发明名称 |
Downhole packer with caged ball valve |
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. <IMAGE> |
申请公布号 |
EP1172521(A2) |
申请公布日期 |
2002.01.16 |
申请号 |
EP20010306019 |
申请日期 |
2001.07.12 |
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 |
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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