RAPID CYCLE ANNULUS PRESSURE RESPONSIVE TESTER VALVE

摘要

The present invention comprises a rapid cycle tester valve operable in response to annulus pressure. The tester valve includes a valve ball rotatable between open and closed positions through an operating mechanism which includes a ball and slot ratchet mechanism for selectively transmitting operating movement from a pressure responsive slidable valve housing through a mandrel assembly. The valve housing employs back to back check valves disposed in a longitudinal valve passage to create pressure differentials to move the valve housing in response to annulus pressure increases and decreases.