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    • 14. 发明授权
    • Dynamometer for monitoring sucker rod strings
    • 用于监测抽油杆串的测功机
    • US4208665A
    • 1980-06-17
    • US944966
    • 1978-09-22
    • Manuel D. Mills
    • Manuel D. Mills
    • E21B43/12G01D9/16G01L3/00G01D9/00
    • G01L3/00E21B43/127G01D9/16
    • 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 intervals 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 characteristics of the well at successive, predetermined intervals of time and provides a permanent record which can be stored and subsequently consulted in order to determine the characteristics of the entire pumping unit over a projected interval of time.
    • 一个测力计,用于监测一对间隔细长的构件的张力。 由传感器装置致动的笔测量一对间隔的细长构件中的张力,并将标记放置在连续移动的图表上。 该标记与所测量的张力的大小有关,并且是间隔开的单独曲线或曲线的形式。 因此,笔与第一时间间隔接触图表; 此后,将笔从图表提升第二时间间隔,以便以连续的时间间隔将标记循环地放置在图表上。 更具体地,测力计测量杆串中的张力。 杆串由位于地面上方的泵送单元往复运动,并驱动井下泵。 因此,测力计循环地在连续的预定时间间隔周期性地测量井的泵送特性,并且提供可以被存储和随后查询的永久记录,以便在预计的时间间隔内确定整个泵送单元的特性。