EP 2513413 A4 20170809 - CORE DRILLING TOOLS WITH RETRACTABLY LOCKABLE DRIVEN LATCH MECHANISMS
Title (en)
CORE DRILLING TOOLS WITH RETRACTABLY LOCKABLE DRIVEN LATCH MECHANISMS
Title (de)
KERNBOHRWERKZEUGE MIT EINZIEHBAREN SPERRRIEGELMECHANISMEN
Title (fr)
OUTILS DE CAROTTAGE AVEC MÉCANISMES DE VERROU COMMANDÉS VERROUILLABLES DE FAÇON RÉTRACTABLE
Publication
Application
Priority
- US 89887810 A 20101006
- US 96812710 A 20101214
- US 28710609 P 20091216
- US 2010060744 W 20101216
Abstract (en)
[origin: US2011079436A1] Implementations of the present invention include a core barrel assembly having a driven latch mechanism. The driven latch mechanism can lock the core barrel assembly axially and rotationally relative to a drill string. The driven latch mechanism can include a plurality of wedge members positioned on a plurality of driving surfaces. Rotation of the drill string can cause the plurality of wedge members to wedge between an inner diameter of the drill string and the plurality of driving surfaces, thereby rotationally locking the core barrel assembly relative to the drill string. The driven latch mechanism can further include a refracted groove adapted to lock the plurality of wedge members radially within the core barrel assembly, thereby allowing for faster travel within the drill string. Implementations of the present invention also include drilling systems including such driven latch mechanisms, and methods of retrieving a core sample using such drilling systems.
IPC 8 full level
E21B 23/02 (2006.01); E21B 25/02 (2006.01)
CPC (source: EP US)
E21B 23/02 (2013.01 - US); E21B 25/02 (2013.01 - EP US)
Citation (search report)
- [X] BE 901883 A 19850701 - VISH MINNO GEOLOJKI INST
- [X] AU 4409472 A 19740103 - MINDRILL LTD
- [A] SU 825852 A1 19810430 - VORONOVA MARGARITA V [SU], et al
- [A] WO 9708426 A1 19970306 - DOWN HOLE TECH PTY LTD [AU], et al
- See references of WO 2011084589A2
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)
US 2011079436 A1 20110407; US 8485280 B2 20130716; AU 2010339878 A1 20120705; AU 2010339878 B2 20141120; BR 112012014787 A2 20170314; CA 2784532 A1 20110714; CA 2784532 C 20150127; CL 2012001618 A1 20130405; CN 102782248 A 20121114; CN 102782248 B 20150429; EP 2513413 A2 20121024; EP 2513413 A4 20170809; NZ 600697 A 20140725; PE 20130054 A1 20130204; US 2013313024 A1 20131128; US 9234398 B2 20160112; WO 2011084589 A2 20110714; WO 2011084589 A3 20110929; ZA 201205268 B 20130925
DOCDB simple family (application)
US 96812710 A 20101214; AU 2010339878 A 20101216; BR 112012014787 A 20101216; CA 2784532 A 20101216; CL 2012001618 A 20120615; CN 201080057031 A 20101216; EP 10842597 A 20101216; NZ 60069710 A 20101216; PE 2012000823 A 20101216; US 2010060744 W 20101216; US 201313943460 A 20130716; ZA 201205268 A 20120716