公开(公告)号：US4208665A

公开(公告)日：1980-06-17

申请号：US944966

申请日：1978-09-22

Applicant: Manuel D. Mills

Inventor： Manuel D. Mills

IPC: E21B43/12 ,  G01D9/16 ,  G01L3/00 ,  G01D9/00

CPC classification number: G01L3/00 ,  E21B43/127 ,  G01D9/16

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 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.

Abstract translation: 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。