近几年来在取心作业中大量采用金刚石取心钻头。为保证金刚石钻头的安全使用和提高岩心收获率,对取心前井底干净提出了更高的要求。为此,我们设计了深井全遮盖打捞杯。它用于6 1/8″有8 1/2″ In recent years, coring in a large number of diamond coring bit. In order to ensure the safe use of diamond bits and increase the core yield, higher requirements are put forward for coring the bottom hole before coring. To this end, we designed a deep well-covered fishing cup. It is used for 6 1/8 “with 8 1/2”