Flange catcher

A catcher and flange technology, which is applied in pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., can solve problems such as flange collisions of submarine oil pipelines, potential safety hazards of divers, and low underwater visibility. Achieve the effect of improving safety factor and overall construction safety, shortening working time and saving working time

Inactive Publication Date: 2012-07-04
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low underwater visibility, the submarine oil pipeline is swaying, which poses a great hidden danger to the personal safety of divers. At the same time, it is also easy to cause collisions between the flanges of the submarine oil pipeline and damage the flanges.

Method used

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Examples

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Effect test

Embodiment Construction

[0016] Such as figure 1 Shown, catcher 1 of the present invention adopts steel plate and two steel columns 2 of different lengths or two bolts of different lengths to be welded into an n-shaped body, and short steel columns 2 (or short bolts) are used to be inserted in the sea pipe method The flange catcher 1 is fixed in the blue bolt hole, and a lifting lug 3 is vertically welded on the steel plate surface at the upper end of the η-shaped body. The lifting lug 3 is made of steel plate, and a hole 4 is provided on the lifting lug 3 for dismounting from the flange. Flange catch1. In actual application, a pair of flange catchers are used each time, which are respectively installed in the bolt holes at the 5:00 and 7:00 positions of the flange.

[0017] Such as figure 2 As shown, another embodiment of the catcher 1 of the present invention: the catcher 1 is an L-shaped body, and a hole 5 is arranged on the L-shaped catcher. The main body of the L-shaped body is a steel plate,...

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Abstract

A flange catcher is an n-shaped body, and the upper end of the n-shaped body is connected with a lifting lug. Two columns with different lengths of the n-shaped body are steel columns, the lifting lug is vertically connected onto a steel plate surface of the n-shaped body, and a hole is arranged on the lifting lug. The catcher can also be an L-shaped body, and a hole is arranged on the L-shaped catcher. The L-shaped body mainly comprises a steel plate, and a short column of the L-shaped body is a steel column. During connection of an oil pipeline under the ocean, a flange of the oil pipeline under the ocean is stably located on the flange catcher, a diver conveniently guides an engineering ship crane underwater to hoist and butt the oil pipeline under the ocean, a flange face of the oil pipeline under the ocean is effectively protected from damage, operation time is saved, and working efficiency is improved. Besides, underwater working time is shortened for the diver, and safety factor of underwater operation and integral construction safety are improved for the diver.

Description

technical field [0001] The invention relates to pipeline flanges, in particular to a flange catcher for underwater butt joint of seabed oil pipeline flanges. It belongs to the field of marine engineering technology. Background technique [0002] In offshore oil and gas development projects, it is necessary to lay submarine oil pipelines on the seabed. Common subsea oil pipelines include: subsea flat pipes, drilling platform risers, and expansion elbows between flat pipes and risers. The end of the submarine oil pipeline is equipped with a flange, and the flange is provided with several bolt holes. When the flange of the expansion elbow in the submarine oil pipeline is connected with the flange of the flat pipe and the flange of the riser, usually, the flange butt joint is carried out by hoisting the submarine oil pipeline by the crane of the engineering ship. Affected by wind, waves and currents, the engineering ship is bumping up and down, and the submarine oil pipeline ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/235F16L1/26
Inventor 苗春生王杰文刘贞飞刘春厚张印桐严国华
Owner CHINA NAT OFFSHORE OIL CORP
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