Fluid loss control and well cleanup methods

Details Fluid loss control and well cleanup methods Fluid loss control and well cleanup methods

2011-08-16

2011-08-16

Cano, Milton I (Department: 1763)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S103000, C507S200000, C166S305100, C166S311000

Reexamination Certificate

active

07998908

ABSTRACT:
A method for removing preexisting filtercake from a portion of a subterranean formation penetrated by a wellbore is carried out by providing water-degradable particles formed from a solid polymeric acid precursor material that is capable of a degrading to acid for reacting with materials of the filtercake. A slurry is formed from the particles with a carrier fluid. The slurry of particles is introduced into the formation through the wellbore and allowed to degrade to form acid, whereby the formed acid facilitates decomposition of preexisting filtercake material. In certain applications, the water-degradable particles may also be used in combination with non-water-degradable particles, which may be used for forming a gravel pack. The water-degradable particles may also be used to reduce fluid loss temporarily to areas of the formation immediately surrounding the wellbore.

REFERENCES:
patent: 4848467 (1989-07-01), Cantu
patent: 4957165 (1990-09-01), Cantu
patent: 4986355 (1991-01-01), Casad
patent: 5165477 (1992-11-01), Shell
patent: 5247995 (1993-09-01), Tjon Joe Pin
patent: 5566759 (1996-10-01), Tjon Joe Pin
patent: 5678632 (1997-10-01), Moses
patent: 5881813 (1999-03-01), Brannon
patent: 6110875 (2000-08-01), Tjon Joe Pin
patent: 6140277 (2000-10-01), Tibbles
patent: 6263967 (2001-07-01), Morris
patent: 6534449 (2003-03-01), Gilmour
patent: 6569814 (2003-05-01), Brady
patent: 6631764 (2003-10-01), Parlar
patent: 6638896 (2003-10-01), Tibbles
patent: 6763888 (2004-07-01), Harris
patent: 6831044 (2004-12-01), Constien
patent: 6883608 (2005-04-01), Parlar
patent: 6978838 (2005-12-01), Parlar
patent: 7166560 (2007-01-01), Still
patent: 7216705 (2007-05-01), Saini et al.
patent: 7276466 (2007-10-01), Todd
patent: 7553800 (2009-06-01), Munoz, Jr.
patent: 2004/0106525 (2004-06-01), Willberg et al.
patent: 2005/0034865 (2005-02-01), Todd
patent: 2005/0056423 (2005-03-01), Todd
patent: 2005/0139354 (2005-06-01), Salamat
patent: 2005/0252659 (2005-11-01), Sullivan et al.
patent: 2006/0157248 (2006-07-01), Hoefer
patent: 2004007905 (2004-01-01), None
patent: 2005095755 (2005-10-01), None

Affiliated with

Also associated with

Rating

Fluid loss control and well cleanup methods does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluid loss control and well cleanup methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid loss control and well cleanup methods will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2774558