No tap tool for downhole reciprocating pumps

Wells – With eduction pump or plunger – Having sediment trap or deflector

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Details

166 68, 417545, E21B 4300, F04B 2104

Patent

active

060680520

ABSTRACT:
A tool which eliminates the need for "tapping" in downhole reciprocating pump applications is connectable between the last sucker rod of a sucker rod string and the downhole pump. The tool has a cylinder with a closed end and an internal annular seat proximate an open end houses a piston whch reciprocates slidably within the cylinder and is free to rotate within the cylinder. The travel of the piston is limited in one direction by the closed end of the cylinder and in the opposite direction by the seat. The closed end of the cylinder is externally adapted for connection of the tool between the last sucker rod of the sucker rod string and the pump and the piston has a portion extending through the open end of the cylinder which is also adapted for connection of the tool between the last sucker rod of the sucker rod string and the pump. At least one aperture is provided through a closed end side wall of the cylinder and through an open end side wall of the cylinder so that well fluid can be vented from the cylinder as the piston reciprocates.

REFERENCES:
patent: 3021794 (1962-02-01), Knox
patent: 3376826 (1968-04-01), Crowe
patent: 3598206 (1971-08-01), Hennells
patent: 4571162 (1986-02-01), Knox
patent: 4621693 (1986-11-01), Caldwell et al.
patent: 4963078 (1990-10-01), Agee
patent: 5236038 (1993-08-01), Clemishire
Brown et al, The Technology of Artificail Lift Methods, pp10-16, , Production Publishing Co., 1977.

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