Superimposed standing valve

A method of operating a rod pump comprising the steps of

• (a) Providing an improved superimposed standing valve comprising:
• a top cylinder with a top cylinder top and a top cylinder bottom with a central passage through the top cylinder wherein the central passage is sized to slidably receive a polished rod and is open at the top cylinder top and the top cylinder bottom wherein the top cylinder has a top cylinder diameter portion and a reduced top cylinder diameter portion;
• a main standing valve with a main valve top and a main valve bottom and formed with a recessed area surface accessible from the main valve top and separated from the main valve top by a cylindrical inner slide wall, a main valve central bore open at the main valve bottom and at the recessed area surface, and at least one opening at the recessed area surface with a passageway connecting the at least one opening to the main valve bore, wherein the top cylinder bottom is connected to the main standing valve at the recessed surface so that the central bore and the main valve central bore are aligned with one another so as to receive the polished rod;
• and
• a valve cylindrical sleeve which slides between an open position and a closed position, having a top member with a top aperture slidably disposed on the reduced top cylinder portion of the top cylinder and a cylindrical sliding portion connected to the top member and slidably disposed within the inner slide wall of the main standing valve and has a plurality of sidewall ports which are sealed by the inner slide wall when the valve cylindrical sleeve is in a closed position and are not sealed by the inner slide wall when the valve cylindrical sleeve is in the open position;
• (b) connecting the main valve bottom to the conventional rod pump wherein the conventional rod pump has a plunger within a pump cylinder and having a traveling valve and the conventional rod pump has an inlet with a standing valve and an outlet in fluid communication with the main valve bottom of the improved superimposed standing valve;
• (c) passing a first end of the polished rod through the central passage of the top cylinder and through the main valve central bore of the main standing valve and into the pump cylinder and connected to the plunger of the conventional rod pump;
• and
• (d) reciprocating the polished rod up and down to actuate the pump and the improved superimposed standing valve.