Coiled Tubing (CT) is a versatile and efficient intervention technique widely used in oil & gas wells without the need for a full drilling rig. Here’s a simplified step-by-step workflow of a typical CT operation:
- Job Planning & Risk Assessment
Define objectives (cleanout, nitrogen lift, logging, stimulation), review well data, pressures, and HSE requirements. - Rig-Up & Equipment Preparation
Mobilize CT unit, injector head, reel, control cabin, pressure control equipment (stripper, BOPs), and pressure test all components. - Well Control Setup
Install and test CT BOP stack and stripper to ensure safe operations under live well conditions. - Running in Hole (RIH)
Inject coiled tubing into the well while monitoring depth, weight, pressure, and pump rates in real time. - Downhole Operation
Perform the planned task:
• Well cleanout
• Nitrogen lift
• Logging
• Acidizing or stimulation
• Scale or sand removal - Pulling Out of Hole (POOH)
Retrieve the CT while maintaining pressure control and monitoring returns. - Rig-Down & Post-Job Evaluation
Safely rig down equipment, analyze data, and document job performance and lessons learned.
Key Advantages of Coiled Tubing:
• Operates in live wells
• Faster and cost-effective
• Minimal footprint
• Reduced formation damage
Coiled tubing is not just an intervention tool — it’s a smart solution for modern well optimization.