| 发明名称 | Restriction engaging system | ||
| 摘要 | A restriction engaging system includes, a restriction engager, one or more restrictions, and at least one counter configured to permit or prevent passage of a restriction engager through one of the one or more restrictions. | ||
| 申请公布号 | US9038656(B2) | 申请公布日期 | 2015.05.26 |
| 申请号 | US201113340939 | 申请日期 | 2011.12.30 |
| 申请人 | Baker Hughes Incorporated | 发明人 | Gerrard David P.;Xu Yang |
| 分类号 | F16K29/00;E21B33/12;E21B33/134;E21B34/14 | 主分类号 | F16K29/00 |
| 代理机构 | Cantor Colburn LLP | 代理人 | Cantor Colburn LLP |
| 主权项 | 1. A system, comprising: one or more restriction engagers; one or more restrictions; and at least one counter configured to permit or prevent passage of a restriction engager through one of the one or more restrictions, the at least one counter configured to be responsively indexed each time one of the restriction engagers passes through the one of the one or more restrictions, the at least one counter preventing passage of an additional one of the restriction engagers after a selected number of the restriction engagers have passed the one of the one or more restrictions. | ||
| 地址 | Houston TX US | ||