Abstract The study uses chemical and mineral admixtures to understand the critical processes affecting cement slurry characteristics, including rheological properties, free water, compressive strength, thickening time. Using alternate replace partially has environmental economic benefits. mechanisms behind effects of on parameters were investigated at different temperatures using cutting-edge e...

The damage of cement slurry to the reservoir is directly related production oil and gas wells, a problem that must be solved for efficient economic development reservoirs. According characteristics field conditions caused by slurry, this paper analyzes main factors affecting degree damage, puts forward technical index requirements evaluation device, establishes method in case loss injection. re...

This paper looks at the reasons for and results of vertical integration, with specific regard to its possible effects on market power as proposed in the theoretical literature on foreclosure. It uses a rich plant-level data set of cement and ready-mixed concrete producers that spans several decades to perform a detailed case study. There is little evidence that vertical foreclosure effects are ...

We present the results of displacement flows different Newtonian and Herschel–Bulkley non-Newtonian fluids in a new-developed eccentric Hele–Shaw cell with dynamic similarly to real field wellbore annulus during primary cementing. The possibility tracking interface between using particles intermediate or neutral buoyancy is studied. behaviors movements sizes densities against vertical flow stro...

The article presents the results of research on influence enzymatic and oxidizing agents polymers used in drilling mud technology. calcium hypochlorite, urea peroxide, sodium persulfate, amylase cellulase. This allowed us to determine optimal concentrations these order reduce rheological parameters muds. ability enzymes oxidants decompose colloids composition muds was determined basis measureme...

It is difficult to obtain high quality samples of natural material covering a range of densities and degree of cementation, so study on the sample preparation techniques with similar mechanical properties of natural samples are very important. Experiments were carried out to study the effects of cementation of different materials on the mechanical properties of calcareous sand, e.g., the effect...