Coil Tubing
Coil tubing is a long, continuous length of steel or composite tubing that is stored on a large spool and can be pushed into and pulled out of a well without stopping. Unlike traditional tubing, which is made up of separate joints that must be connected and disconnected during use, coil tubing is seamless and does not require tongs, slips, or elevators for handling.
This technology allows operations to be done more quickly and safely, especially in live wells that remain under pressure. Coil tubing can be used for a variety of well intervention tasks, including cleanouts, chemical injections, perforation, and even drilling in certain cases.
The tubing is inserted through a special injector head that grips and moves the tubing in and out of the wellbore. The equipment also includes a pressure control system to prevent fluid or gas from escaping during the operation. Because the tubing is flexible, it can move through curves in the wellbore, including horizontal sections.
Coil tubing operations reduce the need for a full workover rig and are often faster and more cost-effective. However, operators must be trained in handling the equipment safely due to the high pressure and mechanical force involved.
Potential Hazards
- Pinching fingers and hands
- Being exposed to an unexpected release of pressure
- Getting struck by falling or shifting objects (such as suspended injector heads)
- Falling from heights
Possible Solutions
- Keep all fingers and hands away from pinch points (such as tubing spool, rollers, and injector head).
- Inspect the tools and equipment before use.
- Rig up boom trucks in accordance with manufacturer's recommendations.
- Use fall protection.
Knowledge Check Choose the best answer for the question.
6-11. According to the text, which of the following is a potential hazard while installing coil tubing on the well site?
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