E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/10 (2006.01) E21B 17/10 (2006.01)
Patent
CA 2453047
A stabiliser is disclosed for stabilising a radially expandable tubular element extending in a wellbore drilled into an earth formation. The stabiliser comprises a radially expandable tubular member selected from a section of the tubular element and a sleeve surrounding the tubular element, and at least one stabiliser arm connected to the tubular member, each arm being movable from a radially retracted position to a radially extended position by the action of a spring force. The stabiliser further comprises locking means arranged to lock each arm in the retracted position when the tubular element is in the unexpanded form and to unlock the arm upon radial expansion of the tubular member so as to allow the arm to move to the extended position thereof.
Cette invention concerne un stabilisateur servant à stabiliser un élément tubulaire à expansion radiale placé dans un puits de forage. Ce stabilisateur comprend un élément tubulaire à expansion radiale faisant partie d'un élément tubulaire et entouré d'un manchon. On trouve en outre au moins un bras de stabilisateur relié à l'élément tubulaire, chaque bras pouvant passer d'une position radialement rentrée à une position radialement sortie sous l'action d'un ressort. De plus, le stabilisateur comprend des dispositifs de verrouillage qui bloquent chaque bras en position de rappel lorsque l'élément ne se trouve en position d'expansion et qui le débloquent au moment de l'expansion radiale, ce qui permet au bras de passer en position sortie.
Shell Canada Limited
Smart & Biggar
LandOfFree
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