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1. WO1997026310 - VISCOSIFICATION OF HIGH DENSITY BRINES

Publication Number WO/1997/026310
Publication Date 24.07.1997
International Application No. PCT/US1997/000819
International Filing Date 17.01.1997
Chapter 2 Demand Filed 25.07.1997
IPC
C09K 8/08 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
02Well-drilling compositions
04Aqueous well-drilling compositions
06Clay-free compositions
08containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
C09K 8/12 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
02Well-drilling compositions
04Aqueous well-drilling compositions
06Clay-free compositions
12containing synthetic organic macromolecular compounds or their precursors
CPC
C09K 3/00
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
3Materials not provided for elsewhere
C09K 8/08
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
02Well-drilling compositions
04Aqueous well-drilling compositions
06Clay-free compositions
08containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
C09K 8/12
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
02Well-drilling compositions
04Aqueous well-drilling compositions
06Clay-free compositions
12containing synthetic organic macromolecular compounds or their precursors
Applicants
  • GREAT LAKES CHEMICAL CORPORATION [US]/[US]
Inventors
  • VOLLMER, Daniel, P.
  • JAVORA, Paul, H.
  • HORTON, Robert, L.
Agents
  • HENRY, Thomas, Q.
Priority Data
60/010,09517.01.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) VISCOSIFICATION OF HIGH DENSITY BRINES
(FR) AMELIORATION DE LA VISCOSITE DES SAUMURES DE HAUTE DENSITE
Abstract
(EN)
The present invention provides compositions useful for viscosifying aqueous fluids, methods for making them and methods for using them. In one aspect of the invention, inventive compositions comprise a prehydrating alcohol having at least two hydroxyl groups and having a molecular weight of from about 60 to about 600; an inorganic salt; and a polymer. In a preferred aspect of the invention, the viscosifier composition additionally comprises a solvent having a molecular weight of from about 75 to about 1000. According to another aspect of the invention, inventive compositions comprise a prehydrating alcohol; an inorganic salt; and a polymer; and the composition is essentially free from water. Inventive compositions find advantageous use in viscosifying fluids utilized in subterranean drilling activities such as, for example, drilling, drill-in, completion, hydraulic fracturing, work-over, packer, well treating, testing, spacer, or hole abandonment fluids.
(FR)
La présente invention se rapporte à des compositions utilisées pour améliorer la viscosité des fluides aqueux, à leurs procédés de fabrication et d'utilisation. Selon un aspect de l'invention, ces compositions comprennent un alcool préhydratant possédant au moins deux groupes hydroxyle et ayant un poids moléculaire compris entre environ 60 et environ 600; un sel inorganique; et un polymère. Selon un aspect préféré de cette invention, la composition contenant un améliorant de viscosité comprend de plus un solvant ayant un poids moléculaire compris entre environ 75 et environ 1000. Selon un autre aspect de l'invention, ces compositions comprennent un alcool préhydratant; un sel inorganique et un polymère, la composition étant principalement exempte d'eau. Ces compositions s'avèrent être avantageusement utiles dans des fluides améliorant la viscosité utilisés dans les opérations d'exploitations pétrolifères telles que le forage, le sondage, la complétion, la fracturation hydraulique, le reconditionnement, le packer, le traitement de puits, les essais de production, les pièces d'écartement ou les fluides d'abandon de puits.
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