RU2394148C1 - Device of hydro-acoustic generator - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: device corresponds to case in form of cylinder transforming into bottom. The latter has a circular groove, an aperture for a clamp bolt, plugs, and threads for connecting plugs to the case. Also a movable pressure pipe is installed in centre of the plug; a diaphragm dividing the cavity of the case into upper and lower volume is attached to the end of the pipe. A bump stop in form of a conic disk is arranged under the pressure pipe; the stop is secured to the case with the clamp bolt. Volume between the diaphragm and the bump stop corresponds to a chamber of "build-up" pressure of working medium. A gap between the bump stop and the case corresponds to a circular nozzle opening into the circular chamber, volume of which is connected with the circular chamber by means of pipes, also the chamber is closed with the conic disk resting on a spacer bushing. The gap between the case and conic disk forms the circular nozzle opening into the circular chamber created with the conic disk, the case and the spacer bushing. The gap between the conic disk and the case also corresponds to the circular nozzle opening into the circular chamber formed with the plug, wherein there are made nozzles directing discharge of working medium into a borehole.

EFFECT: efficient propulsion of plugs into bottomhole cavity and high reliability of device operation.

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Description

FIELD OF THE INVENTION

The invention relates to the oil and gas industry, in particular to devices for a hydroacoustic generator, and can be used to restore the flow rate of the produced product by eliminating the natural "blockage" of the channels in the rocks.

State of the art

A well-known hydrodynamic oscillation generator, comprising a hollow body, an upper clamping sleeve rigidly connected to it and an element concentrically mounted in the housing under the upper clamping sleeve, creating an oscillatory movement, forming an annular channel with the housing, is provided with a lower clamping sleeve, and the element creating oscillatory movement, made in the form of alternating nozzles with permeable and impermeable walls alternating in height, with the lower clamping sleeve rigidly connected to the housing, mounted under the nozzle E and is provided with peripheral axial channels communicating the annular passage between the housing and the nozzles to the cavity of the housing (see. US Pat. RU №2023147, cl. E21B 43/25, publ. 15.11.1994 g).

The disadvantage of this generator is the complexity of its manufacture and low efficiency due to significant energy losses.

A device is known for a multistage jet hydroacoustic generator containing a body in the form of two cylindrical (upper and lower) halves, at the opposite ends of which are threads of the joint, while the upper and lower parts of the body are closed with upper and lower plugs, respectively (see "Testing of oil and gas exploration wells in the column ", Authors: Semenov Yu.V., Voitenko BC et al., P. 220-225, Moscow, Nedra, 1983).

The disadvantages of this generator are: the presence of rotating quickly wearing parts, high working pressure, unproductive used to drive rotating parts, the short length of the restored channels in the rocks.

The closest in technical essence and the achieved positive effect and adopted by the author for the prototype is the device of a multi-stage jet hydroacoustic generator containing a body in the form of two cylindrical (upper and lower) halves, at the opposite ends of which there are connection threads, while the upper and lower parts of the housing are closed respectively, upper and lower plugs, while the device is equipped with conical disks with spacer tubes, a chipper, radial outlet inserts with nozzles with a replaceable washer, while conical disks are fixed to the upper plug with a tightening bolt, with spacer tubes forming annular chambers between the casing wall and conical disks, the gaps between conical disks and the casing are annular nozzles, and conical under the lower conical disk in the casing a chamber passing into the nozzle with a bell; in this case, a bump is installed on the plug of the lower part of the body, forming a resonance chamber with the body above the bump, and an annular compensation measure an annular nozzle, and in the lower half of the housing insert mounted radial exhaust nozzle to change the direction of the effluent stream and a replaceable washer - plug part nozzles (see. US Pat. RU No. 2323266, cl. E21B 28/00, E21B 43/16, publ. April 20, 2008).

The disadvantage of this device is that, converting the working fluid into a foam mass and discharging into the face, the device thereby sharply isolates the passage of waves and reduces its effect on the clogged rock channels, and by creating increased pressure in the face, the release of the working fluid into the face prevents exit "Blockage" in the face.

Disclosure of invention

The objective of the invention is to develop a reliable device for a hydro-acoustic generator, with the help of which the generated sound waves, through a dense body located in the bottom, act on the “blockage” of channels in rocks, translating these “blockages” into a more plastic fluid state, which contributes to leakage, by oscillation “Blockage” in the face, and the ejection of a dense body located in the face through ejection creates a certain “depression” in the face, which will contribute to more intensive promotion uw "blockages" in the face cavity.

The technical result that can be obtained using the proposed invention is to intensify the promotion of "blockages" in the cavity of the face and high reliability of the device.

The technical result is achieved using the device of a hydroacoustic generator containing a cylinder-shaped body made in the bottom, the latter has an annular groove, a hole in the center for the coupling bolt and a threaded connection thread, a chipper, tapered discs, spacers, ring chambers, and there are gaps between casing and conical disks form annular nozzles, while it is equipped with a pressure pipe movably mounted in the center of the plug, and a diaphragm is fixed at the end of the pressure pipe, dividing the internal cavity of the body into two volumes: the lower with a chipper, which is fixed with a coupling bolt to the body, and the upper with conical disks, spacer sleeves, locked with a plug, in which nozzles are made that direct the discharge of the working fluid into the wellbore, and the volumes of the internal cavity of the body are connected by pipes installed in the chipper and diaphragm for the passage of the working fluid from the lower annular chamber located under the chipper into the annular chamber located above the diaphragm.

Brief Description of the Drawings

The drawing shows the device sonar generator, General view.

The implementation of the invention

The device of the hydroacoustic generator consists of a housing 1 in the form of a cylinder made in the bottom (not indicated), the latter has an annular groove (not indicated), a hole in the center (not indicated) for the coupling bolt 2, plug 3, thread 4 for connecting the plug 3 to casing 1, while in the center of the plug 3 a pressure pipe 5 is movably mounted, at the end of which a diaphragm 6 is fixed, dividing the internal cavity of the housing 1 into two volumes, lower and upper, a baffle 7 is installed under the pressure pipe 5 in the form of a conical disk It is connected to the housing 1 by a tightening bolt 2, and the volume between the diaphragm 6 and the chipper 7 is the chamber 8 of the "buildup" of the working fluid pressure, the gap between the chipper 7 and the housing 1 is an annular nozzle 9, which opens into the annular chamber 10, the volume of which is connected by pipes 11 with an annular chamber 12 closed by a conical disk 13 supported by a spacer sleeve 14, and the gap between the housing 1 and the conical disk 13 forms an annular nozzle 15 opening into the annular chamber 16 formed by the conical disk 17, the housing 1 and the spacer sleeve 18, and the gap between conical the disk 17 and the housing 1 is also an annular nozzle 19, opening into an annular chamber 20 formed by a plug 3, and in the plug 3 there are nozzles 21 directing the discharge of the working fluid into the wellbore (not shown).

The device sonar generator operates as follows.

The device using the pressure pipe 5 is connected to the pressure pipe (not shown) and lowered into the bottom of the well (not shown) by the conical part of the plug 3, and set under the edge of the casing (not shown) of the well. A working fluid (water, oil) is pumped into the device through the pressure-compressor pipe — liquid that flows from the pressure pipe 5 into the chamber 8, which is accompanied by a decrease in the pressure of the working fluid at the spout from the pressure pipe 5, and the impact of the working fluid on the chipper 7 and spraying fan in the volume of the chamber 8 creates the effect of "constipation" and an increase in pressure in the chamber 8, at which the fan breaks and the working fluid under pressure through the annular nozzle 9 rushes into the annular chamber 10, as a result of which the pressure in the chamber 8 decreases and the cycle repeats. The working fluid, flowing from the annular nozzle 9 into the annular chamber 10, after tearing off the nozzle 9, enters the expanded volume of the annular chamber 10 and “boils” with an instant pressure release, forming the effect of cavitation - the generation and explosion of gas bubbles in the working fluid. The cavitation phenomenon is proportional to the pressure increase in the chamber 8, and therefore, the velocity of the working fluid through the nozzle 9, however, there comes a time when the explosions of the bubbles create a counter-pressure pulse, which “locks” the nozzle 9, and the pulsating pressure ejects the working fluid from the annular chamber 10 through the pipes 11 into the annular chamber 12, where the process is repeated.

The amplification of hydroacoustic vibrations occurs when the working fluid flows from the annular chamber 16 through the annular nozzle 19 into the annular chamber 20. By increasing the oscillating power during each stage, the device of the hydroacoustic generator acts on clogging of rock channels and translates these “clogs” into a more plastic one by resonance of vibrations. condition, thereby contributing to their leakage into the face. And the working fluid through the nozzles 21, made in the plug 3, expires in the form of a gas-liquid emulsion into the well, ejecting the mass located in the bottom.

The discharge of bottomhole mass creates a certain rarefaction in the bottom, which contributes to the promotion of blockages along the rock channels to the bottom and the opening of these channels to promote the extracted product.

The invention in comparison with the prototype and other known technological solutions has the following advantages:

- increase the zone of impact on rocks of generated oscillations by maintaining in the face of a dense mass that conducts well the generated oscillations;

- creation in the bottomhole of the rarefaction effect by removing masses in the bottom by ejection into the well, which contributes to the leakage of “blockages” into the bottom hole;

- simplification of the design;

- improving the reliability of the device.

Claims (1)

The device of the hydroacoustic generator containing a cylinder-shaped housing made in the bottom, the latter has an annular groove, a hole in the center for the coupling bolt and plug connection threads, a chipper, conical disks, spacer sleeves, annular chambers, while there are gaps between the body and conical disks they form annular nozzles, characterized in that it is provided with a pressure pipe movably mounted in the center of the plug, and at the end of the pressure pipe a diaphragm is fixed, dividing the internal cavity of the housing by volume: lower with a chipper, which is fixed with a coupling bolt to the body, and the upper with conical disks, spacer sleeves, locked with a plug, in which nozzles are made that direct the discharge of the working fluid into the wellbore, and the volumes of the internal cavity of the body are connected by pipes installed in the chipper and a diaphragm for the passage of the working fluid from the lower annular chamber located under the bump into the annular chamber located above the diaphragm.

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