Wells – Processes – With indicating – testing – measuring or locating
Patent
1994-06-02
1996-02-06
Melius, Terry Lee
Wells
Processes
With indicating, testing, measuring or locating
1661176, 166215, E21B 708, E21B 2300
Patent
active
054889898
ABSTRACT:
A deflecting tool or whipstock is oriented and anchored in a well casing during a single trip of a running string so that a window can be formed in the wall of the casing at a selected azimuth. The angular orientation of the deflecting tool is measured, and signals representative thereof are transmitted to the surface. When the desired orientation is obtained, the anchor is actuated to prevent movement of the deflecting tool, and the orientation adjusting and measurement and transmission tools are released from the whipstock and removed from the casing by withdrawing the running string which preferably is coiled tubing. Then a downhole motor and milling bit are run into the casing on coiled tubing and operated to form a window through the wall thereof opposite the deflection surface of the whipstock so that a new borehole can be drilled outside the casing.
REFERENCES:
patent: 4304299 (1981-12-01), Holland et al.
patent: 4397355 (1983-08-01), McLamore
patent: 5232058 (1993-08-01), Morin et al.
patent: 5287921 (1994-02-01), Blount et al.
Doremus Denis
Leising Larry J.
Bouchard John H.
Dowell, a division of Schlumberger Technology Corporation
Garrana Henry N.
Melius Terry Lee
Vick, Jr. John E.
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