Wells – Processes – Parallel string or multiple completion well
Reexamination Certificate
2006-07-18
2006-07-18
Gay, Jennifer H. (Department: 3672)
Wells
Processes
Parallel string or multiple completion well
C166S055700, C166S117600, C166S297000
Reexamination Certificate
active
07077206
ABSTRACT:
A section mill is positioned below an exit guide in a drill string assembly used to mill a section of steel casing below the whipstock and which as the section mill moves down and mills along the section of casing, causes the whipstock to be lowered down adjacent the milled-out casing and allows the drill bit and drill string to be run along the surface of the exit guide and into the earth formation. Alternatively, the section mill is positioned above the exit guide in a drill string assembly after the section mill has milled out in an appropriate length of the steel casing, the tubing string pulls both the section mill and the exit guide up to a position where the exit guide is adjacent the area of formation which has been exposed by milling along the steel casing.
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Kennedy Michael D.
Shappert Neil D.
Gay Jennifer H.
Re-Entry Technologies, Inc.
The Matthews Firm
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