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AssigneePlexus Holdings, PLC.
InventorsMichael Robertson, Richard Arthur, Craig Hendrie, Brent Harrald, Steve Rizza, Jinde Hao
Estimating the term…
A crown plug for a tree of an oil/gas well/wellhead has a securement arrangement for securing the crown plug within the tree. The main body of the crown plug comprises a solid body creating the barrier within the production bore. The solid body creates a robust, strong and reliable barrier. The crown plug is retained within the outer member through inward distortion which secures the crown plug. The securement arrangement arises from an inward radial force that distorts the outer member inwardly to grip a component located within the outer member. The outer member elastically deforms and the outer member returns to a released position once the clamping force is released. Two concentric oppositely arranged tapered surfaces move axially to create the inwardly directed force. The clamping force and the solid body together provide an improved crown plug which is easy and reliable to operate.
A crown plug securement system comprising an outer member of a bore, a crown plug and a securement device to secure the crown plug within the outer member, the securement device comprising a clamping arrangement actuatable between a first configuration and a second configuration, wherein, in the first configuration, a clamping member is in an unclamped configuration and enables the crown plug to be axially moved within the outer member to an axial position which is aligned with the clamping member of the clamping arrangement and, in the second configuration, the clamping arrangement exerts sufficient radial force on the outer member to distort the outer member inwardly to grip the crown plug and secure the crown plug in the axial position within the bore, in which the crown plug comprises a unitary component including a one-piece component and in which in changing from an unclamped position to a clamped position the crown plug solely requires positioning at the clamped position without any manipulation of any securement elements located on the crown plug, wherein the crown plug is solely secured in position by the clamping arrangement and the crown plug is solely secured in position by movement of elements located externally of the outer member, in which the crown plug comprises a main body arranged to create a barrier across the outer member, and wherein the main body comprises a solid body providing a bung which fills the outer member within a sealing zone and wherein the sealing zone extends along an axial length of the outer member.
A method of securing a crown plug within a wellhead comprising the step of activating a securement device to secure the crown plug within an outer member of a bore, wherein the securement device comprises a clamping arrangement, the step of activating the securement device comprising activating the clamping arrangement between a first configuration and a second configuration,
Dependencies are inferred from the claim text.