EnCana is presently using the 4 1/2" WellSeal Tool to hold their cement tops in place.
Gulf and Conoco
Gulf and Conoco have used the WellSeal Tool to help prevent cement fall off in the Red Earth Creek and Zama areas. The Tool works great in this application.
Husky Oil
Husky Oil ran sixty four (64) 7" Tools inside 9 5/8 casing in an area where they were experiencing one vent leak in five new completions. After running the WellSeal Tools they had no vent leaks. 100% successful.

Cement Enhancement Tool Case Studies