Boring or penetrating the earth – Automatic control – Of fluid pressure below ground
Reexamination Certificate
2006-08-29
2006-08-29
Tsay, Frank (Department: 3672)
Boring or penetrating the earth
Automatic control
Of fluid pressure below ground
C175S048000, C175S232000
Reexamination Certificate
active
07096975
ABSTRACT:
One or more components of a wellbore drilling assembly utilize a modular construction to facilitate assembly, disassembly, repair and/or maintenance of a wellbore drilling assembly and/or to extend the overall operating capabilities of the drilling assembly. In one embodiment, a modular construction is used for an APD Device, a motor driving the modular APD Device, a comminution device, and an annular seal. Individual modules can be configure have different operating set points, operating parameters and characteristics (e.g., rotational speeds, flow rates, pressure differentials, etc.) and/or different responses to given environmental factors or conditions (e.g., pressure, temperature, wellbore fluid chemistry, etc.). In one embodiment, the high-pressure seals used in conjunction with the APD Device and/or motor is a hydrodynamic seal that provides a selected leak or flow rates. Optionally, the seal is modular to provide different degrees of leak rates and/or different functional characteristics.
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Aronstam Peter
Fincher Roger
Fontana Peter
Grimmer Harald
Krueger Sven
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Tsay Frank
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