Boots – shoes – and leggings
Patent
1984-02-13
1986-06-10
Harkcom, Gary V.
Boots, shoes, and leggings
364506, 417 18, 324339, 346 33WL, 166 53, 166250, G06F 1520, F04B 4900
Patent
active
045946655
ABSTRACT:
Apparatus for detecting fluid pound in a sucker-rod oil well, using values of sucker-rod position and of sucker-rod load to calculate a reference position and a selected load value. The apparatus continually updates the reference positions and selected load values to compensate for drift in characteristics of transducers used in determining rod load and rod position and for a gradual change in well characteristics. When the sucker-rod moves downward to the updated reference position, the actual rod load is checked against the updated selected value and a warning signal develops when the amount of load exceeds the updated selected value.
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patent: 3951209 (1976-04-01), Gibbs
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patent: 4508488 (1985-04-01), Pikna
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Chandra Rangasami S.
Eineichner Donald E.
Lastra Jorge E.
Quen Stephen G.
FMC Corporation
Guernsey Lloyd B.
Harkcom Gary V.
Stanley Henry M.
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