The logging instruments 2109 and 2155 (Dresser-Atlas,USA) consistmainly oftwo coils,a radiator and a receiver,coaxially winded and fittedup a given distanceapart.When they work in the casing of an oil well,the phase o...The logging instruments 2109 and 2155 (Dresser-Atlas,USA) consistmainly oftwo coils,a radiator and a receiver,coaxially winded and fittedup a given distanceapart.When they work in the casing of an oil well,the phase of the signal received notonly depends on the thickness of the casing,but also on its electromagnetic perform-ance.Therefore,the instrumenscan usually be used to qualititively estimate the thick-展开更多
A chromizing coating was formed on P110 oil casing tube steel (P110 steel) via pack cementation to improve its performance and increase the lifetime during operation. The slurry erosion behaviors of the P110 steel sub...A chromizing coating was formed on P110 oil casing tube steel (P110 steel) via pack cementation to improve its performance and increase the lifetime during operation. The slurry erosion behaviors of the P110 steel substrate and the chromizing coating were assessed in a liquid-solid two-phase flow condition. The results showed that the obtained coating exhibited higher surface hardness, lower mass loss, and lower slurry erosion rate than those of P110 steel. The chromizing treatment has significantly improved the surface hardness and slurry erosion resistance of P110 steel.展开更多
文摘The logging instruments 2109 and 2155 (Dresser-Atlas,USA) consistmainly oftwo coils,a radiator and a receiver,coaxially winded and fittedup a given distanceapart.When they work in the casing of an oil well,the phase of the signal received notonly depends on the thickness of the casing,but also on its electromagnetic perform-ance.Therefore,the instrumenscan usually be used to qualititively estimate the thick-
基金supported by the National Natural Science Foundation of China (Grant No. 51171125)the China Postdoctoral Science Foundation(Grant No. 2012M520604)+1 种基金the Youth Foundation of Taiyuan University of Technology (Grant No. 2012L050)the Foundation for Talents Introduction of Taiyuan University of Technology (Grant No. tyut-rc201157a)
文摘A chromizing coating was formed on P110 oil casing tube steel (P110 steel) via pack cementation to improve its performance and increase the lifetime during operation. The slurry erosion behaviors of the P110 steel substrate and the chromizing coating were assessed in a liquid-solid two-phase flow condition. The results showed that the obtained coating exhibited higher surface hardness, lower mass loss, and lower slurry erosion rate than those of P110 steel. The chromizing treatment has significantly improved the surface hardness and slurry erosion resistance of P110 steel.
