公开(公告)号：US11028549B2

公开(公告)日：2021-06-08

申请号：US15771688

申请日：2016-10-06

Applicant: MAERSK DRILLING A/S ,  TOTAL E&P DANMARK A/S

Inventor： Michael Kannegaard ,  Hicham Chajai ,  Zhanibek Yerkinovich Rakhmetov

IPC: E02B17/02 ,  E21B33/035 ,  E21B33/043 ,  E21B33/14 ,  E21B41/08 ,  E21B19/00

Abstract: Without limitation, embodiments of the present invention relates to an offshore wellhead platform (100), the offshore wellhead platform (100) comprising a configurable support structure (200) for supporting upper parts of a plurality of conductors (210) through which one or more well processing tasks can be performed, wherein the configurable support structure (200) further provides a first position (150) and a second position (160) for the conductors (210), and the offshore wellhead platform (100) allows movement of an upper part of a conductor (210) between its first (150) and second position (160). In this way, efficiency when processing a plurality of wells is provided since repositioning of the well center is not needed or needed significantly less. Effectively, the wells are brought to the well center so-to-speak instead of the well center needing to be moved to each well.

公开(公告)号：US20190194895A1

公开(公告)日：2019-06-27

申请号：US15771710

申请日：2016-10-31

Applicant: Maersk Drilling A/S ,  TOTAL S.A.

Inventor： Michael Kannegaard ,  Hicham Chajai

IPC: E02B17/02 ,  E21B33/035 ,  E21B33/043 ,  E21B19/00 ,  E21B33/14

CPC classification number: E02B17/02 ,  E21B19/002 ,  E21B19/004 ,  E21B33/035 ,  E21B33/043 ,  E21B33/143 ,  E21B41/08

Abstract: A method for forming an offshore well comprises forming a well structure (1) which includes a lower well portion extending below a seabed and an upper well portion (2) extending upwardly between the seabed (18) and a terminating upper end (3) of the well structure, wherein the well structure comprises a plurality of concentrically arranged tubular strings (22) and at least one annulus (48) defined therebetween. The method includes steps for minimising the bending stiffness of the upper well portion. In one example minimising the bending stiffness of the upper well portion may comprise partially filling at least one annulus with cement (52) to a height which: is intermediate the seabed and the terminating upper end of the well structure. In another example minimising the bending stiffness of the upper well portion may comprise providing a cement disruptor within at least one annulus and locating cement within said at least one annulus to define a cement sheath, wherein the cement disruptor, for example sleeve (122), reduces resistance of at least a portion of the cement sheath to bending of the upper well portion. In a further example minimising the bending stiffness of the upper well portion may comprise locating a flexible material within at least one annulus; and In a further example minimising the bending stiffness of the upper well portion may comprise varying the bending stiffness along at least one of the plurality of tubular strings.