Surface Zero Discharge High Efficiency Drilling Technology in Oilfield A

In offshore oil fields, open circuit drilling mode is usually used in the surface layer. However, with the increasingly severe environmental protection, more and more oil fields are facing the test of zero rock debris discharge. To solve the problem of complete recovery of surface rock debris, a closed circuit wellhead needs to be installed on the surface, while the installation of conventional closed circuit wellhead is difficult and ineffective. Based on the summary and analysis of the difficulties and characteristics of surface closed-circuit drilling operation, this paper has developed the surface quick installation wellhead, combined with the optimization of surface borehole size and the transformation of drilling fluid system, realized the rapid disassembly of surface closedcircuit wellhead, the source reduction of drilling cuttings, zero dummy trip, and improved the surface drilling efficiency. The successful practice of surface zero discharge and high efficiency drilling technology provides a technical reference for subsequent surface operations.