发明授权
- 专利标题: Indexing sleeve for single-trip, multi-stage fracing
- 专利标题(中): 分度套筒,用于单行,多段绕组
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申请号: US13022504申请日: 2011-02-07
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公开(公告)号: US08403068B2公开(公告)日: 2013-03-26
- 发明人: Clark E. Robison , Robert Coon , Robert Malloy
- 申请人: Clark E. Robison , Robert Coon , Robert Malloy
- 申请人地址: US TX Houston
- 专利权人: Weatherford/Lamb, Inc.
- 当前专利权人: Weatherford/Lamb, Inc.
- 当前专利权人地址: US TX Houston
- 代理机构: Wong, Cabello, Lutsch, Rutherford & Brucculeri, LLP
- 主分类号: E21B33/12
- IPC分类号: E21B33/12 ; E21B43/00
摘要:
A flow tool has a sensor that detects plugs (darts, balls, etc.) passing through the tool. An actuator moves an insert in the tool once a preset number of plugs have passed through the tool. Movement of this insert reveals a catch on a sleeve in the tool. Once the next plug is deployed, the catch engages the plug on the sleeve so that fluid pressure applied against the seated plug through the tubing string can move the sleeve. Once moved, the sleeve reveals ports in the tool communicating the tool's bore with the surrounding annulus so an adjacent wellbore interval can be stimulated. The actuator can use a sensor detecting passage of the plugs through the tool. A spring disposed in the tool can flex near the sensor when a plug passes through the tool, and a counter can count the number of plugs that have passed.
公开/授权文献
- US20110240301A1 Indexing Sleeve for Single-Trip, Multi-Stage Fracing 公开/授权日:2011-10-06