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Maxtube’s DUOLINE® products offer an unsurpassed record for prevention of corrosion in very demanding conditions.

Maxtube’s DUOLINE® products offer an unsurpassed record for prevention of corrosion in very demanding conditions. DUOLINE is an internal lining system produced by inserting a rigid plastic tube inside steel tubing and filling the annular space with a mortar. Ends of the liner are flared to give a square shoulder. This provides a landing area for the corrosion barrier ring in the coupling. DUOLINE stops corrosion where other systems fail! Result: Bottom line savings through fewer well interventions. When corrosion starts in downhole tubing, the string soon fails. The result is downtime and increased operation costs for workovers and tubing pulls. DUOLINE stops corrosion where alternate lining or coating systems soon fail.

Applications

CO2 Injection Wells (WAG)
Oil and Gas Producing Wells
Waterflood Injection Wells
Brinewater/Chemical Disposal Wells
Transportation Pipelines
Sour Gas Service
Geo Thermal wells
Carbon Capture & Storage (CCS)

Potable Lining Units

Potable Lining Units With the creation of the MaxTube Portable Lining Unit, MaxTube have made the lining process completely mobile. Whereas other coatings and linings can only be applied/inserted at specific/selected sites, MaxTube can carry out the lining process almost anywhere.

Duoline Technologies offers a variety of liner selections that match material performance in your specific application. DUOLINE 10, DUOLINE 20 and ADVANCED DUOLINE LINER SYSTEMS offer solutions to nearly all downhole environments from shallow brine water disposal wells to deep-hot-gas production in both onshore and offshore wells.

DUOLINE® 10-PE

DUOLINE® 10-PE, is a lining system which utilizes a heavy wall high density polyethylene liner and is targeted for use in specific applications for reduction of tubing corrosion in low temperature & low pressure environments. DUOLINE® 10-PE is especially suited for shallow water injection well tubing where corrosive water is injected and performs within a temperature range of -20°F + 160°F.

DUOLINE® 10 BEATING THE HIGH COST OF CORROSION

DUOLINE® 10 is part of the unique Duoline process of inserting liner tubes into steel pipe and filling the annular space with a special cement applied with pressure. Ends are flared back so that both ends are flat and can be protected in the collar. Thus, the interior of the pipe is essentially inert to common acids and corrosive fluids.

DUOLINE® 10 also provides reliable joint protection. The lining is positioned on the pin and collar end of threaded pipe so that the collar is protected from corrosion when corrosion barrier rings are used. Smoothness is ensured by the fact that the interior of the liner is unaltered during the lining process, thereby retaining the ‘C’ factor of 150.

DUOLINE® 20

DUOLINE® 20, manufactured by Maxtube’s Duoline Technologies, is a filament-wound Glass-Reinforced Epoxy (GRE) liner which is installed to OCTG in corrosive service. It is widely accepted that GRE lining is a more robust alternative to internal plastic coating. DUOLINE® 20 is a very effective corrosion barrier with a long history of tubular protection in a variety of offshore and land based applications.

DUOLINE® 20 has an outstanding performance history in environments containing produced fluids and gasses with CO2 and H2S. DUOLINE® 20 has successfully prevented corrosion in gas production wells with BHT as high as 292°F (144°C), and is typically used in water injection and gas production service up to 284°F (140°C) depending on well conditions.

DUOLINE® 20 has proven to be the most abrasion resistant coating or lining product in downhole wireline trials in deviated wells. It is acid compatible, impact resistant, resistant to gas service failures common to other coatings or linings, premium connection compatible, chemically resistant and tolerant to common tension and bending loads.

Liner Completions