Device for influencing the bottomhole formation zone of the well and clean it

 

The invention is intended for processing and cleaning the bottom of the wells and can be used in the construction and operation of wells. The device includes sequentially installed and connected by a pipe shank, check valve, implosion device in the form of a cylinder with a hollow plunger having openings in the side walls, and tubing (tubing) connected to the hollow plunger and in communication with its cavity. The device is equipped with a hydraulic decommutation spool type, installed between the check valve and implosion device, and the hollow plunger is made with a check valve intended for messages cavity of the plunger with the spring cavity when the fluid flow in the tubing. The technical result is to increase the productivity, increase the permeability zone, the improvement of the quality of filtration of a fluid at a considerable distance from the perforated interval. 4 C.p. f-crystals, 3 ill.

The invention relates to the oil and gas industry, in particular to methods of processing, cleaning, bottom-hole zone of the well, and can be used in the construction and operation of oil, discharge, vodsub the containing successively installed and connected by a pipe shank, check valve, implosion device in the form of a cylinder with a hollow plunger having openings in the side walls, and tubing (tubing) connected to the hollow plunger and in communication with its cavity (see EN 2160825 C1, 10.12.2000, E 21 In 37/00).

A disadvantage of the known device is the lack of filtration of fluid at a considerable distance from the perforated interval, in addition, it does not provide comprehensive works on one descent suspension tubing.

The technical result is to increase the productivity, increase the permeability zone, the improvement of the quality of filtration of a fluid at a considerable distance from the perforated interval, providing comprehensive works on one descent suspension tubing.

The technical result is achieved in that the device for influencing the bottomhole formation zone of the well and clean it contains successively installed and connected by a pipe shank, check valve, implosion device in the form of a cylinder with a hollow plunger having openings in the side walls, and tubing (tubing) connected to the hollow plunger and communicated with his bands and implosion device, and the hollow plunger is made with a check valve intended for messages cavity of the plunger with podprumerny cavity when the fluid flow in the tubing. The device may be equipped with a jet pump mounted on the tubing so that its inlet is blocked through a tube that is installed in the tubing, and the output nozzle communicated with the space well, and end-to-end tube is installed with the possibility of its removal and installation in the casing of the hollow tube between the inlet hole jet pump and a check valve between the jet pump and plunger. The device may also be provided with a packer set between hydraulic decommutation and implosion device. Hydraulic decommutator can be performed with Bolotnikova device comprising a cylinder with holes in the stator and rotating the spool in the form of a rotor with tangential slots. The shank is made with slits in the side walls and muted the butt-forming chamber in which is placed deep pressure gauge.

In Fig. 1 shows a device for influencing the bottomhole formation zone of the well and clean it. In Fig.2 device producing deeper machining using Himicheskaya installed and connected by a pipe shank 1, the check valve 2, implosion device in the form of a cylinder 3 with a hollow plunger 4 having openings 5 in the side walls, and tubing (tubing) 6. The device is equipped with a hydraulic decommutation 7 spool type, installed between the check valve 2 and implosion device, and the hollow plunger 4 is made with a check valve 8, intended for messages cavity of the plunger 4 with podprumerny cavity when the fluid flow in the tubing 6. The device is equipped with a jet pump 9 mounted on the tubing 6 in such a way that its inlet 10 is overlapped with the through tube 11 that is installed in the tubing, and the output nozzle 12 is in communication with the space well. End-to-end tube 11 is installed with the possibility of its removal and installation in the casing 6 of the hollow tube 22. The device has a packer 1 3 installed between decommutation 7 and implosion device. Hydraulic decommutator 7 made with Bolotnikova device comprising a cylinder 14 with the holes in the stator and the rotary slide valve 15 in the form of a rotor with tangential slots. The shank 1 is made with slots 16 in the side walls and muted face 17 having a chamber 18 in which is placed deep pressure gauge 19.

The device operates as about to slaughter and hydraulic decommutator 7 was at the level of the bottom of the perforated interval. The shank 1 is composed of oil well tubing, the lower part muffled face 17, inside a special chamber 18, which is set deep electronic manometer 19, locking the whole process of exposure and cleaning of the reservoir. Filter shank 1 is an inlet of the tubing with a length of 1.5 m from the slits 16. Above is a reverse ball valve 2, through which you can wash out the hole before planting the packer 13 backwashing the annulus through the shank 1, the spool 15 in the casing and to prevent reverse flow of fluid. When pumping the working fluid in the tubing to wave action through hydraulic decommutator 7 check valve 2 is closed, the resulting pressure is effectively used to influence the PA layer. Over decommutation 7 is installed mechanical packer 13, designed to isolate the test interval from the rest of the wellbore. Above the packer 13 is mounted implosion device that consists of a cylinder 3, a hollow plunger 4 with radial holes 5 and special by-pass valve 8. In implosion device radial holes 5 of the rolling piston 4 are closed.

Over implosion device is installed article is CCW working fluid through it, through implosion device to decommutator 7. Above the jet pump 9 are tubing 6 with tight connections. They serve depression of the camera when mechanical cleaning implosion device.

The device allows you to process bottom-hole zone of the well by pumping fluid wash unit through tubing 6, the jet pump 9, implosion device and through its special valve 8 to hydraulic decommutator 7. Hydraulic decommutator 7 creates oscillations by periodic shut off the flow of the working fluid flowing through the valve 15. When pumping the working fluid in the tubing, rotating the spool, periodically block the flow of the working fluid in the form of hydraulic shock. They are accompanied by a sharp pressure rise of the fluid outflow from the hole. In addition, periodic leakage of liquid through the slits of the valve 15 creates a cyclical fluctuations. Thus clears the perforation interval of the formation. Processing is performed pointervalue from the bottom up with the release of circulation on struby.

After the interval stimulation in the presence of pickup for effective cleaning of PZP well productivity is).

For effective cleaning of the perforated interval after exposure to hydraulic decommutation 1 and injection of chemical reagents necessary to perform mechanical cleaning with creating a depression on the layer to remove the reaction products chemicals, solids and clay compositions. Without the use of a comprehensive line-up when carrying out such work was required to lift and lower implosion installation, increased working time (from 30 to 40 hours). Suspended solids and the reaction products during this time precipitated and back collaterali layer. The proposed design (Fig.1) allows after stimulation quickly without tripping over 2-3 hours to produce mechanical cleaning of the reservoir from the bottom.

Process mechanical cleaning of the reservoir and the bottom (Fig.2) as follows. It is necessary to make swabbing swab 20 for emptying the tubing 6 to the jet pump 9. Reducing the level of fluid in the tubing 6 swab 20 is made up to a certain depth with the necessary depressions on the formation. For cleaning of the reservoir implosion device is smooth unloading section at the bottom, this opens up Automechanika impurities, through the shank 1, the check valve 2 enters the emptied chamber of tubing, carrying the reaction products of the chemical formation treatment, mud, slime.

Depression on the formation of implosion device, if necessary, continuously adjustable output plunger 4, which has radial holes 5, the number of which increases gradually.

After mechanical cleaning of the reservoir and the bottom is the reverse flushing flushing unit (Struble in tubing) to clean the tube space from dirt and products decolletee. A distinctive feature of the device still is that after stimulation, mechanical cleaning, rinsing, is a call flow jet pump 9 (Fig. 3), from which is extracted through tube 11 mobile hoist, drop ball 21 and installed the same winch deaf tube 22, is planting packer 13 with the sealing of the annular space. The development of the jet pump 9 is creating alternating depressions circulation through the tubing in satrup to obtain a stable inflow of reservoir fluid. The pressure change in the process of development and stimulation followed for cleaning and PZP well with the aim of improving its productivity can increase the oil production rate, water reservoirs with different reservoir properties, substantially increase the injectivity of injection wells.

Depending on the nature of the formation method of processing, cleaning, bottom-hole formation zone of the wellbore using an integrated device can be used in other embodiments. One of the options using an integrated device layout is: shank-filter, check valve, hydraulic decommutator, packer, implosion device with a special valve. For stimulation in this case, the method of swabbing. With this scheme, you can perform all operations on the effects on the reservoir, including reverse, direct flushing of the borehole bottom.

The device (Fig.1) allows vibrotactile, pointervalue across the layer thickness, resulting in the stimulation hydrodynamic shock waves generated by decommutation, is crushing and separation from the skeleton rocks clogging particles, under the action of the cyclic depressions created by the jet pump, is the removal of suspended particles from the bottom of the reservoir.

The device (Fig.2) allows you to make a more precise machining and cleaning with the use which allows you to wash the bottom of a well working fluid and transfer the oil to reduce bottomhole pressure and determine the flow of the well.

The device (Fig.3) allows you to call and determination of inflow creating alternating depressions using a jet pump.

One descent-ascent suspension is complex exposure and cleaning of the reservoir decommutation and additional cleaning of the reservoir and the bottom of implosion device with the creation of multiple alternating depression (depression - repression), development and call flow jet pump with a record of pressure changes of the electronic pressure gauge. Is the gain in time and improve the quality of processing brisebois zone of the reservoir. Eliminates up to 5 tripping operations.

Complex layout allows you to change the sequence of operations depending on the status of the bottomhole zone.

Claims

1. Device for influencing the bottomhole formation zone of the well and its treatment, including successively installed and connected by a pipe shank, check valve, implosion device in the form of a cylinder with a hollow plunger having openings in the side walls, and tubing (tubing) connected to the hollow plunger and in communication with its cavity, characterized in that it is provided with a Hydra is the your, and the hollow plunger is made with a check valve intended for messages cavity of the plunger with podprumerny cavity when the fluid flow in the tubing.

2. The device under item 1, characterized in that it is provided with a jet pump mounted on the tubing so that its inlet is blocked through a tube that is installed in the tubing, and the output nozzle communicated with the space well, and end-to-end tube is installed with the possibility of its removal and installation in the casing of the hollow tube between the inlet hole jet pump and a check valve between the jet pump and plunger.

3. The device under item 1 or 2, characterized in that it is provided with a packer set between hydraulic decommutation and imitazioni device.

4. Device according to any one of paragraphs.1-3, characterized in that the hydraulic decommutator made with Bolotnikova device comprising a cylinder with holes in the stator and rotating the spool in the form of a rotor tangential slits.

5. Device according to any one of paragraphs.1-4, characterized in that the shank is made with slits in the side walls and muted the butt-forming chamber in which is placed deep pressure gauge.

 

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FIELD: oil extractive industry.

SUBSTANCE: device has pit-face cutting valve and mounting tool. Cutting valve has body, packer with check valve and perforated tail. Mounting tool has hollow rod, connected by shear elements to expanding cone of packer, lower and upper bodies. Lower body is provided with self-compacting collar, and upper - through tubing string of limited volume and sleeve is connected to drop valve cylinder. Valve rod is connected to rope, on which device is lowered into well. Hollow rod and tubing string form depression chamber being at constant atmospheric pressure. Rod has upper and lower shelves. On shelf of upper body expander of self-compacting collar having longitudinal grooves is mounted. After raising of mounting tool from well packer, body with tail and check valve remain in it. Then a pump is lowered into well.

EFFECT: lower costs.

3 dwg

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