04506734 is referenced by 192 patents and cites 4 patents.

Disclosed are compositions and related methods of use for reducing the viscosity of a fluid introduced into a subterranean formation. The compositions are introduced into the subterranean formation and are non-reactive to the fluid until activated by the closing of any fractures in the subterranean formation upon the compositions. The compositions are comprised of a viscosity reducing chemical, such as an enzyme, oxidizing agent, acid, catalyst, or mixtures thereof, encapsulated in dry or liquid form within hollow or porous, crushable beads. The beads can be formed from glass, ceramics, plastics, gels, or mixtures thereof.

Title
Fracturing fluid breaker system which is activated by fracture closure
Application Number
6/530174
Publication Number
4506734
Application Date
September 7, 1983
Publication Date
March 26, 1985
Inventor
Kenneth G Nolte
Tulsa
OK, US
Agent
Fred E Hook
Scott H Brown
Assignee
The Standard Oil Company
IL, US
IPC
E21B 43/26
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