Deepwater oil gas crossover pipe

Abstract

The invention relates to a deepwater oil gas crossover pipe. The deepwater oil gas crossover pipe is characterized in that the deepwater oil gas crossover pipe comprises a pipe body and a plurality of vortex-induced vibration abatement devices; the pipe body comprises a plurality of vertical straight pipe segments, a plurality of horizontal straight pipe segments and a plurality of bent pipe segments for connecting the vertical straight pipe segments and the horizontal straight pipe segments. The vertical straight pipe segments and the horizontal straight pipe segments are arranged in a staggered mode and located in the same plane. The pipe body is composed of a single steel pipe layer, an anticorrosion layer coated on the single steel pipe layer and a heat preservation layer arranged outside the anticorrosion layer in a sleeving mode. The vortex-induced vibration abatement devices are arranged outside all the vertical straight pipe segments and all the horizontal straight pipe segments. Each vortex-induced vibration abatement device comprises a plurality of chucks arranged outside the pipe body. All the chucks are tightly connected end to end. Each vortex-induced vibration abatement device further comprises three strakes. Each strake is arranged on the outer wall of the corresponding chuck in a spiral mode. The bottoms of the strakes stretch into spiral grooves formed in the surfaces of the chucks and fixedly bound to the surfaces of the chucks through a plurality of bandages. Each strake is provided with a plurality of gaps for limiting bandages. The deepwater oil gas crossover pipe can be widely used for connection of underwater facilities in deepwater oil-gas field development.

Description

technical field [0001] The invention relates to a deep water oil and gas jumper pipe. Background technique [0002] As one of the most critical technologies for the development of offshore oil and gas fields, the subsea production system has attracted much attention and developed rapidly due to its obvious comprehensive economic advantages in the development of deepwater oil and gas fields and marginal oil fields. In the subsea production system, the connections between subsea pipelines, Christmas trees, subsea manifolds and riser bases play a decisive role in ensuring the safe and complete operation of the entire deepwater oil and gas field. [0003] According to the prior art, in shallow water offshore oil and gas fields, the connection between the submarine pipeline and the riser facilities is realized through the expansion bend structure placed flat on the seabed. This type of expansion bend structure generally includes two to three sections of steel pipes, and each sect...

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Problems solved by technology

However, this structural form makes it have the characteristics of low natural vibration frequency and low structural damping, even under the excitation of low ocean currents on the seabed, it is still very susceptible to fatigue damage caused by vortex-induced vibration

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