E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
103/39
E21B 43/00 (2006.01)
Patent
CA 1286150
ABSTRACT OF THE DISCLOSURE The pumping or swabbing device and apparatus of the invention utilizes an elongate barrel slidable upwardly and downwardly on an axial rod which carries a valve element for closing on a valve seat provided interiorly of the barrel to close passage through the barrel of down-hole pressure fluid and cause such fluid to raise barrel and rod of the device through a gas and oil well casing to the wellhead, where liquid above the device is pushed to discharge at the wellhead. Spring actuated detent latching elements coact with a pair of longitudinally spaced lower and upper latching recesses to hold the barrel and rod together against relative movement in lower valve-closed and upper valve-opened positions. A sealing packer encircles the barrel and a by-pass passage thereinto leading from and back into the barrel flow passage provides sealing pressure within such packer as the device rises in the well casing. A manually or pressure operated latch provides for holding the device in the wellhead as desired.
579889
Coyle Gary W.
Concoyle Oilfield Tools Inc.
Gowling Lafleur Henderson Llp
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