DEVICE FOR HERMETIZATION OF WELL HEAD Russian patent published in 1997 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this relates to devices intended for preventing splashing, overflowing of well liquid primarily at repairing of injection wells. Device has body with flanges at its ends. Sealing members are located along body axis with possibility for creating internal space between them which is communicating with primary radial passages made in body. Device is also provided with housing which is installed concentrically and hermetically relative to body. Pipe connection for compressed air supply is also provided. Sealing members create hermetic chambers with body. These chambers are connected with source of compressed air supply through secondary radial passages made in body and housing, through pipe union and distributor unit. Primary radial passages are connected through circular groove which is made in body and covered by housing, and through hole made in housing for communication with pipe unions to branch out liquid to collector. Sealing members are less wearing, ensure protection of environment from pollution by aggressive mineralized medium or petroleum products outpouring at round-trip operations in injection wells and at drilling wells. EFFECT: high efficiency. 1 dwg