发明名称 |
PACKER ASSEMBLY HAVING SEQUENTIALLY OPERATED HYDROSTATIC PISTONS FOR 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. An activation assembly initially prevents movement of the first piston. A release assembly initially prevents movement of the second piston. First and second seal assemblies are disposed about the packer mandrel such that actuation of the 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 first seal assembly to radially expand the first seal assembly and to actuate the release assembly and, actuation of the release assembly allows a force generated by a pressure difference between the wellbore and the second chamber to shift the second piston in the first direction toward the second seal assembly to radially expand the second seal assembly. |
申请公布号 |
EP2867447(A1) |
申请公布日期 |
2015.05.06 |
申请号 |
EP20120880470 |
申请日期 |
2012.07.02 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
EZELL, MICHAEL, DALE;MALLORY, BEAUFORD, SEAN |
分类号 |
E21B33/128;E21B23/06;E21B33/124 |
主分类号 |
E21B33/128 |
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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