E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/12
E21B 7/04 (2006.01) E21B 7/06 (2006.01) E21B 17/10 (2006.01) E21B 21/10 (2006.01) E21B 33/127 (2006.01) E21B 34/10 (2006.01) E21B 43/112 (2006.01) F16K 17/30 (2006.01)
Patent
CA 1248936
The company called: SMF INTERNATIONAL Device for the remote actuation of an appliance associated with a duct in which an incompressible fluid circulates, particularly advice for actuating a stabilizer of a set of drill rods ABSTRACT Of THE TECHNICAL CONTENT OF THE INVENTION The device has, inside a duct (11) through which flows an incompressible fluid, a first profiled throttling element (17), a differential piston (10) subjected on one side to the pressure upstream of the profiled element (17) and on the other side to the pressure reduced by the element (17), a profiled surface (18) on the piston on the side subjected to the reduced pressure and a second profiled element (16) which are intended to interact to reduce the passage of fluid as a result of the movement of the piston in a first direction and increase the loss of head substantially, and a spring (15) returning the piston (10) in its second direction of movement. The device can serve particularly for actuating a stabilizer of a set of drill rods. In this case, the differential piston has inclined slopes. Figure 1a
499081
Boulet Jean
Cendre Andre
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Smf International
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