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公开(公告)号：EP0858583A1
公开(公告)日：1998-08-19
申请号：EP96936383.0
申请日：1996-10-21
发明人： SACKS, Ivor, S.
CPC分类号： E21B49/006 , G01B5/30 , G01B7/16 , G01L1/02
摘要： A device (10) for detecting deformations in solids includes an insertable casing (11) with inner dividing wall (20) and lower (26) and upper enclosed sections (24) filled with fluid (36 and 34). A first strain-sensing system (38), and a second strain-sensing system (42) are disposed in the lower and an upper enclosed systems respectively. A valve (18) couples the second strain-sensing system to the lower enclosed section (26) and is normally closed. The valve is constructed to open in response to a signal sent from the first strain-sensing system. The second strain-sensing system is constructed and arranged to measure the excessive strain.
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公开(公告)号：EP0877912A1
公开(公告)日：1998-11-18
申请号：EP96936382.0
申请日：1996-10-21
CPC分类号： G01B13/24 , E21B49/006
摘要： An apparatus (10) is provided for detecting deformation in solids in deep holes having a resilient vessel (12) pre-stressed into a rock formation. The vessel (12) is filled with fluid (14) and is sealed except for an outlet tube (16) of small diameter which extends all the way to, or close to, the surface (18). There the outlet tube (16) terminates in an extensible bellows (20). The whole apparatus is completely filled with fluid (14). Any deformation of the vessel (12) will cause fluid to be forced through the outlet tube (16) and so cause the bellows (20) to extend or contract. This motion can be monitored by any position-sensitive transducer (22) such as a linear variable differential transformer or capacitance bridge. A second tube (24) of the same length and size as the outlet tube (16) is filled with the same fluid. This tube (24) terminates at the bottom in close proximity to the resilient vessel (12). It also has a bellows (26) and a displacement transducer (28) at its upper end at the surface (18).
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公开(公告)号：EP0858583B1
公开(公告)日：2003-01-02
申请号：EP96936383.7
申请日：1996-10-21
发明人： SACKS, Ivor, S.
CPC分类号： E21B49/006 , G01B5/30 , G01B7/16 , G01L1/02
摘要： A device (10) for detecting deformations in solids includes an insertable casing (11) with inner dividing wall (20) and lower (26) and upper enclosed sections (24) filled with fluid (36 and 34). A first strain-sensing system (38), and a second strain-sensing system (42) are disposed in the lower and an upper enclosed systems respectively. A valve (18) couples the second strain-sensing system to the lower enclosed section (26) and is normally closed. The valve is constructed to open in response to a signal sent from the first strain-sensing system. The second strain-sensing system is constructed and arranged to measure the excessive strain.
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公开(公告)号：EP0877912B1
公开(公告)日：2002-12-18
申请号：EP96936382.9
申请日：1996-10-21
CPC分类号： G01B13/24 , E21B49/006
摘要： An apparatus (10) is provided for detecting deformation in solids in deep holes having a resilient vessel (12) pre-stressed into a rock formation. The vessel (12) is filled with fluid (14) and is sealed except for an outlet tube (16) of small diameter which extends all the way to, or close to, the surface (18). There the outlet tube (16) terminates in an extensible bellows (20). The whole apparatus is completely filled with fluid (14). Any deformation of the vessel (12) will cause fluid to be forced through the outlet tube (16) and so cause the bellows (20) to extend or contract. This motion can be monitored by any position-sensitive transducer (22) such as a linear variable differential transformer or capacitance bridge. A second tube (24) of the same length and size as the outlet tube (16) is filled with the same fluid. This tube (24) terminates at the bottom in close proximity to the resilient vessel (12). It also has a bellows (26) and a displacement transducer (28) at its upper end at the surface (18).
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