E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 23/00 (2006.01) E21B 19/00 (2006.01) E21B 19/10 (2006.01) E21B 41/00 (2006.01)
Patent
CA 2058315
A housing, having at least a top wall and a spaced parallel bottom wall, has aligned openings in the top and bottom walls and a path extending between the aligned openings. The housing is mounted over a well bore so that the openings are aligned with the well bore. In the housing are a pair of blocks which are pivotable from an open position, in which the path is cleared, to a closed position, in which the blocks extend across the path. Wire line tools are mounted through the housing into the bore and thence into the well. When the tools are raised from the well, the blocks are in their closed position whereby to prevent the tools from falling back into the well should the wire break.
Structure comportant au moins une paroi supérieure et une paroi inférieure parallèles, les deux percées d'une ouverture, les deux ouvertures étant alignées et communicantes. La structure est montée sur un puits de forage de manière à ce que les trous soient alignés avec le puits. Dans la structure se trouve une paire de blocs qui, déplacés selon un mouvement pivotant, ouvrent ou ferment le passage entre les ouvertures. Des outils suspendus à un câble électrique passent à travers la structure et descendent dans le puits. Lorsque les outils sont remontés du puits, les blocs se trouvent en position fermée, ce qui, en cas de rupture du câble, empêche les outils de retomber dans le trou.
Frontier Oilfield Sales Ltd.
Ridout & Maybee Llp
LandOfFree
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