Wells – Processes – Producing the well
Patent
1994-05-04
1997-08-12
Dang, Hoang C.
Wells
Processes
Producing the well
166105, 417444, E21B 4312
Patent
active
056556047
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, FIGS. 2A-2C) which engages griping pins (51) for twisting the tool and is associated with a traveling ball valve (11/12); a sleeve (30, FIGS. 3A-3C); peripherally spaced, "J" slots (43) in an outer member (40, FIGS. 4A-4C) in which guide pins (52) move changing the tool's state when one part is rotated about a longitudinal axis with respect to the other, causing it to longitudinally move with respect to the other under or against a biasing spring (81); a standing valve assembly (50, FIGS. 5A-5C) 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, FIGS. 6A & 6B); a spring housing (80, FIGS. 7A & 7B); and a standing valve projector (90, FIGS. 8A & 8B) which can unseat the standing ball from its valve seat when the assembly 50 is lowered against the force of the spring. When in its pumping, "valve locked closed" disposition (FIGS. 10B-D) the tool acts, similar to a standard traveling ball and standing ball valve arrangement. However, when twisted and longitudinally moved into its activation, "valve locked open" disposition (FIG. 10E), treatment fluids can be injected from the surface into the well formation without avoiding pulling the tubing (106) or sucker rod (107) strings.
REFERENCES:
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patent: 4157117 (1979-06-01), Huckaby
patent: 4573529 (1986-03-01), Reinhardt
patent: 4867242 (1989-09-01), Hart
patent: 4880062 (1989-11-01), Bland et al.
patent: 5062480 (1991-11-01), Chacin U. et al.
Descripitive Flyer of "Spears" Back-wash Tool.
Dang Hoang C.
Newton Technologies, Inc.
Pugh C. Emmett
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