Transmitting and receiving device for temporary underwater spherical pigs in deepwater oil-gas field

Abstract

The invention discloses a transmitting and receiving device for temporary underwater spherical pigs in a deepwater oil-gas field. The transmitting and receiving device comprises a pig receiving / transmitting barrel, flanges installed at the two ends of the pig receiving / transmitting barrel respectively, an underwater diverless connector, and a drive pipeline arranged at the top of the pig receiving / transmitting barrel and driving the spherical pigs in sequence, wherein a pig retainer is installed at one end of the pig receiving / transmitting barrel, the other end of the pig receiving / transmitting barrel is connected with a pressure relief device, and a temperature and pressure monitoring device is installed on the pig receiving / transmitting barrel; and 'buffering noses' are installed at the two ends of each spherical pig, the arrangement of the spherical pigs in the pig receiving / transmitting barrel is 'pig-to-pig' arrangement, and the axis of each branch pipe of the drive pipeline is located at the junction of the two corresponding adjacent spherical pigs, so as to realize sequential transmitting and receiving of the spherical pigs. The transmitting and receiving device disclosed by the invention solves the problem of falling-off of the preloaded spherical pigs; and moreover, the transmitting and receiving device is capable of preloading the plurality of spherical pigs in one process, and controlling the spherical pigs to be intermittently transmitted in sequence, thus realizing the functions of cleaning, diameter measurement, pressure test, water removal and drying for a seabed pipeline, and greatly increasing the working efficiency.

Description

technical field [0001] The invention relates to a pigging ball launching and receiving device, in particular to a temporary underwater pigging ball launching and receiving device for a deep-water oil and gas field. Background technique [0002] The subsea production system is the basis for the development of deepwater oil and gas fields, and it is the guarantee for the smooth transportation of subsea oil and gas to the processing terminal. The underwater pigging ball launching and receiving device is an indispensable equipment for the pre-commissioning of the underwater production system and the emergency replacement of the fluid in the submarine pipeline. Different water depths, different pipeline materials, and different production requirements have a great influence on the design of underwater pigging ball launching and receiving devices. [0003] At present, an existing deep-water pigging ball launcher includes: an underwater ball launcher, which is a vertical linear st...

AI Technical Summary

Problems solved by technology

Since the pigging ball of the existing underwater pigging ball launching device must be preloaded into the serving cylinder, and the serving cylinder is a vertical structure, in order to prevent the preloaded pigging ball from falling due to its own weight, it is necessary to Additional design of self-locking device increases the complexity and maintenance probability of the device

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