-
公开(公告)号：EP0975992B1
公开(公告)日：2006-08-09
申请号：EP98914537.0
申请日：1998-04-07
CPC分类号： E21B34/06 , E21B34/16 , E21B41/00 , E21B43/11852 , E21B47/14 , E21B47/16 , E21B47/18 , E21B47/185
摘要： An apparatus and method of communicating in a tubular system (20) through a media (65) disposed therein and actuating a controllable device (58) are disclosed. The apparatus and method utilize a transmission apparatus (16) at a transmission node that is in communication with the media (65). The transmission apparatus (16) generates pressure impulses that are propagated through the media (65). The pressure impulses may be either positive or negative pressure impulses depending upon the selected transmission apparatus. The pressure impulses are detected by a reception apparatus (77) at a reception node. The detection apparatus may detect the pressure impulses as variation in the media (65) or as variation in the tubular system (20) caused by the pressure impulses. Once the detection apparatus (77) has detected the appropriate pressure impulse or pattern of pressure impulses, a signal may be generated to actuate the controllable device (58).
-
公开(公告)号：EP0974066B1
公开(公告)日：2018-10-10
申请号：EP98915487.7
申请日：1998-04-07
IPC分类号： E21B47/14
CPC分类号： E21B43/11852 , E21B34/06 , E21B34/16 , E21B41/00 , E21B47/14 , E21B47/16 , E21B47/18 , E21B47/185
摘要： A system and method in accordance with the invention communicator remotely with remotely controllable down hole tools in a well bore at a drilling installation. At the surface, high energy pressure impulses directed into the tubing or the annulus, or both, being at a level to propagate through an interface between very different impedances zones, such as an upper level gas zone and a lower level of mobile fluid media extending down into the desired downhole location. The pressure impulses, provided by directionally gating along the longitudinal confining path a pressure impulse initially having sharp leading and trailing edges, reach the downhole location as physical perturbations forming a discernible pattern that can be detected by one or more energy responsive transducers. With combinations of these signals, one of a number of separate control devices can be remotely actuated. The system avoids the need for physical or electrical connections and concurrently greatly reduces the likelihood of accidental operation.
-
搜索结果
2 条记录 (耗时 0.01 秒)
