Boring or penetrating the earth – Processes – Boring with specific fluid
Reexamination Certificate
2007-10-16
2007-10-16
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
Processes
Boring with specific fluid
C175S212000, C175S218000, C166S090100, C166S075120
Reexamination Certificate
active
11081605
ABSTRACT:
A method for the circulation of gas when drilling or working a well. The method includes the step of pressurizing at least two chambers of a multi-chambered accumulator with inert gas. The chambers of the multi-chambered accumulator are operatively connected to one another and individually or in combination isolatable from each other. The method also includes isolating at least one chamber of the accumulator that has been pressurized with inert gas such that during drilling or working the well the isolated chamber remains pressurized with gas that has not been mixed with well gas returns. Pressurized gas is extracted from one or more of the non-isolated chambers of the accumulator and injected into the well. At least a portion of the gas returns from the well is collected, compressed and delivered to at least one of the non-isolated chambers of the multi-chamber accumulator.
REFERENCES:
patent: 5775442 (1998-07-01), Speed
patent: 6206113 (2001-03-01), Michael
Krill Ross Michael
McAlary Richard Allan
Steiner Adrian
Collins Giovanna M
Merek Blackman & Voorhees, LLC
Precision Energy Services, Ltd.
Thompson Kenneth
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