Development of Drilling and Casing Technologies for Permafrost Areas

International science and technology conference "Earth science"

Atlasov, R.^1 ; M., Nikolaeva ; V., Karamzin

North-Eastern Federal University Named after M.R. Ammosov, Institute of Oil and Gas Problems SB RAS, 58 Belinskogo, 1 Oktyabrskaya St., Yakutsk

677000, Russia^1

North-Eastern Federal University Named after M.R. Ammosov, 58 Belinskogo, Yakutsk

677000, Russia^2

关键词: Drilling bit;    Drilling operation;    Low temperatures;    Permafrost area;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022078/pdf
DOI  :  10.1088/1755-1315/272/2/022078

来源: IOP

【 摘 要 】

During the well drilling operations in permafrost there are a number of specific complications that often lead to serious accidents: soil bulging, destruction of wellheads, collapses of wells walls, breakage and crushing of casing columns due to inefficient cementing in the frozen soil, griffins, etc. The above-mentioned complications are predetermined by incorrect drilling and fastening of wells. The article gives the main recommendations that contribute to the successful wells completion in permafrost: 1. Construction of wells without descending shaft and elongated directions; 2. Drilling on low-temperature drilling fluids; 3. Drilling in the summer period by drilling bit of smaller size with the subsequent reaming to the required diameter; 4. Achieving the maximum commercial speeds.