Suspension device for riser and its suspension method

A suspension device and riser technology, which is applied in the direction of earthwork drilling, wellbore/well components, etc., can solve the problems of complex and time-consuming operation procedures, poor operability, etc., to ensure functional reliability and stability, and avoid dynamic compression , the effect of simple operation

Active Publication Date: 2016-08-24
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no suspension device specially suitable for risers. The suspension of risers is usually completed with the installation tools of the riser. Operation, operation procedures are complicated and time-consuming, and operability is poor in emergency situations

Method used

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  • Suspension device for riser and its suspension method
  • Suspension device for riser and its suspension method
  • Suspension device for riser and its suspension method

Examples

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 , figure 2 As shown, the present invention comprises a conical shell type support 1, offers a through hole 10 at the bottom of the support 1, and its top is coaxially fastened to a hollow disk-shaped suspension chuck 2, along the inner wall of the suspension chuck 2 and located at Four pins 20 that can expand and contract in the radial direction are arranged on the horizontal and vertical central axes, the lower surface of the suspension chuck 2 and the cylinder body 30 of a hydraulic cylinder 3 are hinged at both ends of the horizontal central axis, each cylinder A piston connecting rod 31 is inserted in the body 30, and the upper and lower chambers of the cylinder body 30 are filled with high-pressure liquid with pressure difference. The bottom ends of the two piston connecting rods 31 are hinged to another suspension with ...

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PUM

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Abstract

The invention relates to a hanging device for water isolating pipes and a hanging method thereof. The hanging device is characterized by comprising a shell type bracket provided with a through hole in a bottom end, a hollow hanging chuck coaxially and tightly connected to the upper end of the bracket, a plurality of hydraulic cylinders evenly hinged to the lower surface of the hanging chuck, a second hanging chuck hinged to piston connecting rods of the hydraulic cylinders and having the same structure with the hanging chuck, and a water isolating pipe string hinged on the hanging chuck and / or the second hanging chuck, wherein a plurality of pins extending in the radial direction are evenly distributed on the inner walls of the hanging chuck and the second hanging chuck; and hydraulic fluid with pressure difference are fully filled in two cavities of the hydraulic cylinders. The hanging device has such advantages as simple operation and strong operability under emergency condition.

Description

technical field [0001] The invention relates to a suspension device, in particular to a suspension device for a water riser and a suspension method thereof. Background technique [0002] Typhoons and other emergencies may be encountered during deepwater drilling and completion operations. At this time, for floating drilling platforms that are undergoing drilling and completion operations, it is necessary to initiate typhoon emergency measures, that is, stop deepwater drilling and completion operations and recover all drilling compartments. Hose, evacuate floating rig. In special cases, such as when the water depth is deep (more than 3000m), the recovery time of the riser may exceed 5 days. Before the typhoon comes, the wind force and trajectory in the next 4 to 5 days can generally be predicted through the weather forecast. Therefore, there may be no Time to fully recover the riser. Another example is some local typhoons or sudden typhoons in the South China Sea, which wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/00
CPCE21B23/01
Inventor 盛磊祥许亮斌王荣耀蒋世全李迅科
Owner CHINA NAT OFFSHORE OIL CORP
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