Fluid pump for use in explosive bore holes

Claim 1

A fluid pump for use in explosive bore holes comprising, an elongated cylindrical first housing having upper and lower end plates, said first housing having means provided thereon to permit water to enter the interior thereof, a hydraulic motor having upper and lower ends secured in said housing adjacent the lower end thereof, a pump housing extending upwardly from said hydraulic motor within said first housing, said pump housing having a fluid intake opening means located above said hydraulic motor, a hydraulic hose means in communication with a source of hydraulic fluid under pressure and extending through the upper end plate of said first housing and thence downwardly into said first housing between said first housing and said pump housing, said hose means being fluidly connected to the upper end of said hydraulic motor, a drive shaft extending upwardly from said hydraulic motor within said pump housing, a pump stator means positioned in said pump housing, a pump rotor means connected to said drive shaft for rotation therewith and extending through said pump stator means, and a discharge line fluidly connected to said pump housing and extending through the upper end plate so that water in the bore hole will be pumped upwardly through said discharge line upon actuation of said hydraulic motor; said hydraulic motor having a cross-sectional area which substantially conforms to the inner cross-sectional area of said first housing, said pump housing having a cross-sectional area less than the cross-sectional area of said hydraulic motor and the internal cross-sectional area of said first housing and being eccentrically positioned with respect to the longitudinal axis of said first housing to provide an access space for said hydraulic hose means so that said hose means can extend through said first housing adjacent to said pump housing.