The LL type reverse circulation junk basket is used to retrieve all types of small junk objects such as cone′?cutter′?hand tool and Junks from the bottom hole.During drilling operation′?it produces a local reverse circulation of fluid at well core so as to effect a complete recovery of Junk in the junk basket Especially when PDC bit is used′?cleaning bottom well by the tool becomes very necessary to ensure the bit with a normal application.The reverse circulation Junk basket therefore becomes an essential tool in oil′?geology exploration and drilling engineering.
