MLchartDataset catalogue

Collar locator

Term · Oil and gas · MLC-T-OAG-000748

A downhole wireline tool that detects the magnetic signature of casing collars, which are the threaded connections between individual joints of casing. The tool generates a signal at each collar, creating a log that provides an accurate depth reference within the wellbore. This casing collar locator (CCL) log is used to correlate depth with open-hole logs and to precisely position other tools, such as perforating guns or bridge plugs, relative to the formation.

Table 1. Record
IdentifierMLC-T-OAG-000748
FieldOil and gas
SubjectWell Completions
Record as JSON 
{
  "id": "MLC-T-OAG-000748",
  "term": "Collar locator",
  "field": "Oil and gas",
  "definition": "A downhole wireline tool that detects the magnetic signature of casing collars, which are the threaded connections between individual joints of casing. The tool generates a signal at each collar, creating a log that provides an accurate depth reference within the wellbore. This casing collar locator (CCL) log is used to correlate depth with open-hole logs and to precisely position other tools, such as perforating guns or bridge plugs, relative to the formation.",
  "subject": "Well Completions",
  "url": "https://mlchart.com/terminology/oil-and-gas/collar-locator/"
}

Record 805 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.