公开(公告)号：EP2521837A4

公开(公告)日：2017-11-15

申请号：EP11731987

申请日：2011-01-10

申请人： INTERWELL TECH AS

发明人： HIORTH ESPEN ,  STORMO TERJE

IPC分类号： E21B33/128

CPC分类号： E21B33/12 ,  E21B34/105

摘要： Device for carrying a replacement safety valve in a well tube, with a straddle structure for placement inside a damaged “Down Hole Safety Valve” nipple seal area. It is comprising a pair of sealing assemblies (15, 16) to be activated upon setting of the device to seal said nipple seal area, and a locking dog assembly (17) for locking the device in the well tube, said elements being carried by a tubular mandrel (12). At least one of the sealing assemblies (15, 16) comprises a expandable element (22; 34) being activated by a pair of annular press elements (19, 20).