An offshore vessel for performing offshore subsea wellbore related activities, for example for drilling a subsea wellbore includes a drilling tower. A method for drilling a subsea wellbore includes using an offshore vessel and a method for tripping a tubulars string is disclosed. The offshore vessel is provided with a hoisting system which has a first configuration, wherein a hoisting cable is connected to a working deck and a second configuration wherein said hoisting cable is connected to a traveling block. The system allows for efficient tripping in and tripping out.

An apparatus for assembling a tubular string includes a rig drilling bail, a joint bail extender, and a device. The joint bail extender is rigidly coupled to the rig drilling bail. The device is coupled to the first joint bail extender and configured to engage a tubular segment.

A system for hoisting a load on a drilling rig includes: a hoisting means having an elongated hoisting member and an elongated hoisting member drive means; a drill string rotation means suspended from an end of the elongated hoisting member; a support structure having a first side and a second side and being adapted to support at least a portion of the weight the drill string rotation means; a first elongated hoisting member guiding means connected to the support structure; and a counterweight connected to the elongated hoisting member at the second side of the support structure. The elongated hoisting member is reeved over the first elongated hoisting member guiding means from the first to the second side of the support structure. The drill string rotation means is suspended from the elongated hoisting member at the first side of the support structure

Present embodiments are directed to a top drive system having a top drive, a bogey chassis, wherein the top drive is coupled with the bogey chassis, an upper bushing coupling the bogey chassis to a torque track, and a lower bushing coupling the bogey chassis to the torque track, wherein the upper and lower bushings are configured to translate along the torque track.

Present embodiments are directed to a top drive system having a top drive, a bogey chassis, wherein the top drive is coupled with the bogey chassis, an upper bushing coupling the bogey chassis to a torque track, and a lower bushing coupling the bogey chassis to the torque track, wherein the upper and lower bushings are configured to translate along the torque track.

An offshore drilling rig configured for lowering and/or raising a string of tubular equipment into a subsea borehole. The drilling rig includes a drill deck; a first hoisting system being adapted for raising or lowering a first load carrier along a vertical first hoisting axis, wherein the first hoisting system is supported by a first support structure extending upwardly relative to the drill deck; a second hoisting system being adapted for raising or lowering a second load carrier along a vertical second hoisting axis located apart from the first hoisting axis, wherein the second hoisting system is supported by a second support structure extending upwardly relative to the drill deck; and a joint operations well center on the drill deck. During joint operations, the first and second hoisting axes are preferably located apart from the joint operations well center.

An offshore drilling rig configured for lowering and/or raising a string of tubular equipment into a subsea borehole. The drilling rig includes a drill deck; a first hoisting system being adapted for raising or lowering a first load carrier along a vertical first hoisting axis, wherein the first hoisting system is supported by a first support structure extending upwardly relative to the drill deck; a second hoisting system being adapted for raising or lowering a second load carrier along a vertical second hoisting axis located apart from the first hoisting axis, wherein the second hoisting system is supported by a second support structure extending upwardly relative to the drill deck; and a joint operations well center on the drill deck. During joint operations, the first and second hoisting axes are preferably located apart from the joint operations well center.

An offshore drilling system includes a drilling tower, a tubular string hoisting device with a crown block and a travelling block suspended from the crown block in a multiple fall arrangement. A heave compensation system is adapted to provide heave compensation of the travelling block. The heave compensation system includes a hydraulic sheave compensator. The system further includes a mobile working deck which is movable with respect to the drilling tower within a motion range including a heave compensation motion range. The heave compensation system is further adapted to provide heave compensation of the mobile working deck by a hydraulic deck compensator, which is hydraulically connected via a hydraulic conduit to the hydraulic sheave compensator, such that in operation the deck compensator moves synchronously with the sheave compensator of the heave compensation system.

A tool for use in suspending operation of an oil or gas well driven by an artificial lift with a polished rod connected to a sucker rod in a tubing string. The tool includes a body having a lower narrow portion dimensioned to fit within the interior cavity of a tubing string inlet or an upper extension thereof, and an upper wide diameter portion defining a substantially horizontal landing surface dimensioned to rest upon the top edge of the tubing string inlet or the upper extension thereof. The tool includes one or more sucker rod-engaging structures and one or more longitudinal slots extending through the lower narrow portion and the upper wide diameter portion to allow passage of fluid or gas through the tool when the tool is supported on the top edge of the tubing string inlet or the upper extension thereof.

A tool for use in suspending operation of an oil or gas well driven by an artificial lift with a polished rod connected to a sucker rod in a tubing string. The tool includes a body having a lower narrow portion dimensioned to fit within the interior cavity of a tubing string inlet or an upper extension thereof, and an upper wide diameter portion defining a substantially horizontal landing surface dimensioned to rest upon the top edge of the tubing string inlet or the upper extension thereof. The tool includes one or more sucker rod-engaging structures and one or more longitudinal slots extending through the lower narrow portion and the upper wide diameter portion to allow passage of fluid or gas through the tool when the tool is supported on the top edge of the tubing string inlet or the upper extension thereof.