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.

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.

A dynamic method is used to study PRD drill-in fluid and the formation time of filter cake on the core and flushing resistance of the filter cake to completion fluids.