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1. (WO2001034939) METHOD AND COMPOSITION FOR THE TRIGGERED RELEASE OF POLYMER-DEGRADING AGENTS FOR OIL FIELD USE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/034939 International Application No.: PCT/US2000/031106
Publication Date: 17.05.2001 International Filing Date: 13.11.2000
Chapter 2 Demand Filed: 11.06.2001
IPC:
C09K 8/536 (2006.01) ,C09K 8/66 (2006.01) ,C09K 8/92 (2006.01)
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8
Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
52
Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
536
characterised by their form or by the form of their components, e.g. encapsulated material
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8
Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60
Compositions for stimulating production by acting on the underground formation
62
Compositions for forming crevices or fractures
66
Compositions based on water or polar solvents
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8
Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
60
Compositions for stimulating production by acting on the underground formation
92
characterised by their form or by the form of their components, e.g. encapsulated material
Applicants: M-I L.L.C.[US/US]; 5950 North Course Drive Houston, TX 77072, US
Inventors: FREEMAN, Michael, A.; US
JIANG, Ping; NO
NORMAN, Monica; US
SYMES, Kenneth, C.; GB
MISTRY, Kishor, K.; GB
BALLARD, David, A.; GB
Agent: PAYNE, Leslie, V. ; Conley, Rose & Tayon, P.C. P.O. Box 3267 Houston, TX 77253-3267, US
FLINT, Adam; W.H. Beck, Greener & Co. 7 Stone Buildings Lincoln's Inn London WC2A 3SZ, GB
Priority Data:
60/165,39312.11.1999US
Title (EN) METHOD AND COMPOSITION FOR THE TRIGGERED RELEASE OF POLYMER-DEGRADING AGENTS FOR OIL FIELD USE
(FR) PROCEDE ET COMPOSITION PERMETTANT DE DECLENCHER LA LIBERATION D'AGENTS DE DEGRADATION DE POLYMERE UTILISES DANS LE DOMAINE DU PETROLE
Abstract:
(EN) Disclosed are methods and related compositions for altering the physical and chemical properties of a substrate used in hydrocarbon exploitation, such as in downhole drilling operations. In a preferred embodiment a method involves formulating a fluid, tailored to the specific drilling conditions, that contains one or more inactivated enzymes. Preferably the enzyme is inactivated by encapsulation in a pH responsive material. After the fluid has been introduced into the well bore, one or more triggering signals, such as a change in pH, is applied to the fluid that will activate or reactivate the inactivate enzyme, preferably by causing it to be released by the encapsulation material. The reactivated enzyme is capable of selectively acting upon a substrate located downhole to bring about the desired change in the chemical or physical properties of the substrate.
(FR) L'invention concerne un procédé et une composition permettant de modifier les propriétés physiques et chimiques d'un substrat utilisé dans l'exploitation des hydrocarbures, notamment des opérations de forage de fonds de puits. Selon un mode de réalisation préféré, le procédé consiste à préparer un fluide adapté aux conditions spécifiques de forage contenant au moins une enzyme inactivée. Cette enzyme est, de préférence, inactivée par encapsulation dans un matériau sensible au pH. Une fois que le fluide a été introduit dans le puits de forage, au moins un signal de déclenchement, tel qu'une modification du pH, est appliqué audit fluide qui active ou réactive l'enzyme inactivée, de préférence par libération de l'enzyme du matériau d'encapsulation. L'enzyme réactivée peut agir sélectivement sur un substrat situé en fonds de trou afin d'entraîner la modification désirée des propriétés physiques ou chimiques dudit substrat.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)