What Is Coiled Tubing Drilling Service (coiledtubingdrilling.com)?

Coiled Tubing Drilling Service is the directional coiled tubing drilling (DCTD) arm of AnTech, a UK-based innovation company. The site describes a complete DCTD service built around AnTech's proprietary COLT and POLARIS bottom hole assemblies (BHAs), covering project planning, tool and crew supply, and coordination with rig and fluid handling providers. It is aimed at operators who want to drill directionally or horizontally underbalanced — to tap existing reserves, improve reservoir productivity, or apply the same technology to geothermal, hydrogen, carbon capture and storage, and critical minerals drilling.

What the service actually covers

According to the site, AnTech positions this as an end-to-end offering rather than a tool rental:

• Project planning — working through the well programme before mobilisation.
• Liaison with third parties — coordinating with rig providers and fluid handling contractors.
• Tools and crew — supplying the downhole equipment and the people to run it.
• Directional and horizontal drilling — the core capability, performed underbalanced.

The stated commercial goal is to access untapped reserves and extend the productive life of mature wells.

The technology behind it

Two proprietary bottom hole assemblies are named on the site:

Both are described as AnTech's own designs. The site also lists supporting products and services that sit around the drilling operation — casing exit solutions, RockSense, ATLAS modelling software, drilling optimisation, and vibration modelling — which suggests the DCTD service is offered alongside a wider engineering toolkit rather than in isolation.

Where it is applied

The site frames CTD as suited to more than conventional oil and gas work. Named applications include:

• Mature field production — reaching reserves that conventional rigs cannot economically access.
• Geothermal — drilling for heat extraction.
• Hydrogen — drilling for hydrogen-related projects.
• Carbon capture and storage — well construction for CO₂ injection.
• Critical minerals — mining-related drilling.

This positioning reflects the broader energy transition market rather than a pure oilfield services focus.

Who the site is written for

The navigation splits its audience explicitly:

• Operators — pages explaining the benefits of CTD and where it can be applied to their wells.
• CT rig companies — material on why their customers should consider CTD and how to partner with AnTech, including converting a CT unit to e-line.

There is also a resources centre with industry case studies, a glossary, and useful links, plus a blog covering CTD and product topics.

What to check before enquiring

The site does not publish pricing, and no payment or booking platform is listed — the route in is an enquiry form. If you are evaluating whether this service fits a project, the practical starting points are the "Information for Operators" and "Information for CT Rig Companies" sections, and the case studies in the resources centre, which show where the technology has already been deployed. For anything project-specific — well conditions, underbalanced requirements, tool availability — you would need to contact AnTech directly, since those details are not covered on the public pages.