Hinged strain cell mounting apparatus

Details Hinged strain cell mounting apparatus Hinged strain cell mounting apparatus

1985-09-06

1987-02-24

Kreitman, Stephen A.

Measuring and testing

Borehole or drilling

Downhole test

73781, 338 6, G01L 122

Patent

active

046447857

ABSTRACT:
Apparatus for removably connecting a strain cell to a polished rod of a well pumping unit and for preventing the development of strain cell output signals due to bending of the polished rod. The strain cell is connected to a frame member which can be clamped to the polished rod where strain cell output signals are obtained due to a change in tensile load on the rod. A pair of hinges, between the frame member and the polished rod, minimizes the development of strain cell output signals due to bending of the polished rod. The frame member can be adapted to mount on a variety of sizes of polished rods. The apparatus can be removed or replaced without the use of special skills or special equipment.

REFERENCES:
patent: 2085687 (1937-06-01), Peters
patent: 2151728 (1939-03-01), Baker
patent: 3599479 (1971-08-01), Kutsay
patent: 3729985 (1973-05-01), Sikorra
patent: 3965736 (1976-06-01), Welton et al.
patent: 3985025 (1976-10-01), Osmond
patent: 4090405 (1978-05-01), McKee

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