FIELD: oil production and geological prospecting industries.
SUBSTANCE: split flange comprises two flange halves and rubber sealing means. Flange is provided with chain clutch to be mounted in casing pipe so that the clutch encloses casing pipe. Chain clutch includes pull chain and holders connected to chain ends. Chain links touching casing pipe are sharpened so that 60° angle is defined at chain link tops. Chain clutch is adapted to receive flange halves with split rubber sealing means pressed in annular recess thereof for following flange halves connection with each other along jointing plane.
EFFECT: decreased labor inputs and increased efficiency of device usage.
6 dwg
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