Research Of Middle-long Barrel Coring Technique And Core Treatment Technique

Middle-long barrel boring technique and core treatment technique is the most widely applied Technique in the world at present.The combination of both them can achieve high efficient coring operation and get the accurate core date.It has a huge advantage in the reducing of the cycle of coring operation,the reducing of the drilling cost and the improving of the efficiency of core processing analysis.This topic aim at the international advanced middle-long barrel coring technique and core treatment technique,make the systematic researching and projecy demonstration at the characteristics of the middle-long barrel coring tools,the strength and stability of the coring barrel and inner tube,the theory of gamma scanning technique and other key technologies.The high strength coring tool barrel and aluminum tube are designed and developed.The strength of the coring tool barrel is calculated and checked.Three different kinds of high-performace PDC coring bit for different formation are designed and developed.The relevant tools are optimizated designed and tested.Completed the researching of the core gamma scanning instrument and the relevant auxiliary tools and technique.To summarize the processing of the middle-long barrel coring operation and core treatmenting operation,we get the impeccable technological process of middle-long barrel coring operation.The middle-long barrel coring technique in this topic has completed more than 30 wells field application at home and abroad.The total coring footage is 5083.66 m,the total core length is 4849.85 m,the average recovery is 95.4%.The core gamma scanning instrument has completed more than 2000 m coring scanning operation and it has a good performance on the comprehensive property and accuracy.The methods and efficiency of coring operation has been improved,so it can provide powerful guarantee for getting the core data,and has greatly increased the benefit of oil and gas exploration and development.