EP 2035525 A1 20090318 - THE USE OF DICARBONYL COMPOUNDS TO INCREASE THE TEMPERATURE STABILITY OF BIOPOLYMERS DURING CRUDE OIL AND NATURAL GAS EXPLORATION
Title (en)
THE USE OF DICARBONYL COMPOUNDS TO INCREASE THE TEMPERATURE STABILITY OF BIOPOLYMERS DURING CRUDE OIL AND NATURAL GAS EXPLORATION
Title (de)
VERWENDUNG VON DICARBONYL-VERBINDUNGEN ZUR ERHÖHUNG DER TEMPERATURSTABILITÄT VON BIOPOLYMEREN BEI DER ERDÖL- UND ERDGASEXPLORATION
Title (fr)
UTILISATION DE COMPOSÉS DICARBONYLE POUR AUGMENTER LA STABILITÉ À LA TEMPÉRATURE DES BIOPOLYMÈRES DANS L'EXPLORATION DE PÉTROLE BRUT ET DE GAZ NATUREL
Publication
Application
Priority
- EP 2007005614 W 20070625
- DE 102006029265 A 20060626
Abstract (en)
[origin: US2007287638A1] The use of dicarbonyl compounds for increasing the thermal stability of biopolymers in aqueous liquid phases in petroleum and natural gas exploration is claimed. The biopolymer component preferably comprises polysaccharides prepared by fermentation, such as, for example, scleroglucan or welan gum. The aqueous liquid phase is typically a drilling fluid which may also contain high salt concentrations ("brines"). Glyoxal may be mentioned as a particularly suitable member of the dicarbonyls. It can either be admixed with the liquid phase or preferably also be incorporated in the course of the preparation of the biopolymer. The use according to the invention shows their advantages, particularly at temperatures in the rock formation which are above 250° Fahrenheit.
IPC 8 full level
C09K 8/08 (2006.01); C09K 8/40 (2006.01); C09K 8/60 (2006.01)
CPC (source: EP US)
C09K 8/08 (2013.01 - EP US); C09K 8/40 (2013.01 - EP US); C09K 8/905 (2013.01 - EP US)
Citation (search report)
See references of WO 2008000427A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DE 102006029265 A1 20080103; CA 2655837 A1 20080103; EP 2035525 A1 20090318; MX 2009000251 A 20090123; NO 20090076 L 20090312; US 2007287638 A1 20071213; WO 2008000427 A1 20080103
DOCDB simple family (application)
DE 102006029265 A 20060626; CA 2655837 A 20070625; EP 07764842 A 20070625; EP 2007005614 W 20070625; MX 2009000251 A 20070625; NO 20090076 A 20090106; US 59065906 A 20061030