Apparatus and method for testing a well

Details Apparatus and method for testing a well Apparatus and method for testing a well

E - Fixed Constructions

21

B

166/5

E21B 49/08 (2006.01) E21B 33/124 (2006.01) E21B 43/12 (2006.01)

Patent

CA 1335877

In general, pumps for use in oil wells are complicated structures which are difficult to produce and/or install. A simple pump, which can readily be incorporated in a well string includes a tubular barrel, a bottom sub carrying a fixed valve on the lower end of the barrel, an internally splined sleeve on the supper end of the barrel, and a splined plunger carrying a second, moving valve slidable in the sleeve and barrel. Reciprocation of the plunger causes alternate simultaneous opening of the bottom valve and closing of the top valve, and closing of the bottom valve and opening of the top valve to pump fluids up the well string. The valves are structurally similar and each contains two valves for a tight seal and efficient operation.

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