Downhole packer med kugleventil i holder

摘要

A downhole packer tool for sealing a wellbore includes a mandrel (40) with packer (34) and a ball seat (50) defined therein. A sealing ball (38) is carried by a ball cage (36) which is attached to the upper end of the packer. The ball cage has a plurality of ports (92) therethrough for allowing fluid flow into the ball cage and through the packer at certain flow rates. A spring (82) is disposed in a longitudinal opening of the mandrel 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.