Madden Systems Geothermal PLT Page 1 of 2

http://www.maddensystems.com/geo_plt.htm 12/14/03

This tool was developed for the Geothermal Industry and Scientific Communitysurveillance of steam wells used in the generation of electricity. We have succelogged wells with a bottom hole temperature of over 650 degrees F. This type oextremely demanding and must be taken very seriously. This is not a good senequick call job.

There is a significant effort involved in properly defining test objectives, equippreparation, and determining the most cost effective method of data acquisitionleast economic exposure to us and the client. Each job must be considered uniqextreme environment in which this tool is designed to operate.

The Geothemal Tool crosses over nicely into the world of oil & gas for logginghostile of environments. It contains all the sensors our other Slicklogger systthe exception of a capacitance (dielectric) probe. However, it is rarely needed iapplications at its designed temperature range. The Delta Pressure calculations fluid identification in that realm.

While the tool has the capability to be run as a memory tool , it is most often usline in a surface readout configuration.

Tool Diagram

Madden SystemsGeothermal Production Logging Tool

Tool Length Memory Configuration 16' 4" E-Line Configuration 10' 5"

Tool O.D. 1.77"

Pressure Sensor Type: Quartz Crystal Accuracy: 0.03% F.S. Resolution: 0.01 psi Ranges: 10k, 16k, 20k Make: Quartzdine

Temperature (Borehole) Rating: 650 degrees F Type: Platinum RTD Accuracy: 1 Deg. C. Resolution: 0.001 Deg. C. Response: 0 - 100 Deg. C (4 seconds)

Madden Systems Geothermal PLT Page 2 of 2

http://www.maddensystems.com/geo_plt.htm 12/14/03

Home Page Equipment Page Production Logging Page Standard Slicklogger - 285o F Hazardous Conditions Slicklogger - 450o F

Madden Systems Incorporated

Temperature (Compensation) Accuracy: 1 Deg. C. Resolution: 0.01 Deg. C.

Optional Gamma Ray Detector Type: Scintillation

Collar Locator Type: Coil / Rare Earth Magnet

Flow Meter (Spinner) Type: Continuous Sensors: Reed Switch / Magnetic Resolution: 0.25 rps or 0.08 rps Data Status: Velocity / Direction / Diagnostics

Output Logging Curves

Gamma RayCollar Locator

PressureTemperatureFlow Velocity

Pressure GradientTemperature Gradient

Compensation TemperatureLine Speed

Time and Depth

Onboard diagnostics record systems failures to allow compensation of data while logging at these extremely high temperatures. This gives us a quality control base to cross reference acquired data to downhole events, rather than possible tool problems.