Apparatus and method for inserting and retrieving a tool...

E - Fixed Constructions – 21 – B

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E21B 33/068 (2006.01) E21B 23/00 (2006.01) E21B 33/06 (2006.01)

Patent

CA 2697139

Well surface equipment is provided to seal around the outer surface of portions of tool sections as the tool sections are assembled or disconnected in a portion of the well surface equipment. The portion of the well surface equipment is isolated from wellhead pressure to enhance well operator control during assembly or disassembly of a tool string. Also, if a fluid path is opened up due to activation of the tool string (such as initiation of a detonating cord that is placed in the fluid path), a barrier mechanism is actuated to block fluid communication through this fluid path so that a portion of the well surface equipment can remain isolated from wellhead pressure to enable convenient retrieval and disconnection of tool sections.

Un équipement de surface de puits est prévu pour former un scellement entre la surface extérieure de partie de sections d'outils alors que ces sections sont assemblées ou démontées dans une partie de l'équipement de surface du puits. Cette partie est isolée de la pression de la tête de puits afin d'améliorer le contrôle de l'exploitant du puits lors de l'assemblage et du démontage du train d'outils. De plus, si un circuit de fluide est ouvert en raison de l'activation du train d'outils (par exemple l'allumage d'un cordeau détonant qui se trouve dans le circuit de fluide), un mécanisme à barrière est activé pour empêcher toute communication du fluide avec le circuit en question, de telle sorte qu'une partie de l'équipement de surface du puits peut demeurer isolée de la pression de la tête de puits afin de permettre le retrait et le démontage pratique du train d'outils.

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