(19)
(11) EP 2 360 347 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.02.2014 Bulletin 2014/09

(43) Date of publication A2:
24.08.2011 Bulletin 2011/34

(21) Application number: 11154062.1

(22) Date of filing: 10.02.2011
(51) International Patent Classification (IPC): 
E21B 34/14(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 11.02.2010 NO 20100211

(71) Applicant: I-TEC AS
4052 Røyneberg (NO)

(72) Inventors:
  • Brække, Kristoffer
    4025 Stavanger (NO)
  • Lunde, Geir
    4326 Sandnes (NO)
  • Antonsen, Roger
    4070 Randaberg (NO)

(74) Representative: Tafjord, Harald 
Bryn Aarflot AS P.O. Box 449 Sentrum
0104 Oslo
0104 Oslo (NO)

   


(54) Expandable ball seat


(57) Apparatus for a drop ball activated device, where a ball seat (4) is concentrically and axially slidably disposed within an outer sleeve (1) having a first internal cylindrical surface, wherein the ball seat (4) comprises at least one radially extending lug (6), which in a first position extends radially inwards from the internal cylindrical surface, thereby defining a first ball seat diameter less than the diameter of the drop ball. The sleeve (1) comprises at least one groove (7) in its internal surface, and the lug (6) may be received in the groove (7), thereby defining a second ball seat diameter at least as large as the diameter of the drop ball (9).







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Search report