Wells – Processes – Cleaning or unloading well
Reexamination Certificate
2007-04-02
2010-11-23
Stephenson, Daniel P (Department: 3676)
Wells
Processes
Cleaning or unloading well
C166S107000
Reexamination Certificate
active
07836955
ABSTRACT:
An electrical wireline conveyed baling system for removing large volumes of liquids from a well borehole with a single trip of a bailer tool string. The system also utilizes one or more blow out preventers thereby allowing wireline bailing operations to be carried out while controlling well pressure. A bailer tool string that is conveyed by the wireline comprises a tool head containing a pump, at least one carrier section, and a no-return valve. Once deployed in the borehole, a first signal transmitted via the wireline from the surface activates the pump thereby reducing pressure within the carrier section. A second signal transmitted via the wireline from the surface opens the no-return valve thereby allowing liquid to flow from the borehole into the carrier section. The bailer tool string containing liquid is subsequently retrieved via the wireline thereby removing liquid from the borehole. A plurality of carrier sections can be axially stacked and deployed thereby increasing liquid bailing capacity while still maintaining well pressure control.
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Examination Report dated Jul. 22, 2009 from Intellectual Property Office, UK Patent Application No. GB0804324.2; 1 Page.
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Michener Blake
Precision Energy Services, Inc.
Stephenson Daniel P
Wong, Cabello, Lutsch, Rutherford & Brucculeri,LLP
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