초록 ▼

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 eccentrically therethrough and threads for interconnec

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 eccentrically therethrough and threads for interconnection with a tubing string. A fluid communication port extends through a sidewall of the tubular body member, and a shiftable sleeve 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 and/or hydraulic fluid. Fluid control means, such as a hydraulic fluid source conveyed from a downhole Hydraulic Power Unit to an internal piston, opens or closes the valve in response to electrical signals sent to the Hydraulic Power Unit from the earth's surface.

대표청구항 ▼

[ What is claimed is:] [1.] A fluid circulation apparatus for interconnection with a wellbore tubing string, comprising:a tubular body member having an eccentric longitudinal bore extending there through, and having means for interconnection with a tubing string;at least one fluid communication port

[ What is claimed is:] [1.] A fluid circulation apparatus for interconnection with a wellbore tubing string, comprising:a tubular body member having an eccentric longitudinal bore extending there through, and having means for interconnection with a tubing string;at least one fluid communication port extending through a sidewall of the tubular body member;valve means for selectively permitting and preventing fluid flow through the fluid communication port;means for biasing the valve means in a normally closed position; andfluid control means for operating the valve means in response to electrical signals sent to the control means from the earth's surface, comprising an electrically operated valve mounted within a space within the tubular body member, and adapted to selectively apply hydraulic fluid from a downhole source to open the valve means and to close the valve means in response to electrical signals sent by wires to the control means from the earth's surface.