BORE HOLE JET STREAM INSTALLATION ЭМПИ-УГИС-(1-10)КД - FOR LOGGING AND TESTS OF HORISONTAL BORES Russian patent published in 2008 - IPC F04F5/54 E21B47/00 

FIELD: engines and pumps.

SUBSTANCE: invention refers to pump equipment. A bore hole stream jet comprises packer with a central channel and jet stream pump (JSP). Output of the diffuser of the JSP is connected to an annular space, and nozzle is connected to the inside cavity of a pipe column via working medium supply channel and upper and lower apertures made in a case of the JSP. A back valve is installed in a pumped out medium supply channel from the lower aperture side. A working medium flow switch, made as a movable bearing sleeve (BS) spring loaded against the case, is installed in a case of the JSP coaxially to the pipe column. Upper and lower bypass apertures and a seat for a leak proof unit (LPU) or replaceable functional insertions are made in the BS. When the BS is in upper position, the channels of working and pumped out mediums are shut by the latter. In a lower position of the BS its upper edge is located below the inlet to the working medium supply channel. Bypass apertures of the BS are connected to the inlet of the pumped out medium supply channel. The LPU is made as a hollow stepped cylinder case in an upper portion of a cavity of which a packing element is installed, and a stepped piston (SP) spring loaded against the packing element and with abutment to a recess of the LPU is located lower in the cavity. Apertures, shut with the SP in its lower position, are made in a wall of the LPU opposite to upper bypass apertures of the BS. In the upper position of the SP and lower position of the BS the channel of pumped out medium supply, through apertures in the LPU, through upper bypass apertures in the BS and upper aperture in the JSP, is connected above the back valve to the inside cavity of the pipe column below the JSP. Simultaneously lower bypass apertures of the BS are coupled with the low aperture of the channel of the pumped out medium supply. There are coaxial axial channels in the SP and a packing element to enclose a flexible pipe containing a logging cable. A complex logging instrument is attached to the lower end of the flexible pipe; the said instrument with its cable head is connected to the logging cable. Two apertures in the wall of the flexible pipe above the logging instrument are made for connecting the cavity of the pipe column with the annular under packer space. As a result an increased reliability of operation is achieved as well as a higher efficiency of the installation at a boring of a payout bed.

EFFECT: increased reliability and efficiency of operation.

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