(19)
(11) EP 1 149 980 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.01.2002 Bulletin 2002/05

(43) Date of publication A2:
31.10.2001 Bulletin 2001/44

(21) Application number: 01303588.6

(22) Date of filing: 19.04.2001
(51) International Patent Classification (IPC)7: E21B 33/127, E21B 23/04, E21B 23/06, E21B 41/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 25.04.2000 US 558695

(71) Applicant: Halliburton Energy Services, Inc.
Dallas, Texas 75381-9052 (US)

(72) Inventors:
  • Clemens, Jack
    Plano, Texas 75023 (US)
  • Moore, Darrell
    Irving, Texas 75060 (US)
  • Campbell, Michael
    Dallas, Texas 75243 (US)

(74) Representative: Curtis, Philip Anthony et al
A.A. Thornton & Co., 235 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)

   


(54) Downhole hydraulic power unit


(57) A self-contained and downhole powered hydraulic power unit (10) is used to supply pressurized hydraulic fluid to manipulate downhole tools. In one embodiment, the unit (10) is self contained and is powered by a battery located down hole and can be lowered into the well by wire line, coiled tubing or tubing process. When properly positioned and actuated the unit (10) will deliver fluid to actuate the downhole tool. A battery-powered motor drives a hydraulic piston in a cylinder to pump fluid carried by the unit to the well tool.






Search report