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Device and method for dismantling offshore pile pipe through reversed pulling under pressure

A pile pipe and pressure technology, which is applied in the field of offshore pile pipe pressure back-pull removal device, can solve the problems of large adaptability of work equipment, high operation risk of operators, and complicated operation process, so as to achieve low cost and high operation safety , suitable for a wide range of effects

Inactive Publication Date: 2014-04-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty of its operation lies in the complex operation process, the large adaptability of the operation tools, the high risk of the operators in the water, and the high cost.

Method used

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  • Device and method for dismantling offshore pile pipe through reversed pulling under pressure
  • Device and method for dismantling offshore pile pipe through reversed pulling under pressure
  • Device and method for dismantling offshore pile pipe through reversed pulling under pressure

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] Such as figure 1 , figure 2 , image 3 As shown, the offshore pile pipe pressure reverse pullout device includes: pile pipe pressure head 1, high-pressure pipe 2, high-pressure injection device 3; pile pipe pressure head 1, high-pressure injection device 3 are connected through high-pressure pipe 2; The pipe pressure head 1, the high-pressure pipe 2, the high-pressure injection device 3, the pile pipe to be removed 4, and the soil at the bottom of the pile 5 constitute a high-pressure reverse pullout system.

[0013] Pile pipe pressure-bearing head 1, including: head cylinder 6, sealing plate 7, first high-pressure pipe connection joint 8 and exhaust valve 9; one end of the head cylinder 6 is open, the other end is provided with a sealing plate 7, the head The cross-section of the open end of the cylinder body 6 is the same as the cross-section shape of the pile pipe 4 to be removed. The sealing plate 7 is sealed and connected with the head cylinder body 6. The seali...

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Abstract

The invention belongs to the field of oceanographic engineering, and particularly relates to a device for dismantling an offshore pile pipe through reversed pulling under pressure and a method for achieving the dismantling of the offshore pile pipe by adopting the device. The device comprises a pile pipe pressure-bearing seal head, a high pressure pipe and a high pressure filling device, wherein the pile pipe pressure-bearing seal head and the high pressure filling device are connected through the high pressure pipe. A jacking counterforce is larger than the friction resistance by using a reversed jacking method, so that an offshore decommissioned platform pile pipe is pulled out from mud, and the device and the method have the advantages of simple process, wide application range, high operation safety, lower cost and the like.

Description

technical field [0001] The invention belongs to the field of marine engineering, and in particular relates to a device for removing pile pipes under pressure reverse pull and a method for removing pile pipes at sea using the device. Background technique [0002] With the continuous deepening of offshore oil exploration and development, a large number of structures such as jacket platforms, trestle support piles, and flare support piles have been built offshore. With the passage of time, some of the structures built in the early stage underwent major changes in their functions and were abandoned, which brought hidden dangers to maritime safety and urgently needed to be demolished. At the same time, according to the requirements of relevant laws and regulations in our country: the platform owner must abandon the platform in accordance with the requirements approved by the national marine administrative department, and should abandon the platform within one year from the date o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D9/02
Inventor 曹宇光孙晓瑜胡雪扬聂文俊黄小光林红徐国强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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