Pressure charged airlift pump

Pumps – One fluid pumped by contact or entrainment with another – Diverse pumps

Patent

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Details

417393, 417478, F04B 2308, F04B 4506, F04F 120

Patent

active

043738672

ABSTRACT:
A pumping system is described for pumping fluids, such as water with entrained mud and small rocks, out of underground cavities such as drilled wells, which can effectively remove fluids down to a level very close to the bottom of the cavity and which can operate solely by compressed air pumped down through the cavity. The system utilizes a subassembly having a pair of parallel conduit sections (44, 46) adapted to be connected onto the bottom of a drill string utilized for drilling the cavity, the drill string also having a pair of coaxially extending conduits. The subassembly includes an upper portion which has means for connection onto the drill string and terminates the first conduit of the drill string in a plenum (55). A compressed air-driven pump (62) is suspended from the upper portion. The pump sucks fluids from the bottom of the cavity and discharges them into the second conduit. Compressed air pumped down through the first conduit (46) to the plenum powers the compressed air-driven pump and aerates the fluid in the second conduit to lift it to the earth's surface.

REFERENCES:
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patent: 2339920 (1944-01-01), Eddins
patent: 2423111 (1947-07-01), O'Leary
patent: 2693760 (1954-11-01), Miller
patent: 2720836 (1955-10-01), Warren et al.
patent: 3123007 (1964-03-01), Orr
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patent: 3551076 (1970-12-01), Wilson
patent: 3672795 (1972-06-01), Arutunoff et al.
patent: 3910728 (1975-10-01), Sloan
patent: 3963377 (1976-06-01), Elliott
patent: 4076466 (1978-02-01), Swanson

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