EP 1330590 A1 20030730 - CONTINUOUS CIRCULATION DRILLING METHOD
Title (en)
CONTINUOUS CIRCULATION DRILLING METHOD
Title (de)
BOHRVERFAHREN MIT KONTINUIERLICHER ZIRKULATION
Title (fr)
PROCEDE DE FORAGE A CIRCULATION CONTINUE
Publication
Application
Priority
- GB 0104803 W 20011030
- GB 0026598 A 20001031
Abstract (en)
[origin: WO0236928A1] A coupler and a method for continuously circulating a drilling fluid through a drill string while adding or removing tubulars has a lower fluid pressure seal adapted to engage a drill string; lower grips adapted to engage a drill string; a valve positioned above said lower grips; upper grips adapted to engage a tubular to be added to or removed from said string; and an upper fluid pressure seal adapted to engage said tubular.
IPC 1-7
IPC 8 full level
E21B 19/16 (2006.01); E21B 33/068 (2006.01); E21B 21/00 (2006.01)
CPC (source: EP)
E21B 19/16 (2013.01); E21B 21/085 (2020.05); E21B 33/068 (2013.01); E21B 33/085 (2013.01)
Citation (search report)
See references of WO 0236928A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0236928 A1 20020510; AU 1073902 A 20020515; BR 0115380 A 20040210; CA 2427204 A1 20020510; EP 1330590 A1 20030730; GB 0026598 D0 20001213; MX PA03003670 A 20040504; NO 20031857 D0 20030425; NO 20031857 L 20030625; NO 335857 B1 20150309
DOCDB simple family (application)
GB 0104803 W 20011030; AU 1073902 A 20011030; BR 0115380 A 20011030; CA 2427204 A 20011030; EP 01978643 A 20011030; GB 0026598 A 20001031; MX PA03003670 A 20011030; NO 20031857 A 20030425