Baffle system for two-phase annular flow

Details Baffle system for two-phase annular flow Baffle system for two-phase annular flow

2005-11-01

2005-11-01

Neuder, William (Department: 3672)

Wells

Processes

Separating material entering well

C166S105500, C166S372000

Reexamination Certificate

active

06959764

ABSTRACT:
An apparatus for promoting the flow of methane gas from a coal bed methane well. The apparatus may include a well casing extending into the earth to a cool seam aquifer. A conduit may be placed within the well and extend from the coal seam aquifer to the earth's surface. A pump may be connected to pump water from the coal seam aquifer through the conduit to the surface. A baffle may be placed in the gap formed between the interior surface of the well casing and the exterior surface of the conduit to the preferentially permit the flow of gas over the flow of water therethrough. The baffle may mitigate well bore pressure fluctuations, thus reducing the occurrence of pump gas lock and reducing well bore damage.

REFERENCES:
patent: 6382321 (2002-05-01), Bates et al.
patent: 6533033 (2003-03-01), Skillman
patent: 6755250 (2004-06-01), Hall et al.
patent: 2003/0047310 (2003-03-01), Thomas et al.
Oil Well Diagnosis by Sensing Terminal Characteristics of the Induction Motor, IEEE Transactions on Industrial Electronics, vol. 47, No. 5, Oct. 2000, pp. 1100-1107.
Black Diamond Energy Coalbed Methane, http://www.blackdiamondenergy.com/coalbed.html, May 14, 2003, pp. 1-4.

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