WO/2004/037946 is referenced by 90 patents.

A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and particulate solid acid-reactive materials, such as magnesium oxide or calcium carbonate. In the presence of water, the solid acid-precursors hydrolyze and dissolve, generating acids that then dissolve the solid acid-reactive materials. The composition is used in oilfield treatments such as drilling, completion and stimulation where it disappears when it is no longer needed without the use of mechanical means or injection of additional fluids.

Self-destructing filter cake
Application Number
Publication Number
Application Date
October 17, 2003
Publication Date
May 6, 2004
Dismuke Keith
Willberg Dean
MENES Catherine
Schlumberger Technology
Schlumberger Holdings
Services Petroliers Schlumberger
Schlumberger Canada
C09K 08/74
C09K 08/72
C09K 08/506
C09K 08/504
C09K 08/06
C09K 08/03
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