초록 ▼

A downhole tool for sealing a wellbore. The downhole tool includes a packer with a ball seat defined therein. A sealing ball is carried with the packer into the well. The movement of the sealing ball away from the ball seat is limited by a ball cage which is attached to the upper end of the packer.

A downhole tool for sealing a wellbore. The downhole tool includes a packer with a ball seat defined therein. A sealing ball is carried with the packer into the well. The movement of the sealing ball away from the ball seat is limited by a ball cage which is attached to the upper end of the packer. The ball cage has a plurality of ports therethrough for allowing flow into the ball cage and through the packer at certain flow rates. A spring is disposed in a longitudinal opening of the packer and engages the sealing ball to prevent the sealing ball from engaging the ball seat until a predetermined flow rate is reached. When the packer is set in the hole, flow through the frac plug below a predetermined flow rate is permitted. Once a predetermined flow rate in the well is reached, a spring force of the spring will be overcome and the sealing ball will engage the ball seat so that no flow through the frac plug is permitted.

대표청구항 ▼

1. A downhole tool for use in a wellbore comprising:a mandrel; at least one slip disposed on the mandrel for engaging the wellbore when the downhole tool is placed in a set position; and at least one gripping member disposed on the downhole tool; wherein the downhole tool is comprised of a drillable

1. A downhole tool for use in a wellbore comprising:a mandrel; at least one slip disposed on the mandrel for engaging the wellbore when the downhole tool is placed in a set position; and at least one gripping member disposed on the downhole tool; wherein the downhole tool is comprised of a drillable material and wherein the at least one gripping member prevents any portion of the downhole tool that falls downwardly in the wellbore, thereby engaging a downhole apparatus positioned in the wellbore below the downhole tool, from spinning relative thereto when the portion of the downhole tool is engaged by a drill to drill the downhole tool out of the wellbore.