Water-Based Lubrication Preventing Side Grinding Demonstration in Medium-High Water Cut Wells

Water-Based Lubrication Preventing Side Grinding Demonstration in Medium-High Water Cut Wells

In order to extend the pump inspection cycle of the seriously-eccentric-wear well, FU-4 water-based lubricant, which can lubricate the boundary and form chemical reaction film and chemical adsorption film on the tubing and pump sucker rods surface, is synthesized by using water-based lubrication theory for reference which has been widely applied in the fields of cutting, grinding and others fie...

Novel Downhole Electromagnetic Flowmeter for Oil-Water Two-Phase Flow in High-Water-Cut Oil-Producing Wells

First, the measuring principle, the weight function, and the magnetic field of the novel downhole inserted electromagnetic flowmeter (EMF) are described. Second, the basic design of the EMF is described. Third, the dynamic experiments of two EMFs in oil-water two-phase flow are carried out. The experimental errors are analyzed in detail. The experimental results show that the maximum absolute v...

Water Supply Authorities in Europe Preventing Agricultural Water Pollution

Water Supply Authorities in Europe Preventing Agricultural Water Pollution

Natural Radioactivity in Drinking Water of Drilled Wells in Zanjan, Northwestern Iran

Background: Many radioactive compounds may be released into the environment and hence into the drinking water supplies due to the human activities. Radionuclides can also enter the food chain if the contaminated water is used for drinking or irrigation purposes. Objective: To estimate the annual effective dose of natural radioactive materials like 226Ra and 40K in drinking water of wells in Zan...