Chemical injection well completion apparatus and method

An apparatus to be disposed within a wellbore, the apparatus comprising:

• production tubing in communication with a pump string and a bypass string at its distal end;
• said pump string configured to pump a wellbore fluid to a surface location through said production tubing;
• said bypass string including an upper fluid gate, a packer, a lower fluid gate, and a perforating gun;
• said upper and said lower fluid gates configured to selectively allow or disallow fluid communication with a bore of said bypass string, wherein said upper fluid gate is positioned above said packer and said lower fluid gate is positioned below said packer;
• and
• a check valve to prevent reverse fluid communication from said production tubing to said pump string.

Production tubing to complete a wellbore, comprising:

• a Y-tool at a distal end of the production tubing, said Y-tool communicating a bypass string and a pump string with the production tubing;
• said pump string configured to pump a wellbore fluid into the production tubing;
• said bypass string including an upper fluid gate, a packer, a lower fluid gate, and a perforating gun;
• said upper and said lower fluid gates configured to selectively allow or disallow fluid communication with a bore of said bypass string, wherein said upper fluid gate is positioned above said packer and said lower fluid gate is positioned below said packer;
• and
• a check valve to prevent reverse fluid communication from said production tubing to said pump string.

A method to complete a wellbore with a string of production tubing, the method comprising:

• deploying the production tubing to the wellbore, the production tubing terminating at a pump string and a bypass string including an upper fluid gate, a packer, a lower fluid gate, and a perforating gun;
• expanding the packer to isolate a production zone from the upper fluid gate and the pump string;
• opening the upper and lower fluid gates and pumping wellbore fluids from the production zone through the production tubing to create an under-balanced condition;
• closing the upper and lower fluid gates and detonating the perforating gun;
• opening the lower fluid gate and injecting stimulation and neutralization chemicals to the formation through the production tubing and the bypass string;
• and
• opening the upper and lower fluid gates and pumping production fluids from the production zone to the surface through the production tubing.