Patent ID: 9194204
Filing Date: 2015-11-24
Classification: E21B

Abstract:
1. A 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, 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 sealing assemblies and locking dog assembly being carried by a tubular mandrel ( 12 ), wherein at least one of the sealing assemblies ( 15 , 16 ) comprises an expandable element ( 22 ; 34 ) being activated by a pair of annular press elements ( 19 , 20 ), wherein each locking dog ( 61 ) is provided with a pair of axially extending torsion rods ( 69 , 70 ) to press the locking dogs ( 61 ) radially inward and each of the pair of torsion rods ( 69 , 70 ) has an outer end and an inner end, the outer ends ( 75 , 81 ) extending into and being axially movable in a circumferential groove ( 76 ), while the inner ends ( 82 , 83 ) are each engaged with a side of the locking dog ( 61 ).