An underwater crude oil desanding device

Abstract

The invention relates to the technical field of offshore oil field exploitation, and is suitable for sand removal of seafloor oil well output, in particular to an underwater crude oil sand removing device. The device comprises a chemical cleaning liquid injection module, a primary separation module, a secondary separation module, a three-stage separation module, a seawater injection module and a base, the primary separation module, the secondary separation module, the third-stage separation module and the seawater injection module are connected in turn through a conveying pipeline and fixed onthe base near a seafloor oil outlet pipe junction, one end of the chemical cleaning fluid injection module is connected to an offshore oil production platform, the other end is connected with the primary separation module, the seawater injection module and the secondary separation module and the three-stage separation module are connected, and treated solid phase sand is discharged into an open sea by a three-stage jet pump. The device can carry out the crude oil sand removing operation in the seafloor oil outlet pipe junction, and does not need to transport the solid phase sand to the offshore platform through a booster pump; the content of the solid phase sand in the booster pump and an oil conveying pipeline is reduced, the service life is prolonged, and the crude oil production is improved.

Description

technical field [0001] The patent of the invention relates to the technical field of offshore oilfield exploitation, and is suitable for desanding the output of subsea oil wells, in particular to an underwater crude oil desanding device. Background technique [0002] In the process of offshore oilfield exploitation, the crude oil is pressurized by the underwater mixing pump, and then transported to the offshore platform or ship through the underwater oil pipeline for phase separation treatment. The solid phase sand and other impurities contained in the crude oil will The erosion effect of the pump and the oil pipeline will affect the external characteristics of the pump and the pipeline characteristics, and then cause wear and tear to reduce the performance and service life of the underwater mixing pump, and finally affect the crude oil production. Reducing the sand content in crude oil is very important to improve the service life of underwater mixing pumps and oil pipeline...

AI Technical Summary

Problems solved by technology

[0002] In the process of offshore oilfield exploitation, the crude oil is pressurized by the underwater mixing pump, and then transported to the offshore platform or ship through the underwater oil pipeline for phase separation treatment. The solid phase sand and other impurities contained in the crude oil will Erosion of the pump and oil pipeline will affect the external characteristics of the pump and the characteristics of the pipeline, thereby causing wear and tear to reduce the performance and service life of the underwater mixing pump, and ultimately affect the crude oil production

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