SUBMARINE WELLHEAD EQUIPMENT WITH CONTROL UNIT Russian patent published in 2016 - IPC E21B33/43 

FIELD: oil and gas industry.

SUBSTANCE: invention suggests fastener for fixing suspension device (36) in submarine wellhead equipment with control unit to control downstream suspension device (36) behind annular space (52). At that annular space (52) is located between outer surface of the inner column (32) of casing and inner surface of outer column (22) of casing. Control tools comprise tube (102) designed to be fixed inside the wellhead, at that tube (102) contains fluid pilot channel (100), which by fluid connects annular space (52) with control opening (106) located upstream the suspension device (36). Besides the fastener comprises clamping device intended to clamp the suspension device (36), and the clamping device includes bead with outer cone-shaped surface and circular component with inner cone-shaped surface. At that bead and circular component are made with potential axial movement between the first position, wherein cone-shaped surface of the circular component does not apply force to the bead and the second position, wherein cone-shaped surface of the circular component applies radial force sufficient for inward bead deformation in order to deform tube (102) inwards for the purpose of suspension device (36) catching. The submarine wellhead equipment is suggested with the above fastener as well as control method for annular space where the said equipment is used.

EFFECT: simplified design and reduced labour intensity of the device operation.

15 cl, 12 dwg