Wells – Processes – Producing the well
Reexamination Certificate
2006-07-11
2006-07-11
Bagnell, David (Department: 3672)
Wells
Processes
Producing the well
C166S050000, C166S250150, C166S268000, C166S312000, C166S313000
Reexamination Certificate
active
07073595
ABSTRACT:
A method for controlling pressure of a dual well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone using a drill string. The articulated well bore is horizontally offset from the substantially vertical well bore at the surface and intersects the substantially vertical well bore. The method includes drilling a drainage bore into the subterranean zone. The method includes pumping a drilling fluid through the drill string when drilling the drainage bore. The method includes pumping a pressure fluid down the substantially vertical well bore when drilling the drainage bore. The pressure fluid mixes with the drilling fluid to form a fluid mixture returning up the articulated well bore which forms a frictional pressure that resists fluid flow from the subterranean zone.
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Merendino, Jr. Frank
Zupanick Joseph A.
Bagnell David
CDX Gas, LLC
Fish & Richardson P.C.
Gay Jennifer
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