| 摘要 |
oil and gas producing industry; applicable in drilling of oil and gas wells on land and sea wells with surface wellheads. SUBSTANCE: guide and surface-casing are cut at calculated heights for hanging casing string. Supporting plate is installed at end of guide and surface casing. Then, the first section of casing string-anchor of rated length is run into well on drill pipes and secured. Anchor length is calculated by formula. After lifting of drill pipes, casing string is run into well, connected with anchor, tensioned for calculated value and landed on wedge hanger. Bearing bushing in this case leans against upper end of guide. Casing string is cemented in stressed-tensioned state. Anchor may be lowered into well on casing string. EFFECT: prevented axial displacement of landing flange and higher reliability of casing string hanger. 1 ex |
