(19)
(11) EP 0 874 130 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.08.1999 Bulletin 1999/34

(43) Date of publication A2:
28.10.1998 Bulletin 1998/44

(21) Application number: 98400998.5

(22) Date of filing: 24.04.1998
(51) International Patent Classification (IPC)6: E21B 43/117, E21B 43/119
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 25.04.1997 US 846079

(71) Applicants:
  • SCHLUMBERGER LIMITED
    New York, N.Y. 10172 (US)

    GB 
  • SERVICES PETROLIERS SCHLUMBERGER
    F-75007 Paris (FR)

    FR 
  • SCHLUMBERGER TECHNOLOGY B.V.
    2514 JG The Hague (NL)

    DK IT 
  • SCHLUMBERGER HOLDINGS LIMITED
    Road Town, Tortola (VG)

    NL 

(72) Inventors:
  • Markel, Daniel
    Houston, Texas 77083 (US)
  • Lopez de Cardenas, Jorge
    Caracas (VE)
  • Vu, Victor
    Sugar Land, Texas 77478 (US)

(74) Representative: Hagel, Francis et al
ETUDES ET PRODUCTIONS SCHLUMBERGER Service Brevets B.P. 202
92142 Clamart Cédex
92142 Clamart Cédex (FR)

   


(54) Phased perforating guns


(57) A perforating gun having a base structure (108) made of a deformable material. The base structure includes support rings (114) integrally attached to one another by connector portions. The capsule charges (110) are mounted in corresponding support rings, and each support ring is adjustable by selective deformation of the base structure to face in one of a plurality of directions to provide a plurality of combinations of phasing patterns.






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