Reverse circulation junk basket
Full-flow reverse circulation junk basket is similar to standard reverse circulation junk basket and is also used to catch small junk down hole.The difference is that full-flow type has a valve structure that allows circulation through the center to keep out shale or debris while running in hole. A drain through the tool eliminates the possibility of pulling a wet string even though the inner barrel is plugged by the core.
Double stage junk catcher are used in each assembly.A lifting sub is provided for ease of handling which includes a storage space for the steel ball used in the operation of the tool. It is also converted into a fishing magnet by replacing the catchers with a magnet insert.
Alternate shoes available are the type B and type C. The type B and C mill shoe is similar in design to type A but dressed with tungsten carbide.