System for controlling the discharge of drilling fluid

Details System for controlling the discharge of drilling fluid System for controlling the discharge of drilling fluid

2006-11-14

2006-11-14

Thompson, Kenneth (Department: 3672)

Wells

Expansible anchor or casing

Expansible casing

C417S383000, C417S395000

Reexamination Certificate

active

07134489

ABSTRACT:
A drilling system is provided for drilling a borehole into an earth formation, the drilling system comprising pump means for pumping drilling fluid into the borehole and discharge means for discharging drilling fluid from the borehole. The discharge means comprises at least one pressure chamber for temporarily accommodating drilling fluid being discharged from the borehole, and control means for controlling the fluid inflow into each pressure chamber.

REFERENCES:
patent: 4406595 (1983-09-01), Robertson et al.
patent: 4460318 (1984-07-01), Horton
patent: 4611578 (1986-09-01), Heimes
patent: 4755111 (1988-07-01), Cocchi et al.
patent: 5806612 (1998-09-01), Vorhoff et al.
patent: 5890549 (1999-04-01), Sprehe
patent: 6033192 (2000-03-01), Wood
patent: 6102673 (2000-08-01), Mott et al.
patent: 00/79092 (2000-12-01), None
patent: 01/20120 (2001-03-01), None
International Search Reported dated Dec. 18, 2002.

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