发明授权
- 专利标题: Plunger lift with chemical injection
- 专利标题(中): 柱塞提升与化学注射
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申请号: US12841226申请日: 2010-07-22
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公开(公告)号: US08469103B2公开(公告)日: 2013-06-25
- 发明人: David Barry
- 申请人: David Barry
- 申请人地址: US NC Cary
- 专利权人: ABB Inc.
- 当前专利权人: ABB Inc.
- 当前专利权人地址: US NC Cary
- 代理商 Denis Ticak; Michael Charles Prewitt
- 主分类号: E21B43/00
- IPC分类号: E21B43/00 ; E21B37/10
摘要:
A method and system operates a well having an outer casing, a tubing positioned inside the outer casing, and a plunger moveable within the tubing to periodically draw out a liquid slug. A chemical to slug size ratio is set by the operator. Thereafter, the gas flow rate is monitored and the well is shut-in when the gas flow rate drops below a predetermined threshold. After well shut-in, a calculated amount of chemical foaming agent is injected. The size of the liquid slug is calculated and then the well is opened, drawing the plunger and liquid slug up to the surface. The calculated amount of chemical foaming agent is calculated based on one or more previous liquid slug size determinations and the set chemical to slug size ratio.
公开/授权文献
- US20110024130A1 PLUNGER LIFT WITH CHEMICAL INJECTION 公开/授权日:2011-02-03