579
ABSTRACT:
A method and apparatus used to transmit information to the surface from a subsurface location during the process of drilling a bore hole is described. A novel pressure pulse generator or “pulser” is coupled to a sensor package, a controller and a battery power source all of which reside inside a short section of drill pipe close to the bit at the bottom of the bore hole being drilled. The assembled apparatus or “MWD Tool” can be commanded from the surface to make a measurement of desired parameters and transmit this information to the surface by encoding data in pressure pulses generated by a pulser valve that includes a stator and a rotor which may be open and closed to create pressure pulses.
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Gopalan Manoj
Poe Stephen B.
Gay Jennifer H
Harcourt Brad
Ozinga Martin G.
Phillips Murrah PC
Teledrift, Inc.
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