Figure 3. Industry drilling envelope (after Robertson, 2006). In 2006 Exxon drilled well Sa-15 in Sacate Field from Platform Heritage in Pescado Field, with a departure of 29,719 feet and a TVD of 7659 feet, which is the North American record for extended reach drilling and among the top ten wells worldwide (Figure 4.1). A well in BP’s Wytch Farm Field in the UK reached within less than 2000 feet of a seven-mile departure.