Importance

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Abstract

A rotary traveling valve for subterranean pumping system is disclosed herein. The traveling valve includes a rotary lock configured for back and forth rotary motion in response to up stroke and down stroke movements of a driver. The bottom face of the rotary lock rests against a seating face of a housing of the valve, and a fluid passage in the seating face is opened due to rotary motion of the rotary lock during a down stroke movement of the driver, and closed during an up stoke movement of the driver. The bottom face of the rotary lock is pressed against the sealing face by a back pressure spring to prevent excessive bottom pressure to cause pumping interruption due to gas and fluid blow-by through the valve. It also compensates for any wear that may take place on the two surfaces. In addition traveling valve incorporates bearing balls to minimize friction between moving parts such as driver and housing as well as between driver and rotary lock.

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First Claim