Wiper plug delivery apparatus

Details Wiper plug delivery apparatus Wiper plug delivery apparatus

E - Fixed Constructions

21

B

E21B 33/12 (2006.01) E21B 23/00 (2006.01) E21B 23/04 (2006.01) E21B 33/16 (2006.01) E21B 37/00 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2376445

An apparatus and method for delivering a liner wiper plug into a well bore on a workstring with a liner pipe, releasing the wiper plug from the workstring, and giving a positive indication of release of the wiper plug. A sleeve captures a collet to a latch ring until a plug is pumped down the workstring to cause a pressure buildup, which shears a shear screw, allowing the sleeve to shift, releasing the latch ring and the wiper plug from the workstring. A rupture disk is provided in the event of jamming of the apparatus, to allow pressurization above the wiper plug, shearing a weak link in the latch ring to release the wiper plug.

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