EP 2564016 A1 20130306 - WELLBORE PRESSURE CONTROL WITH SEGREGATED FLUID COLUMNS
Title (en)
WELLBORE PRESSURE CONTROL WITH SEGREGATED FLUID COLUMNS
Title (de)
BOHRLOCHDRUCKREGELUNG MIT SEGREGIERTEN FLUIDSÄULEN
Title (fr)
RÉGULATION DE LA PRESSION DANS UN PUITS DE FORAGE AVEC COLONNES DE FLUIDE SÉPARÉES
Publication
Application
Priority
US 2010032578 W 20100427
Abstract (en)
[origin: WO2011136761A1] A method of controlling pressure in a wellbore can include placing a barrier substance in the wellbore while a fluid is present in the wellbore, and flowing another fluid into the wellbore while the first fluid and the barrier substance are in the wellbore. The first and second fluids may have different densities. Another method can include circulating a fluid through a tubular string and an annulus formed between the tubular string and the wellbore, then partially withdrawing the tubular string from the wellbore, then placing a barrier substance in the wellbore, then partially withdrawing the tubular string from the wellbore and then flowing another fluid into the wellbore. A well system can include at least two fluids in a wellbore, the fluids having different densities, and a barrier substance separating the fluids.
IPC 8 full level
E21B 21/08 (2006.01)
CPC (source: EP US)
E21B 21/082 (2020.05 - EP US); E21B 21/085 (2020.05 - EP US)
Designated contracting state (EPC)
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 SE SI SK SM TR
DOCDB simple family (publication)
WO 2011136761 A1 20111103; AU 2010352027 A1 20121025; AU 2010352027 B2 20130801; BR 112012026845 A2 20160712; BR 112012026845 B1 20190917; CA 2795910 A1 20111103; CA 2795910 C 20150120; EP 2564016 A1 20130306; EP 2564016 A4 20130626; EP 2564016 B1 20160608; MX 2012012385 A 20130530; SG 184922 A1 20121129
DOCDB simple family (application)
US 2010032578 W 20100427; AU 2010352027 A 20100427; BR 112012026845 A 20100427; CA 2795910 A 20100427; EP 10850856 A 20100427; MX 2012012385 A 20100427; SG 2012077376 A 20100427