Abstract: A jet pump mounts on a pipe string in a well passing through coal beds. The pipe string length is greater than the lower coal bed occurrence depth. A carrying ring, with filtering shoe attached on a switcher, mounts below the lower bed floor. A carrying ring with bypass ports mounts on the string above the upper bed roof. A packer mounts on the string below the ports above the upper bed roof. A pump housing with a removable insert seat, having a nozzle and a mixing chamber with diffuser, mounts on the ring. The housing has a working fluid and exhausted fluid mixture draining channel and an exhausted fluid supplying channel, provided with a check valve. The housing connects to a working fluid supply pipe provided on the upper end with a sealing element disposed on the ring, and an inlet funnel receiving the removable insert.

Abstract: Well pump units for studying, repairing and developing of wells. The proposed well jet system comprises a logging instrument, a movable sealing unit, and a jet pump arranged in a flow string. The latter enables to create a series of different drawdown values in a well under-packer area, and thus to register parameters of the well and a medium pumped out of the well and to easily register a formation pressure restoration curve for the well under-packer area. When testing the formation, a pumping mode may be adjusted by changing pressure of an active working medium supplied to a jet pump nozzle. The provision of a channel for supplying the pumped out medium with a check valve helps avoiding a spontaneous flow of the working medium into the under-packer area. The system reveals increased operational reliability and productivity during the treatment of a productive formation and well testing.

Abstract: A jet pump body comprises nozzle and mixing chamber with diffuser, coaxially arranged, and a stepped through channel, tapers downward and provided with a seat between steps. The channel is made coaxially with a pipe string. Channels provided with return valve and restrictor for limiting locking member displacement of the return valve upward respective to the seat. A hollow stepped sealing unit with sealing element can be arranged in the through channel. An axial channel is made in the sealing element. A guiding separation bushing cantilever fitted by the top end thereof to the top part of the body of the pump mounts above the channel axially thereto in the pump body. Longitudinal slotted orifices are made in the separation bushing wall.

Abstract: For extracting oil from wells, pipe string, packer with axial through hole and support with axial channel with seat for jet pump mounting. Bypass channel with return valve is in support wall. Pump has cylindrical body with annular shoulder, for support seat mounting. Body has channel for supplying active medium to the pump nozzle, channels for supplying pumped out medium and removing media mixture and through channel with sealing unit. The channel couples to unit downstream channel. The unit has axial channel passing and displacing a logging cable/instrument. Mixing chamber with diffuser connected to the pipe string cavity upstream of pump positions axially to the nozzle. Channel diameter of support downstream of seat is equal to or greater than packer hole. The invention makes it possible to extend the device functionalities due to the possibility of disconnecting the in-tube space and casing annulus when the pump is stopped.

Abstract: Jet-pumping techniques for wells comprises mounting a logging tool, sealing member and jet pump on a flexible smooth tube. The pump contains nozzle and mixing chamber with diffuser with outlet connected to a tube cavity, nozzle inlet connected to space outside the tube. The tube is movable within a packer tubing string. Packer through channel diameter D1 is at least 12 mm smaller than the inside tubes diameter D2. A tube closing ball crane is provided between the pump and the member. The cylindrical body member is filled with elastic liners with bearing washers and top bearing pusher member. An insert with flange and mobile ring attaches below the body, a sleeve is provided between mobile ring and body . The flange diameter<diameter D1 of the packer through channel. The ring diameter D3>diameter D1. The ring lower surface is coated with elastic material.

Abstract: A well jet device for testing oil-gas wells comprises a body provided with bypass windows and an insert provided with a jet pump. The insert has channels and a mounting seat embodied therein, carrying a sealing unit with a channel for a cable and well instruments fixed thereto. An output channel communicates with an upstream cavity. A supporting sleeve, provided with bypass openings embodied in the wall of the sleeve and with a flange arranged in the lower part thereof, axially movable and spring-loaded with respect to the body, is arranged therein. A recess used for limiting the displacement of the sleeve flange and connected to the bypass windows is formed thereunder. In the lower position of the sleeve, channel for supplying active medium is linked with surrounding space through the bypass openings and windows, whereas in the top position thereof the windows are closed by the sleeve wall.

Abstract: A jet pump mounts on a pipe string in a well passing through coal beds. The pipe string length is greater than the lower coal bed occurrence depth. A carrying ring, with filtering shoe attached on a switcher, mounts below the lower bed floor. A carrying ring with bypass ports mounts on the string above the upper bed roof. A packer mounts on the string below the ports above the upper bed roof. A pump housing with a removable insert seat, having a nozzle and a mixing chamber with diffuser, mounts on the ring. The housing has a working fluid and exhausted fluid mixture draining channel and an exhausted fluid supplying channel, provided with a check valve. The housing connects to a working fluid supply pipe provided on the upper end with a sealing element disposed on the ring, and an inlet funnel receiving the removable insert.

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.

Abstract: A logging instrument, movably arranged sealing unit and jet pump mount on a flexible smooth pipe. Pump diffuser output connects to the annular space, the nozzle thereof connected to the pipe inner cavity. An in-channel return valve supplies pumped out medium. Circulation valves are arranged in the tubing string above the packer and carrier ring with an opening for mounting an element is disposed above said circulation valves. The element is in form of a body filled with elastic space plates set and thrust washers and thrust pressure element situated thereabove. Support socket with thrust flange made on lower end thereof and with movable thrust collar mounted thereon secures in a body lower part. A sealing ring is placed between the thrust collar and the lower part of a body. The invention increases operational reliability and productivity of the device during treatment of a productive formation and well testing.

Abstract: For extracting oil from wells, pipe string, packer with axial through hole and support with axial channel with seat for jet pump mounting. Bypass channel with return valve is in support wall. Pump has cylindrical body with annular shoulder, for support seat mounting. Body has channel for supplying active medium to the pump nozzle, channels for supplying pumped out medium and removing media mixture and through channel with sealing unit. The channel couples to unit downstream channel. The unit has axial channel passing and displacing a logging cable/instrument. Mixing chamber with diffuser connected to the pipe string cavity upstream of pump positions axially to the nozzle. Channel diameter of support downstream of seat is equal to or greater than packer hole. The invention makes it possible to extend the device functionalities due to the possibility of disconnecting the in-tube space and casing annulus when the pump is stopped.

Abstract: Well jet enables forming, via jet pump, range of different depressions in well tail area at specified differential pressure value. Logging instrument enables recording well and pumped out medium physical parameters. Well operating modes are adjusted by spring-loaded stepped piston positioned in seal unit body so as to open and close holes. Return valves in pumped out and active media supply channels, combined with stepped through channel, of diameter equal to or greater than diameter of the axial through hole of a packer and which is made in the pump body below a mounting seat, enable supplying chemical reagents along a pipe string to a production formation without additional units and prevent media pumped to the production formation, from annular above-packer space penetration. Said invention enables increasing reliability and performance by preventing active medium backflow and by maintaining the depression produced on the formation when the jet pump is stopped.

Abstract: A jet pump mounted on a pipe string and a packer, and a through channel with a sealing unit having a logging cable channel is in the pump body. A check valve is in a channel, for supplying a medium pumped out from a well, at the input thereof in the lower body. A guiding bush with a movable rod, arranged parallel to the logging cable, is fixed to the body under the valve. The top of the rod is positioned under the check valve closing element and a fork, over which the logging cable passes, fastens to the lower end of the rod. The closing element can be pressed out from a seat and brought into contact with the fork while a downhole instrument is lifted. The invention extends functionality by isolating pipe string spaces above and under the jet pump when the instrument is below the pump.

Abstract: A jet pump and packer. The pump body comprises nozzle and mixing chamber with diffuser, coaxially arranged therein, and a stepped through channel therein, tapers from the top downward and is provided with a seat between steps. The channel is made coaxially with a pipe string and coupled thereto. Channels for supplying pumped from the well and active media is provided with return valve and restrictor for limiting locking member displacement of the return valve upward respective to the seat thereof. A sealing unit being a hollow stepped body with sealing element can be arranged in the through channel. An axial channel for passing a rigid logging cable with well-logging instrument is made in the sealing element. A guiding separation bush cantilever fitted by the top end thereof to the top part of the body of the pump mounts above the channel axially thereto in the pump body. Longitudinal slotted orifices are made in the separation bush wall.

Abstract: The device comprises a body provided with bypass ports embodied therein and an insert with a jet pump and sealing elements. The insert comprises a pass channel, a channel for supplying an active medium to the pump nozzle, a channel which is used for supplying a pumped-out medium to the pump and which communicates with the pass channel and an output channel connected to an annular space. A mounting seat for a sealing unit is embodied in the pass channel above the channel for supplying the pumped-out medium. Said mounting seat is provided with an axial channel for passing a cable, which is used for moving instruments along the well bore, therethrough and through the pass channel. An axially movable spring-loaded steady bush provided with bypass holes in the wall thereof is arranged in the body. The insert provided with the pump is placed on the mounting seat embodied in the bush. An annular recess limiting the bush displacement is embodied in the body.

Abstract: The device comprises a jet pump mounted on a pipe string and a packer. The pump body is provided with a steplike pass channel which is embodied therein and communicates with a pumped-out medium supplying channel and an active medium supplying channel which is connected to an active nozzle at the output thereof and to an annular space. The pumped-out medium-supplying channel is connected to the pipe string downstream of the steplike channel via a return valve. A sealing unit in the form of a hollow steplike cylindrical body provided with a sealing element in the top part thereof is arranged in said steplike channel. A spring-loaded steplike piston supported by an annular projection is located downstream. Holes are embodied in the unit body in front of the holes on the pump body. The piston, in the lower position thereof, closes the unit body holes.

Abstract: Well jet device comprises a packer on a pipe string, with a central channel and a jet pump, comprising channels for supplying a working medium to a nozzle and supplying a medium pumped from the well. A diffuser output connects to the annular space and the nozzle connects to the pipe string internal cavity on the side of the input thereof through the channels. The body has a movable steady bush, spring-loaded working medium flow switch. Steady bush bypass holes and mounting seat for mounting a sealing unit provided with a hole for passing a logging cable or for arranging a depression insert provided with autonomous instruments and a return valve are provided. The sleeve, in the top position, closes the channels and, in lower position, the top end face is positioned under the input into the channel. The bypass holes are connected to the input into the channel.

Abstract: A jet pump mounted on a pipe string and a packer, and a through channel with a sealing unit having a logging cable channel is in the pump body. A check valve is in a channel, for supplying a medium pumped out from a well, at the input thereof in the lower body. A guiding bush with a movable rod, arranged parallel to the logging cable, is fixed to the body under the valve. The top of the rod is positioned under the check valve closing element and a fork, over which the logging cable passes, fastens to the lower end of the rod. The closing element can be pressed out from a seat and brought into contact with the fork while a downhole instrument is lifted. The invention extends functionality by isolating pipe string spaces above and under the jet pump when the instrument is below the pump.

Abstract: Well jet device comprises a packer mounted on a pipe string provided with a central channel embodied therein and jet pump. The pump has channels supplying a working medium to a nozzle, removing the media mixture and supplying a medium pumped from the well, respectively. Said nozzle is connected to the annular space by the channels and the channel is connected to the pipe string internal cavity through the channel on the side, where the diffuser of the pump enters and exits. A working medium flow switch is arranged in the body. An annular channel communicating with the channel via the channel and the nozzle is above said abutment flange and the steady bush comprises bypass holes and mounting seat for mounting a sealing unit with a hole for passing a logging cable with instruments therethrough or for arranging a depression insert provided with a return valve.

Abstract: A well jet device operating method comprises running a jet pump into a well, releasing a packer above a productive formation, pumping hydraulic fracturing fluid though a blocking insert in the pump channel, extracting the blocking insert, running flexible pipe into the well through a sealing unit and arranging the lower end thereof at lower formation perforation interval level. The formation is drained, fluid for washing a bottomhole is supplied by the flexible pipe, maintaining the ratio between pipe pressure value and a casing annulus working medium pressure within a range greater than or equal to 0.98. When at least two volumes of hydraulic fracturing fluid is extracted, the pipe fluid supply is stopped. At least 5 minutes after, off the working medium supply to the pump nozzle is shut off, in examining the formation for evaluating the productivity thereof and in bringing the well into operation.

Abstract: A well jet device for testing oil-gas wells comprises a body provided with bypass windows and an insert provided with a jet pump. The insert has channels and a mounting seat embodied therein, carrying a sealing unit with a channel for a cable and well instruments fixed thereto. An output channel communicates with an upstream cavity. A supporting sleeve, provided with bypass openings embodied in the wall of the sleeve and with a flange arranged in the lower part thereof, axially movable and spring-loaded with respect to the body, is arranged therein. A recess used for limiting the displacement of the sleeve flange and connected to the bypass windows is formed thereunder. In the lower position of the sleeve, channel for supplying active medium is linked with surrounding space through the bypass openings and windows, whereas in the top position thereof the windows are closed by the sleeve wall.