EP 3058164 A2 20160824 - METHODS FOR DRILLING AND PRODUCING FROM COAL BED FORMATIONS AND ASSOCIATED APPARATUS
Title (en)
METHODS FOR DRILLING AND PRODUCING FROM COAL BED FORMATIONS AND ASSOCIATED APPARATUS
Title (de)
VERFAHREN ZUM BOHREN UND PRODUZIEREN AUS KOHLEBETTFORMATIONEN UND ZUGEHÖRIGE VORRICHTUNG
Title (fr)
PROCÉDÉS DE FORAGE ET DE PRODUCTION À PARTIR DE FORMATIONS HOUILLÈRES ET APPAREIL ASSOCIÉ
Publication
Application
Priority
- GB 201317181 A 20130927
- GB 2014052921 W 20140926
Abstract (en)
[origin: WO2015044674A2] There are described methods and apparatus of drilling coal bed methane formations. In some examples, there is given a method of drilling a formation, comprising drilling at least one wellbore in a coal bed methane formation using a drill string having an inner string and an outer string, the inner string and outer string defining a passageway therebetween; providing a drilling medium to drill apparatus for use in drilling the formation, the drilling medium provided through one of the inner or outer strings; and returning a combined medium comprising drilling medium, drilling cuttings, produced water and/or gas from the formation to surface via the other of the inner and outer string. Subsequent to drilling the formation, there are also described methods and apparatus for producing from coal bed methane formations. In some examples, this includes producing a first fluid, or fluid product (e.g. water and gas) from a first flow passage within a wellbore; and also producing a second fluid, or fluid product, (e.g. methane) from a second flow passage within the wellbore.
IPC 8 full level
E21B 21/12 (2006.01)
CPC (source: EP US)
E21B 7/00 (2013.01 - US); E21B 21/065 (2013.01 - US); E21B 21/067 (2013.01 - US); E21B 21/12 (2013.01 - EP US); E21B 43/006 (2013.01 - EP US); E21B 43/305 (2013.01 - EP US); E21B 49/003 (2013.01 - US)
Citation (search report)
See references of WO 2015044674A2
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)
WO 2015044674 A2 20150402; WO 2015044674 A3 20150917; AU 2014326356 A1 20160519; EP 3058164 A2 20160824; GB 201317181 D0 20131106; US 2016245050 A1 20160825
DOCDB simple family (application)
GB 2014052921 W 20140926; AU 2014326356 A 20140926; EP 14780893 A 20140926; GB 201317181 A 20130927; US 201415024721 A 20140926