Offshore floating drilling riser flexible hanger

A flexible suspension and riser technology, applied in the direction of drill pipe, drilling equipment, drill pipe, etc., can solve the problems that are not conducive to the safety of personnel, threaten the safety of riser suspension, and cumbersome operation, so as to avoid the overload of the suspension beam and shorten the suspension operation Time, the effect of simplifying the suspension operation steps

Active Publication Date: 2018-05-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during soft suspension, the heave motion amplitude of the drilling platform cannot exceed the stroke limit of the expansion joint or the tensioner, otherwise the safety of the riser suspension will be threatened
At the same time, the use of soft suspension requires switching from hard suspension to soft suspension, which is cumbersome to operate and is not conducive to personnel safety.

Method used

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  • Offshore floating drilling riser flexible hanger
  • Offshore floating drilling riser flexible hanger

Examples

Experimental program
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Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] As shown in the drawings, the chuck 2 is composed of jaws, jaw box and upper plate. The jaws and their driving hydraulic cylinders are placed in the jaw box. The claws can be stretched and extended to lock and release the riser string. The supporting jaws of the claw box are connected with the upper plate; the universal joint 3 is mainly composed of rubber columns and the lower plate, and the lower plate is connected with the bottom plate. The upper end is closer to the center of the universal joint 3 than the lower end, and the chuck 2 is embedded on the universal joint 3 to support the riser 1 to realize horizontal rotation within a certain range. The heave compensation device is mainly composed of an active compensation cylinder 5, a passive compensation cylinder 6, a sprocket 9 and a guide mechanism 7. The active compensation cylinder 5 and the passive compe...

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Abstract

The invention discloses a flexible hanger for a marine drilling riser, which mainly includes a chuck-universal joint assembly, a motion compensation device, a guide mechanism and a hydraulic power unit. The chuck-universal joint assembly adopts a mosaic structure combination, which can not only realize the suspension and lifting of the riser string, but also ensure that the chuck can swing at a certain angle with the riser. The motion compensation device adopts the extended range motion compensation The hydraulic cylinder drives the chuck-universal joint assembly to perform compensation movements, and the guide mechanism slides and cooperates with the guide rail through the slider installed on the chuck-universal joint assembly to ensure that the chuck-universal joint assembly moves along the guide rail. Linear motion, and bear the radial load of the riser; the hydraulic power unit provides power and control for the whole set. On the basis of meeting the conventional suspension and lifting operation functions, the structural height of the system is reduced, the operation steps of the riser suspension are simplified, the suspension time is shortened, and the variation range of the load inside the riser is reduced, and the suspension of the riser is improved. performance and reliability.

Description

technical field [0001] The invention relates to a hydraulic control system characterized by structural improvement and electro-hydraulic control technology, in particular to a flexible hanger for a water riser of an ocean drilling platform. Background technique [0002] As oil exploration and development move towards the ocean, especially the deep sea, the offshore floating drilling platform has become one of the important equipments in the oil industry. Drilling riser is an important but weak link in offshore drilling equipment, which has the characteristics of high technology, high investment and high risk. Due to the complexity of the operation process and load, the large deformation nonlinearity of its own structure, the uncertainty of the analysis method, the abstraction of the actual response and other factors, the drilling riser has become the difficulty and focus of offshore oil equipment. Ensuring the safety of drilling risers is an inevitable requirement for offsh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/01E21B19/10E21B34/08E21B41/00
CPCE21B19/10E21B23/01E21B34/08E21B41/0007
Inventor 张彦廷王志坤张英杰黄张聪黄鲁蒙张长齐葛政何召山许亮斌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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