| 发明名称 | Assisting retrieval of a downhole tool | ||
| 摘要 | A well tool includes: a well packer; a hydraulic sub-assembly coupled to the well packer; an anti-preset assembly coupled to the hydraulic sub-assembly; a slip assembly coupled to the anti-preset assembly; and a fold-back assembly coupled between the well packer and the hydraulic sub-assembly. The well packer includes an expandable member that rides on a mandrel extending at least a portion of the well tool. The fold-back assembly includes a bias member carried on the mandrel and adapted to engage a profile formed on the mandrel based on a setting stroke that adjusts the expandable member into an expanded position in substantially sealing contact with a tubular. | ||
| 申请公布号 | US9416616(B2) | 申请公布日期 | 2016.08.16 |
| 申请号 | US201214420309 | 申请日期 | 2012.11.16 |
| 申请人 | Halliburton Energy Services, Inc. | 发明人 | Delzell Christopher Robert;Richards William Mark;Henderson William David;Mullen Bryon |
| 分类号 | E21B23/06;E21B33/128;E21B33/129 | 主分类号 | E21B23/06 |
| 代理机构 | Fish & Richardson P.C. | 代理人 | Richardson Scott;Fish & Richardson P.C. |
| 主权项 | 1. A well tool comprising: a well packer that comprises an expandable member that rides on a mandrel extending at least a portion of the well tool; a hydraulic sub-assembly coupled to the well packer; an anti-preset assembly coupled to the hydraulic sub-assembly; a slip assembly coupled to the anti-preset assembly; and a fold-back assembly coupled between the well packer and the hydraulic sub-assembly, the fold-back assembly comprising: a bias member carried on the mandrel and adapted to engage a profile formed on the mandrel based on a setting stroke that adjusts the expandable member into an expanded position in substantially sealing contact with a tubular; anda ring member carried on the mandrel adjacent the bias member. | ||
| 地址 | Houston TX US | ||