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CCL (Casing Colar Locator Tool)

Created by Arthur Aslanyan (Nafta College), last modified on Jul 15, 2018

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Downhole logging sensor locating the tuning or casing collars along the borehole

Log Name = CCL

Measured property = volume of magnetisable materials around the sensor

SI	Oil Metric	Oil Field
V	mV = 10^-3 V	mV = 10^-3V

Scope of Applicability

Depth Matching between cased-hole logs and well schematic based on location of tubing/casing collars
Locating the bottom of tubing
Locating the current bottom hole
Locating the perforation intervals
Locating the casing or tubing deformation

Mathematical Model

There are two modifications of the tool: CCL Passive and CCL Active

CCL Passive

$\begin{array}{l}\displaystyle CCL = k \cdot H \cdot LSPD\end{array}$

CCL Active

$\begin{array}{l}\displaystyle CCL = k H\end{array}$

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