Study On Key Technology Of Extended-reach Wells Drilling Technology In Jailing Block

Large displacement horizontal well drilling technology and its related technology,offshore oil development in the countries all over the world,has a very broad application prospects.At present,the sea has been found more than one hundred oil field construction and oil and gas fields,about half of reserves of less than 10 million tons of small marginal oil and gas fields,so if the big displacement well drilling technology,the ability to this kind of oilfield development effectively,and can save oil field a lot of development costs,for fast and efficient development of reserves and marginal small fault block oilfield oilfield provides an effective way,therefore has wide application prospect.However,in the application process of large displacement Wells technology,due to the effect of drilling area of special environment,lead to big displacement well drilling technology can't achieve the desired effect.At first,this paper probes into the key technology of highly-displacement well,after the friction torque of large displacement Wells are analyzed,the friction torque is obtained under different working conditions of the recursive formula for computing,and through the large displacement Wells annulus fluid mechanics theory,the big displacement well borehole cuttings start speed and start stress,and drilling fluid rheological property is studied through laboratory experiments on the effect of cutting start speed in the wellbore,and the influence of cuttings in suspension speed impact factors,combined with the main technical points of the large displacement Wells water-based drilling fluid,the drilling fluid properties are analyzed on this basis,the construction of highly-displacement well in liaohe oilfield BiJiaLing areas difficult problem,namely water infiltration and deflecting difficult problems,cutting back out of the difficult problems,balling,friction and the problems of large torque,three open issues and casing drilling with rock does not reach the designated position problem combined with the actual situation,has carried on the solution,for the application of technology in BiJia Ling highly-displacement well to provide a theoretical basis and practical guidance.