公开(公告)号：US10974937B2

公开(公告)日：2021-04-13

申请号：US16483364

申请日：2018-02-02

Applicant: ITREC B.V.

Inventor： Joop Roodenburg ,  Theodorus Cornelis Joanes Maria Stijnman ,  Wing Sum Lee

IPC: B66C23/62 ,  B66C23/52 ,  B66C23/82 ,  B66C23/84

Abstract: A crane housing having a substantially cylinder-shaped circumferential wall with a lower section and lower end mounted to a slew bearing of substantially the same diameter includes a boom support structure to support an inner end of a pivotal boom arranged at a front side of the crane housing. The boom support structure includes at least two box elements of each of which an end portion overlaps with and is integrated with the upper section of the circumferential wall. Oblique strengthening ribs are mounted onto and integrated with a side of the circumferential wall and extend from a respective box element end portion in an oblique downwards direction towards the lower end of the wall.

公开(公告)号：US10352113B2

公开(公告)日：2019-07-16

申请号：US15305754

申请日：2015-04-29

Applicant: ITREC B.V.

Inventor： Joop Roodenburg ,  Pieter Dirk Melis Van Duivendijk ,  Theodorus Cornelis Joanes Maria Stijnman

IPC: E21B19/10

Abstract: The invention relates to a tubular product clamp for clamping a tubular product, such as a drilling pipe, and to thus support for example a string of drilling pipes. The product clamp has a ring frame and three or more clamping devices mounted along the inside of that ring frame and around a central product passage. According to the invention each clamping device comprises a base part and a clamp part and two load transfer rollers carried by a trolley frame. The trolley frame positions the base part, the clamp part and the load transfer rollers relative to each other. The base part and clamp part define between them a track, along which the load transfer rollers roll when the clamp part is moved relative to the base part.

公开(公告)号：US12043523B2

公开(公告)日：2024-07-23

申请号：US17788236

申请日：2020-12-22

Applicant: ITREC B.V.

Inventor： Theodorus Cornelis Joanes Maria Stijnman ,  Cornelis Martinus Van Veluw

IPC: B66C23/18 ,  B66C13/08 ,  B66C23/52 ,  B66D3/08 ,  E02B17/08

CPC classification number: B66C13/08 ,  B66C23/185 ,  B66C23/52 ,  B66D3/08 ,  E02B17/08

Abstract: A crane with a pivotal boom. The crane has a first and a second main hoisting system, which main hoisting system are configured for independent operation. Each system comprises a hoisting cable, an upper sheave block, a hoisting block assembly suspended from the upper sheave block by the hoisting cable in a multiple fall configuration, and a hoisting winch. The upper sheave blocks of the first and second main hoisting systems are each independently pivotable about a common pivot axis relative to the boom. Each hoisting block assembly comprises a hoisting block body, multiple fixed sheaves that are fixed on the hoisting block body, and multiple disconnectable sheave members, each disconnectable sheave member comprising a frame and at least one sheave rotatably supported by the frame.