«Onshore and offshore oil and gas well construction»

Development of a closed circulation system for flushing wells by gas-liquid mixtures

UDC: 624.131.34
DOI: -

Authors:

¹ Siberian Federal University, Krasnoyarsk, Russia

Keywords: aerodynamic defoamer, gas-liquid mixtures, foam generator, closed circulation, drilling, Laval nozzle, foaming solution, ecological balance, foam separation

Annotation:

The article substantiates the relevance of using gas-liquid mixtures when drilling wells for various purposes and the necessity of developing technical means that accompany drilling of wells with bottom hole cleaning using gas-liquid mixtures. The high-quality implementation of the well drilling technology that envisages cleaning by gas-liquid mixtures requires reliable technical support of all operations. In addition to foam generation, the design of the defoaming process is also important. Unlike other methods of foam generating and extinguishing, the mechanical method is reliable and predictable. The use of mechanical devices of generating and extinguishing gas-liquid mixtures makes it possible to guarantee that the parameters of the circulation system are kept constant. Based on the research conducted, a closed circulation system for gas-liquid mixtures has been developed, characterized by mobility, small dimensions, low energy intensity, versatility, high productivity and accessibility when drilling wells in various geological-technical conditions. The main advantage of the developed circulation system is the ability to perform foam generation and defoaming continuously, without loss of the necessary properties of gas-liquid mixtures as well as to ensure the repeatable use of foaming solutions without environmental pollution.

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