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Marine drilling riser connecting device, assembling method and marine riser structure

A technology for marine drilling and connecting devices, which is applied to drill pipes, drilling equipment, drill pipes, etc., can solve problems such as the contact surface of the joint and the riser not fitting, the leakage accident of the riser, and the deformation of the riser. Riser torque, promoting quick loading and unloading, good effect of axial limit effect

Active Publication Date: 2021-08-24
SICHUAN HONGHUA PETROLEUM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Risers are usually connected by threads or flanges. Under the load of the marine environment, the riser is often deformed by the radial force exerted by the waves during use, and the interface of the riser joint will be inclined after a long period of accumulation. , causing the contact surface between the joint and the riser to not fit or be damaged, and eventually lead to a leakage accident of the riser

Method used

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  • Marine drilling riser connecting device, assembling method and marine riser structure
  • Marine drilling riser connecting device, assembling method and marine riser structure
  • Marine drilling riser connecting device, assembling method and marine riser structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A connection device for an ocean drilling riser, as shown in Figure 1 to Figure 7 As shown, it includes at least two connection blocks 1 arranged at the flange connection of the riser, the connection blocks 1 are combined and assembled on the outside of the flange connection of the riser, and the inside of the connection block 1 is also provided with a useful The connecting block 1 is assembled on the flange plate 3 through the assembly groove 2 and then fixedly assembled on the flange plate 3 by bolts 4 .

[0037] In this embodiment, the split structure design of the connecting block 1 effectively promotes the efficiency of quick disassembly and assembly of the flange connection of the riser, and effectively improves the efficiency of assembly and disassembly of the riser 5 . At the same time, with the help of the design of the assembly groove 2, the assembly positioning of the flange plate 3 is effectively promoted. Through the matching of the assembly groove 2 and t...

Embodiment 2

[0043]The design different from Example 1 is the design of assembly holes and internal thread holes. As a different design scheme, specifically, the connecting block 1 is provided with two sets of assembly holes 6, which are located on the upper and lower sides of the flange plate 3. Internally threaded holes 7 corresponding to the assembly holes 6 are respectively provided on the wall, and the connecting block 1 is fixedly assembled through cooperation between the bolts 4 and the assembly holes 6 and the internally threaded holes 7 .

[0044] Specifically, the internally threaded hole 7 is radially designed along the flange 3 . In the specific description of Embodiment 1 and Embodiment 2, the radial direction is a direction perpendicular to the centerline of the flange (or, perpendicular to the centerline of the riser 5).

Embodiment 3

[0046] A marine drilling riser structure, as shown in Figure 1-7, includes a plurality of connected riser pipes 5, flanges 3 are provided at both ends of the riser pipes 5, and the flange plates of the riser pipes 5 A connection device for a marine drilling riser described in Example 1 or Example 2 is provided at the connection.

[0047] As a further design, in order to better ensure the stability of the riser and its own strength, in one specific embodiment, the flange 3 is evenly distributed with through holes 8, through which the through holes 8 An auxiliary pipe body 9 is assembled. After passing this design, the auxiliary pipe body 9 is arranged parallel to the riser 5 .

[0048] As a more optimized design, specifically, a buoyancy device 10 is provided on the outside of the riser 5, and there is a gap between both ends of the buoyancy device 10 and the connecting block 1 to facilitate the placement of auxiliary tools. In the assembly of the entire riser structure, it i...

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Abstract

The invention discloses a marine drilling riser connecting device, an assembling method and a marine riser structure, and belongs to the technical field of marine oil drilling devices. The device comprises at least two connecting blocks arranged at a flange plate connecting position of a marine riser; the connecting blocks are assembled on the outer side of the flange plate connecting position of the marine riser in a combined mode; assembling grooves used for assembling flange plates are further formed in the inner sides of the connecting blocks; and the connecting blocks are assembled on the flange plates through the assembling grooves and then are fixedly assembled on the flange plates through bolts. The problem that the contact surfaces at the connecting positions of traditional marine risers are not attached and are damaged, and finally leakage accidents of marine risers are caused is effectively solved, attachment of flange surfaces at the connecting positions of the flange plates is effectively promoted through the split design of the connecting blocks and the design of the assembling grooves, and a better axial limiting effect is provided.

Description

technical field [0001] The invention relates to a connection device, an assembly method and a riser structure for an ocean drilling riser, and belongs to the technical field of offshore oil drilling devices. Background technique [0002] The drilling riser is the weakest and most critical link between the subsea wellhead and the drillship. The drilling riser is an important part connecting the subsea wellhead and the drilling ship. Its main function is to provide a passage for the drilling fluid between the wellhead blowout preventer and the drilling ship, to support auxiliary pipelines, to guide the drilling tools, to lower and withdraw the wellhead blowout preventer group carrier, etc. [0003] Most of the risers used in offshore oil development are segmented risers, and the risers are connected through joints. Risers are usually connected by threads or flanges. Under the load of the marine environment, the riser is often deformed by the radial force exerted by the waves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/08E21B17/01
CPCE21B17/085E21B17/01
Inventor 袁娇姜月刘放俞海明高杭
Owner SICHUAN HONGHUA PETROLEUM EQUIP
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