Primary Cementing Equipment Performance Saves Operator About $1 Million

Operator's Challenge

A Gulf of Mexico operator traditionally had difficulty getting shoe tests in the Mississippi Canyon area and needed a more dependable approach. The well to be cemented was being drilled in over 5,300 ft of water. Casing was 13⅜ in and was run to just below 7,800 ft in a 17½-in hole. Mud weight was 9.35 ppg.

Halliburton's Solution

After working closely with the operator to review the well conditions, a Halliburton/Ray Oil Tool team developed a shared technology package. The Ray Oil Tool centralized shoe uses a Halliburton 4¼-in Super Seal II™ valve with API Class II C-rating and is capable of a 25 BPM rate. This centralized float shoe was used with a Halliburton NR™ nonrotating float collar with top and bottom plugs. The cement job was pumped at 11 BPM. After WOC, the float equipment and 50 ft of shoe joint were drilled out in three hours without problems. The casing seat tested to a 11.5 ppg mud weight equivalent.

Economic Value Created

According to the operator's Drilling Supervisor, the combined technology contributed to a flawless primary cement job. Because the operator was able to set the 13⅜-in casing at a greater depth, a planned casing string was eliminated. Also, a planned side track proceeded quicker because it was unnecessary to cut and pull casing to change direction. The operator estimated that total savings amounted to about $1 million in materials and rig time.