Thomas Aubrey Bell Jr.
Engineering at Digby Ave, Lafayette, LA
License number
Louisiana PE.0026130
Issued Date
Feb 7, 1995
Expiration Date
Sep 30, 2004
Category
Civil Engineer
Type
Petroleum Engineer
Address
Address
411 Digby Ave, Lafayette, LA 70508
Professional information
Liquid Carbon Dioxide Cleaning Of Wellbores And Near-Wellbore Areas
US Patent:
2004025, Dec 23, 2004
Filed:
Jun 19, 2003
Appl. No.:
10/465371
Inventors:
Dennis Wilson - Katy TX, US
Thomas Bell - Lafayette LA, US
Thomas Bell - Lafayette LA, US
Assignee:
CONOCOPHILLIPS COMPANY
International Classification:
E21B036/00, E21B037/00, E21B043/25
US Classification:
166/302000, 166/304000, 166/312000, 507/269000, 507/927000, 166/305100
Abstract:
A method to clean the wellbore and the near wellbore formation adjacent to the wellbore of the gas bearing formation adjacent to the production zone of the wellbore. The method includes the steps of injecting a treatment liquid containing from 84.5 to 100% of liquid carbon dioxide, 0 to 15% of an alcohol, and 0 to 0.5% of a surfactant into the well in a predetermined quantity and maintaining the pressure of the treatment liquid in the near wellbore formation of the gas bearing formation below the fracturing pressure of the formation, releasing the pressure on the wellbore and allowing the liquid COto vaporize and other materials to blow out of the well.