DRILLING FLUID TECHNIQUE IN THE WELLS OF DUAL CASINGS IN JINGQIU AREA

This paper introduced the mud technique in dual casing well in Jingqiu area of North China oil field. The dual casings have been adopted to prevent casing from collapsing by creeping formation with plastic salt lime. The formations and dual casing technology require mud has the properties with anti-sticking, stabilization of borehole and anti-pollution of electrolyte. For the purpose,PAC141-NPAN-SMP polymer mud systems were selected.