Down-hole, production pump and circulation system
First Claim
1. A down-hole circulation tool for use down-hole in a production well having a production tubing string and an inner plunger carried by a sucker rod string in association with a reciprocating pumping system on the surface, comprising:
- a basic body attachable to the bottom of the tubing string which remains substantially stationary in use;
two ball valves in line, one above the other, associated with said basic body, each having a ball and a valve seat;
a lower projector located at the bottom area of the tool which is projectable through said valve seat of said lower valve, unseating its ball; and
an inner body which is rotatable about a longitudinally axis and longitudinally moveable with respect to said basic body and is temporarily attachable to the bottom of the plunger through a tool section;
the relative longitudinal positioning of said inner body with respect to said basic body defining two, distinctively different dispositions for the tool, a usual, closed, production disposition in which production flow pumping takes place using the reciprocating pump, and an injection, open disposition in which fluids from the surface are injected down the production tubing through the down-hole tool on an intermittent basis.
1 Assignment
0 Petitions
Accused Products
Abstract
A production pump & circulation tool (1, FIG. 1) used down-hole on the end of a production string (FIG. 10) including: a combined traveling valve assembly bottom connector (10) and fishing tool section (20) which engages gripping pins (51) for twisting the tool and is associated with a traveling ball valve (11/12); a sleeve (30); peripherally spaced, "J" slots (43) in an outer member (40) in which guide pins (52) move changing the tool'"'"'s state with rotation about a longitudinal axis; a biasing spring (81); a standing valve assembly (50) which carries at its top a projector for unseating the traveling ball valve and to which the pins are attached and which encloses a standing valve ball (50A) and carries its seat (50B); a combined bushing (60) and top spring seat (70); a spring housing (80); and a standing valve projector (90) which can unseat the standing ball from its valve seat when the assembly 50 is lowered against the force of the spring. A pumping "valve locked closed" disposition (FIGS. 10B-D) and an injection "valve locked open" disposition (FIG. 10E). An atomizer (270) is utilized and/or a standing valve injector (320) and/or a projector channel (93) in the lower standing valve projector (90) are utilized for injecting diluents. The tool barrel and plunger with a non-abrasive outer "lining" and a non-corrosive inner "lining".
48 Citations
14 Claims
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1. A down-hole circulation tool for use down-hole in a production well having a production tubing string and an inner plunger carried by a sucker rod string in association with a reciprocating pumping system on the surface, comprising:
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a basic body attachable to the bottom of the tubing string which remains substantially stationary in use; two ball valves in line, one above the other, associated with said basic body, each having a ball and a valve seat; a lower projector located at the bottom area of the tool which is projectable through said valve seat of said lower valve, unseating its ball; and an inner body which is rotatable about a longitudinally axis and longitudinally moveable with respect to said basic body and is temporarily attachable to the bottom of the plunger through a tool section; the relative longitudinal positioning of said inner body with respect to said basic body defining two, distinctively different dispositions for the tool, a usual, closed, production disposition in which production flow pumping takes place using the reciprocating pump, and an injection, open disposition in which fluids from the surface are injected down the production tubing through the down-hole tool on an intermittent basis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of down-hole circulation in a production well including a production tubing string using a reciprocating pumping system on the surface to pump the production fluid from down in the well using a plunger, comprising the following steps:
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a) providing a tool down-hole at the bottom of the production string, having a basic body attachable to the bottom of the tubing string which remains substantially stationary in use; two ball valves in line, one above the other, associated with said basic body; and an inner body which is rotatable about a longitudinally axis and longitudinally moveable with respect to said basic body; b) changing the relative longitudinal positioning of said inner body with respect to said basic body to change the tool between two, distinctively different dispositions, namely, a usual, closed, production disposition in which production flow pumping takes place using the reciprocating pumping system, and an activation, open disposition in which fluids from the surface are injected down the production tubing string through the down-hole tool on an intermittent basis; and c) using a tool attached to the bottom of the plunger to temporarily engage the top of said inner body and rotating the engaged top of said inner body with respect to a longitudinal axis with respect to said basic body, changing the tool'"'"'s disposition. - View Dependent Claims (11, 12, 13, 14)
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Specification