Device and method for leakage volume detection simulating oil well pump work environment

Abstract

The invention provides a device and a method for leakage volume detection simulating oil well pump work environment. The device comprises a sliding support, a wellbore simulation system, a fluid supply system, and a thermal insulation system. The sliding support can realize to measure corresponding static leakage volume of an oil well pump. The wellbore simulation system is characterized by simulating a wellbore. A simulated wellbore is internally provided with a to-be-checked oil well pump, and a liquid inlet is connected with a metering device. The fluid supply system comprises a thickened oil tank, a thin oil tank, a water storage tank, and a gas storage tank. The thickened oil tank, the thin oil tank, and the water storage tank are connected with a booster pump, a liquid flowmeter, a switch valve, and a liquid inlet pipeline in sequence. The booster pump increases liquid pressure to pressure of the inlet of the oil well pump. The gas storage tank is connected with a gas flowmeter and a switching valve in sequence, and is communicated with the liquid inlet pipeline. The tail end of the pipeline is connected with an air release valve. The thermal insulation system provides a power supply through a distribution box, a temperature controller adjusts temperature, and the system is connected with the simulated wellbore through a cable. The device and the method can measure leakage volume under real formation environment of the oil well pump by simulating complex formation fluid.

Description

technical field [0001] The invention belongs to the technical field of oil well pump performance detection, and specifically relates to a leak detection device and method for simulating the working environment of the oil well pump. Background technique [0002] The oil pump is the core component of the rod pumping system, which is mainly used to lift the crude oil underground to the surface. In view of the fact that the leakage volume of the oil well pump is an important technical index to evaluate the performance of the oil well pump, it is very important to detect the leakage performance of the oil well pump. In the actual wellbore, the environment where the oil pump is located is high temperature, high pressure, and complex fluid. However, there are mainly three problems in the current detection technology: (1) Most of the oil well pumps are tested at room temperature, and the temperature has an influence on the liquid properties in the wellbore. (2) The test medium is c...

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Problems solved by technology

In the actual wellbore, the environment where the oil pump is located is high temperature, high pressure, and complex fluid. However, there are mainly three problems in the current detection technology: (1) Most of the oil well pumps are tested at room temperature, and the temperature has an influence on the liquid properties in the wellbore. (2) The test medium is clean water or light diesel oil, while the fluid in the actual formation is oil-gas-water three-phase; (3) During the test and detection, the oil well pump is at a single horizontal angle, and the plunger is not centered in the pump barrel, which will Affects the measurement of leakage

[0003] At present, there are a variety of leakage detection standards in the industry, such as GBT 18307-2008 specification for oil well pumps and their components, SYT5059-2009 combined pump barrel and tubular oil well pumps, and SYT 5872-2011 C oil well pump maintenance regulations. They are all measured at the horizontal position of the oil well pump, and the test medium is No. 10 light diesel oil at a temperature of 20°C. It is difficult to truly simulate the leakage of formation fluid through the oil well pump in the actual wellbore; in July 2013, the Journal of Jilin Institute of Chemical Technology " Static Leakage Test and Analysis of Oil Well Pump "Influence of two kinds of clean water on the leakage of horizontally placed oil well pump at 20℃ and 60℃

This article considers the influence of temperature on the oil pump leakage on the basis of the original standard, but due to the large gap between the test medium clean water and the actual formation fluid properties, it is difficult to meet the detection requirements for the oil well pump leakage

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