Patent EA-004893-B1 (EA)
Title: Double-cone device and pump
Inventor: STARK JOHN
IPC: F04F5/10
Filed: 2002-03-05
Abstract: 1. Double-cone device (7) for creating a pressure difference in a fluid penetrating the device, the device essentially consisting of an entry unit (29) and an exit unit (47), each of essentially hollow frustro-conical shape, and the entry unit (29) and the exit unit (47) being connected by their respective first ends of small diameter creating an orifice (45), characterised in that at least one first inlet opening (22) is provided in the exit unit in a distance from its first end, so that between the inlet opening (22) and the first end of the exit unit a diffuser section (49) of increasing cross-cut and an effective length L exists in order to decrease noise and/or wear of the double-cone device, wherein the diffuser section provides a conicity less than that of the exit cone. 2. Double-cone device (7) according to claim 1, characterised in that the conicity of the exit cone is greater than 0 degree and at most 10 degree , preferably smaller than 8 degree and even more preferred in the range of from 3 degree to 6 degree 3. Double-cone device (7) according to claim 1 or 2, characterised in that the conicity of the diffuser section (49) is greater than 0 degree and preferably in the range from 1 degree to 5 degree . 4. Double-cone device (7) according to one of claims 1 to 3, characterised in that the wall of the double-cone device comprises at least one channel (37) and that the double-cone device is closed at a first end of it, the channel (37) having an opening at the first end and at the other second end of the double-cone device, so that a liquid is movable through the channel (37) to or away from the closed end, and drain and supply conduit are attachable at the second end of the double-cone device, one to the channel (37), the other to the second end of the entry or exit unit of the double-cone device. 5. A pump arrangement (1, 60) for pumping liquids including gases from great depths, preferably from the bottom of wells like oil wells, characterised by a circuit for a working fluid, wherein the circuit comprises a supply conduit, a drain conduit, a circulating pump device (3), a double cone unit (7) and means (36) for discharging the pumped liquid, which are connected to allow a circulating fluid to circulate through pump device (3), supply conduit, double-cone device, drain conduit and pump device (3), and the discharge means (36) being arranged within one of the said conduits so that the pumped liquid inserted by the double cone into the circulating fluid stream can be recovered by the discharge means (36). 6. A pump arrangement (1, 60) according to claim 5 with a double-cone device (7), wherein the double-cone device (7) essentially consists of an entry unit (29) and an exit unit (47), each of essentially hollow frustro-conical shape, and the entry unit (29) and the exit unit (47) being connected by their respective first ends of small diameter creating an orifice (45), characterised in that at least one first inlet opening (22) is provided in the outlet unit in a distance from its first end, so that between the inlet (22) and the first end of the exit unit a section (49) of increasing cross-cut and an effective length L exists in order to decrease noise and/or wear of the double-cone device. 7. A pump arrangement (1, 60) according to claim 6 with a double-cone device (7) according to one of claims 1 to 4. 8. Use of the pump arrangement (1, 60) according to one of claims 5 to 7 for lifting objects sunk in a liquid, wherein the liquid is pumped out of the objects by the pump device, and a medium of smaller specific weight, preferably a gas, is guided by an additional conduit to the object, so that the medium occupies the volume of the pumped out liquid and the displacement of the sunk object is enhanced.