发明名称 |
Frac plug with caged ball |
摘要 |
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.
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申请公布号 |
US6491116(B2) |
申请公布日期 |
2002.12.10 |
申请号 |
US20020104547 |
申请日期 |
2002.03.23 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
BERSCHEIDT KEVIN T.;SMITH DONALD R.;STEPP LEE WAYNE;FOLDS DON S.;VARGUS GREGORY W. |
分类号 |
E21B11/04;E21B33/12;E21B33/129;(IPC1-7):E21B11/04 |
主分类号 |
E21B11/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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