公开(公告)号：US20190112881A1

公开(公告)日：2019-04-18

申请号：US15766004

申请日：2016-10-06

Applicant: MHWIRTH AS

Inventor： TORD ASLAK ASLAKSEN ,  Eivind Gimming Stensland ,  Nicolai Nilsen ,  Per Inge Roensberg

IPC: E21B19/00

Abstract: A hoisting system includes a hoisting tower, a yoke which is movable relative to the hoisting tower and which carries a tool, a first winch, a second winch, a first sheave arranged in a top section of the hoisting tower, a second sheave arranged in the top section of the hoisting tower, a first hoisting member arranged to extend from the first winch to the yoke via the first sheave, a second hoisting member arranged to extend from the second winch to the yoke via the second sheave, and at least one first releasable connector which selectively connects the second hoisting member to the yoke.

公开(公告)号：US12031393B2

公开(公告)日：2024-07-09

申请号：US17785912

申请日：2020-12-17

Applicant: MHWIRTH AS

Inventor： Per Inge Roensberg ,  Roy Birkeland ,  Ellen Kolnes ,  Nicolai Nilsen ,  Jarle Ropstad ,  Bjarne Larsen ,  Soeren Oeydna ,  Lars Otto Sannes

IPC: E21B19/15 ,  B63B35/44 ,  E21B19/00 ,  E21B19/20

CPC classification number: E21B19/155 ,  B63B35/4413 ,  E21B19/006 ,  E21B19/15 ,  E21B19/20

Abstract: A drilling rig includes a drill floor with a well center opening, a derrick having a drilling machine which is suspended above the well center opening, a pipe supply area which is arranged adjacent to the well center opening on the drill floor, and a pipe handling machine. The pipe supply area has at least one pipe rack which horizontally stores pipe sections. The pipe handling machine moves at least one of the pipe sections between a horizontal storage position in the at least one pipe rack and a vertical position or a substantially vertical position above the well center opening.

公开(公告)号：US10385630B2

公开(公告)日：2019-08-20

申请号：US15743674

申请日：2016-06-28

Applicant: MHWIRTH AS

Inventor： Nicolai Nilsen

IPC: E21B19/00

Abstract: A riser tensioning system for providing a tensioning to a riser connected to a floating installation via a tension ring. The riser tensioning system includes at least one riser tensioner assembly. Each of the at least one riser tensioner assembly includes a riser tensioning cylinder comprising a cylinder rod, at least one sheave, and a wireline with a first end and a second end. The first end is fixed to the tension ring, and the second end is fixed to the cylinder rod. The wireline extends between the tension ring and the cylinder piston via the at least one sheave.