E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/068 (2006.01) E21B 33/05 (2006.01) E21B 33/16 (2006.01)
Patent
CA 2380286
A housing (164) is attached to a tubular sub located within a tubing string suspended in an earth borehole, the con-nection being an angled ball channel (186) connected between the housing (164) and the tubular sub (84). A ball carrier (174) is provided within the interior of the housing (164) which can be moved in two opposite directions either using pneumatic or hydraulic pressure against one or two pistons (176, 188). The ball carrier (174) can have either two balls or three balls (167, 169, 170). The movement of the ball carrier by the applied pressure causes one of the pockets (167, 169, 171) holding the balls to be aligned with the ball channel which allows the balls to be successively dropped into the ball channel and thus into the interior of the tubing string. Means are provided for ensuring that the balls are dropped in the proper sequence.
L'invention concerne un mécanisme comprenant un logement connecté à un raccord tubulaire situé dans une colonne de tubage suspendue dans un trou de forage de terrain, la connexion étant assurée par un canal de boulets incliné connectant le logement au raccord tubulaire. Un support de boulets situé à l'intérieur du logement peut être déplacé dans deux directions opposées par une pression pneumatique ou hydraulique exercée contre un ou deux pistons. Le support de boulets peut comprendre deux ou trois boulets. Le mouvement du support de boulets causé par la pression exercée permet d'aligner l'une des poches maintenant les boulets avec le canal de boulets, ce qui permet aux boulets de tomber de manière successive dans le canal de boulets et à l'intérieur de la colonne de tubage. L'invention comprend également des organes garantissant que les boulets tombent dans la bonne séquence.
Hawkins Samuel P.
Latiolais Burney J. Jr.
Lutgring Keith T.
Frank's International Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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