ICL-B Casing Inspection Tool

ICL-B

ICL-AThe patented (US6,084,403) Induction Collar Locator tool is used to make depth corrections to logs by identifying the location of casing collars, including flush joints, and to inspect other mechanical features of the casing such as thickness variations or perforations.

The ICL-A uses a low-frequency induction method with a transmitter and two receiver coils arranged to provide an absolute phase measurement that senses the average thickness of metal around the tool, along with a two inch differential measurement to sense smaller details such as collars, casing centralizers and perforations or cracks in the casing.  The two different modes are only available simultaneously in the digital output version of the tool, when they are assigned to two channels of the telemetry frame.  In the analog version of the ICL-A, either collar locator or casing inspection must be pre-selected prior to operation.

The small diameter of the ICL compared to other Casing Inspection logging tools is a great advantage, because it is not necessary to pull tubing out of the well. This can be a great cost-saving. The graphs below show the tool response characteristic when used in the Casing Inspection mode and with the Digital Output option. The variation of digital data from the nominal value is plotted against casing weight. The second chart shows the effect of an additional outer casing.

ICL-B

ICL-AThe patented (US6,084,403) Induction Collar Locator tool is used to make depth corrections to logs by identifying the location of casing collars, including flush joints, and to inspect other mechanical features of the casing such as thickness variations or perforations.

The ICL-A uses a low-frequency induction method with a transmitter and two receiver coils arranged to provide an absolute phase measurement that senses the average thickness of metal around the tool, along with a two inch differential measurement to sense smaller details such as collars, casing centralizers and perforations or cracks in the casing.  The two different modes are only available simultaneously in the digital output version of the tool, when they are assigned to two channels of the telemetry frame.  In the analog version of the ICL-A, either collar locator or casing inspection must be pre-selected prior to operation.

The small diameter of the ICL compared to other Casing Inspection logging tools is a great advantage, because it is not necessary to pull tubing out of the well. This can be a great cost-saving. The graphs below show the tool response characteristic when used in the Casing Inspection mode and with the Digital Output option. The variation of digital data from the nominal value is plotted against casing weight. The second chart shows the effect of an additional outer casing.

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