EP 2516788 A1 20121031 - METHOD OF DRILLING AND JET DRILLING SYSTEM
Title (en)
METHOD OF DRILLING AND JET DRILLING SYSTEM
Title (de)
BOHRVERFAHREN UND STRAHLBOHRSYSTEM
Title (fr)
PROCÉDÉ DE FORAGE ET SYSTÈME DE FORAGE HYDRODYNAMIQUE
Publication
Application
Priority
- EP 09180516 A 20091223
- EP 2010070490 W 20101222
- EP 10798559 A 20101222
Abstract (en)
[origin: WO2011076845A1] Method of drilling, comprising providing a drill string (1) in a borehole (2), the drill string comprising an abrasive jet drill head (16) including a jet nozzle (18), the drill string providing a passageway (20) for fluid to the jet nozzle; supplying a supply fluid mixture via the drill string to the abrasive jet drill head comprising a supply concentration of abrasive particles; generating an abrasive jet (19) of a jetting fluid mixture comprising a jetting concentration of abrasive particles at the jet nozzle, so as to blast with an erosive power on an impingement area of the borehole, wherein the jetting concentration depends on the supply concentration; and modulating (14) the jetting concentration of the abrasive particles; wherein the supply concentration of abrasive particles in the supply fluid mixture is modulated in order to modulate the jetting concentration in the abrasive jet.
IPC 8 full level
E21B 7/04 (2006.01); B24C 9/00 (2006.01); E21B 7/00 (2006.01); E21B 7/18 (2006.01)
CPC (source: EP US)
B24C 1/045 (2013.01 - EP US); B24C 5/02 (2013.01 - EP US); E21B 7/04 (2013.01 - EP US); E21B 7/18 (2013.01 - EP US); E21B 21/002 (2013.01 - EP US)
Citation (search report)
See references of WO 2011076845A1
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
DOCDB simple family (publication)
WO 2011076845 A1 20110630; AU 2010334861 A1 20120705; AU 2010334861 B2 20150730; BR 112012015440 A2 20160315; CA 2784545 A1 20110630; CN 102667047 A 20120912; CN 102667047 B 20151125; EP 2516788 A1 20121031; US 2012255792 A1 20121011
DOCDB simple family (application)
EP 2010070490 W 20101222; AU 2010334861 A 20101222; BR 112012015440 A 20101222; CA 2784545 A 20101222; CN 201080058360 A 20101222; EP 10798559 A 20101222; US 201013518050 A 20101222