Abstract: Along with the progress of oil well drilling technology,the work conditions for oil tubing/casing are increasingly critical.In this case,API tubing /casing thread connections can no longer satisfy the requirements for some oil/gas wells,and therefore the application scope of the premium thread connections are being expanded.In China the development of such premium thread connection is right now at an initial stage.Summarized here in the paper is the situation of domestic production/application of tubing/casing with premium thread connection.The existing problems concerning domestic application and development of premium threads are discussed,and some proposals are made.