Boring or penetrating the earth – Miscellaneous
Reexamination Certificate
2005-12-06
2005-12-06
Tsay, Frank S. (Department: 3672)
Boring or penetrating the earth
Miscellaneous
C175S067000
Reexamination Certificate
active
06971460
ABSTRACT:
The invention relates to pumping engineering, mainly to downhole jet production units. The inventive downhole jet unit comprises a packer, a pipe column and a jet pump. An active nozzle is embodied in the body of the jet pump, and a pass channel provided with a mounting face for a sealing assembly with an axial channel is embodied therein. Said unit is also provided with an irradiator and a receiver transformer of physical fields which are mounted on a cable. The output of the jet pump is connected to a space around the pipe column. The input of a channel for feeding the pumped out medium of the jet pump is connected to the internal space of the pipe column below the sealing assembly. The input of a channel supplying a working medium to the active nozzle is connected to the internal space of the pipe column above the sealing assembly. The invention makes it possible to optimise dimensions of various elements of the unit, thereby increasing the operating reliability of the downhole jet unit.
REFERENCES:
patent: 4293283 (1981-10-01), Roeder
patent: 4744730 (1988-05-01), Roeder
patent: 6460936 (2002-10-01), Abramov et al.
patent: 2059891 (1996-10-01), None
patent: 2121610 (1998-10-01), None
patent: 1668646 (1991-07-01), None
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