SU1339236A1 - Apparatus for developing and treating well - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to the oil and gas industry. The purpose of the invention is to increase the reliability of the device while simultaneously testing the packer. The device includes a housing 1 with an axial channel 9 and a saddle 4 for a waste ball valve 5. In the housing 1 under the saddle 4 a jet pump is installed, including a diffuser 6, a nozzle 7 and a mixing pump (L 00: о о jO

Description

chamber 8, it communicates with channel (K) 9. On the outer surface of the diff (uora 6, the bypass K 14 is complete). 14, which connects the over-piston cavity 15 with the mixing chamber 8. As the piston 12 moves in the cavity 15 up to the stop

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FIELD OF THE INVENTION The invention relates to the oil and gas industry, namely, devices for the development and treatment of a well.

The purpose of the invention is to improve the reliability of the device while it is possible to test the packer.

The drawing shows the proposed device.

The device includes a housing 1 and a pack 2 mounted on a column pump of compressor pipes 3. In the lower part of the housing 1, a saddle 4 is made under a recessed ball valve 5. The housing also has a jet pump including a diffuser 6 and a nozzle 7. Mixing chamber 8 of the jet pump is connected to the axial channel 9 of the housing 1. The outlet from the jet pump is connected to the annular space through the channel 10. The output of the pump is locked by a ball valve 11 and a piston 12 fixed from axial movements by a calibrated stopper 13 On the outer surface The shank of the diffuser 6 jet pump is made bypass channel 14, which communicates the piston cavity 15 with the mixing chamber 8

The device works as follows.

The housing 1 (without ball valve 5) in the arrangement with the packer 2 and with the jet pump is lowered into the well to a predetermined depth. The annular space is separated by the packer. Further, various methods are applied to influence the near-stem zone (acid treatment, hydraulic fracturing).

fluid from cavity 15 is displaced through K 14 into the cavity of pump-compressor pipes. Dump valve 5, which is installed in the saddle 4 and closes K 9. Then pump the working fluid through the pipes. It moves through the nozzle 7 and the diffuser 6 and draws liquid from the sub-pakier zone. At the termination of the pumping fluid valve 11 cuts off the annulus from the cavity of the pipe. 1 il.

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and etc.). During these operations, the working fluid is injected through the pump-compressor pipes 3 and the axial channel 9 into the sub-packer zone. The pressure of the injected fluid acts on the bottom of the ball valve 11 and on the top of the piston 12, but since the area of the bottom of the piston is larger than the cross-sectional area of the ball in the place of its seating in the saddle, the resultant force. The turn is directed downwards, and the outlet 10 of the jet pump is blocked.

Upon completion of these works, the outlet channel of the jet pump is opened, for which an overpressure is created in the annulus. In this case, the calibrated stopper 13 is cut off and the piston 12 moves up in the cavity 15 up to the stop. Fluid from cavity 15 is forced out through channel 14 into the cavity of pump-compressor pipes.

Then the ball valve 5 is dropped, which is installed in the seat 4 and closes the axial channel 9 of the device. Next, the working fluid is pumped through the tubing, which moves through the nozzle 7 and the diffuser 6, ensures that the fluid from the subpacker zone is drawn in. The ball valve 11 is pressed by the flow of fluid from the diffuser and provides communication with the annular space. At the termination of pumping the working fluid, the ball valve 11 cuts off the annulus from the cavity of the tubing.

In this position of the valve it is possible to work on additional

checking the tightness of the packer. For this, an overpressure is created in the annulus.

F o r mula inventions

A device for the development and treatment of a well, including a housing with an axial channel and a saddle for a dump valve, a packer mounted on the housing above the saddle jet pump, the mixing chamber of which communicates with the axial channel of the housing, and locking

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In order to ensure the reliability of the device while simultaneously testing the packer, an external bypass channel is made on the outer surface of the jet pump diffuser, which connects the cavity above the gate with the mixing chamber Q. ball check valve and piston installed in the bypass channel with the possibility of axial movement and blocking of the diffuser.

Claims (1)

Claim A device for developing and processing a well, comprising a housing with an axial channel and a seat for a throttle valve, a packer mounted on the housing above the saddle, a jet pump, a mixing chamber of which communicates with the axial channel of the housing, and a shut-off element, characterized in that, with In order to increase the reliability of the device while the packer can be tested, a bypass channel is made on the outer surface of the diffuser of the jet pump, connecting the cavity above the shut-off element to the mixing chamber (θ swarm, while the element is made in the form of a ball check valve and a piston installed in the bypass channel with the possibility of axial movement and overlap of the diffuser.