WO/2004/101951 is referenced by 89 patents.

A self-adaptive cement system includes cement, water and at least one additive that reacts or and expands in contact with oil and gas. Several chemical products have been identified including rubber alkylstyrene, polynorbornene, resins such precrosslinked substituted vinyl acrylate copolymers and diatomaceous earth. These additives have the effect of making the cement self-healing in the event of physical failure or damage such as micro-annuli. The self healing property is produced by the contact with subterranean hydrocarbon fluids, the potential repair mechanism is thus activated if and when needed in case of start of loss of zonal isolation. In another embodiment, the expansion is deliberately induced by pumping a hydrocarbon fluid in the vicinity of the set cement.

Title
Self adaptive cement systems
Application Number
PCT/EP2004/005478
Publication Number
2004/101951
Application Date
May 14, 2004
Publication Date
November 25, 2004
Inventor
Nelson Erik
Dismuke Keith
Guillot Dominique
Roy Delage Sylvaine
Le
Agent
MENES Catherine
Assignee
Nelson Erik
Dismuke Keith
Guillot Dominique
Roy Delage Sylvaine
Le
Sofitech
Schlumberger Canada
Schlumberger Holdings
Schlumberger Technology
Services Petroliers Schlumberger
IPC
C09K 08/467
C04B 40/06
C04B 28/02
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