Atlantis Deepwater Technology Holding AS is an offshore technology company located in Grimstad, Norway. Atlantis represents a novel method for exploration drilling and field development in deep and ultra deep waters, and may contribute to considerable cost savings to the oil companies operating in deep-water areas.

The basic principle of the concept is to use an artificial buoyant seabed for installation of subsea systems. The artificial buoy, which is installed at a “shallow” depth of approximately 200-300 meters below sea surface, replaces the functions of the real seabed thus no equipment remains on the seabed. A tieback of the first casing in the well is used as anchoring for this “new seabed”.

In October 2001 the concept was included in the Norwegian technology program "Demo 2000" (organized under the Oil & Energy Department), which was the breakthrough for the technology. The Atlantis Demo project, which includes fabrication and testing of a full-scale prototype unit, was funded by the Demo program, BP, Shell and Atlantis Deepwater Technology.

Atlantis Deepwater Technology Holding and China Oilfield Services Limited have entered into an agreement for use of the Atlantis deepwater technology in upcoming deepwater exploration activities in China and other South-East Asia Pacific countries, including Australia. Under the terms of the agreement, China Oilfield Services Limited and Atlantis Deepwater Technology will complete the construction and commissioning of the first fully operational Atlantis unit for offshore applications.