System and method for stimulating multiple production zones in a wellbore with a tubing deployed ball seat

A method of selectively fracturing multiple zones within a wellbore with a single trip into the wellbore with a fracture string, the method comprising:

• running at least a first ball seat assembly into a wellbore;
• selectively connecting the first ball seat assembly onto a first housing on the fracture string within the wellbore, wherein the fracture string is positioned in the wellbore prior to running the first ball seat assembly into the wellbore;
• running at least a second ball seat assembly into the wellbore after running the first ball seat assembly;
• selectively connecting the second ball seat assembly to a second housing on the fracture string;
• applying pressure to the fracturing string to open a hydro port sub on the fracture string;
• inserting a first ball in the fracture string, the first ball adapted to seat on the first ball seat and prevent fluid flow within the fracture string past the first ball seat;
• pumping fluid down the fracture string to create a pressure differential, the pressure differential moving a sleeve within the first housing opening a first fracture port;
• fracturing a formation adjacent the first fracture port;
• inserting a second ball in the fracture string, the second ball adapted to seat on the second ball seat and prevent fluid flow within the fracture string past the second ball seat;
• pumping fluid down the fracture string to create a pressure differential, the pressure differential moving a sleeve within the second housing opening a second fracture port;
• and
• fracturing a formation adjacent to the second fracture port.

A method for completing a hydrocarbon producing wellhole, comprising:

• running a ball seat assembly into a work string within a wellbore;
• selectively connecting the ball seat assembly to a portion of the work string, the portion having a port and a sleeve movable between a closed position preventing fluid communication through the port and an open position allowing fluid communication through the port;
• inserting a ball into the work string, the ball adapted to seat on the ball seat assembly preventing fluid flow through the work string past the ball seat;
• applying a pressure differential within the work string, wherein upon the application of a predetermined pressure differential the sleeve moves to the open position;
• and
• treating a well formation through the open port.

A system for treating multiple zones of a wellbore with a single trip of a work string, the system comprising:

• a work string positioned within the wellbore;
• a first plurality of housings located along the work string, each housing of the first plurality of housings having a port and a sleeve movable to open and close the port;
• a second plurality of housings located along the work string, each housing of the second plurality of housings having a port and a sleeve movable to open and close the port;
• a first plurality of ball seat assemblies that may be run into the work string positioned in the wellbore, each of the first plurality of ball seat assemblies adapted to selectively mate with a housing of the first plurality of housing;
• a first plurality of balls each being a different size that may be inserted individually into the work string, each ball of the first plurality of balls adapted to be retained by a corresponding ball seat assembly within the first plurality of ball seat assemblies, wherein a pressure differential may be applied to the work string to move the sleeve and open the port of each housing of the first plurality of housings;
• a second plurality of ball seat assemblies that may be run into the work string positioned in the wellbore, each of the second plurality of ball seat assemblies adapted to selectively mate with a housing of the second plurality of housings;
• and
• a second plurality of balls each being a different size that may be inserted individually into the work string, each ball of the second plurality of balls adapted to be retained by a corresponding ball seat assembly within the second plurality of ball seat assemblies, wherein a pressure differential may be applied to the work string to move the sleeve and open the port of each housing of the second plurality of housings.