Enzyme complex used for breaking crosslinked cellulose based blo

Details Enzyme complex used for breaking crosslinked cellulose based blo Enzyme complex used for breaking crosslinked cellulose based blo

1992-02-26

1993-07-06

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166294, 166300, E21B 33138

Patent

active

052245446

ABSTRACT:
A method of degrading a blocking gel in a subterranean formation of a well bore is shown in which a gellable blocking fluid is first formed by blending together an aqueous fluid, a hydratable polymer, a suitable crosslinking agent for crosslinking the hydratable polymer to form a polymer gel. The polymer gel may contain an enzyme breaker incorporated within. The cross-linked polymer gel is pumped into the well bore. If required, an externally applied enzyme breaker is added prior to gel degradation. The enzyme breaker is allowed to degrade the cross-linked polymer with time to reduce the viscosity of the fluid so that the fluid can be removed from the formation back to the well surface. The particular enzyme breaker utilized has an activity in the pH range from about 1.0 to 8.0 and is effective to attack only specific linkages in the cross-linked polymer gel.

REFERENCES:
patent: 2681704 (1954-06-01), Menaul
patent: 2801218 (1957-07-01), Menaul
patent: 3684710 (1972-08-01), Cayle et al.
patent: 4157116 (1979-06-01), Coulter
patent: 4342866 (1982-08-01), Kang et al.
patent: 4665985 (1987-05-01), Berrod et al.
patent: 4713449 (1987-12-01), Vanderslice et al.
patent: 4928763 (1990-05-01), Falk
patent: 5032297 (1991-07-01), Williamson et al.
patent: 5067566 (1991-11-01), Dawson

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