Development of Drilling and Casing Technologies for Permafrost Areas
Abstract 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, gri...
| Published in: | IOP Conference Series: Earth and Environmental Science |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
IOP Publishing
2019
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1088/1755-1315/272/2/022078 https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022078/pdf https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022078 |
| Summary: | Abstract 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. |
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