An anti_whirl technology keeping the lateral forces and cutters balanced on PDC bit for slim_hole drilling is proposed.
针对小井眼PDC钻头的实际工作条件 ,提出了在小井眼钻井中具有普遍意义的PDC钻头的横向力自平衡抗回旋技术。
The intrinsic viscosity and the radius of gyration of polymers were studied in this paper,and t.
通过红外光谱分析、热分析、X射线衍射分析对接枝共聚物结构进行了验证,并对接枝共聚物特性黏数和大分子回旋半径进行了研究。
The radius of gyration(Rg) described quantitative network aggregation structure scales and polymerization.
应用X射线小角散射技术(SAXS)测定和研究了由溶胶凝胶法合成的CaO-Al2O3-SiO2系列(GCAS)低维硅酸盐分子网络的介观结构,研究结果表明低维硅酸盐分子网络的分数维值(D)定量反映了网络构象的蠕变特征,回旋半径(Rg)定量描述了网络团粒结构的尺度及其聚合程度,这些参数对低维硅酸盐材料的结构表征及其开发应用,提供了重要的理论依据。
For 6 commercial polymers of various molar mass,M,the root mean square values of radius of gyration in a simulation formation water of TSD=20 g/L are determined at 70℃ and,based on these values and a core permeability,K,vz throat radius median,R50,relationship published where else,it is concluded that a core of Ka=0.
实测了油藏温度下(70℃)相对分子质量M不同的6种聚合物,在矿化度20 g/L的模拟油田地层水中的分子线团均方根回旋半径,根据文献发表的渗透率Ka~孔隙半径中值R50关系,由这些回旋半径值判定,Ka=0。
Investigation in anti-whirl PDC bit.;
新型挠性抗回旋PDC钻头研究
Physical simulation on raceway size of blast furnace;
高炉回旋区大小的物理模拟
Gas-solid two-phase model of raceway considering particle influence on turbulence;
考虑颗粒对高炉风口回旋区湍流影响的气固两相模型
The research actualities and development foreground of the raceway of blast furnace;
高炉风口前缘回旋区的研究现状及发展前景