Dynamometer for monitoring sucker rod strings

Details Dynamometer for monitoring sucker rod strings Dynamometer for monitoring sucker rod strings

G - Physics

01

D

234/6

G01D 5/00 (2006.01) E21B 43/12 (2006.01) E21B 47/024 (2006.01) G01D 9/16 (2006.01) G01L 3/00 (2006.01)

Patent

CA 1127128

MANUEL DEE MILLS DYNAMOMETER FOR MONITORING SUCKER ROD STRINGS ABSTRACT A dynamometer for monitoring the tension in a pair of spaced, elongated members. A pen, actuated by a sensor means, measures the tension in the pair of spaced, elongated members, and places indicia upon a continuously moving chart. The indicia is related to the magnitude of the measured tension and is in the form of spaced-apart, individual curves or plots. Hence the pen contacts the chart for a first time interval; and thereafter, the pen is lifted from the chart for a second time interval so as to cyclically place the indicia upon the chart at successive inter- vals of time. More specifically, the dynamometer measures the tension in a rod string. The rod string is reciprocated by a pumpjack unit located above the ground and drives a downhole pump. The dynamometer therefore cyclically measures the pumping charac- teristics of the well at successive, predetermined intervals of time and provides a permanent record which can be stored and sub- sequently consulted in order to determine the characteristics of the entire pumping unit over a projected interval of time. -1-

336225

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