Saver sub

{
  "id": "MLC-T-OAG-003263",
  "term": "Saver sub",
  "field": "Oil and gas",
  "definition": "A short, sacrificial threaded adapter placed between the drill string and the kelly or top drive system. Its purpose is to protect the more expensive and difficult-to-replace threads of the kelly or top drive from wear and tear during repeated make-up and break-out operations. When the threads on the saver sub become worn, it can be easily replaced, extending the life of the primary drilling equipment.",
  "subject": "Drilling",
  "url": "https://mlchart.com/terminology/oil-and-gas/saver-sub/"
}