Top cement + Bottom expansion packer segmented transformation technology
Description of Technology :
One trip run into of tubing string can meet the needs of top tubing cementing and open hole segmented fracturing.
Configure drillable ball seat fracsliding sleeve can achieve internal cleaning and ball seat grinding be completed simultaneously after construction is done.
The upper part of cementing sliding sleeve is provided with a sealing mechanism to ensure the wellbore's integrity of the fracturing string during fracturing.
Oil and water expansion packers can assist cementing and sealing to prevent cement slurry contamination and late layer formation.
The structure of tubing string:
Tubing string +Tie back sealing tubing string + Cement hydraulic control sleeves + Expansion Packer +SF fracsleeve + Hydraulic control sleeve + Inflation sub + Float collar + Float shoe
Seal bore extension+ Tie back sealing insert.