EP 1245783 A3 20021204 - Apparatus and method for directional drilling using coiled tubing
Title (en)
Apparatus and method for directional drilling using coiled tubing
Title (de)
Verfahren und Vorrichtung zum Richtbohren mit gewickeltem Rohrstrang
Title (fr)
Procédé et dispositif pour le forage dirigé utilisant un tubage enroulé
Publication
Application
Priority
- EP 97300719 A 19970205
- US 1126896 P 19960207
- US 78371197 A 19970116
Abstract (en)
[origin: EP1245783A2] A steerable directional drilling tool assembly includes a bent housing (12) defining a bend angle and having a mud motor (13) in its upper section and a drill bit (15) below its lower section, an orienting tool (17) rotatably coupled to such upper section and suspended on coiled tubing (20) that extends upward to the surface, an electric motor in the orienting tool operable to rotate the bent housing in either hand direction to change or adjust the tool face angle of the bit, or continuously rotate the bent housing so that the bit drills straight-ahead, and an electric cable extending throughout the coiled tubing to furnish power from the surface to the electric motor and transmit electric signals to and from the surface. A logging tool can be included in the assembly for measuring characteristics of the formation, the borehole, and the tool assembly. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 7/06 (2006.01)
CPC (source: EP)
E21B 7/067 (2013.01); E21B 7/068 (2013.01)
Citation (search report)
- [XAY] US 5441119 A 19950815 - HEAD PHILIP F [GB]
- [Y] WO 8002582 A1 19801127 - BENOIT L
- [Y] US 5394951 A 19950307 - PRINGLE RONALD E [US], et al
- [E] EP 0811745 A1 19971210 - BAKER HUGHES INC [US]
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 02076823 A 19970205