EP 1891177 A2 20080227 - COMPOSITIONS AND METHODS OF USING A POLYMERIC PRECIPITATE TO REDUCE THE LOSS OF FLUID TO A SUBTERRANEAN FORMATION
Title (en)
COMPOSITIONS AND METHODS OF USING A POLYMERIC PRECIPITATE TO REDUCE THE LOSS OF FLUID TO A SUBTERRANEAN FORMATION
Title (de)
ZUSAMMENSETZUNGEN UND VERFAHREN ZUR VERWENDUNG EINES POLYMEREN PRÄZIPITATS ZUR FLUID-LOSS-VERMINDERUNG AN EINE UNTERIRDISCHE FORMATION
Title (fr)
COMPOSITIONS ET PROCEDES D'UTILISATION D'UN PRECIPITE POLYMERE PERMETTANT DE REDUIRE LA PERTE DE FLUIDE DANS UNE FORMATION SOUTERRAINE
Publication
Application
Priority
- GB 2006001244 W 20060405
- US 10915005 A 20050419
- US 10935405 A 20050419
Abstract (en)
[origin: WO2006111708A1] Methods are provided for reducing the loss of a wellbore servicing fluid to a subterranean formation. A polymeric solution and an activator may be contacted in the formation, thereby forming a precipitate to at least partially block fluid from flowing further into the formation. The fluid may be, for example, a drilling fluid, a cement composition, a workover fluid, or combinations thereof. The polymeric solution may comprise a polyvinylpyrrolidone aqueous solution, and the activator may comprise a formate brine. In one embodiment, the polymeric solution and the activator are contacted before completing a drilling operation in the wellbore. In another embodiment, they are contacted before completing a primary cementing operation in the wellbore. In yet another embodiment, they are contacted before completing a secondary cementing operation in the wellbore. When desirable, the precipitate may be easily and quickly removed from the subterranean formation by dissolving it in fresh water.
IPC 8 full level
C09J 1/00 (2006.01)
CPC (source: EP)
C04B 24/2652 (2013.01); C04B 28/02 (2013.01); C09K 8/24 (2013.01); C09K 8/426 (2013.01); C09K 8/487 (2013.01); C09K 8/508 (2013.01)
Citation (search report)
See references of WO 2006111703A2
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
WO 2006111708 A1 20061026; EP 1891177 A2 20080227; NO 20075890 L 20080116; WO 2006111703 A2 20061026; WO 2006111703 A3 20070329
DOCDB simple family (application)
GB 2006001286 W 20060410; EP 06726648 A 20060405; GB 2006001244 W 20060405; NO 20075890 A 20071116