EP 2246520 B1 20110615 - Kelly bar assembly
Title (en)
Kelly bar assembly
Title (de)
Kellystangenanordnung
Title (fr)
Agencement de barre Kelly
Publication
Application
Priority
EP 09005752 A 20090424
Abstract (en)
[origin: EP2246520A1] The arrangement has a tubular inner rod (4) axially movably arranged against tubular outer rods (5', 5'', 5''') in a torque-proof manner. A spring unit (1) is arranged in a lower region of the inner rod for springing axial movement of the inner rod against the outer rods and is formed as an elastomer spring. Spacer rings (21', 21'') are formed from metal, and connection elements (22) are integrally formed on the spacer rings by metal forming. The spring unit includes elastomer spring elements (10', 10'', 10''') connected with each other by the spacer rings.
IPC 8 full level
E21B 17/07 (2006.01)
CPC (source: EP US)
E21B 17/07 (2013.01 - EP US)
Designated contracting state (EPC)
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 SE SI SK TR
DOCDB simple family (publication)
EP 2246520 A1 20101103; EP 2246520 B1 20110615; AT E513116 T1 20110715; BR PI1001323 A2 20131224; BR PI1001323 B1 20190409; CN 101871326 A 20101027; CN 101871326 B 20121219; HK 1149061 A1 20110923; US 2011105235 A1 20110505; US 8246474 B2 20120821
DOCDB simple family (application)
EP 09005752 A 20090424; AT 09005752 T 20090424; BR PI1001323 A 20100427; CN 201010171492 A 20100422; HK 11103116 A 20110328; US 76366910 A 20100420