Corrosion behavior of four kinds of S135 steel in polymer drilling fluids containing CO2 is investigated using high temperature high pressure autoclave.

84 g/cm~3) density are prepared from a blast furnace slag of a steel plant in Urumqi, commercial activator BAS-1 and dispersant MT-1 for MTC, and polymer drilling fluids taken at 5 drilling sites in Turpan-Hami oil fields are evaluated in laboratory for their performance properties at different temperatures, 65℃, 85℃, and 93℃.

Application of the inorganic-organic monomer polymer drilling fluid in Wenxin 99-1 well.;

Secondary organic cationic polymer drilling fluid technology;

A strong inhibition and plugging polymer drilling fluid system was optimized in laboratory for horizontal wells of Zhongyuan Oilfield,which were high-temperature,high-salt,sloughing,and circulation losing.

CPDF uses ligosulfonate mud in upper formation, and uses biopolymer mud in lower formation.

This paper evaluates the properties of available de-foamers for polymer mud using the density recovery ratio as an index.

Field application showed the good inhibition and cutting transportation capacity of polymer mud, and better high-temperature resistance and lubricity of the.

When a well drilling job is completed,the residual gelled PRD polymer drilling-in fluid in the bottom must be treated by a proper gel breaker(GB) to prevent from reservoir formation damage.