Whipstock casing installation advances well construction

A technological breakthrough in well construction was achieved in the deepwater Gulf of Mexico. An 113/4-in, outer diameter (OD) liner was installed successfully through a whipstock window cut in 13 5/8-in, casing. This was the first documented attempt to run casing larger than 10 3/8-in. OD through a 13 5/8-in, window.