EP 2935758 A1 20151028 - DRILL STRING COMPONENTS RESISTANT TO JAMMING
Title (en)
DRILL STRING COMPONENTS RESISTANT TO JAMMING
Title (de)
VERSTOPFUNGSBESTÄNDIGE BOHRSTRANGKOMPONENTE
Title (fr)
COMPOSANTS DE TRAIN DE TIGES DE FORAGE RÉSISTANTS AU CALAGE
Publication
Application
Priority
- US 201213717885 A 20121218
- US 2013075646 W 20131217
Abstract (en)
[origin: WO2014099902A1] Aspects of the present invention include drill string components having a thread extending around a body. The leading end of the thread can have a configuration that resists jamming and cross-threading. In particular, the leading end of the thread can include a planar surface normal to the body. The leading end of the thread can provide an abrupt transition to full thread depth that helps reduce or eliminate cross-threading. The leading end of the thread can be oriented at an angle relative to the axis of the drill string component. When mating male and female threads are similarly structured, the mating threads slide together along an interface at the thread start face and are drawn into a fully thread-coupled condition. The thread starts may have full circumference mating with no jamming positions.
IPC 8 full level
E21B 17/042 (2006.01); E21B 19/16 (2006.01)
CPC (source: EP)
E21B 17/042 (2013.01)
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 2014099902 A1 20140626; AU 2013362987 A1 20150430; BR 112015013326 A2 20170711; CA 2890468 A1 20140626; CL 2015001717 A1 20151030; CN 104919129 A 20150916; EP 2935758 A1 20151028; EP 2935758 A4 20170118; PE 20151102 A1 20150806
DOCDB simple family (application)
US 2013075646 W 20131217; AU 2013362987 A 20131217; BR 112015013326 A 20131217; CA 2890468 A 20131217; CL 2015001717 A 20150617; CN 201380062779 A 20131217; EP 13865824 A 20131217; PE 2015001022 A 20131217