MULTIPURPOSE PULLEY FOR OIL-WELL SUCKER-ROD PUMPING UNIT Russian patent published in 2001 - IPC

FIELD: oil and gas industry; well operation. SUBSTANCE: loaded threaded joint is made in form of flexible system. Axis of loaded threaded joint is arranged in parallel with generating line of multipurpose pulley conical surface, and support surface for threaded joint ball head is made square to bolt axis. Wedges are suspended from supports arranged in side slots parallel to generating line of multipurpose pulley conical surface, wedge-lining pair being connected together. Optimum arrangement of loaded threaded joint relative to wedge connector and use of flexible system in wedge drive improve operation reliability. Connection of wedge together with replaceable lining and provision of required orientation of this pair relative to drive pulley owing to suspending of pair provide convenience in servicing. EFFECT: improved reliability, facilitated servicing. 4 dwg