TPi November 2016

products & developments

Protection of the connection One of most important considerations for any corrosion-resistant piping system is protection of the connection area. Duoline Technologies manufactures a metal wire reinforced nitrile elastomer ring for API connections. This reinforced elastomeric corrosion barrier ring (CBR) is compressed between the liners in the connection make-up process. The compressed CBR is held in place by the liner, preventing passing fluids from causing coupling failure. annular space under pressure using a tightly controlled process. The Duoline process does not depend on bonding or adherence of the liner to the steel pipe wall. This benefit, combined with the high hoop strength of the GRE liners, provides a resilient lining system for high-pressure gas service or water systems with high CO 2 or H 2 S content.

performance in specific applications. The Duoline liners offer solutions to most downhole environments, from shallow brine water disposal wells to deep-hot- gas production in both onshore and offshore wells. The company manufactures a metal wire reinforced nitrile elastomer ring for API connections; a fibreglass reinforced PTFE ring is available for premium gas tight connections. Duoline Technologies recommends the presence of a trained Duoline technician when Duoline is installed or repaired at the well site. Qualified technicians are available around the world. In addition, a number of service companies have technicians who have been trained by Duoline Technologies to run or repair Duoline.

Whether the job calls for new steel tubing with premium gas tight connections or reclamation of used tubing with API type threads, Duoline can be applied to meet a wide range of applications and customer needs. As well as being used in CO 2 injection and water flood injection fields, deep gas production and gas- lifted oil production wells have been a target application for use of the Duoline lining system. Duoline Technologies has installed Duoline in over 100 million feet of tubing.

When corrosion starts in downhole tubing, the string soon fails. The result is downtime and increased operation costs for workovers and tubing pulls. Duoline ® is claimed to stop corrosion where alternative lining or coating systems soon fail. The process of inserting a rigid plastic liner sleeve inside the pipe eliminates the ‘holiday’ potential created by IPC coating processes. A grouting layer of cement material is placed in the

Duoline Technologies – USA customerservice@duoline.com www.duoline.com

Duoline Technologies offers several liner selections that match material

Silva Mash EOOD is a specialist in the production of precision and high-tensile electro-welded tubes according to standard EN 10305.

The company manufactures CRC from HRC – both low- and high-tensile strength.

Silva Mash EOOD – BULGARIA

Lovech 5500 . 1, Gurko Street . BULGARIA . Tel.: 00359 68 601581 . Fax: 00359 68 601583 . silva@mbox.digsys.bg

46

Tube Products International November 2016

www.read-tpi.com