发明授权
- 专利标题: IMPROVED SLIPS
- 专利标题(中): 改进WEDGE保持系统
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申请号: EP03712436.9申请日: 2003-04-01
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公开(公告)号: EP1492937B1公开(公告)日: 2007-03-21
- 发明人: AYLING, Laurence, John
- 申请人: COUPLER DEVELOPMENTS LIMITED
- 申请人地址: St Georges's Chambers, 1 Athol Street Douglas, Isle of Man IM1 1JD GB
- 专利权人: COUPLER DEVELOPMENTS LIMITED
- 当前专利权人: COUPLER DEVELOPMENTS LIMITED
- 当前专利权人地址: St Georges's Chambers, 1 Athol Street Douglas, Isle of Man IM1 1JD GB
- 代理机构: Lucas, Brian Ronald
- 优先权: GB0207908 20020405
- 国际公布: WO2003087528 20031023
- 主分类号: E21B19/07
- IPC分类号: E21B19/07 ; E21B19/10
摘要:
Slips (1, 21, 41) for engaging any jointed, coiled or flexible tubular with substantially no scoring, gouging or scraping, such as when supporting a drill string in a borehole or gripping a tubular (2, 22) during the connection or disconnection of a tool joint or pulling a cable or pipeline; additionally, applying a pre-determined minimum gripping force in order to avoid rotary slippage when the weight of the string is insufficient to achieve a conventional slips action; additionally, including a coarse wedge (30, 50) to take up the extra travel of a worn tool joint or a tubular of smaller diameter, with a means to ensure that the coarse wedge acts before the fine wedge (29, 49) does and a means to ensure that the wedging action remains if the actuating force is removed; additionally, including a secondary slips (40) to interfere with the upset on the tool joint to avoid relying on friction to support the string and a means of integrating this with the gripping slips and ensuring that the secondary slips act first; additionally, the application of these attributes 'upside down' to achieve the action of snubbing when forcing a tubular into compression instead of tension for any reason.
公开/授权文献
- EP1492937A1 IMPROVED SLIPS 公开/授权日:2005-01-05
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