EP 0799363 B1 19990506 - STEERABLE DRILLING WITH DOWNHOLE MOTOR
Title (en)
STEERABLE DRILLING WITH DOWNHOLE MOTOR
Title (de)
RICHTBOHREN MIT BOHRLOCHMOTOR
Title (fr)
SYSTEME DE FORAGE ORIENTABLE A MOTEUR DE FOND DE PUITS
Publication
Application
Priority
- EP 95943229 A 19951220
- EP 9505163 W 19951220
- EP 94203712 A 19941221
Abstract (en)
[origin: WO9619635A1] A method is provided for creating a borehole in an earth formation using a drilling assembly comprising a drill string (5) extending into the borehole, a downhole motor (6) including a housing (7) and a drive shaft (8) for rotating a drill bit (9), which drive shaft has an inclined orientation relative to a longitudinal axis of the lower part of the drill string. The motor housing is connected to the lower part of the drill string in a manner so as to allow rotation of the motor housing about said longitudinal axis. The drilling assembly further comprises an electric motor (23) for rotation of the motor housing about said longitudinal axis and relative to the drill string. The method comprises drilling a substantially straight section of said borehole by inducing said electric motor to rotate the motor housing continuously about said longitudinal axis and relative to the drill string while the downhole motor is operated to rotate the drill bit.
IPC 1-7
IPC 8 full level
E21B 7/06 (2006.01)
CPC (source: EP)
E21B 7/068 (2013.01)
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
WO 9619635 A1 19960627; AR 004469 A1 19981216; AU 4435796 A 19960710; AU 692040 B2 19980528; BR 9510493 A 19980113; CA 2207923 A1 19960627; CA 2207923 C 20060516; CN 1062634 C 20010228; CN 1171142 A 19980121; CO 4480786 A1 19970709; DE 69509557 D1 19990610; DE 69509557 T2 19991104; DK 0799363 T3 19991115; EG 20620 A 19990930; EP 0799363 A1 19971008; EP 0799363 B1 19990506; MX 9704585 A 19971031; MY 115387 A 20030531; NO 310036 B1 20010507; NO 972878 D0 19970620; NO 972878 L 19970620; OA 10429 A 20020321; RU 2149248 C1 20000520; SA 95160479 B1 20050614; TN SN95131 A1 19960206
DOCDB simple family (application)
EP 9505163 W 19951220; AR 10062395 A 19951219; AU 4435796 A 19951220; BR 9510493 A 19951220; CA 2207923 A 19951220; CN 95197026 A 19951220; CO 95060551 A 19951220; DE 69509557 T 19951220; DK 95943229 T 19951220; EG 104595 A 19951219; EP 95943229 A 19951220; MX 9704585 A 19951220; MY PI9503957 A 19951219; NO 972878 A 19970620; OA 70030 A 19970620; RU 97112381 A 19951220; SA 95160479 A 19951227; TN SN95131 A 19951219