G - Physics – 08 – C
Patent
G - Physics
08
C
G08C 23/00 (2006.01) E21B 47/12 (2012.01) E21B 47/18 (2012.01) G08C 23/02 (2006.01) H04B 13/02 (2006.01)
Patent
CA 2577582
A system and method in accordance with the invention communicate remotely with remotely controllable downhole tools in a well bore at a drilling installation. At the surface, high energy pressure impulses directed into the tubing or the annulus, or both, being at a level to propagate through an interface between very different impedances zones, such as an upper level gas zone and a lower level of mobile fluid media extending down into the desired downhole location. The pressure impulses, provided by directionally gating along the longitudinal confining path a pressure impulse initially having sharp leading and trailing edges, reach the downhole location as physical perturbations forming a discernible pattern that can be detected by one or more energy responsive transducers. With combinations of these signals, one of a number of separate control devices can be remotely actuated. The system avoids the need for physical or electrical connections and concurrently greatly reduces the likelihood of accidental operation.
Carstensen Kenneth J.
Marks & Clerk
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