Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2007-09-04
2007-09-04
Gulakowski, Randy (Department: 1712)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S260000, C507S269000, C507S276000, C166S282000, C166S295000, C166S300000, C166S304000, C166S305100
Reexamination Certificate
active
10605687
ABSTRACT:
A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and particulate solid acid-reactive materials, such as magnesium oxide or calcium carbonate. In the presence of water, the solid acid-precursors hydrolyze and dissolve, generating acids that then dissolve the solid acid-reactive materials. The composition is used in oilfield treatments such as drilling, completion and stimulation where it disappears when it is no longer needed without the use of mechanical means or injection of additional fluids.
REFERENCES:
patent: 4585482 (1986-04-01), Tice et al.
patent: 4848467 (1989-07-01), Cantu
patent: 4957165 (1990-09-01), Cantu
patent: 4961466 (1990-10-01), Himes
patent: 4986354 (1991-01-01), Cantu et al.
patent: 4986355 (1991-01-01), Casad
patent: 5325921 (1994-07-01), Johnson et al.
patent: 5439057 (1995-08-01), Weaver et al.
patent: 5680900 (1997-10-01), Nguyen et al.
patent: 6394185 (2002-05-01), Constien
patent: 6432885 (2002-08-01), Vollmer
patent: 6599863 (2003-07-01), Palmer
patent: 6817414 (2004-11-01), Lee
patent: 2002/0142919 (2002-10-01), Constien
patent: 0 404 489 (1995-03-01), None
http://chemfinder.cambridgesoft.com/result.asp for sodium chlorite, accessed Oct. 24, 2006.
Dismuke Keith
Willberg Dean
Cate Dave
Gulakowski Randy
Kugel Timothy J.
Mitchell Thomas O.
Nava Robin
LandOfFree
Self-destructing filter cake does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-destructing filter cake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-destructing filter cake will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3732454