Thermal indicator for wells

Patent · 01 January 1983

OSTI ID:864595

Bak, Chan S ^[1]

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1. Newbury Park, CA

Minute durable plate-like thermal indicators are employed for precision measuring static and dynamic temperatures of well drilling fluids. The indicators are small enough and sufficiently durable to be circulated in the well with drilling fluids during the drilling operation. The indicators include a heat resistant indicating layer, a coacting meltable solid component and a retainer body which serves to unitize each indicator and which may carry permanent indicator identifying indicia. The indicators are recovered from the drilling fluid at ground level by known techniques.

• Research Organization: Spectro-Systems, Inc., Springfield, VA
• Assignee: Spectro-Systems, Incorporated (Oakton, VA)
• Patent Number(s): US 4390291
• OSTI ID: 864595
• Country of Publication: United States
• Language: English

Related Subjects

/374/73/116/
carry
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coacting
component
drilling
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durable
dynamic
employed
fluid
fluids
ground
ground level
heat
heat resistant
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indicating
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layer
level
measuring
meltable
minute
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permanent
plate-like
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recovered
resistant
retainer
serves
solid
solid component
static
sufficiently
techniques
temperatures
thermal
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unitize