Running and setting tool for packers

Details Running and setting tool for packers Running and setting tool for packers

E - Fixed Constructions

21

B

E21B 23/06 (2006.01)

Patent

CA 2217507

A running/setting tool for packers is disclosed which can release in several different ways. The tool can be pumped through for normal release. The tool may be hydraulically released by dropping and pumping a ball to a seat and subsequent pressurizing. A frangible member is provided so that if circulation is impeded, it can be established by breaking the frangible member to allow a ball to be pumped to a seat. Finally, a shear release technique is provided which allows release by breaking a shear pin or shear ring or other frangible member, which unsupports collets to allow for removal. A support shoulder is provided on the tool to prevent the collets from becoming stressed on the trip out of the hole if the tool encounters a collar or other internal obstruction.

Cette invention concerne un outil de descente et de pose de packers caractérisé par des moyens de désaccouplement multiples. L'outil peut être désaccouplé normalement par pompage traversant. Il peut aussi l'être par voie hydraulique en laissant tomber une boule dans l'outil et en la chassant contre un siège pour la mise pression de l'outil. Un élément frangible, à être rompu en cas de blocage de la circulation de fluide, permet de rétablir cette circulation et de chasser la boule contre le siège susmentionné. Enfin, l'outil peut être désaccouplé par rupture d'une cheville de cisaillement ou un autre type d'élément frangible pour dégager les bagues de serrage. L'outil comporte un épaulement servant à protéger les bagues de serrage contre des efforts indus au retrait de l'outil, par exemple à la rencontre d'un collier ou de toute autre obstruction interne.

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