EP 1694797 A1 20060830 - WATER-BASED DRILLING FLUIDS USING LATEX ADDITIVES
Title (en)
WATER-BASED DRILLING FLUIDS USING LATEX ADDITIVES
Title (de)
WASSERBASIERTE BOHRSPÜLUNGEN MIT LATEXADDITIVEN
Title (fr)
FLUIDES DE FORAGE A BASE D'EAU FAISANT APPEL A DES ADDITIFS DE LATEX
Publication
Application
Priority
- US 2004024804 W 20040802
- US 49168503 P 20030731
- US 63433403 A 20030804
Abstract (en)
[origin: WO2005012456A1] A water-based drilling fluid having a polymer latex capable of providing a deformable latex film on at least a portion of a subterranean formation has been discovered to provide reduced drilling fluid pressure invasion when used to drill in shale formations for hydrocarbon recovery operations. A precipitating agent such as a silicate or an aluminum complex (e.g. sodium aluminate) is preferably used in conjunction with the polymer. Typically, the water present contains a salt to form a brine, often to saturation, although the invention may be practiced with fresh water. If a salt is employed, it is often helpful to additionally employ a surfactant, such as a betaine, for example.
IPC 8 full level
C09K 8/12 (2006.01); C09K 8/035 (2006.01); C09K 8/24 (2006.01)
CPC (source: EP NO)
C09K 8/12 (2013.01 - EP NO); C09K 8/24 (2013.01 - EP NO); C09K 8/508 (2013.01 - EP NO)
Citation (search report)
See references of WO 2005012456A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005012456 A1 20050210; WO 2005012456 B1 20050519; AU 2004262024 A1 20050210; AU 2004262024 B2 20100812; BR PI0413078 A 20061003; CA 2534080 A1 20050210; CA 2534080 C 20110712; EP 1694797 A1 20060830; NO 20060217 L 20060116; NO 344585 B1 20200203
DOCDB simple family (application)
US 2004024804 W 20040802; AU 2004262024 A 20040802; BR PI0413078 A 20040802; CA 2534080 A 20040802; EP 04779758 A 20040802; NO 20060217 A 20060116