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Manufacturing method of offshore oil drilling derrick

A technology for offshore oil and drilling rigs, which is used in manufacturing tools, metal processing equipment, welding equipment, etc. to reduce the workload of secondary welding in workshops, reduce site occupation time, and improve efficiency.

Active Publication Date: 2012-07-04
SHANGHAI YANGDONG STEEL STRUCTURE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a new offshore oil drilling rig manufacturing method for the deficiencies in the existing offshore oil rig manufacturing methods

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  • Manufacturing method of offshore oil drilling derrick
  • Manufacturing method of offshore oil drilling derrick
  • Manufacturing method of offshore oil drilling derrick

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Experimental program
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Embodiment Construction

[0009] The present invention will be described in detail below in conjunction with specific embodiments.

[0010] Offshore oil drilling rig, the main structure is a tower support structure. Taking the 800-ton twin-tower derrick as an example, the entire tower: the bottom is 18.3x24.4 meters, the top is 6.1x18.3 meters, and the height is 61 meters.

[0011] Equipment steel structures are divided into primary components (P pieces), secondary components (S pieces), and miscellaneous components (M pieces) according to their importance, and are divided into primary structures and auxiliary structures according to load-bearing types.

[0012] The main structure includes: main legs, beams, supports, equipment beams and sky frame, guide rails, guide rail supports, etc. The main components are mainly composed of H-shaped steel, welded BH steel, welded BOX beam, welded angle steel, welded channel steel, and various thick steel plates. The thickest steel plate material used is 120mm, a...

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Abstract

The invention discloses a manufacturing method of an offshore oil drilling derrick. The manufacturing method is characterized in that, when members are manufactured, in addition to a flange end plate with connection angles in two directions, a large baseplate connected with a ship body, a top plate connected with a crownblock beam and a small flange plate required for adjusting a guide track which need to reserve welding movable ports before pre-assembly, other flange joints are welded 100% without reserving the movable ports; and when the pre-assembly is performed, a temporary piece is adopted for positioning outside the reserved movable ports, backing welding is not performed on the joints, and all the members are sent into a workshop for cleaning and welding after the pre-assembly, so that welded transverse cracks can be reduced. Compared with the prior art, the manufacturing method disclosed by the invention can improve efficacy, realize energy conservation and environmental protection, reduce labor consumption, simultaneously reduce production material consumption and electric consumption, save energy cost and eliminate the setup of an outfield welding protection device.

Description

technical field [0001] The invention relates to a manufacturing method of an offshore oil drilling derrick. Background technique [0002] In the traditional manufacturing method of offshore oil rigs, due to the difficulty in controlling the accumulated manufacturing errors and the uncertain factors caused by the size of the drawings, it is difficult to adjust the positioning size during the pre-assembly process, and it is necessary to leave a live hole during component manufacturing. The customer requires that before the overall pre-assembly of the derrick in the factory, the flange welding joints on both sides of the on-site installation bolt connection are reserved for non-welding. After the overall pre-assembly of the derrick in the factory, before the components are disassembled, the welding amount of the welding joints reserved for non-welding shall not be less than 50% at the pre-assembly site, and then transferred to the factory workshop for further welding. The disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
Inventor 王斌胡明安
Owner SHANGHAI YANGDONG STEEL STRUCTURE
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