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Tie-in of subsea pipeline

A technology for pipelines and underwater structures, applied in the field of underwater systems, underwater components, installation of manifolds and underwater devices, installation of main pipe joints, can solve problems such as high costs, and achieve cost reduction, less hydraulic power and communication connections , Improve the effect of ship operation planning

Active Publication Date: 2019-10-01
EQUINOR ENERGY AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, all of these methods of connecting pipelines to subsea installations require considerable time, effort and cost, and many subsurface connections to be made
The extra parts and steps associated with the use of separate jumpers or crosses, among other things, lead to high costs for the installation process

Method used

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  • Tie-in of subsea pipeline
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  • Tie-in of subsea pipeline

Examples

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Embodiment Construction

[0177] For ease of understanding, like reference numerals are used to identify like structural features in various embodiments.

[0178] Where reference is made to "pipe" in the embodiments described below, it means pipes known to those skilled in the art as "rigid pipes". Figure 24 An example of such a rigid conduit 70 is illustrated in . Such rigid piping 70 typically includes an outer insulating jacket 72 with a corrosion resistant coating 71 surrounding the finished piping 73 . Finished piping 73 is generally metal piping, usually stainless steel or carbon steel. Such rigid piping is typically manufactured in 12m sections (pipe lengths) which are welded together. Although such conduits are considered rigid conduits, it will be well understood by the skilled artisan that they need not be perfectly rigid. They generally have a small amount of elastic compliance so that they can be bent a small amount, but if the tube is pushed beyond that small amount of bend then the tu...

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Abstract

A method of installing a header pipe joint (1) at a subsea structure (5) is provided, comprising providing a header pipe joint (1) having at least one valve (2) installed therein and connecting the header pipe joint (1) inline of a spool (15) or pipeline (18) prior to lowering the header pipe joint (1) to the subsea structure (5). The header pipe joint (1) is then lowered to the subsea structure (5), and the valve (2) is connected to the subsea structure (e.g. a subsea production system of the subsea structure such as a xmas tree) with a connection bridge e.g. a choke bridge (14). This provides a fluidic connection between the subsea structure and the header pipe joint. The subsea structure (5) comprises a foundation, e.g. suction anchors (11), which provide support for both a wellhead andthe header pipe joint. A subsea assembly comprising a subsea structure (5), header pipe joint (1) and connection bridge (14) is also provided.

Description

technical field [0001] The invention relates to a method for connecting an underwater pipeline to an underwater structure and an underwater system for connecting the underwater pipeline to the underwater structure. Subsea pipelines may in particular be hydrocarbon pipelines used in the oil and gas industry. In particular, the present invention relates to a method of installing manifold joints, subsea components, and a method of installing manifolds and subsea installations. Background technique [0002] Pipelines for oil and gas subsea installations, such as pipelines for the transport of hydrocarbons such as oil or gas, are typically laid along the seabed between subsea structures using laying vessels. Each subsea structure typically includes one or more "Xmas trees" (or riser bases or blowout preventers (BOPs)) each installed at the wellhead, and manifolds are typically placed between the trees and the pipelines. between. [0003] Typically, one or both ends of the pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/013F16L1/26
CPCE21B43/013F16L1/26E21B33/035
Inventor K·E·埃林森B·H·艾德森K·达尔
Owner EQUINOR ENERGY AS
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