Pressure and temperature compensation means for a downhole force

Details Pressure and temperature compensation means for a downhole force Pressure and temperature compensation means for a downhole force

1979-09-21

1981-05-19

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

7386239, E21B 4700

Patent

active

042677270

ABSTRACT:
In an apparatus for measuring the downhole force applied to a cable suspending a well-logging apparatus in a borehole, an elongated sensitive element has a strain gauge integrally bonded upon it for measuring the downhole force. The apparatus is provided with elements for compensating for pressure and temperature changes in the borehole, wherein an envelope is sealingly disposed about the strain gauge and is formed to allow the sides of the envelope to deflect inwardly and outwardly from the strain gauge in response to changes in pressure and temperature in the borehole. The envelope is filled with oil.

REFERENCES:
patent: 3327784 (1967-06-01), Pardue
patent: 3402601 (1968-09-01), Heineman
patent: 3497958 (1970-03-01), Gollwitzer
patent: 3567879 (1971-03-01), Dueker
Advertising Brochure: The CEC 1000 Sputtered Gage Pressure Transducer, CEC Division of Bell and Howell, Pasadena, Calif.

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