Analysis of Casing Side-drilling Technology in a Well in Bohai Oilfield

Abstract

In the offshore cluster pattern adjustment well operation, casing-opening sideslapping technology can save time and cost by using the original well groove and the old hole section. It has become one of the conventional means to tap the potential of the old well area. In casing-opening operation, the difficulty of milling 13-3/8 "casing is higher than that of other casing sizes. The main reason is that the wall thickness of casing and the window length are relatively long, and the wear of shoes in actual operation is also larger than other sizes. The 13-3/8 "casing window opening of Qikou 17-2-4DH1 well adopts Weatherford's new type of fast one-run window opening tool with carbon tungsten carbide cutting block for shoe grinding. Meanwhile, window opening parameters and window repairing parameters are optimized, so that the whopper, window opening and geological guide drilling can be mounted in one trip, and the passability of the window can be ensured. It provides an effective technical practice for the sidetracking of 13-3/8 "casing in the future.