Wells – Processes – Cyclic injection then production of a single well
Reexamination Certificate
2006-12-19
2006-12-19
Suchfield, George (Department: 3676)
Wells
Processes
Cyclic injection then production of a single well
C166S270000, C166S295000, C166S300000, C507S226000, C507S229000, C507S271000, C526S278000, C526S287000, C523S130000
Reexamination Certificate
active
07150319
ABSTRACT:
A method for reducing or completely eliminating water influx in an oil or natural gas borehole includes introducing in the borehole an aqueous solution of a copolymer comprising: A) 40–98 wt. % of structural units of formula (I), wherein: R1is hydrogen or methyl; R2represents C2–C10alkylene; and Me+represents an ammonium metal ion and an alkali metal ion; B) 0.1 to 58 wt. % of structural units of formula (II); C) 0.1 to 10 wt. % of structural units of formula (III), wherein: R3and R4independently of each other represent hydrogen, methyl or ethyl, or R3and R4represent together a propylene group, which, with inclusion of a radical (A), form a pyrrolidon radical or, with inclusion of a pentamethylene group, forms a caprolactam radical; D) 0.10 to 10 wt % of structural units of formula (IV). The method also includes introducing in the ground or deposit, simultaneously with the copolymer or subsequently, an agent for crosslinking the copolymer.
REFERENCES:
patent: 3308885 (1967-03-01), Sandiford
patent: 4095651 (1978-06-01), Chaveteau et al.
patent: 4718491 (1988-01-01), Kholer et al.
patent: 4842071 (1989-06-01), Zaitoun et al.
patent: 5079278 (1992-01-01), Mitchell
patent: 5244988 (1993-09-01), Hughes et al.
patent: 5318719 (1994-06-01), Hughes et al.
patent: 5379841 (1995-01-01), Pusch et al.
patent: 6033524 (2000-03-01), Pruszynski et al.
patent: 6395853 (2002-05-01), Oswald et al.
patent: 6451756 (2002-09-01), Shulman et al.
patent: 6465397 (2002-10-01), Patterson
patent: 7056868 (2006-06-01), Benton et al.
patent: 2003/0109385 (2003-06-01), Gunn et al.
patent: 2004/0177957 (2004-09-01), Kalfayan et al.
patent: 1 301 566 (1969-08-01), None
patent: 0 577 931 (1998-06-01), None
patent: 1 059 316 (2000-12-01), None
patent: 1147852 (1969-04-01), None
patent: WO 01/49971 (2001-07-01), None
patent: WO 01/59254 (2001-08-01), None
Gunn Alistair M.
Heier Karl Heinz
Kayser Christoph
Morgan James C
Morschhaeuser Roman
Clariant UK Ltd.
Silverman Richard P.
Suchfield George
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