Measuring and testing – Borehole or drilling – Downhole test
Patent
1981-04-29
1983-05-03
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
E21B 4706
Patent
active
043816673
ABSTRACT:
A borehole survey tool of the type having a chamber for receiving a borehole survey instrument, and a shock absorbing assembly for supporting the survey instrument in the chamber, said shock absorbing assembly including a substantially helical return spring, and wherein there is provided elements for measuring borehole temperature comprising a maximum temperature registering thermometer mountable within a casing, the casing having a body portion and a shoulder portion, the casing being mountable in the borehole survey tool with the body portion received within the helical spring and the shoulder portion interposed between the survey instrument or an element of the survey tool and the adjacent end of the helical spring.
REFERENCES:
patent: 2222829 (1940-11-01), Humason et al.
patent: 2879666 (1959-03-01), Brown
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