E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/05 (2006.01)
Patent
CA 2274256
An apparatus for launching at least one plug into a tubular in a wellbore, said apparatus comprising a hollow upper section and a hollow lower section, said hollow upper section comprising at least first and second upper ports (12, 13) longitudinally spaced therein, said second upper port (13) being disposed above said first upper port (12), a landing seat (7) between said hollow upper section and said hollow lower section, and a fluid displaceable member (4) retained below said second upper port (13), said hollow lower section adapted to retain at least one plug (8) and comprising at least a first lower port (10) thereabove and a landing collar (6) for said fluid displaceable member (4), the arrangement being such that in use, when the apparatus is installed at the top of a liner and lowered into a wellbore, and a dart lands on said landing seat (7) blocking said first upper port (12) a fluid pressure differential can be created about said fluid displaceable member (4) through said second upper port (13) which displaces said fluid displaceable member (4) to said landing collar (6), allowing a fluid pressure differential about said plug through said first lower port (10) to launch said plug.
La présente invention se rapporte à un appareil destiné à lancer au moins un bouchon à l'intérieur d'un tubulaire situé dans un puits et qui se compose d'une section supérieure et d'une section inférieure creuses. Ladite section supérieure creuse se compose d'au moins un premier et un second orifice supérieur (12, 13) espacés longitudinalement. Ledit second orifice supérieur (13) est disposé au dessus dudit premier orifice supérieur (12), et un siège de réception (7) est situé entre lesdites sections supérieure et inférieure creuses. Un élément mobile fluidique (4) est maintenu en dessous dudit second orifice supérieur (13), ladite section inférieure creuse étant prévue pour maintenir au moins un bouchon (8); elle comprend au moins un premier orifice inférieur (10) sur le dessus et un tubage de réception (6) pour ledit élément mobile fluidique (4). La disposition est telle que pendant l'utilisation, quand l'appareil est placé au sommet d'un tube puis abaissé à l'intérieur d'un puits, et qu'un clapet atterrit sur ledit siège de réception (7) bloquant ainsi ledit premier orifice supérieur (12), un différentiel de pression fluidique peut être créé au niveau de l'élément mobile fluidique (4) traversant ledit second orifice supérieur (13) qui déplace ledit élément mobile fluidique (13) jusqu'au tubage de réception (6), permettant ainsi au différentiel de pression fluidique au niveau dudit bouchon traversant ledit orifice inférieur (10) de lancer ledit bouchon.
Gudmestad Tarald
Salte Jone
Lucas Brian Ronald
Marks & Clerk
Weatherford/lamb Inc.
LandOfFree
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