Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent
1984-05-01
1989-07-04
Steinberger, Brian S.
Communications: electrical
Wellbore telemetering or control
Pulse or digital signal transmission
340856, 166 651, 166206, 324367, G01V 100, E21B 47022
Patent
active
048454940
ABSTRACT:
Method and apparatus for transmitting data uphole in a well to the top of the well. A string of electrically conductive tubing and a tool connected to the tubing are lowered down the well along the inside of tubular shaped electrically conductive casing for the well. The inside of the casing is electrically contacted with an electrical contact carried by the tool. A switch in the tool is operated for alternately electrically connecting and disconnecting the contact and thereby the casing and with respect to the conductive tubing for changing the electrical conductance between the tubing and the casing representative of data. The changing conductance is interrogated with an alternating current, formed at the top of the well, to recover the data.
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Hanson Merle E.
Titchener Paul F.
Comdisco Resources, Inc.
Steinberger Brian S.
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