| 摘要 |
FIELD: oil and gas producing industry, particularly wellhead connections for steam-injection wells. ^ SUBSTANCE: column head comprises two detachable bodies, namely lower body and upper body. Installed on lower body are rings, flexible collars and axle box. Connection means are formed as fixing members, which seal production column by flexible collars. Production column is connected to upper body to prevent column damage and to seal tubular annulus for preventing coolant outburst during free motion of production column due to linear extension thereof when coolant is fed into the column. ^ EFFECT: widened column head capabilities. ^ 1 ex |
