Wireline steel tailored for ultra-deep, sour service

A new steel has been developed by Sandvik Steel to meet the demanding requirements of wireline applications.

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Sandvik Steel wirelines are used for lowering tools and instruments in deep oil and gas wells.
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A new steel has been developed by Sandvik Steel to meet the demanding requirements of wireline applications. Sandvik Sanicro 26 MO was launched in January this year to create a wire that contains high levels of molybdenum and nitrogen, giving it exceptional strength and corrosion resistance. Sandvik has developed the new metal to meet the needs of well service companies working in sour wells at depths greater than ever before.

First deliveries of the new wire have been made to Lee Tool, part of Schlumberger, which was recently appointed as the company's distributor in Canada. Sandvik Steel has also established a distributorship with Aberdeen-based Grampian Test and Certi fication.

All Sandvik wireline products are cold worked from metal rods manufactured in their own foundry. The cold working process ensures that the wire retains its high strength and the use of its own metals gives Sandvik greater control over quality and production. The new Sandvik Sanicro26 MO is available in weld-free lengths up to 10,000 meters and in sizes up to 3,17mm (0.125-in.).

The wirelines that Sandvik supplies to the offshore industry are used for lowering tools and instruments in deep oil and gas wells. The wirelines must offer the following:

  • High corrosion resistance in the presence of chlorides and hydrogen sulfide at high temperatures
  • Possess high mechanical strength
  • Be weld free to ensure uniform tensile properties.

The new Sandvik Sanicro 26 stainless steel alloy joins five other Sandvik wireline steels and will replace many of the materials being used by the industry today.

A major part of the company's output is in the manufacture of cold worked production tubing which is supplied to match the sour conditions

of a specific well. The duplex SAF 22 Chrome material for medium sour wells accounts for a significant part of the company's output, together with the high alloy Sandvik Sanicro 28, which is suitable for severe conditions with high H2S content.

Sandvik can also supply stainless steel coiled tubing which is used in different subsea applications such as umbilicals, flowlines, risers, and different downhole applications. The tubing is joint welded and supplied on reels in lengths up to 25 km, with internal diameters up to 3-in. This February, Sandvik completed the final consignment of deliveries of 33 km of 2-in. ID SAF 2507 tubing for the service lines for the Elf Explo ration Angola/Girassol project riser towers and sealine bundles. The tubing was supplied as joint welded and polypropylene-coated seamless super duplex stainless steel tubing on reels.

For more information contact Lena Berg, Sandvik Steel, Tel: +46 26 31 11, Fax: +46 26 26 40 80, Email: lena.berg@sandvik.com

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