Platinum Resistance Tool

The Platinum Resistance Thermometer is used to give a high precision reading of wellbore temperature. It outputs temperature data as a digital word allowing for very high resolution. Because of the small size of the tip it also has a very rapid response time which minimizes the effects of differing line speeds. It can be run alone, or as part of a string of Production Logging tools.

OPERATING PRINCIPLE

The change of resistance of a length of platinum wire with changing well temperature is used to drive a voltage controller oscillator. The frequency output from the VCO is digitized and encoded on the line. The high thermal conductivity copper tip is isolated with a low thermal conductivity body which allows for high resolution measurement even with high differential temperatures between the well fluid and the tool body.

APPLICATIONS

Production and Injection Log Interpretation Location of Fluid Movement Behind the Pipe or Casing Location of Fluid Entry, Gas Leaks and Injection Zones Cement Top Determination INTERFACING & TOOL COMBINATIONS Simultaneous Operation with other Production Logging Tools Sondex Compatible and OPTIONS Ultrawire ™ toolbus (UW) or Memory toolbus (Mbus) Slickline memory or surface readout mode (with suitable telemetry controller)

SPECIFICATION

PRT Telemetry XTU or UMT Pressure(max) 105MPa

Temperature(max) 177°C

Measurement Range 10 – 177°C

Resolution 0.003°C

Accuracy 0.5°C

Linearity 0.15°C

Response Time <0.5 sec

Voltage(nominal) 18VDC

Current <24mA

Length 318mm

Measure Point 44mm

Diameter 43mm

Weight 4.5kg

Material Corrosion Resistance

Throughout End Thread(top/bottom) 13/16″ 12 UN2A

GO End connector(top/bottom) 4mm single banana connector