Patent application number | Description | Published |
20080245572 | Well Jet Device and the Operating Method Thereof - 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. | 10-09-2008 |
20080264634 | Well Jet Device and the Operating Method Thereof - 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. | 10-30-2008 |
20080314595 | Well Jet Device and the Operating Method Thereof - 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. The output channel is connected to a body surrounding space when the bush is in the lower position thereof and the bypass ports are closed by the steady bush wall when the bush is in the top position. Said invention makes it possible to reduce a time for a well examination and development. | 12-25-2008 |
20090016900 | WELL JET DEVICE AND THE OPERATING METHOD THEREOF - 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. | 01-15-2009 |
20100032152 | WELL JET DEVICE - 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. | 02-11-2010 |
20100147513 | WELL JET DEVICE FOR WELL-LOGGING OPERATIONS AND THE OPERATING METHOD THEREOF - 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. When the piston is in the top position, the channel for supplying a medium pumped-out from the well through the holes of the unit and pump bodies is connected to the pipe string downstream of the pump body. The piston and sealing element are provided with coaxial channels which are embodied therein and used for passing a cable with a logging instrument suspended below the pump body. | 06-17-2010 |
20100243256 | BORE-HOLE JET DEVICE FOR FORMATION HYDRAULIC FRACTURING AND HORIZONTAL WELL EXAMINATION AND A METHOD FOR THE OPERATION THEREOF - 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. The invention makes it possible to improve the reliability of the device and to optimise the sequence of operations during the well test. | 09-30-2010 |
20100326661 | WELL JET DEVICE AND THE OPERATION METHOD THEREOF - 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. | 12-30-2010 |
20110000661 | WELL JET DEVICE - 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. | 01-06-2011 |
20110073301 | WELL JET DEVICE FOR LOGGING AND DEVELOPING HORIZONTAL WELLS WITH ABNORMALLY LOW FORMATION PRESSURE - 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. | 03-31-2011 |
20110272047 | WELL JET PUMPING ASSEMBLY FOR DEGASSING COAL BEDS - 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. | 11-10-2011 |