Casing collar locator (CCL)

{
  "id": "MLC-T-OAG-000559",
  "term": "Casing collar locator (CCL)",
  "field": "Oil and gas",
  "definition": "A downhole logging tool that detects the magnetic anomalies caused by the steel collars connecting sections of casing in a wellbore. This tool provides precise depth correlation, allowing operators to accurately position perforating guns, packers, and other downhole equipment. The CCL signal is typically recorded as a series of peaks corresponding to each collar.",
  "abbreviation": "CCL",
  "subject": "Perforating",
  "url": "https://mlchart.com/terminology/oil-and-gas/casing-collar-locator-ccl/"
}