Cyclone desander for wellhead of oil field

Abstract

The invention discloses a cyclone desander for a wellhead of an oil field, and particularly relates to the field of desanders. The cyclone desander for the wellhead of the oil field comprises a support, a pressure regulating valve, a barrel, connecting screw rods and a flange. A liquid inlet and a liquid outlet are arranged at the two ends of the barrel separately, the pressure regulating valve and the flange are mounted in the liquid inlet and the liquid outlet of the barrel respectively, a communication hole is formed in the bottom of the barrel, and a connecting flange, a valve, a desandingflange and a sand setting body are installed at the bottom of the barrel through connecting nuts. A set of independent self-operated pressure regulating valve without power supply at the liquid inletis arranged, through pressure changes of oil liquid at the liquid inlet, small pressure changes of the oil liquid at the liquid inlet are amplified by intelligent control of the valve and fed back totwo pressure chambers of the valve, the opening degree of a valve port is adjusted, the cyclone desander can achieve the purpose of adjusting the pressure of the oil liquid behind the valve without replacing the pipe diameter of an external connecting pipe or replacing desanders of other specifications, and the practicability of the cyclone desander is greatly increased.

Description

technical field [0001] The invention relates to the technical field of desanders, and more specifically, the invention is a cyclone type desander for oilfield wellheads. Background technique [0002] At present, in wellhead oil production and oil testing operations in oil fields, crude oil is collected underground, transported to the ground, and then transported to the oil plant by pipelines or transport vehicles. Before this process, sand removal must be carried out through a desander, otherwise the crude oil The sand particles will wear the supporting equipment such as the transport vehicle; the ordinary desander currently used is easy to block the long sand discharge hole in the sand discharge separation cylinder, so that the impurities in the oil are not completely discharged, and the sand discharge effect is poor; In the sand cavity, impurities are easy to stay and need to be cleaned frequently, which is very inconvenient to use, wastes time and low work efficiency. ...

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Problems solved by technology

[0004]However, when the above-mentioned technical solutions are actually used, there are still many shortcomings;

[0005] 1. Since the type selection of the cyclone desander must consider the amount of oil to be treated, the diameter of the external connection pipe, and the working pressure of the pipeline. Under the specific water volume and water pressure and other factors, it is necessary to select a device with a suitable model for desandering. Sand operation, and usually with the passage of production time, the oil output and oil hydraulic pressure of the oil well will inevitably change, and it is necessary to adjust the diameter of the external connection pipe or replace the desander with other specifications to adapt to the new oil pressure change. The method is time-consuming and expensive;

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