pre-feasibility study of the 300–400 direct-burning conventional combustion power plant. In 1986, updated and expanded studies were ordered from Klöckner-Lurgi. In 1985–1986, Chinese oil company Sinopec carried out a test for processing El Lajjun oil shale utilizing the Fushun-type retort. Although this process was technically viable, the cooperation with Sinopec was halted due to high operation costs. B.B.C, Lummus/Combustion Eng. and Bechtel Pyropower carried out the CIDA and USAID funded study of utilizing Sultani oil shale for direct combustion in CFB power plants. The Krzhizhanovsky Power Engineering Institute (ENIN) conducted processing tests of Jordan oil shale using Galoter technology, finding the technology suitable. In 1999, Suncor Energy signed a memorandum of understanding with the Jordanian government to use the Alberta Taciuk Processing technology to exploit the El Lajjun oil shale deposit. However, the project was never implemented. Shale oil extraction In 2006–2007, the government of Jordan signed four memorandums of understanding for above-ground processing of shale oil and one memorandum for in-situ conversion processing. The memorandum of understanding with Estonian energy company Eesti Energia was signed on 5 November 2006. According to the agreement, Eesti Energia was awarded with the exclusive right to study about one third of the resources of the El Lajjun oil shale deposit. Later this right was transferred to cover a block on the Attarat Umm Ghudran oil shale deposit as the shallow aquifer that underlies the El Lajjun deposit provides fresh water to Amman and other municipalities in central Jordan. On 29 April 2008, Eesti Energia present a feasibility study to the Government of Jordan. According to the feasibility study, the company's subsidiary the Jordan Oil Shale Energy Company will establish a shale oil plant with capacity of . The shale oil plant will use an Enefit processing technology. The concession agreement was signed on 11 May 2010 in the presence of Jordanian and Estonian prime ministers Samir Zaid al-Rifai and Andrus Ansip. On 24 February 2007, a memorandum of understanding was signed with Brazil's Petrobras awarding with the exclusive right to study a block at the Attarat Umm Ghudran deposit. The development will be carried out in the cooperation with Total S.A. The company will present a feasibility study at the beginning of 2009 and it will use the Petrosix technology. In June 2006, a memorandum of understanding was signed with Royal Dutch Shell to test its in-situ conversion processing in the Azraq and