EP 2959092 A1 20151230 - METHOD OF ENHANCING DRILLING FLUID PERFORMANCE
Title (en)
METHOD OF ENHANCING DRILLING FLUID PERFORMANCE
Title (de)
VERFAHREN ZUR VERBESSERUNG DER BOHRFLÜSSIGKEITSLEISTUNG
Title (fr)
PROCÉDÉ POUR AMÉLIORER L'EFFICACITÉ D'UN FLUIDE DE FORAGE
Publication
Application
Priority
- US 201313773199 A 20130221
- US 2014016060 W 20140212
Abstract (en)
[origin: US2014231146A1] The present invention relates to methods of drilling a wellbore wherein a drill-in fluid is foamed at the drill tool. A method in accordance with the present invention comprises providing a drill-in fluid comprising an aqueous fluid, a foaming agent, a foam stabilizer, a gas generating chemical and an encapsulated activator; introducing the drill-in fluid downhole into a drill string connected to a drill tool; and allowing the drill-in fluid to exit the drill tool where, upon exiting the drill tool, the encapsulated activator is de-capsulated sufficiently to react with the gas generating chemical such that a gas is generated within the drill-in fluid and thus foams the drill-in fluid.
IPC 8 full level
C09K 8/38 (2006.01); C09K 8/518 (2006.01); C09K 8/94 (2006.01); E21B 21/01 (2006.01); E21B 21/08 (2006.01)
CPC (source: EP US)
C09K 8/38 (2013.01 - EP US); C09K 8/518 (2013.01 - EP US); C09K 8/94 (2013.01 - EP US); E21B 21/06 (2013.01 - EP US); E21B 21/14 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
US 2014231146 A1 20140821; AR 094871 A1 20150902; AU 2014219296 A1 20150709; BR 112015016645 A2 20170711; CA 2898728 A1 20140828; CA 2898728 C 20171017; EP 2959092 A1 20151230; EP 2959092 A4 20161026; MX 2015009249 A 20151015; WO 2014130323 A1 20140828
DOCDB simple family (application)
US 201313773199 A 20130221; AR P140100575 A 20140224; AU 2014219296 A 20140212; BR 112015016645 A 20140212; CA 2898728 A 20140212; EP 14754602 A 20140212; MX 2015009249 A 20140212; US 2014016060 W 20140212