Downhole clock spring
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United States of America Patent
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-
May 12, 1987
Grant Date -
N/A
app pub date -
Nov 13, 1985
filing date -
Nov 13, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A downhole clock spring in the form of an elongate ribbon comprising means connecting one end to a mandrel for driving an escapement, means connecting the other end to a case, the ribbon spring being characterized in that the ribbon is split substantially along the length thereof.
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