(19)
(11) EP 1 042 582 A1

(12)

(43) Date of publication:
11.10.2000 Bulletin 2000/41

(21) Application number: 98966927.0

(22) Date of filing: 28.12.1998
(51) International Patent Classification (IPC)7E21B 19/16, E21B 19/08, E21B 19/06
(86) International application number:
PCT/EP9808/580
(87) International publication number:
WO 9934/088 (08.07.1999 Gazette 1999/27)
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 24.12.1997 US 998152
26.12.1997 US 998461

(71) Applicant: Weatherford/Lamb Inc.
Wilmington, DE 19805 (US)

(72) Inventors:
  • SPREIJ, Leendert
    NL-4872 WZ Etten-Leur (NL)
  • ALBRIGHT, Steven, Lee
    Houston, TX 77055 (US)
  • BEARB, Jean, Donald
    McAllen, TX 78501 (US)
  • LEICHT, Frederick, Marion
    Cypress, TX 77429 (US)
  • HAYES, Michael, Warren
    Lafayette, LA 70503 (US)
  • BIRDWELL, John, Cleveland
    Liberty, TX 77575 (US)

(74) Representative: Harding, Richard Patrick et al
Marks & Clerk,4220 Nash Court,Oxford Business Park South
Oxford OX4 2RU
Oxford OX4 2RU (GB)

   


(54) WEIGHT COMPENSATION DEVICE