Up-hole pump-in core barrel apparatus

Details Up-hole pump-in core barrel apparatus Up-hole pump-in core barrel apparatus

E - Fixed Constructions

21

B

E21B 25/02 (2006.01) E21B 23/08 (2006.01)

Patent

CA 2370918

The drilling apparatus includes a wire line core barrel head assembly having a latch body seatable on a drill string landing shoulder and retainable in a latch seated position by a latch assembly spring urged to a latch seated position, fluid seals on the latch body to facilitate fluidly propelling the head assembly in an upward direction, valve mechanism in a latch body bypass channel to restrict fluid flow therethrough to provide a signal of the latch body seating on the landing shoulder and then opening together with being retractable to an open position by a latch retractor prior to the latch body being retracted and second valve mechanism to block axial outward flow in the bypass channel. The fluid seals are mounted to a latch body adaptor that may be removed to convert from an up-hole to a down-hole assembly.

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