Hardware
Solid rod for near-surface obstructions. NanoCoil for circulation, displacement, chemical injection, liquid plugs, and pipe-in-pipe replacement — 2–3 mm access across extended well geometries. Both run under full pressure control. Neither needs a drilling rig.
NORSOK Z-015. ATEX Zone 1. Developed with NORCE and Innovation Norway. Built by HYTECH.
Two services
Slick-line access
Typically 7–8 days
A four-person team on the platform. Drift to depth, evaluate, broach obstructions, restore use of the control or injection line.
Circulation & replacement
Typically two weeks
Pressure-rated 1.5–2 mm access for circulation, displacement, liquid-plug placement, and pipe-in-pipe replacement of a leaking line.
Envelope
In the well
Hydraulic control-line tubing is typically 3.6 mm inside diameter, with wraps and bends that reject conventional coiled tubing. NanoCoil is 1.5–2 mm, pressure-rated, and built to carry treatment fluids through that geometry — including a pipe-in-pipe left in a leaking line.
Sequence
Enter the existing line
Solid rod or NanoCoil is connected to the control or injection line already in the well. No production tubing retrieval. Other production on the platform continues.
Navigate the geometry
The string passes tight radii and directional changes inside a 3.6 mm line — the restriction that stops conventional coiled tubing.
Circulate and confirm
Pressure-controlled circulation and displacement at depth: debris recovery, diagnostic confirmation, then targeted treatment or plugging.
Restore or abandon
Bring a safety valve back, leave a pipe-in-pipe, or place a liquid plug — then demobilise. The well stays in the Opex column.
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