EP 1957850 A1 20080820 - CONNECTION ASSEMBLY FOR DRILL COLLARS OR HEAVY DRILL PIPES
Title (en)
CONNECTION ASSEMBLY FOR DRILL COLLARS OR HEAVY DRILL PIPES
Title (de)
VERBINDUNGSBAUGRUPPE FÜR SCHWERSTANGEN ODER SCHWERE BOHRGESTÄNGE
Title (fr)
ENSEMBLE A RACCORD POUR MASSE-TIGES OU TIGES LOURDES DE FORAGE
Publication
Application
Priority
- FR 2006002629 W 20061201
- FR 0512356 A 20051206
Abstract (en)
[origin: WO2007065986A1] The invention relates to a connection assembly (100) for drill collars or heavy drill pipes comprising: a male connection element which comprises, in its longitudinal direction, an at least partially threaded conical surface portion which tapers from the first portion towards its free end; a female connection element which comprises an at least partially threaded conical inner surface and a cylindrical inner surface (220), said two connection elements being complementary so that one can be assembled in the other by screwing, characterized in that the male connection element additionally comprises, between its free end and said conical surface portion, another surface portion whose conicity is less than that of said surface portion and which is dimensioned with respect to said cylindrical inner surface (220) such that there is a clearance by virtue of which these two surfaces bear one against the other when the assembly is subjected to a bending stress.
IPC 8 full level
F16L 15/06 (2006.01)
CPC (source: EP US)
E21B 17/042 (2013.01 - EP US)
Citation (search report)
See references of WO 2007065986A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2894279 A1 20070608; FR 2894279 B1 20100827; AT E430280 T1 20090515; DE 602006006594 D1 20090610; DK 1957850 T3 20090824; EP 1957850 A1 20080820; EP 1957850 B1 20090429; US 2008289879 A1 20081127; WO 2007065986 A1 20070614
DOCDB simple family (application)
FR 0512356 A 20051206; AT 06841839 T 20061201; DE 602006006594 T 20061201; DK 06841839 T 20061201; EP 06841839 A 20061201; FR 2006002629 W 20061201; US 9651806 A 20061201