Locking apparatus with packoff capability

Details Locking apparatus with packoff capability Locking apparatus with packoff capability

E - Fixed Constructions

21

B

E21B 23/02 (2006.01)

Patent

CA 2499119

A well tool locking apparatus compatible with high temperature, high pressure well conditions comprises a packing ring mandrel that carries a sliding locking dog cage. The locking dogs are expanded radially into a tubing nipple channel by the axial translation of a ramped step on the mandrel surface. Chevron ring packing seals are positioned between the locking dog cage and an abutment shoulder around the mandrel. Translation of the mandrel against the locking dog cage engages the tool locking dogs and expands the chevron ring seal against the inside bore surface of the tubing nipple. The locked and sealed position is held by buttress threads on the mandrel engaged with a body lock ring

L'invention concerne un dispositif de verrouillage d'outil de puits compatible avec des conditions d'exploitation de puits haute température et haute pression, qui comprend un mandrin à anneau de serrage portant une cage à griffes de blocage coulissante. Ces griffes s'étendent radialement dans un canal de raccord de colonne, par la translation axiale d'un pas incliné sur la surface du mandrin. Des joints annulaires en chevron sont placés entre la cage susmentionnée et une épaule de butée autour du mandrin. La translation du mandrin contre la cage enclenche les griffes de blocage d'outil et induit l'expansion des joints annulaires en chevron contre la surface de puits interne du raccord de colonne. La position verrouillée et étanche est maintenue par des filets à scie sur le mandrin qui coopèrent avec un anneau de serrage de corps.

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