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1.发明公开
公开(公告)号：EP0760897A1
公开(公告)日：1997-03-12
申请号：EP95921176.0
申请日：1995-05-30
申请人： NORSK HYDRO a.s.
CPC分类号： E21B27/02 , E21B33/138
摘要： Injector (1) for injecting a traceable material into an oil and/or gas reservoir, the injector being lowered down in a bore hole that is in communication with the reservoir, followed by activating an electro-hydraulic system to inject a traceable material stored in a container into the reservoir. The injector is provided with a gland plate (7) that seals the space between the injector and the wall of the bore hole (16) in a manner that pevents traceable material to be distributed in the bore hole, but secures direct injection of the material into the reservoir. The injector is adapted to be positioned at a specific depth level in the bore hole, and to be cleaned by pressurised liquid after the injection operation is fulfilled.
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公开(公告)号：EP0772728A1
公开(公告)日：1997-05-14
申请号：EP95910021.0
申请日：1995-02-14
申请人： NORSK HYDRO a.s.
CPC分类号： E21B23/00 , E21B4/00 , E21B4/18 , E21B2023/008
摘要： A locomotive or tractor (3) for pulling wire/cable-operated equipment such as measuring, logging and processing equipment in a borehole, pipe etc., comprising a long body with means of propulsion, including one or more motors for propelling the tractor. The means of propulsion consist of at least one set of rollers (13), which can be rotated and are axially inclined in relation to the tractor, with a rounded surface which has a number of sharp parts or edges; the set of rollers (13) are arranged in connection with a driven unit (8), which rotates externally in relation to the support structure (16) of the tractor and which is provided with means (14) which are designed to move the rollers in a radial direction and press them (13) against the wall of the borehole or pipe wall. The tractor is also provided with at least one set of control wheels (31), which are freely supported in relation to the tractor, which can be moved, by means of other means (32, 33), in a radial direction in relation to the tractor and which are designed to roll along the pipe wall or wall of the borehole and keep the tractor centrically oriented in relation to the pipe or borehole and prevent the tractor from rotating.
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