Casing Inspection Tools

The patented (US6,084,403) Induction Collar Locator (ICL) tool is used in casing inspection procedures to make depth corrections to logs, by identifying the location of casing collars, including flush joints. CBG’s casing inspection logging tools are also used to inspect other mechanical features of the casing such as thickness variations or perforations. Please see Induction Collar Locator (ICL) in our Wireline Logging products section for more information.

The Casing Inspection Thickness Measurement (CITM) tool is used for inspecting water well casings from 12” to 30” diameter.  Based on the ICL, 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.  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 patented (US6,084,403) Induction Collar Locator (ICL) tool is used in casing inspection procedures to make depth corrections to logs, by identifying the location of casing collars, including flush joints. CBG’s casing inspection logging tools are also used to inspect other mechanical features of the casing such as thickness variations or perforations. Please see Induction Collar Locator (ICL) in our Wireline Logging products section for more information.

The Casing Inspection Thickness Measurement (CITM) tool is used for inspecting water well casings from 12” to 30” diameter.  Based on the ICL, 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.  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.

CITM

The CITM tool is used for inspecting water well casings from 12” to 30” diameter.

MWD Tools | CITM | Gamma Ray Logging | Gamma Sensors

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