EP 2692982 A3 20170726 - Near-bit borehole opener tool and method of reaming
Title (en)
Near-bit borehole opener tool and method of reaming
Title (de)
Bohrlochöffnungswerkzeug in Bitnähe und Erweiterungsverfahren
Title (fr)
Outil d'ouverture de trou de forage près d'un trépan et procédé d'alésage
Publication
Application
Priority
- EP 12305953 A 20120801
- EP 13155472 A 20130215
Abstract (en)
[origin: EP2692982A2] The present disclosure relates to a near-bit borehole opener (reamer) tool and a method of drilling a wellbore comprising: (a) disposing in the wellbore a tool string; (b) lowering and rotating the tool string and drilling a first portion of the wellbore having a first diameter with the drill bit, wherein at least one cutter assembly of a first borehole reamer is in a closed position; (c) reaming with a second borehole reamer a portion of the wellbore to a second diameter larger than the first diameter, wherein a rat hole portion of the wellbore is not reamed with the second borehole reamer, said rat hole portion of the wellbore having the first diameter; (d) extending the at least one cutter assembly of the first borehole reamer; and (e) concurrently rotating and moving the first borehole reamer up or down in the rat hole portion of the wellbore with the first diameter and abrading and cutting away the wellbore wall contacted by the at least one cutter assembly of the first borehole reamer assembly, thereby enlarging the diameter of a portion of the rat hole portion of the wellbore.
IPC 8 full level
E21B 10/32 (2006.01)
CPC (source: EP US)
E21B 7/064 (2013.01 - US); E21B 10/32 (2013.01 - EP US); E21B 10/42 (2013.01 - EP US)
Citation (search report)
- [XI] US 2010089583 A1 20100415 - XU WEI JAKE [US], et al
- [XP] US 2012211280 A1 20120823 - DEWEY CHARLES [US], et al
- [E] WO 2014116934 A1 20140731 - HALLIBURTON ENERGY SERV INC [US]
- [X] US 2012055712 A1 20120308 - JEFFRYES BENJAMIN PETER [GB], et al
- [X] US 2170451 A 19390822 - JOHN GRANT
- [X] US 2170452 A 19390822 - JOHN GRANT
- [A] US 2008245574 A1 20081009 - CAMPBELL JOHN E [US], et al
- [A] US 2005126826 A1 20050616 - MORIARTY KEITH A [US], et al
- [A] US 2010025116 A1 20100204 - HUTTON RICHARD [GB]
- [A] US 2007095573 A1 20070503 - TELFER GEORGE [GB]
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)
EP 2692982 A2 20140205; EP 2692982 A3 20170726; EP 2692982 A8 20140409; US 2015226009 A1 20150813; WO 2014022025 A1 20140206
DOCDB simple family (application)
EP 13155472 A 20130215; US 2013047558 W 20130625; US 201314417490 A 20130625