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公开(公告)号：EP1492937A1
公开(公告)日：2005-01-05
申请号：EP03712436.9
申请日：2003-04-01
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.
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公开(公告)号：EP1492937B1
公开(公告)日：2007-03-21
申请号：EP03712436.9
申请日：2003-04-01
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.
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公开(公告)号：EP1121508B1
公开(公告)日：2005-04-06
申请号：EP99949233.3
申请日：1999-10-14
CPC分类号： E21B33/068 , E21B19/16 , E21B21/01 , E21B2021/006
摘要： In drilling wells tubular members are added to or removed from the drill string whilst the circulation of mud continues and there is a blind preventer (6) positioned between lower slips and grips (8) engaging a downhole drill string and an upper slips and grips (5) engaging a tubular to be added to the drill string and the tubular is positioned on the blind preventer, the blind preventer opened and the upper slips and grips passed through the blind preventer and the tubular connected to the drill string.
摘要翻译： 在钻井中，管状部件被添加到钻柱或者从钻柱移除，同时泥浆的循环继续并且存在位于下部卡瓦和夹紧件（8）之间的防盲装置（6），该夹紧装置（8）接合井下钻柱和上部卡瓦和夹具 5）接合待添加到钻柱中的管件，并将管件定位在防盲装置上，打开防盲装置，并使上部滑动件和夹具穿过防盲装置和连接到钻柱的管件。
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公开(公告)号：EP1121508A1
公开(公告)日：2001-08-08
申请号：EP99949233.3
申请日：1999-10-14
CPC分类号： E21B33/068 , E21B19/16 , E21B21/01 , E21B2021/006
摘要： In drilling wells tubular members are added to or removed from the drill string whilst the circulation of mud continues and there is a blind preventer (6) positioned between lower slips and grips (8) engaging a downhole drill string and an upper slips and grips (5) engaging a tubular to be added to the drill string and the tubular is positioned on the blind preventer, the blind preventer opened and the upper slips and grips passed through the blind preventer and the tubular connected to the drill string.
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