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1. WO2009012218 - SYSTEM AND METHOD FOR AN AC POWERED DOWNHOLE GAUGE

Publication Number WO/2009/012218
Publication Date 22.01.2009
International Application No. PCT/US2008/069968
International Filing Date 14.07.2008
IPC
E21B 47/06 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
47Survey of boreholes or wells
06Measuring temperature or pressure
E21B 47/00 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
47Survey of boreholes or wells
G01V 9/00 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
9Prospecting or detecting by methods not provided for in groups G01V1/-G01V8/115
CPC
E21B 43/128
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
121Lifting well fluids
128Adaptation of pump systems with down-hole electric drives
E21B 47/00
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
47Survey of boreholes or wells
G01V 11/002
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
11Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
002Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant
Applicants
  • BAKER HUGHES INCORPORATED [US]/[US] (AllExceptUS)
  • LAYTON, James, E. [US]/[GB] (UsOnly)
  • KNOX, Dick, L. [US]/[US] (UsOnly)
  • BESSER, Gordon, L. [US]/[US] (UsOnly)
Inventors
  • LAYTON, James, E.
  • KNOX, Dick, L.
  • BESSER, Gordon, L.
Agents
  • HENDRYX, Thomas, N.
Priority Data
11/779,76818.07.2007US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEM AND METHOD FOR AN AC POWERED DOWNHOLE GAUGE
(FR) SYSTÈME ET PROCÉDÉ POUR JAUGE DE FOND DE TROU ALIMENTÉE EN COURANT ALTERNATIF
Abstract
(EN)
Borehole instruments are powered by AC instrument power transmitted on all three phases of a power cable concurrently carrying three phase motor power, the instrument power transmitted at a multiple of the motor power frequency and having a corresponding fraction of the motor power voltage, and received via a capacitive coupling sufficient to withstand high-voltage cable insulation testing. The phase-to-neutral motor power provides approximately the same power level to the borehole instruments if a phase shorts to ground.
(FR)
Selon l'invention, des instruments de trou de forage sont alimentés par une alimentation en courant alternatif transmise sur les trois phases d'un câble d'alimentation transportant simultanément une alimentation de moteur triphasé, l'alimentation des instruments étant transmise à un multiple de la fréquence d'alimentation du moteur et présentant une fraction correspondante de la tension d'alimentation du moteur, et reçue par l'intermédiaire d'un couplage capacitif suffisant pour résister à des essais d'isolation de câbles haute tension. L'alimentation du moteur phase-à-neutre fournit approximativement le même niveau d'alimentation aux instruments de trou de forage si une phase connaît un court-circuit à la terre.
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