Well jet device for well-logging operations and the...

Details Well jet device for well-logging operations and the... Well jet device for well-logging operations and the...

2011-04-19

2011-04-19

Gay, Jennifer H (Department: 3672)

Wells

Processes

With indicating, testing, measuring or locating

C166S250010, C073S152120, C073S152170, C073S152260

Reexamination Certificate

active

07926563

ABSTRACT:
A jet pump on pipe string and packer, pump body being provided with steplike pass channel embodied therein and communicates with pumped-out medium supplying channel and active medium supplying channel, connected to active nozzle at the output and to annular space. The pumped-out medium-supplying channel connects to the pipe string downstream of steplike channel via return valve. A hollow steplike cylindrical body sealing unit provided with a top part sealing element arranges in said steplike channel. An annular projection supported spring-loaded steplike piston is downstream. The piston lower position closes unit body holes. When the piston is in top position, the channel for supplying medium pumped-out from the well through the unit holes and pump bodies connects to the pipe string downstream of the pump body. The piston and sealing element include coaxial channels therein, used for passing a cable with logging instrument suspended below the pump body.

REFERENCES:
patent: 4718486 (1988-01-01), Black
patent: 4988389 (1991-01-01), Adamache et al.
patent: 5099919 (1992-03-01), Schneider et al.
patent: 2004/0071557 (2004-04-01), Khomynets
patent: 2008/0115934 (2008-05-01), Pettinato et al.
patent: 2008/0264634 (2008-10-01), Khomynets
patent: 2059891 (1996-05-01), None
patent: 2106540 (1998-03-01), None
patent: 2160634 (2000-12-01), None

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