Well stimulation tool and method of using same

A method of stimulating a hydrocarbon well comprising steps of:

• connecting a well stimulation tool to a top of a tubing hanger in a tubing head spool of the well, the well stimulation tool comprising:
• an adapter spool having a bottom flange adapted for connection 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 of the tubing hanger;
• mounting a high-pressure valve to the flange at the mandrel top end;
• connecting a high-pressure line to a top of the high-pressure valve;
• opening the high-pressure valve;
• and
• pumping high-pressure fluid through the high-pressure line to stimulate the hydrocarbon well.

A method of stimulating a hydrocarbon well comprising steps of:

• assembling a combination of a well stimulation tool and a high-pressure valve, the well stimulation tool comprising:
• an adapter spool having a bottom flange adapted for connection to a 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 the high-pressure valve, and the mandrel bottom end having a thread for the connection of an adapter pin;
• 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 of a tubing hanger in the tubing head spool;
• and
• a lifting head assembly including a bottom end for connection of the high-pressure valve and a top end with a lifting eye to permit the well stimulation tool to be lifted for mounting to the tubing head spool;
• hoisting the combination of the well stimulation tool and the high-pressure valve above the tubing head spool of the well by connecting to the lifting eye;
• lowering the combination to connect the adapter pin bottom end to the tubing hanger and further lowering the combination to mount the adapter spool to the tubing head spool;
• and
• connecting a high-pressure line to the high-pressure valve to permit high-pressure fluids to be pumped into the hydrocarbon well.