Downhole Thermocouples

285°C Type K Thermocouples.

Type K Thermocouples are the most robust and reliable solution for temperature measurement in high-temperature reservoirs.

A Breakthrough In Reliability

In 2010, we developed an exclusive manufacturing process that has greatly increased the reliability of thermocouples. We did this by eliminating many of the weak points of a traditional thermocouple system. Our thermocouples offer superior performance for use in downhole steam-assisted gravity drainage (SAGD), enhanced oil recovery (EOR), geothermal, and other high-temperature applications.

Superior Tensile & Crush Ratings

Utilizing the same innovative technology as our 4m TEC Cable, our thermocouple instrumentation lines offer superior performance. Our tensile operating strength is double that of MICA cable. And our crush resistance is more than 250% better than traditional MICA lines.

MICA Free

By using a special form of perflouorokoxy (PFA) as insulation in place of MICA, we see several benefits. It provides a safe operating temperature of nearly 300°C/572°F. And the absence of MICA means that there is no longer the same threat of moisture wicking or corrosion that makes deployment and servicing so costly.

Splice Free

Our thermocouple cables are made in continuous splice free lengths of up to 4,000m. This is in contrast to MICA cables which can usually only be made to a maximum of 250m before requiring a splice. With a traditional MICA cable these splices can result in damage which will cause it to provide false readings, or early failure. By minimizing splices with our PFA cable we are able to increase reliability and makes deployment and servicing much quicker, and more cost-effective.

A Breakthrough In Reliability

Superior Tensile & Crush Ratings

MICA Free

Splice Free

Our thermocouple cables are made in continuous splice free lengths of up to 4,000m. This is in contrast to MICA cables which can usually only be made to a maximum of 250m before requiring a splice. With a traditional MICA cable these splices can result in damage which will cause it to provide false readings, of early failure. By minimizing splices with our PFA cable we are able to increase reliability and makes deployment and servicing much quicker, and more cost-effective.

MICA vs. Perflouorokoxy (PFA) Insulation

MICA

MICA insulation offers excellent temperature ratings, however it is susceptible to moisture wicking and can be difficult to use. Excess humidity can lead to sensor failures, and MICA insulation is difficult to strip and make reliable terminations in the field. In addition, poor brazing technique or even bending of the armor of MICA cables cause attenuation, resulting in early failures or inaccurate/drifting temperature readings.

Perflouorokoxy (PFA)

GEO PSI thermocouple systems use a special form of perflourokoxy (PFA) as insulation. It has a safe operating temperature of nearly 300°C/572°F, and is much easier for crews to work with. No soft leads are required at the termination, making our solution quicker to deploy and more cost effective to service in the field.

Duplex Temperature Points

We are able to install a redundant thermocouple sensor at each measurement point. This is beneficial for data backup and results verification. Alternatively thermocouples can be spaced apart for distributed temperature measurement.

Pump Down/Pull Through System Advantage

Because our thermocouples are not externally attached, there is no change to the outside diameter of the instrumentation cable. This is convenient when deploying pump down bundles in coiled tubing deployments. We can fit more measurement points in smaller-diameter, coiled tubing strings.

Filler/Safe-Handling Section

Thermocouples are typically installed in bundles or attached to sheath membranes for pump down purposes. To avoid damage from handling or banding, we have developed a 1-2m safe handling section at the end of our instrumentation cable. This greatly reduces any wear or tear when pulling instrumentation bundles into coiled tubing.