Пути совершенствования строительства скважин в многолетнемерзлых породах

Abstract

In the process of drilling in permafrost there are a number of specific complications that often lead to serious problems: soil buckling, destruction of wellheads, collapses of the walls of wells, break and collapse of casing strings because of inefficient cementation in permafrost zone, release of gas on to the surface, griffins, etc. The above mentioned complications are predetermined by low-quality drilling and well casing. The article gives basic recommendations for successful wells drilling in permafrost conditions which are: construction of wells without descent shaft and elongated directions; drilling at low temperature drilling fluids; drilling in summer by smaller bits with subsequent expansion to the desired diameter; achieving the maximum possible business speed of well conducting.