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EnglishWhat Are the Benefits and Applications of Coiled Tubing Drilling (CTD)?
Updated
Coiled Tubing Drilling (CTD) is a drilling method that uses a continuous coiled tubing string instead of jointed pipe to drill directional and horizontal wells, including underbalanced drilling. According to AnTech's Coiled Tubing Drilling Service (coiledtubingdrilling.com), the main benefits are the ability to drill directional and horizontal wells while drilling underbalanced, access existing reserves, and increase reservoir production productivity. It suits operators working mature fields, and it is also positioned for energy-transition applications such as geothermal, critical minerals, hydrogen, and carbon capture and storage.
What CTD Is
AnTech describes its offering as a complete Directional Coiled Tubing Drilling (DCTD) service built around its proprietary COLT and POLARIS Bottom Hole Assemblies (BHAs). The service covers project planning, liaison with rig and fluid handling providers, and supplying the tools and crew to complete the job.
Two terms matter here:
- Directional CTD (DCTD): drilling wells that deviate from vertical, including horizontal sections.
- Underbalanced drilling: drilling with the wellbore pressure kept below the formation pressure, which the site presents as a core capability of the service.
Benefits
Based on the service description, the stated benefits are:
| Benefit | What it means in practice |
|---|---|
| Directional and horizontal wells | You can drill well paths that vertical drilling cannot reach |
| Drilling underbalanced | The service is designed to operate under underbalanced conditions |
| Access existing reserves | CTD can be used to tap into reserves that are already identified |
| Increased production productivity | The stated goal is improving how productively reservoirs produce |
The site also frames CTD as a way to maximize the life of wells when production must come from mature fields — a common situation as fields age and easier reserves are depleted.
Applications
The service page groups applications into two broad areas.
Mature fields and existing reserves
Operators facing declining or hard-to-reach production can use CTD to access untapped reserves and extend well life. This is the traditional driver: getting more out of fields that are already developed.
Energy transition
AnTech states that CTD technology is "ideally suited" for:
- Geothermal applications
- Mining for critical minerals
- Drilling for hydrogen
- Carbon capture and storage (CCS)
The logic is that these applications often involve drilling into formations where the CTD advantages — directional control and underbalanced capability — are useful.
Who the Service Is For
The site separates its audience into two groups:
- Operators — directed to a page explaining the benefits of using CTD on their wells and where it can be applied.
- CT rig companies — directed to information on why their customers should consider CTD and how to partner with AnTech. There is also a page on converting a CT unit to E-line.
Where to Learn More
The site provides dedicated Benefits and Applications pages, plus a Resources Centre containing industry CTD case studies, a glossary, and useful links. For a specific project, the site offers an enquiry route rather than published pricing; no pricing or payment details appear in the available material, so cost and commercial terms would need to be requested directly.
If you are evaluating CTD for a particular well, the practical next step is to compare your well conditions — mature field versus energy-transition target, vertical versus directional or horizontal need, and whether underbalanced drilling is required — against the benefits and applications pages, then contact the service provider with those specifics.