Patent ID: 6769489
Filing Date: 2004-08-03
Classification: E21B

Abstract:
A well stimulation tool for stimulating a well having a tubing head spool and a production tubing suspended from a tubing hanger in the tubing head spool, comprising:an adapter spool having a bottom flange adapted for connection to one of the tubing head spool and a blowout preventer mounted to the tubing head spool, and a top end adapted to receive a mandrel that can be reciprocally moved through packing that surrounds the mandrel and is retained in a packing cavity in the top end, the top end further including threads for securing a lockdown nut that covers the packing and surrounds an outer periphery of the mandrel; the mandrel having a mandrel top end and a mandrel bottom end, the mandrel top end having a flange adapted for the connection of a high-pressure valve, and the mandrel bottom end having a thread for the connection of an adapter pin; and the adapter pin having an adapter pin top end and an adapter pin bottom end, the adapter pin top end having threads for connecting the adapter pin to the mandrel, and the adapter pin bottom end having threads for connecting the adapter pin to a top end of the tubing hanger.