Itrec B.v.

Anne Klaas De Groot

Joop Roodenburg

Diederick Bernardus Wijning

Terence Willem August Vehmeijer

Pieter Dirk Melis Van Duivendijk

Robert Frodo Van Kuilenburg

Pieter Dirk Melis Van Duivenduk

A hoisting crane includes a slew bearing. The slew bearing includes a top bearing ring, a bottom bearing ring, a first row of axial load rollers and a second row of axial load rollers, which rows of axial load rollers are provided between a corresponding top roller raceway and bottom roller raceway. The top bearing ring has a top wall which extends above the first row of axial load rollers and in which at least one top entry port is provided. Furthermore, the top roller raceway of the first row of axial load rollers includes a removable raceway segment releasable attached in the top entry port. The removable raceway segment can be removed to enable access via the top entry port to the first row of axial load rollers to remove axial load rollers in a substantially vertical direction.

Hoisting crane and method for refurbishing such a hoisting crane

The present invention relates to a marine pipeline installation system for laying an offshore pipeline and/or installing a subsea riser, said system being adapted to carry out the reel lay method and the J-lay method. The system comprises a vessel with a moonpool, a pipeline launch tower arranged on the vessel, a pipeline guide at an elevated position on said tower for guiding said pipeline to a pipeline launch trajectory along said tower, and one or more tensioners. The support assembly of at least one tensioner frame is adapted to allow for displacement of the tensioner frame between an active position, wherein the pipeline launch trajectory extends through the tensioner frame between the tracks, so that the tracks can engage on a pipeline, and a retracted and non-operable position. The system further comprises a J-Lay installation.

Marine pipeline installation system and methods

A vessel () for handling subsea equipment comprising a subsea equipment hoist system including a winch and a hoist cable () for lowering and retrieving subsea equipment () in a hoist area of the vessel, a subsea equipment motion restraining and guidance system for restraining subsea equipment motion relative to the vessel in the hoist area. The subsea equipment motion restraining and guidance system includes a main trolley (), an auxiliary trolley () and a vertical trolley guide structure () mounted on the hull of the vessel that allows for vertical travel of the trolleys and further a top end engagement member (), which is movably supported by said main trolley and which is adapted to engage on a top end of the subsea equipment, and one or more rail engaging members () mounted on said auxiliary trolley, each adapted to engage on a vertical rail () mounted on said subsea equipment as said subsea equipment passes vertically by said auxiliary trolley.

Vessel comprising a subsea equipment motion restraining and guidance system

Marine pipelaying method and system for installing an offshore pipeline () that includes one or more accessories (). The method includes the steps of providing a vessel (), launching the pipeline () in a firing line from the vessel () in the direction of the seabed, engaging the pipeline () with a clamping device () that is connected to the vessel () and adapted to support the weight of the previously launched pipeline (), and moving the accessory () into the firing line to a position above the clamping device (). Then the accessory () is connected to the pipeline () above the clamping () device while the pipeline () is held by the clamping device () Follow that the accessory () and the launched pipeline () connected thereto and releasably secured to a controlled load hoisting device () and the weight of the accessory () and the launched pipeline () connected thereto are transferred from the clamping device () to the controlled load hoisting device () while the accessory () and the launched pipeline () connected thereto remain in the firing line. Finally the clamping device () is disengaged from the pipeline () and moved away from firing line. Then the accessory () and the launched pipeline () connected thereto are lowered along the firing line by the controlled load hoisting device ().

Marine pipelaying system and method for installing an offshore pipeline that includes one or more accessories

A marine pipeline installation system for laying an offshore pipeline and/or installing a subsea riser, the system at least allowing to carry out the reel lay method, wherein the system comprises: The support assembly of at least one tensioner frame, preferably of all tensioner frames, is adapted to allow for displacement of the tensioner frame between an active position, wherein the pipeline launch trajectory extends through the tensioner frame between the tracks, so that the tracks can engage on a pipeline, and a retracted and non-operable position.

The marine pipelaying system for vertical or near vertical laying of an offshore pipeline () includes a main supporting structure (); a pipe connecting station (), wherein a pipe section () is connected to an uppermost end () of a previously launched pipeline; a static clamp () adapted for releasably securing the uppermost end of the previously launched pipeline, wherein the static clamp is adapted to support the weight of the&#x3c;-&#x3e;previously launched pipeline; a mobile clamp () adapted for releasably securing the previously launched pipeline at a position below the static clamp, wherein the mobile clamp is adapted to support the weight of the offshore pipeline as the offshore pipeline is released from the static clamp; and a mobile clamp hoist () connected to the mobile clamp.

Marine pipelay system and method

The marine pipelaying system for vertical or near vertical laying of an offshore pipeline includes a main supporting structure; a pipe connecting station, wherein a pipe section is connected to an uppermost end of a previously launched pipeline; a static clamp adapted for releasably securing the uppermost end of the previously launched pipeline, wherein the static clamp is adapted to support the weight of the previously launched pipeline; a mobile clamp adapted for releasably securing the previously launched pipeline at a position below the static clamp, wherein the mobile clamp is adapted to support the weight of the offshore pipeline as the offshore pipeline is released from the static clamp; and a mobile clamp hoist connected to the mobile clamp.

The invention is vessel with a tower adapted to be inclined for handling of tubulars mad of a vessel, a tower with a mast that can be inclined, a pipe reel for storing passing tubulars, a strut with a sleeve for engaging and enabling tower inclination, and a tensioner mounted moveably on the mast for receiving the tubular wherein the tensioner is made of two connectors connected to the mast, a frame that engages the connectors, two track bodies that engage the tensioner frame and the tubular, and an adjustable vertical support adapted to modify the relationship between the force transmitted by the adjustable vertical support onto the tensioner and the motion of the tensioner relative to the mast.

System for overload protection for pipe or cable laying structures

The invention is a hoisting device for a vessel a base structure provided with fixed cable blocks with pulleys; a trolley connected to a cable pulley block and a mechanism for gripping a load; a compensator a hoisting mechanism with a hoisting cable and a winch, wherein the hoisting cable is guided over the cable pulleys connected to the base structure and is adapted to move the trolley relative to the base structure with the aid of the winch; a secondary compensator with fixed cable blocks and pulleys connected to the base; a cable pulley set connected to the compensator end; a connection cable connected to a stationary section and a movable cable block with pulleys; a hoist connected to the vessel; a connecting cable guided over pulleys; and movable cable block and is adapted to move the compensator second end with the aid of the secondary hoisting mechanism.

Compensation and hoisting apparatus

The invention is a hoist system for a derrick with a derrick inside, a derrick outside, and a derrick top side; a splittable block connected to the derrick top side; a hoisting cable guided through the splittable block; a moveable trolley with a trolley top side and a trolley bottom side, wherein the trolley is connected to the splittable block and wherein the moveable trolley is removably secured on the derrick; and a hoist winch adapted to pull the hoisting cable over the derrick top side and through the splittable block to move the moveable trolley relative to the derrick.

Growing community of inventors

Sugar Land, TX, United States of America

Anne Klaas De Groot