ICL-A Production Logging Tool

ICL-A

Induction Collar Locator

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.

Unlike conventional CCL magnetic collar locators, the ICL-A is independent of logging speed and even works while stationary.  Since it does not contain magnets there is no problem with sensitivity degradation caused from time or temperature and requires no special handling or safety concerns.  It works in either centralized or eccentered configurations.

The ICL-A will operate in all casing/tubing sizes although the response is best in casing sizes from 4 ½” to 9 5/8” and weights up to 35 lb/ft.  The small tool diameter allows it to pass through tubing as small as 2 3/8”.  Tubing joints are measured as well as casing collars through the tubing.

The ICL-A is available with either the CBG high speed digital telemetry or an analog, modulated current output.  In this configuration, the ICL-A can be run alone or more commonly with the analog output NGT-B gamma tool.  The CPT-B combo tool is required if the digital telemetry option is used.

ICL-A

Induction Collar Locator

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.

Unlike conventional CCL magnetic collar locators, the ICL-A is independent of logging speed and even works while stationary.  Since it does not contain magnets there is no problem with sensitivity degradation caused from time or temperature and requires no special handling or safety concerns.  It works in either centralized or eccentered configurations.

The ICL-A will operate in all casing/tubing sizes although the response is best in casing sizes from 4 ½” to 9 5/8” and weights up to 35 lb/ft.  The small tool diameter allows it to pass through tubing as small as 2 3/8”.  Tubing joints are measured as well as casing collars through the tubing.

The ICL-A is available with either the CBG high speed digital telemetry or an analog, modulated current output.  In this configuration, the ICL-A can be run alone or more commonly with the analog output NGT-B gamma tool.  The CPT-B combo tool is required if the digital telemetry option is used.

ICL-A Specifications

Mechanical Diameter (OD) 1 11/16”
Length (make-up) 24.0”
Weight 6.8 lb.
End Connectors GO Single Pin
Material Ti-6Al-4V Titanium
Performance Sensitivity/Range 2-3/4″ to 9-5/8″ casing; 0 – 35 lb/ft
Accuracy 1 lb/ft.
Resolution 0.1 lb/ft.
Environmental Operating Temperature 175°C (350°F)
Survival Temperature 204°C (400°F)
Pressure 15,000 psi
Power Requirements Input Voltage 46V-48V (Digital); 48V-200V (Analog)
Input Current 30mA
Output Signal Digital Telemetry or Modulated Current

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