Thermal indicator for wells

Patent · Tue Jun 28 00:00:00 EDT 1983

OSTI ID:7255293

Gaven, Jr, J V; Bak, C S

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 co-acting 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. 8 figs.

• Assignee: Spectro-Systems, Inc., Oakton, VA (United States)
• Patent Number(s): US 4390291; A
• Application Number: PPN: US 6-215085
• OSTI ID: 7255293
• Resource Relation: Patent File Date: 10 Dec 1980
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
DRILLING FLUIDS
ADDITIVES
TEMPERATURE MEASUREMENT
HEAT RESISTANT MATERIALS
PERFORMANCE
PHASE CHANGE MATERIALS
WELL DRILLING
DRILLING
FLUIDS
MATERIALS
422000* - Engineering- Mining & Underground Engineering- (1980-)
440800 - Miscellaneous Instrumentation- (1990-)