Measurement of borehole temperature
OwnerThomas L. Gordoninventor
Life of this patent
Estimating the term…
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.
Claims8
A borehole survey tool of the type having a chamber, a borehole survey instrument in said chamber, and a shock absorbing assembly for supporting the survey instrument in the chamber, said shock absorbing assembly including a substantially helical return spring for exerting a biasing force on said survey instrument, and wherein there is provided means for measuring borehole temperature comprising a casing defining a passage, a maximum temperature registering thermometer mountable within said casing passage, said casing having a body portion and a shoulder portion, said casing being mountable in the borehole survey tool casing with the body portion received within the helical spring and the shoulder portion being engaged with one end of said helical spring.
Dependencies are inferred from the claim text.