research on the heavy concrete technology expanded rapidly in the last decades. this kind of the concrete can be used for different purposes such as the protective shields of the medical centers and nuclear power plants. ilmenite, limonite, hematite, magnetite and barite are the common mineral aggregates which are used in the heavy concrete construction technology. in this research the mechanic...

Improved drilling and reservoir penetration efficiency is directly related to the quality of mud used. The right choice type its components will preserve formation productivity, stability well walls reduce probability other complications. Oil gas operators use barite, less often siderite or hematite weighting agent as a component in composition muds for conditions increased pressure. But these ...

Well-drilling fluid and a number of the known components (barite, clay, Aldacide, Surflo, and Dowicide, were tested for effects on the biomass and community structure of the microbiota that colonize marine sands exposed for eight weeks to running ambient seawater. Shading the microbiota from light depressed the microflora without a significant effect on the biomass, while well-drilling fluids l...

The rheological regulation of the “three high” (high temperature, high density and high salinity) water-based drilling fluid is a worldwide problem due to the combined influence of temperature, solid content and salinity. This paper investigates the factors and regulation methods about rheological property of “three high” water based drilling fluid, and the effects of clay, salinity and weighti...