Damage mechanism of upper exposed producing layers during CBM multi-coal seam development
Zhou Xiaozhi;Sang Shuxun;Yi Tongsheng;Jin Jun;Huang Huazhou;Hou Dengcai;Ao Xianshu;School of Resources and Geosciences;China University of Mining and Technology;Guizhou Research Center of Shale Gas and CBM Engineering Technology;Coal Mine Exploration of Guizhou Province;
Risk prediction of bit balling in gas drilling and its influential factors
Su Yinao;Chen Ye;Yan Tie;Sun Xiaofeng;Wang Limin;Wang Kelin;College of Petroleum Engineering;Northeast Petroleum University;Geological Brigade of the No.4 Oil Production Plant;PetroChina Daqing Oilfield Company;Oil and Gas Engineering Research Institute;PetroChina Tarim Oilfield Company;
Fracture control technology for the X80 large OD 1422 mm line pipes
Huo Chunyong;Li He;Zhang Weiwei;Yang Kun;Chi Qiang;Ma Qiurong;CNPC Tubular Goods Research Institute;State Key Laboratory for Performance and structure Safety of Petroleum Tubular Goods and Equipment Materials;