DEVICE FOR INCREASE OF SERVICEABILITY OF SEALS IN MOVABLE JOINTS

摘要

FIELD: units working under high pressures of liquid, for example in deep oil and gas wells. SUBSTANCE: seal works reliably under any pressures of working fluid due to automatic control of pressure of liquid between sealing members in proportion to pressure of working fluid. Piston of movable joint has "piston-rod" pairs and cavities are provided between sealing members and under pistons of said pairs. Rod is in contact with working fluid and piston is in contact with fluid. Cavities are connected by means of passages. Calculations are made for sizes of pairs. EFFECT: enhanced reliability. 1 dwg