Oil well completion tool having severable tubing string...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 23/00 (2006.01) E21B 43/00 (2006.01)

Patent

CA 2676964

An oil well completion tool having a tubular assembly defining an elongated main passage is adapted to be connected to a multiple-section tubing string within an oil well casing. A severable plug is mounted in the tubular assembly in normal blocking relationship to the passage. A movable shear cylinder unit has a plug-severing edge operable to sever an entire central segment of the plug from a remaining peripheral portion thereof. Separate hinge structure has an elongated U-shaped leg portion connected to the central segment of the plug. The leg portion of the hinge structure, which undergoes elongation, is operable to retain the severed central segment of the plug in the main passage while allowing the central segment of the plug to bodily shift independent of and in a direction away from the peripheral portion of the plug. The severed central segment is received in a recess therefor in the tubular assembly wall structure in order to prevent interference of the severed central plug segment with the main passage.

L'invention concerne un outil de complétion de puits de pétrole ayant un ensemble tubulaire définissant un conduit principal allongé. Ledit outil est adapté pour être raccordé à une chaîne de tiges de production à sections multiples dans un tubage pour puits de pétrole. Un bouchon séparable est monté dans l'ensemble tubulaire dans une relation de blocage normale sur le conduit. Une unité de vérin de cisaille mobile a un bord de séparation de bouchon obturateur destiné à séparer tout un segment central du bouchon de sa partie périphérique restante. Une structure distincte à charnières a une partie de branche allongée en forme de U raccordée au segment central du bouchon. La partie de branche de la structure à charnières, qui subit l'allongement, est destinée à retenir le segment central séparé du bouchon dans le conduit principal tout en permettant au segment central séparé du bouchon de se déplacer en entier indépendamment de la partie périphérique du bouchon et dans une direction loin de cette partie périphérique du bouchon. Le segment central séparé est reçu dans un renfoncement prévu pour celui-ci dans la structure de paroi d'ensemble tubulaire afin d'empêcher toute interférence du segment de bouchon central avec le conduit principal.

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