Fluid circulation apparatus

Details Fluid circulation apparatus Fluid circulation apparatus

1994-07-29

1995-11-14

Schoeppel, Roger J.

Wells

With electrical means

Electrical motor

166319, 175 61, 175 62, E21B 404

Patent

active

054657873

ABSTRACT:
A fluid circulation apparatus for interconnection with a wellbore tubing string for particular use in drilling deviated wellbores, such as with coiled tubing. The circulation apparatus has a tubular body member with a longitudinal bore extending therethrough and threads for interconnection with a tubing string. A fluid communication port extends through a sidewall of the tubular body member, and a valve is placed thereacross for selectively permitting and preventing fluid flow through the fluid communication port. The valve is biased in a normally closed position by way of a spring. Fluid control means, such as a hydraulic fluid source conveyed through the tubing string, operates the valve in response to electrical signals sent to the fluid control means from the earth's surface.

REFERENCES:
patent: 2833517 (1958-05-01), Bobo
patent: 3941190 (1976-03-01), Conover
patent: 4373582 (1983-02-01), Bednar et al.
patent: 4768598 (1988-09-01), Reinhardt
patent: 5127477 (1992-07-01), Schultz
patent: 5236047 (1993-08-01), Pringle et al.
patent: 5251703 (1993-10-01), Skinner
patent: 5314032 (1994-05-01), Pringle et al.
patent: 5316094 (1994-05-01), Pringle
patent: 5323853 (1994-06-01), Leismer et al.
patent: 5373898 (1994-12-01), Pringle

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