Casing connections (OKK1, OKK2, OKK3) are used to tie in the surface and production casing strings, seal the annular space between them and provide pressure monitoring. The surface casing string is supported by wedge-type casing hangers. The casing connection is equipped with packers, which allow pressure testing of the flanged joint between the tubing head body and the casing connection.
Технические характеристики
| типовые схемы | ОКК1 | ОКК2 | ОКК3 |
| Рабочее давление, МПа (psi) | 14 (2000) 21 (3000) 35 (5000) |
21 (3000) 35 (5000) |
70 (10000) |
| Условные диаметры обвязываемых колонн, мм | 140, 146, 168, 219, 245 | 140, 146, 168, 219, 245, 299, 324 | 140, 146, 168, 219, 245, 299, 324, 426 |
| Масса, кг | 350 500 550 |
1050 1500 |
