Oil well annulus flow restrictor and stabilisation/centralisation/integrity device
Номер патента: GB201102815D0
Опубликовано: 06-04-2011
Автор(ы):
Принадлежит: HASTIE MICHAEL C, HASTIE NIALL C
Опубликовано: 06-04-2011
Автор(ы):
Принадлежит: HASTIE MICHAEL C, HASTIE NIALL C
Реферат: An annular sealing device 1 for a wellbore comprising a ring 2 located in a wellbore allowing a production string or tubing to pass through. The ring includes a plurality of interlocking elements which are expandable radially inwards to engage the tubing passing through the ring and seal the annular space or stabilise and centralise the tubing. The interlocking elements can be blades 11 which interlock to form an iris closure system. The device includes a ram system to move the interlocking element radially inwards.
Process and equipment for oil well drilling and completing operations in deep water
Номер патента: CA1296998C. Автор: Renato Sanches Rodrigues,Jayme Hirotugu Ogura. Владелец: Petroleo Brasileiro SA Petrobras. Дата публикации: 1992-03-10.