DEDICATED PERFORATABLE NIPPLE WITH INTEGRAL ISOLATION SLEEVE

摘要

DEDICATED PERFORATED NIPPLE WITH INTEGRAL ISOLATION SLEEVE A production nipple is suspended within an uncased bore hole in a slimhole/monobore completion. A deposit of cement is conveyed through the nipple and is spotted in the annulus across the face of the uncased well bore, with the nipple and cement deposit thereafter being perforated by a small diameter perforating gun. The production nipple has a thin walled section which is characterised by reduced resistance to perforation by a shaped explosive charge. The perforating gun is accurately positioned in registration with the dedicated nipple section by an annular locator slot formed on a coupling sub, which is engageable by a resilient latch arm carried by the perforating gun.