Oil well sucker rod load measurement

Details Oil well sucker rod load measurement Oil well sucker rod load measurement

1990-08-20

1992-12-22

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

73581, 73597, E21B 4100, G01H 500, G01N 924, G01N 2918

Patent

active

051725916

ABSTRACT:
A load measuring system comprising an acoustic transmitting transducer for injecting an acoustic signal into a load bearing portion of a sucker rod, and receiving transducer for detecting the signal after it passes through a known length of a sucker rod, and a time delay detector for determining the travel time and in turn, the velocity of the acoustic signal. The acoustic velocity is measured in an unloaded portion of the sucket rod to provide a zero load reference. Measurements are then taken in the loaded portion of the rod and used to indicate dynamic load on the sucker rod string.

REFERENCES:
patent: 3720098 (1973-03-01), Dixon
patent: 3822587 (1974-07-01), Makino et al.
patent: 3943755 (1976-03-01), Arii et al.
patent: 3969810 (1976-07-01), Pagano

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