Methods of perforation using viscoelastic surfactant fluids...

Wells – Processes – Perforating – weakening – bending or separating pipe at an...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C166S305100, C166S312000

Reexamination Certificate

active

07878246

ABSTRACT:
The invention provides a method for perforating a well with a perforating fluid comprising a viscoelastic surfactant that essentially stops fluid leak-off after perforation in an overbalanced condition. Another aspect of the invention provides the perforating fluid in itself. The well has a wellbore defined by a generally cylindrical casing in at least a portion of the wellbore (i.e., the wellbore is cased, although it is not necessary cased in its entire length). The wellbore passes through a subterranean formation that comprises hydrocarbon formation fluids (such as oil and/or gas), at least in certain strata. The method comprises placing a perforating device in a wellbore which includes at least one explosive perforating charge that can be detonated in order to perforate the casing and allow the formation fluids to enter the wellbore. The casing is located between the subterranean formation and the perforating device. A perforating fluid including at least one viscoelastic surfactant is placed in the wellbore between the perforating device and the casing, in at least a portion of the wellbore. In other words, the perforating fluid is present in the wellbore adjacent to the perforating device. The explosive charge(s) in the perforating device is detonated, such that the perforating device forms at least one perforation in the casing that permits the flow of hydrocarbon formation fluids from the subterranean formation into the wellbore. As a result of the detonation, at least a portion of the perforating fluid is put in communication with the subterranean formation.

REFERENCES:
patent: 4439333 (1984-03-01), House et al.
patent: 4501330 (1985-02-01), Garcia
patent: 4662448 (1987-05-01), Ashford et al.
patent: 5329998 (1994-07-01), King et al.
patent: 5392855 (1995-02-01), Bernardi, Jr. et al.
patent: 5421411 (1995-06-01), Sydansk
patent: 5547025 (1996-08-01), Ahmed et al.
patent: 5582250 (1996-12-01), Constien
patent: 5981447 (1999-11-01), Chang et al.
patent: 6140277 (2000-10-01), Tibbles et al.
patent: 6325149 (2001-12-01), Dobson, Jr. et al.
patent: 6342467 (2002-01-01), Chang et al.
patent: 6387986 (2002-05-01), Moradi-Araghi et al.
patent: 6399546 (2002-06-01), Chang et al.
patent: 6450260 (2002-09-01), James et al.
patent: 6489270 (2002-12-01), Vollmer et al.
patent: 7036594 (2006-05-01), Walton et al.
patent: 7148185 (2006-12-01), Fu et al.
patent: 7182138 (2007-02-01), Behrmann et al.
patent: 7261159 (2007-08-01), Kneisl
patent: 7291651 (2007-11-01), Chen et al.
patent: 2003/0236174 (2003-12-01), Fu et al.
patent: 2004/0099418 (2004-05-01), Behrmann et al.
patent: 2006/0000609 (2006-01-01), Cavazzoli et al.
patent: 2006/0278392 (2006-12-01), Kneisl
patent: 1128021 (2007-04-01), None
patent: 2352259 (2001-01-01), None
patent: 2408057 (2005-05-01), None
patent: 9524452 (1995-09-01), None
patent: 2005100503 (2005-10-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Methods of perforation using viscoelastic surfactant fluids... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of perforation using viscoelastic surfactant fluids..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of perforation using viscoelastic surfactant fluids... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2648392

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.