 The HLAPC was also the only coring tool to successfully recover unconsolidated sands from the Bengal Fan (Expedition 354) and in other environments where the lithology has proven difficult to recover using either the APC or extended core barrel (XCB) tools.Deep sediment holes, including those that penetrate basement rock below sediments, traditionally have required pre-drilling a deep hole and installing double and triple casing strings to stabilize the upper hole, requiring as long as 7–10 days.Starting in 2014, the approach of drilling-in a single casing string and reentry system with a mud motor and underreamer without pre-drilling a hole has resulted in casing the upper part of a hole in a shorter time (3–4 days).