Title:
TIME-DELAY FLUIDS FOR WELLBORE CLEANUP
Document Type and Number:
WIPO Patent Application WO/2012/173860
Kind Code:
A3
Abstract:
A method for delaying the removal of a majority of an oil-based mud (OBM) filter cake from a hydrocarbon reservoir wellbore that utilizes a multiple phase composition is described. The use of the multiple phase composition allows for a microemulsion, a miniemulsion, or a nanoemulsion to form in situ downhole at a controllable time. The method includes pumping the multiple phase composition comprising an additive into the wellbore. The multiple phase composition may be broken thereby releasing the additive. The broken multiple phase composition and the additive may contact the OBM filter cake particles to form an in situ emulsion selected from the group consisting of a nanoemulsion, a miniemulsion, a microemulsion, a multiple emulsion, a water- continuous emulsion and mixtures thereof. The in situ emulsion may incorporate more of the external oil from the OBM filter cake in order to more easily remove the OBM filter cake.
More Like This:
| WO/2002/035017 | WELL CLEANING APPARATUS AND METHOD |
| WO/2017/070502 | WELLBORE CENTRALIZER |
| WO/2020/252597 | WELLBORE MILLING AND CLEANOUT SYSTEM AND METHODS OF USE |
Inventors:
QUINTERO LIRIO (US)
Application Number:
PCT/US2012/041303
Publication Date:
May 16, 2013
Filing Date:
June 07, 2012
Export Citation:
Assignee:
BAKER HUGHES INC (US)
QUINTERO LIRIO (US)
QUINTERO LIRIO (US)
International Classes:
E21B37/00; E21B43/22
Foreign References:
| US20080110618A1 | 2008-05-15 | |||
| US20090114394A1 | 2009-05-07 | |||
| US20060073986A1 | 2006-04-06 | |||
| US7222672B2 | 2007-05-29 |
Other References:
See also references of EP 2721251A4
Attorney, Agent or Firm:
LITTLEFIELD, Stephen, A. (P.O. Box 4740Houston, TX, US)
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