STRING AND KEY TOOLS FOR LAYERED UNIFORM INJECTION WITH HIGH EFFICIENT HEAT INSULATION PERFORMANCE IN HEAVY OIL THERMAL RECOVERY WELLS

INTRODUCTION

These tools are mainly used in CSS, displacement, SAGD process to realize wellbore high insulation, separate layer steam injection and homogeneous heat injection of horizontal well. The tools can also improve the thermal effect and oil formation development of the thermal recovery wells.

FEATURES

◎ Overall heat insulation grade is D or above;

◎ Downhole tools have heat insulation function;

◎ Temperature rating 350℃ ;

◎ Separate injection can be achieved;

◎ Uniform heat injection for horizontal wells can be achieved；