Erection device

A single, reinforced plate technology, used in drilling equipment, earth-moving drilling, drill pipe, etc., can solve the problems of uneven force on risers, difficult drilling construction, easy to incline, etc., to achieve simple structure and directional Good, solve the effect of easy tilt

Active Publication Date: 2009-11-25
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
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Problems solved by technology

[0002] For offshore drilling, the riser is an essential drilling equipment. When the hammering method is used for piling, the part below the mud line is prone to inclination due to the relatively large slenderness of the riser and low lateral stiffness. In this way, the riser cannot be inserted vertically into the soil, resulting in uneven stress on the riser, which may bring difficulties to drilling construction

Method used

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Embodiment Construction

[0013] The present invention will be described in detail below with reference to the embodiments.

[0014] like Figures 1 to 3 As shown, the present invention includes a circular sleeve 1, the height of the sleeve 1 can be 0.3m, and the inner diameter is 3-5mm larger than the outer diameter of the riser, which is convenient for assembly and welding construction. The outer wall periphery of the sleeve 1 is welded with a plurality of identical reinforced plates 2 at an even interval. The reinforced plates 2 are right-angled triangular plates with a certain thickness. The same right-angled edge of each reinforced plate 2 is welded along the axial direction of the sleeve 1. , which can effectively improve the overall lateral rigidity of the riser, which is conducive to the vertical insertion of the riser into the soil. The height of the right-angle edge for welding on the stiffened plate 2 is the same as the height of the sleeve 1, the right-angle edge for non-welding on the sti...

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Abstract

The invention relates to an erection device, comprising a circular sleeve and identical right triangle reinforcement plates, the same right-angle sides of the reinforcement plates are uniformly welded on the outer wall of the sleeve at intervals along the sleeve shaft, a riser pipe penetrates through and is welded on the sleeve, the non-welding right-angle sides of the reinforcement plates are aligned with the end plane of the sleeve. The erection device has simple structure and good guidance quality, thorough solving the problem that the riser pipe under the mud line is easy to incline and bend in the offshore piling process.

Description

technical field [0001] The invention relates to offshore petroleum engineering equipment, in particular to a righting device used for righting an offshore drilling riser. Background technique [0002] For offshore drilling, the riser is an essential drilling equipment. When the hammering method is used for piling, the riser is slender and the lateral stiffness is small, and the part below the mudline is prone to tilt. In this way, the riser cannot be inserted into the soil vertically, resulting in uneven force on the riser, which may bring difficulties to drilling construction. SUMMARY OF THE INVENTION [0003] In view of the above problems, the purpose of the present invention is to provide a righting device that can smoothly and vertically insert a riser into the soil. [0004] In order to achieve the above purpose, the present invention adopts the following technical solutions: a righting device, characterized in that: it comprises a circular sleeve and a plurality of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
Inventor 姜伟刘书杰杨进
Owner CHINA NAT OFFSHORE OIL CORP
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