Downhole signal conveying system

Wells – Processes – With indicating – testing – measuring or locating

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166 651, 73151, 3408533, E21B 4700

Patent

active

054563160

ABSTRACT:
Actuation of downhole tools is accomplished by inducing motion in the wireline. The downhole tool monitors such motion for predetermined patterns. Detection of a predetermined pattern actuates performance of a desired function. The pattern selected is sufficiently unique to avoid random or premature actuation. The tool may thus be actuated using ordinary nonconducting cable. In like fashion the tool can transmit stored information to the surface by a mechanical means such the resonant frequency of a mechanical signal in the cable.

REFERENCES:
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patent: 5293937 (1994-03-01), Schultz et al.
patent: 5361838 (1994-11-01), Kilgore
SPE No. 27601--"Monobore Completions for Slimhole Wells", by C. E. Robinson, Halliburton Energy Services, 1994.
Slick Line Tools, Inc. Catalog, "Slick Line Firing Device and Freepoint Indicator to Run On Solid Non-Conductor Line", date unknown, (8 p).
Petroleum Engineering Services Limited, "Time Delay Initiator", date unknown, (1 p).

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