格瑞克中國有限責任公司是綠龍公司的子公司，作為母公司的綠龍公司是一家在英國倫敦證券交易所上市的國際公司。格瑞克是一家中國境內的燃氣供應商，專門從事于煤層中產出天然氣體（俗稱為瓦斯或煤層氣）的勘探、開發、生產與利用。
      公司的經營目標是強化集上、中、下游為一體的綜合開發程度。在中國，格瑞克與中聯煤層氣有限責任公司（一家從事煤層氣相關業務的國營企業）通力合作，雙方簽定了五個區塊煤層氣商業化開發的“產品分成合同”。格瑞克公司旨在通過其山西、江西、安徽貴州等四個項目（總面積為7589平方公里，預測氣體儲量為23.1萬億立方英尺）獲得其自有的煤層氣氣源。當前，第一批擁有5臺美國進口鉆機和150名專業技術人員的鉆井隊伍已組建到位，并在山西晉城沁水柿莊南區塊成功打出40余口煤層氣氣井，日采煤層氣超過2萬方。格瑞克計劃2010年在預測儲量4億立方米的晉城區塊，鉆探煤層氣氣井超過100口，采氣量達到10-20萬立方米。
        格瑞克將通過以CNG撬車為主，輸氣管道為輔的運輸形式將五個項目的煤層氣銷售給下游市場用戶。
        格瑞克根據其戰略性的商業發展計劃即發展為集上、中、下游為一體的燃氣供應商。格瑞克近期成功收購了鄭州沙口路汽車加氣站，并且正在運作收購新鄭機場、新鄭市、濟源市汽車加氣站的項目，格瑞克還參股了專業經營西氣東輸天然氣的中油恒燃石油燃氣有限公司，成功擁有了西氣東輸天然氣的經營權。格瑞克的商業戰略布局已經在北京、上海、河南、山西、安徽、江西等地區全面展開。
 
Introduction of Greka China
 
Green Dragon Gas is the parent company of Greka China, and is exclusively focused in gas industry in China. Green Dragon operates within China under its subsidiary Greka.
Green Dragon Gas is an international company listed on London Stock Exchange, and Greka (China) Co.,Ltd  is its subsidiary in China. Greka is a gas supplier based in China with a focus on the exploration, development, production, distribution and sales of natural gas from coal seam, commonly known as coal bed methane or CBM.
Greka holds the goal to increase the degree of vertical integration in its operation. In China, Greka entered into production sharing contracts for CBM development in its five blocks with CUCBM, a state-owned enterprise specializing in the niche oil and gas-related areas.
Greka generates its CBM supply from four projects in Shanxi, Jiangxi, Anhui and Guizhou provinces covering acreage of a total of 7,589  and an estimated 23.1 Tcf of Gas-in-place. By now, the first drilling team owing five technically advanced drilling rigs manufactured from the States and 150 technical personnel has already been completed. It has successfully drilled over 40 CBM wells in Qinshui Shizhuang South site in Shanxi,  which could produce over 20 thousands cube meters CBM per day. 
Greka plans to explore and drill over 100 CBM wells in Jincheng(with an estimated 0.4 billion cube meters of gas) by 2010 where the number of the produced gas would reach  thousands cube meters. 
Greka CBM distribution from these projects to customers is mainly in the form of Compressed Natural Gas(CNG) and to a lesser extent, via pipeline in the form of Piped Natural Gas(PNG).
Greka's strategic commercial development plan is to become a gas supplier combined with upstream, midstream and downstream. Recently, it has successfully purchased CNG service station in Shakou Road, Zhengzhou and is working on purchasing more stations in Xinzheng Airport, Xinzheng and Jiyuan cities. It has also been a member of  board of directors of  Petro China Hengren Petro-Gas Company which is specializing in " West-East natural gas transmission project " gas offer, successfully obtained the management right in the " West-East project " . 
Greka has fully spreaded  its commercial strategic layout in Beijing, Shanghai, Henan, Shanxi, Anhui and Jiangxi etc.