- 专利标题: Anti-whirl systems and methods
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申请号: US15820003申请日: 2017-11-21
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公开(公告)号: US10215010B1公开(公告)日: 2019-02-26
- 发明人: Mahmoud Hadi , Brian Ellis
- 申请人: Nabors Drilling Technologies USA, Inc.
- 申请人地址: US TX Houston
- 专利权人: NABORS DRILLING TECHNOLOGIES USA, INC.
- 当前专利权人: NABORS DRILLING TECHNOLOGIES USA, INC.
- 当前专利权人地址: US TX Houston
- 代理机构: Haynes and Boone, LLP
- 主分类号: E21B44/00
- IPC分类号: E21B44/00 ; E21B41/00 ; G05B19/416 ; E21B47/06
摘要:
Systems and methods for reducing or eliminating whirl are described. The system includes a controller and a drive system. The controller is configured to collect downhole information, determine a natural frequency of a drill string in the lateral motion, determine correlative relationships, model a forward whirl region, generate a control algorithm, determine a top drive supervisory setpoint, and provide operational control signals. The drive system is configured to receive the one or more operational control signals and limit the top drive RPM.
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