发明授权
- 专利标题: Screen saver sub
- 专利标题(中): 屏幕保护程序子
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申请号: US11746991申请日: 2007-05-10
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公开(公告)号: US07647968B2公开(公告)日: 2010-01-19
- 发明人: Thomas G. Corbett , Christian F. Bayne
- 申请人: Thomas G. Corbett , Christian F. Bayne
- 申请人地址: US TX Houston
- 专利权人: Baker Hughes Incorporated
- 当前专利权人: Baker Hughes Incorporated
- 当前专利权人地址: US TX Houston
- 代理商 Steve Rosenblatt
- 主分类号: E21B43/04
- IPC分类号: E21B43/04
摘要:
A transition piece is provided near an end of a screen assembly to allow transition from a lighter weight and collapse resistant pipe under the screen sections to a heavier wall and higher collapse strength pipe between the top of the screen and the isolation packer. When a screen out occurs, the heavier wall pipe can handle the new pressures that are applied to the formation and to the tubular to try to collapse it. The screen portion can still be built with thinner wall pipe as the screen out condition protects that pipe from collapse pressure because the fully gravel packed annular space keeps the surface applied pump pressure from exerting a collapse force on the base pipe under the screen.
公开/授权文献
- US20080277114A1 Screen Saver Sub 公开/授权日:2008-11-13
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