Ensuring Safe Perforation Well Operations with Check Fire Procedures

Posted on by Crissa Fel Tawadan

In wireline and perforating work, safety is not optional—it’s a necessity. The use of wireline perforating guns and perforating systems in cased hole well services comes with risks that require strict adherence to safety standards. One of the most crucial procedures in perforation well operations is the check fire procedure, especially when using RED detonators.

Why a Check Fire Procedure Matters in Wireline Perforating

During a wireline perforating job, we cannot afford uncertainties when handling perforating guns or downhole tools. The check fire procedure ensures that:

  • The firing system is working correctly before arming explosives.
  • The shooting voltage meets the required all fire voltage of 250 VDC.
  • The safety of personnel and equipment is maintained throughout the wireline well logging process.

Step-by-Step Guide to the Check Fire Procedure

To execute a check fire safely, we follow a structured process that eliminates risks and ensures reliable performance.

1. Preparing for the Check Fire

  • Inspect the rigging area and confirm the crew is ready.
  • Ensure that no personnel is in contact with the wireline unit or firing head.

2. Conducting the Fire Check

  • The Field Engineer issues the command: “Stand by to check fire.”
  • The operator confirms readiness: “Ready to check fire.”
  • Engineer commands: “Check fire open.”
  • Operator verifies that the cable is open circuit, acknowledging with “Open.”
  • Engineer applies firing power and checks for an open circuit on the shooting panel.

3. Confirming the Voltage and System Readiness

  • The operator attaches a Blasters Multimeter to the cable head and CCL.
  • Engineer applies positive and negative polarity shooting voltages.
  • The system must read at least +250 VDC and -250 VDC, ensuring proper firing voltage.
  • The engineer then switches to the CCL monitor position and confirms: “Check collars.”

4. Ensuring the System is Safe

  • If all checks pass, the safety key is removed from the shooting panel.
  • The engineer exits the unit with the safety key and announces: “Fire OK, Collars OK, Cable is shorted.”
  • If any issue is detected, corrective actions are taken, and the check fire procedure is repeated.

Key Takeaways for Safe Wireline Perforating

  • The check fire procedure ensures that wireline perforating guns and perforating systems operate safely.
  • Strict adherence to step-by-step voltage verification prevents misfires in cased hole logging.
  • The process enhances well integrity and minimizes risks during wireline and perforating operations.
  • Wireline control systems should be tested before every job to maintain complete wireline solutions.

By implementing this structured approach, we safeguard wireline services oil and gas operations and ensure precision in perforation well execution.