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Recoil control method and system for deepwater riser system and hardware equipment

A deepwater riser and control method technology, applied in drilling equipment, drilling automatic control system, drilling pipe, etc., can solve the problems of less research on recoil control and failure to reflect many characteristics of the riser system recoil process, etc.

Pending Publication Date: 2022-07-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few studies on recoil control of the existing riser system, and the existing research has greatly simplified the problem, which cannot reflect many characteristics of the recoil process of the riser system

Method used

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  • Recoil control method and system for deepwater riser system and hardware equipment
  • Recoil control method and system for deepwater riser system and hardware equipment
  • Recoil control method and system for deepwater riser system and hardware equipment

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Embodiment Construction

[0033] In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings that need to be used in the embodiments of the present invention. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

[0034] figure 1 A schematic diagram of the physical model of the recoil process of the deepwater riser system, figure 1 The low pressure nitrogen cylinder 1, the high pressure air cylinder 2, the flexible joint 3, the platform 4, the hydraulic cylinder 5, the piston rod 6, the expansion joint 7, the riser 8, the bottom riser assembly 9, the blowout preventer 11, the wellhead are shown. 12. In addition, the spilled drilling fluid 10 and the waves 14 and ocean currents 13 in the marine environment are also illustrated.

[0035] Among them, the low-pressure nitrogen cylinder, high-pressure air cylinder, hydraulic cylinder, and piston ...

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Abstract

The invention relates to the technical field of offshore oil and gas development, and discloses a recoil control method and system for a deepwater riser system and hardware equipment. The method comprises the following steps: firstly, carrying out simplified equivalence on the deepwater riser system to obtain a three-dimensional equivalent physical model of the deepwater riser system, establishing a mathematical model for describing the dynamic state of the deepwater riser system according to the three-dimensional equivalent physical model of the deepwater riser system, and then determining constraint conditions of recoil control of the deepwater riser system. And finally, according to the mathematical model for describing the dynamic state of the deepwater riser system, considering the constraint condition of backflushing control, and combining with the backflushing control strategy to design the deepwater riser system backflushing controller. The recoil control method of the deepwater marine riser system is closer to engineering practice.

Description

technical field [0001] The invention relates to the technical field of offshore oil and gas development, in particular to a deep-water riser system recoil control method, system and hardware equipment. Background technique [0002] The riser system is an important equipment in offshore oil and gas engineering, and undertakes the transportation of oil and gas and drilling tools. The riser system is usually connected to floating platforms and subsea wellheads. When the offshore oil and gas development operation encounters an emergency, the riser and the subsea wellhead need to be rescued urgently. After the emergency release, the riser system moves quickly and enters the recoil process. If the recoil process of the riser system is not properly controlled, accidents such as collision and compression are likely to occur, resulting in huge economic losses and even endangering the safety of operators. [0003] During the recoil process of the riser system, the motion of the flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/00E21B44/00G06F30/23G06F30/28G06F119/14G06F113/08G06F111/04
CPCE21B19/006E21B44/00G06F30/23G06F30/28G06F2119/14G06F2113/08G06F2111/04Y02T90/00
Inventor 刘秀全刘兆伟王向磊畅元江陈国明
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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