Test method for influence on coefficient of admission by gas etching action

Abstract

The invention discloses a test method for an influence on a coefficient of admission by gas etching action. The test method comprises the steps that a, in a producing well, during a process from a working fluid level to an oil layer, physical and chemical conditions of crude oil change continually, b, due to the fact that temperature and pressure change continually rise along with changes of a submergence degree, physical properties of each component in the crude oil change greatly, c, after a C6H14 phase in the crude oil reaches a supersaturating degree, once the pressure is suddenly decreased, the C6H14 has the strong gas etching action, a liquid phase under the original condition is converted into a gas phase, d, with increase of the well depth and increase of the pressure and temperature, the supersaturated components of the crude oil also increase, and e, the influence on the coefficient of admission by the gas etching action is obtained through recorded data. The test method for the influence on the coefficient of admission by the gas etching action is capable of rapidly achieving a test for the influence on the coefficient of admission by the gas etching action, accurate in test result and simple in test procedure, and therefore test cost is reduced.

Description

technical field [0001] The invention relates to a method for testing the influence of cavitation on the filling coefficient. Background technique [0002] The oil well pump system has a history of more than 100 years. With the rapid development of the petroleum industry, the oil well pump has developed from a simple bush pump to a multifunctional oil well pump with high pump efficiency, energy saving and adapting to different needs. [0003] Before the 20th century, the development of oil well pump technology at home and abroad was slow, and it was not until the middle of the 20th century that the whole barrel oil well pump was studied and produced simultaneously with the bushing type oil well pump. There are two technically controversial issues about oil well pumps: one is whether the whole barrel type oil well pump is better or the bushing type oil well pump is better; the other is whether it is better to have sand control grooves on the plunger or not to have sand control...

AI Technical Summary

Problems solved by technology

There are two technically controversial issues about oil well pumps: one is whether the whole cylinder type oil well pump is better or the bushing type oil well pump is better; the other is whether it is better to have sand control grooves on the plunger or no sand control grooves

The cavitation products will occupy part of the effective space in the pump chamber, reducing the filling coefficient of the pump