| 摘要 |
FIELD: oil producing industry. ^ SUBSTANCE: according to proposed method protection of discharge pipelines of oil well from solidification at abnormal oil fields, when well is shut down, annulus gate valve on wellhead equipment is opened, liquid from discharge pipeline is drained by gravity into well annulus space, and liquid is replaced by annulus gas. Before bringing well into production, annulus gate valve is closed, and communication of well annulus space with discharge pipeline through check valve installed on line connecting discharge pipeline with annulus space is provided. ^ EFFECT: improved efficiency of protection of discharge pipelines. ^ 1 dwg |
