E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 31/113 (2006.01)
Patent
CA 2186201
A valve for a two way hydraulic drilling jar which includes a hollow cylindrical member having an exterior surface, an interior surface, a first end and a second end. At least one spiral-form fluid bypass passage is positioned in each of the first end and the second end of the cylindrical member. The at least one spiral-form bypass passages has a first end communicating with the exterior surface and a second end communicating with the interior surface.
Soupape de coulisse de forage à double effet. La soupape comprend un corps cylindrique creux présentant une surface extérieure et une surface intérieure, une première extrémité et une deuxième extrémité. Au moins un conduit de dérivation du fluide, de forme spirale, est placé à chacune des extrémités du corps cylindrique. Au moins un des conduits de forme spirale a une première extrémité communiquant avec la surface extérieure tandis que sa deuxième extrémité communique avec la surface intérieure.
A.t.k. Enterprises Inc.
Thompson Douglas B.
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