E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/16 (2006.01)
Patent
CA 2236715
A plug launching device for use in cementing operations in the construction of oil and gas wells, said plug launching device (3) comprising a tubular member having an upper section (4) and a lower section (5) which can accommodate at least a bottom plug (10) and a top plug (11), characterised in that said upper section has a floor (6) and said lower section is movable relative to said upper section (5), the arrangement being such that, in use, when a first dart (27) is pumped into said upper section (4) by cement said cement is diverted to raise said lower section (5) to release said bottom plug (10) and when a second dart (30) is pumped into said upper section (5) by hydraulic fluid it lands on said first dart (27) and said hydraulic fluid is diverted to raise said lower section (5) further to release said top plug (11).
Dispositif de lancement de bouchon (3) destiné aux opérations de cimentation lors de la construction de puits de gaz et de pétrole, comportant un élément tubulaire avec une section supérieure (4) et une section inférieure (5) sur laquelle peuvent s'adapter au moins un bouchon inférieur (10) et un bouchon supérieur (11). Le dispositif est caractérisé en ce que ladite section supérieure comporte un plancher (6) et ladite section inférieure peut se déplacer par rapport à ladite section supérieure (5). La configuration est telle qu'à l'utilisation, quand un premier clapet (27) est envoyé par pompage dans ladite section supérieure (4) par du ciment, ledit ciment est dévié de façon à soulever ladite section inférieure (5) et à libérer ledit bouchon inférieur (10), et quand un second clapet (30) est envoyé par pompage dans ladite section supérieure (5) par un fluide hydraulique, il atterrit sur ledit premier clapet (27) et ledit fluide hydraulique est dévié de façon à soulever encore davantage ladite section inférieure (5) et à libérer ledit bouchon supérieur (11).
Marks & Clerk
Weatherford/lamb Inc.
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