CASE STUDY Increasing the number of centralizers per joint can dramatically improve rotation at TD
To successfully rotate the liner while cementing in the horizontal section using 5 1/2” casing in an unfriendly drilled manner for casing running with mud issues.
Centek’s centralizer programme recommended 3 centralizers per 2 joints to ensure:
- a high stand-off ratio
- centralized casing
- reduced torque
- minimal casing sag
Although there were unrelated mud issues to resolve that had a big impact on casing running for the first well, the casing was successfully rotated at 60rpm when on bottom at 16,676ft.
"It was like having ball bearings in the hole!" Operator Engineer