Patent ID: 6474962
Filing Date: 2002-11-05
Classification: F04D

Abstract:
A pump apparatus for pumping fluid from a well comprising:a) a flexible shaft with first and second ends and capable of being coiled into a circle with a minimum diameter between about one to ten feet (1â€²-10â€²); b) a drive portion operatively connected to the first end of the flexible shaft and imparting rotational movement to the shaft; c) a flexible well pipe member with first and second end portions, the well pipe member positioned over and encasing at least a portion of the flexible shaft, with the first end portion of the well pipe member being closest to the first end of the flexible shaft and the second end portion of the well pipe member being closest to the second end of the flexible shaft; d) the well pipe member and shaft forming an assembly that is capable of being coiled into a circle with a minimum diameter of between about one and ten feet (1-10) and further forming a space for transmitting fluid therethrough; e) an outlet fitting flow bore connected to the first end portion of the well pipe member, the outlet fitting having a wall portion surrounding a flow bore that enables fluid to be discharged; f) a shroud connected to the second end portion of the well pipe; and g) an axial flow inducer pump impeller at least partially seated in the shroud and operatively connected to the second end of the flexible shaft, the impeller being rotatable during pumping for effecting a transmittal of fluid from the second end portion of the well pipe member to the first end portion of the well pipe member and exiting the outlet fitting flow bore.