Analyses were done on the factors affecting the quality of the adjustment wells,such as hole enlargement,mud properties,density of cement slurry,pore pressures of the formations and the flow velocity of the .

Design and application of high density cement slurry in Shengtuo region;

Study and application of low density cement slurry for Jilin oilfield.;

A floating sphere composite low density cement slurry system was developed in lab.

Meanwhile, an early strength, gas channeling prevention in low temperature cement slurry system was manufactured used microsphere low density cement slurry as.

An ultra-low density cement slurry design principle is given in this paper.

In-doors simulated experimental study on mechanical damage mechanism of mud density on fractured reservoir;

According to the theory of fluid mechanics and by the use of established the Bernoulli equation,the author has in more detail analyzed the absorbing height of slime pump,and indicated that the real absorbing height is related to the negative pressure value and mud density of the pump.

The state key scientific＆ technological achievement of the“ Eighth Five－ Year－ Plan”─“ SDM－ 2 Type Sand Content Rapid Measurement System” was applied for site measurement and determination of overflow mud density of trailing suction hopper dredger.

Application of low density and high strength cement slurry technology in Tuha oilfield.;