发明名称 |
PACKER ASSEMBLY HAVING DUAL HYDROSTATIC PISTONS FOR REDUNDANT INTERVENTIONLESS SETTING |
摘要 |
A packer for use in a wellbore includes a packer mandrel. First and second pistons are slidably disposed about the packer mandrel defining first and second chambers therewith. A first activation assembly initially prevents movement of the first piston. A second activation assembly initially prevents movement of the second piston. A seal assembly is disposed about the packer mandrel between the first and second pistons such that actuation of the first activation assembly allows a force generated by a pressure difference between the wellbore and the first chamber to shift the first piston in a first direction toward the seal assembly to radially expand the seal assembly and actuation of the second activation assembly allows a force generated by a pressure difference between the wellbore and the second chamber to shift the second piston in a second direction toward the seal assembly to radially expand the seal assembly. |
申请公布号 |
EP2867446(A1) |
申请公布日期 |
2015.05.06 |
申请号 |
EP20120880575 |
申请日期 |
2012.07.02 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
EZELL, MICHAEL, DALE |
分类号 |
E21B33/122;E21B33/12;E21B33/128;E21B33/1295 |
主分类号 |
E21B33/122 |
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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