Global Patent Index - EP 1242713 A1

EP 1242713 A1 2002-09-25 - CONTROLLING THE FLOW OF DRIVING FLUID TO A SYSTEM OF MULTIPLE HYDRAULIC MOTORS

Title (en)

CONTROLLING THE FLOW OF DRIVING FLUID TO A SYSTEM OF MULTIPLE HYDRAULIC MOTORS

Title (de)

STEUERN DES DURCHFLUSSES EINER TREIBENDEN FLÜSSIGKEIT ZU EINEM AUS MEHREREN HYDRAULISCHEN MOTOREN BESTEHENDEN SYSTEM

Title (fr)

COMMANDE DU FLUX DU FLUIDE ALIMENTANT UN SYSTEME CONSTITUE DE MULTIPLES MOTEURS HYDRAULIQUES

Publication

EP 1242713 A1 (EN)

Application

EP 00987326 A

Priority

  • EP 00987326 A
  • EP 0011996 W
  • EP 99309530 A

Abstract (en)

[origin: WO0140616A1] A device (20) for controlling hydraulic power supplied to a system of a plurality of hydraulic motors (10, 11) of a drill string for drilling a borehole into an earth formation, each hydraulic motor being arranged to drive a respective drill bit of the drill string, the device comprising means for dividing a stream of hydraulic fluid flowing through the drill string into a plurality of sub-streams (32, 33), each sub-stream driving a respective one of said motors, and control means for increasing the hydraulic power of a selected sub-stream and for decreasing the hydraulic power of at least one of the other sub-streams in response to an increase of fluid pressure drop across the motor driven by the selected sub-stream.

IPC 1-7 (main, further and additional classification)

E21B 21/08

IPC 8 full level (invention and additional information)

E21B 4/16 (2006.01); E21B 21/08 (2006.01); E21B 44/00 (2006.01)

CPC (invention and additional information)

E21B 4/16 (2013.01); E21B 21/08 (2013.01); E21B 44/005 (2013.01)

Citation (search report)

See references of WO 0140616A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0140616 A1 20010607; EP 1242713 A1 20020925; NO 20022509 A 20020725; NO 20022509 D0 20020528; OA 12104 A 20060504

INPADOC legal status


2004-10-21 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2004-09-15 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040309

2002-12-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20021022

2002-09-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020417

2002-09-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR