Title:
MAGNETIC RANGING WHLE DRILLING USING AN ELECTRIC DIPOLE SOURCE AND A MAGNETIC FIELD SENSOR
Document Type and Number:
WIPO Patent Application WO/2009/128990
Kind Code:
A3
Abstract:
A system and methods for drilling a well in a field having an existing well are provided. In accordance with one embodiment, a method of drilling a new well (14) in a field having an existing well (12) includes drilling the new well using a bottom hole assembly (BHA) having a drill collar divided by an insulated gap (34), generating a current on the drill collar of the BHA while drilling the new well, and measuring from the existing well a magnetic field (36) caused by the current on the drill collar of the BHA. Using measurements of the magnetic field, the relative position of the new well to the existing well may be determined.
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Inventors:
CLARK BRIAN (US)
GOSWAMI JAIDEVA C (US)
GOSWAMI JAIDEVA C (US)
Application Number:
PCT/US2009/035860
Publication Date:
April 28, 2011
Filing Date:
March 03, 2009
Export Citation:
Assignee:
SCHLUMBERGER CA LTD (CA)
SCHLUMBERGER TECHNOLOGY B Y (NL)
PRAD RES & DEV LTD (GB)
SCHLUMBERGER SERVICES PETROL (FR)
SCHLUMBERGER HOLDINGS (GB)
CLARK BRIAN (US)
GOSWAMI JAIDEVA C (US)
SCHLUMBERGER TECHNOLOGY B Y (NL)
PRAD RES & DEV LTD (GB)
SCHLUMBERGER SERVICES PETROL (FR)
SCHLUMBERGER HOLDINGS (GB)
CLARK BRIAN (US)
GOSWAMI JAIDEVA C (US)
International Classes:
E21B47/022
Foreign References:
| US20080041626A1 | 2008-02-21 | |||
| US3406766A | 1968-10-22 | |||
| US20070126426A1 | 2007-06-07 |
Attorney, Agent or Firm:
FONSECA, Darla, P. et al. (200 Gillingham Lane Md 200-9Sugar Land, TX, US)
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