Subsea manifold device with automatic launching function of pigging ball

Abstract

The invention relates to an underwater manifold device with an automatic pipe clearing ball launching function. The underwater manifold device comprises a seabed pipeline, a seabed pipeline terminal, a production main pipe, production branch pipes, a metering main pipe, metering branch pipes, an underwater Christmas tree and a ball launching barrel, wherein the seabed pipeline terminal is arranged on the seabed pipeline; the seabed pipeline terminal is connected with one end of the production main pipe through a first bridging pipe; the other end of the production main pipe is connected with the ball launching barrel through a first normally closed control valve; one end of each production branch pipe is connected with the production main pipe through a first control valve; the other end of each production branch pipe is connected with the underwater Christmas tree through a second bridging pipe; one end of the metering primary pipe is connected with the production branch pipe through a second control valve; the other end of the metering primary pipe is connected with the ball launching barrel through a second normally closed control valve; and one end of each metering branch pipe is connected with the metering main pipe through a third control valve; and the other end of each metering branch pipe is connected on the second bridging pipe between each production branch pipe and the Christmas tree.

Description

technical field [0001] The invention relates to an underwater manifold device, in particular to an underwater manifold device with the function of automatically launching a pigging ball. Background technique [0002] Offshore oil and gas fields generally transport crude oil, natural gas or produced water through submarine pipelines. In order to ensure the transmission efficiency and service life of submarine pipelines, regular pigging operations are required for submarine pipelines. The pigging operation of submarine pipelines between production platforms and from production platforms to land terminals is completed on the platform or on land, which is more convenient to operate. For the underwater production system, after the wellhead flow is collected by the underwater manifold, it is directly transported to the surrounding platform through the submarine pipeline. All production facilities are placed on the mud surface of the seabed, and the pigging operation is more compli...

AI Technical Summary

Problems solved by technology

For the underwater production system, after the wellhead flow is collected by the underwater manifold, it is directly transported to the surrounding platform through the submarine pipeline. All production facilities are placed on the mud surface of the seabed, and the pigging operation is more complicated.

Generally, the underwater production system needs to arrange support ships to assist in the pigging ball launching operation on the water surface, and use underwater robots to carry out underwater connection work, which has high operating costs and certain safety risks.

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