CITM-A Casing Inspection Tool

CITM-A

Casing Inspection Thickness Measurement

CBG-5The CITM tool is used for inspecting water well casings from 12” to 30” diameter.  Based on the ICL-B Induction Collar Locator, the CITM is the only water well casing inspection tool capable of simultaneously measuring Casing Weight, Internal Casing Diameter, Collars, Centralizers, Perforations and Internal/External Corrosion.  During the casing inspection procedure, the CITM provides information on casing irregularities often missed by video surveys.

The CITM uses oscillating magnetic fields to set up and measure Remote Field Eddy Currents in the casing via a combination of transmitter and receiver coils at two separate frequency ranges.  For casing inspection, the phase shift is measured between a transmitter and receiver coil, operating at low frequencies of 10-30 Hz.  A differential phase measurement between the two receiver coils provides a highly resolved view of the casing wall thickness.

A high frequency signal of 50-100KHz is used to provide an amplitude measurement between the transmitted and received signal which provides the internal casing diameter or caliper.  The casing outside diameter can then be calculated using the wall thickness and ID measured values, providing a sectional view of the casing.

The CITM-A tool utilizes the inner tool and wireline telemetry technology developed in the CBG Production Logging system.  As such, the CPT-B, Combo tool must be connected to the top of the CITM-A.  With the addition of the Combo tool, a high-resolution (0.01psi) pressure sensor detects water contact and gas intrusion.   The additional high-resolution fluid temperature sensor detects inflows and cross-flows of water.

The CITM-B/CPT-B system is run in a well on a monocable wireline that supplies power and transmits data to the surface.  The Scientific Data Systems, Warrior Logging System supports these tools and produces industry standard log presentations of the sensor data.

CITM-B

A second generation version of the CITM is currently under development that will incorporate the features of the CPT-B Combo tool directly within the tool.  This will eliminate the additional cost and added weight and overall length of the tool.  Additional modification will reduce the weight even further.

CITM-A

Casing Inspection Thickness Measurement

CBG-5The CITM tool is used for inspecting water well casings from 12” to 30” diameter.  Based on the ICL-B Induction Collar Locator, the CITM is the only water well casing inspection tool capable of simultaneously measuring Casing Weight, Internal Casing Diameter, Collars, Centralizers, Perforations and Internal/External Corrosion.  During the casing inspection procedure the CITM provides information on casing irregularities often missed by video surveys.

The CITM uses oscillating magnetic fields to set up and measure Remote Field Eddy Currents in the casing via a combination of transmitter and receiver coils at two separate frequency ranges.  For casing inspection, the phase shift is measured between a transmitter and receiver coil, operating at low frequencies of 10-30 Hz.  A differential phase measurement between the two receiver coils provides a highly resolved view of the casing wall thickness.

A high frequency signal of 50-100KHz is used to provide an amplitude measurement between the transmitted and received signal which provides the internal casing diameter or caliper.  The casing outside diameter can then be calculated using the wall thickness and ID measured values, providing a sectional view of the casing.

The CITM-A tool utilizes the inner tool and wireline telemetry technology developed in the CBG Production Logging system.  As such, the CPT-B, Combo tool must be connected to the top of the CITM-A.  With the addition of the Combo tool, a high-resolution (0.01psi) pressure sensor detects water contact and gas intrusion.   The additional high-resolution fluid temperature sensor detects inflows and cross-flows of water.

The CITM-B/CPT-B system is run in a well on a monocable wireline that supplies power and transmits data to the surface.  The Scientific Data Systems, Warrior Logging System supports these tools and produces industry standard log presentations of the sensor data.

CITM-B

A second generation version of the CITM is currently under development that will incorporate the features of the CPT-B Combo tool directly within the tool.  This will eliminate the additional cost and added weight and overall length of the tool.  Additional modification will reduce the weight even further.

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