| 发明名称 |
CASING PIPE FOR WELLS IN PERMAFROST INTERVAL |
| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: casing pipe (1) has external surface, which generatrix in cross-section is made as protrusions and depressions of triangular shape or as a wavy line.EFFECT: prevention of casing strings crushing in case of permafrost rock refreezing in conditions of well shutdown or temporary abandonment.2 dwg |
| 申请公布号 |
RU2533520(C1) |
申请公布日期 |
2014.11.20 |
| 申请号 |
RU20130159265 |
申请日期 |
2013.12.30 |
| 申请人 |
KOPYLOV GENNADIJ ALEKSEEVICH;FEDOROVA NATAL'JA GRIGOR'EVNA |
发明人 |
KOPYLOV GENNADIJ ALEKSEEVICH;FEDOROVA NATAL'JA GRIGOR'EVNA |
| 分类号 |
E21B17/00 |
主分类号 |
E21B17/00 |
| 代理机构 |
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