Optimization of technological parameters of airlift operation when drilling water wells

Abstract

Purpose. Development of a methodology for optimizing the technological parameters of the airlift operation, based on the analysis of the pressure balance in the annulus and in the drill string that occurs during drilling. Methodology. The tasks were solved by a complex research method, which includes a review and generalization of literary and patent sources, analytical studies on existing methods for optimizing the technological parameters of drilling with reverse circulation using an airlift. Findings. It has been established that in the study on the airlift circulation method during rotary drilling with reverse circulation, an important role is played by the analysis of the pressure balance arising in the course of drilling in the annulus and in the drill string. It takes into account both hydrostatic pressures and pressure losses for pumping water and water-air mixture. A technique has been developed for assessing the effect of rate of penetration on circulation parameters. Originality. For the first time, it has been shown that the analysis of the pressure balance makes it possible to establish, with a given accuracy, the average effective values of the output parameters: the density of the water-air mixture, its upward flow rate, and the air flow rate at a given velocity of the upward flow of water as it approaches the mixer. Practical value. The proposed technique makes it possible to establish the dependence of the values of the output parameters on the depth of the well, as well as the required compressor performance to provide a given drilling fluid flow rate.

A new method of oil and water well completion involving the implosion effect

“…In that connection a new installation, having no drawbacks mentioned above, was proposed, (figure 2). Initially it was intended for water supply wells [18]. An application for invention had been submitted.…”

“…Well completion involves bringing the well's production up to the maximum possible value by means of decolmatation of the productive formation near the bottom-hole area [18]. Rotary drilling is usually performed with drilling muds.…”

Selection of the Optimal Method of Intensification and Stabilization of Oil Production in the Fields of Western Kazakhstan

“…-предотвратить отложение парафинов на стенках НКТ; -увеличить межремонтный период работы подземного оборудования скважины; -сократить потери нефти, затраченные на тепловые обработки скважины; -стабилизировать работу ЭВН, ЭЦН и ШГНУ; -исключить капитальный ремонт скважины; -значительно экономить электроэнергию. Предлагаемое устройство (рисунок 1) для ликвидации гидратных и парафиновых образований в скважинах, включающее электронагреватель на многожильном кабеле, подключенный к источнику питания и имеющий возможность спуска в скважину до верхнего положения гидратных и парафиновых образований, перевода их в расплавленное состояние и продвижения в скважине, что устройство снабжено электронагревательной спиралью, медным концентратором плавления гидратных и парафиновых образований с медным стержнем, расположенным внутри электронагревательной спирали, и устройством для автоматического периодического переключения жил кабеля с однофазного на трехфазное электропитание с выдержкой во времени [12,13,14,15,16].…”

Identifying the operating features of a device for creating implosion impact on the water bearing formation

“…where Q is the flow rate of formation water; V v is the speed of its movement through the holes; ρ w -its density; α -flow coefficient -we take α = 0.67 [28]; S -total area of holes.…”