UA26213U - Electro-hydraulic well unit - Google Patents

Abstract

The utility model relates to oil producing industry and can be used at oil extraction from deep wells.

Description

Description of the invention

A useful model is related to the oil industry and can be used in the production of oil 2 from deep wells.

The closest in terms of technical essence and the largest number of essential features to the technical solution, which is taken as a prototype, is a device for cleaning the bottom-hole zone of the well, (described in A.S. USSR Mo954562

E21843/00, underground, in B.V. Mo32 dated 30.08.1982.1.

The known prototype contains a current pulse generator placed in a hermetic casing and a system of electrodes connected to it electrically 70, which is located in a chamber with an annular elastic shell. At the same time, the electrode system of the discharger is placed in a chamber with an annular elastic shell, filled with a dielectric liquid and located in a hermetic casing together with the generator.

However, this arrangement of the electrodes of the discharger in the prototype allows during its operation to create a pressure pulse to the closed shell at the second stage of the electro-hydraulic discharge (thermal stage). The pressure pulse created in this 719 way is transmitted through the walls of the chamber into the environment, cleaning the perforation holes in the pipes in the collector area of the well. The low-frequency spectrum of the pressure pulse and low intensity do not allow such a device to increase the flow of oil in the collector zone at depths of more than 3000 Ohm, since the action of such a pulse is insufficient to open and create microcracks on the walls of the collector frame, and at the same time increase the flow of oil.

Thus, the known device is not very effective when working in deep wells and it is impractical to use it at these depths.

The task of this technical solution is to create an electro-hydraulic well device, in which the new connection of the generator of high-voltage voltage pulses, placed on the power cable in the well and electrically connected through the forming cable line with the system of electrodes of the arrester, and in the opening of the forming cable line, a series of sharpened high-voltage voltage pulses, and the system of electrodes of the discharger is placed on the open surface of the frame of the surface layer of the collector. This makes it possible to increase the efficiency of the proposed useful model by shortening the front and forming a powerful shock pulse at the first - electrical stage of the discharge in the collector zone.

The essence of the useful model is that the electro-hydraulic well device, which contains a generator and a system of discharge electrodes electrically connected to it, according to the useful model, has a generator of high-voltage voltage pulses, placed on the power cable in the well and electrically connected connected through the forming cable line with the system of electrodes of the arrester, and in the opening of the forming cable line, the sharpener of high-voltage voltage pulses is connected in series, and the system of electrodes of the discharger (He) is placed on the open surface of the frame of the surface layer of the collector. 3o This allows us to draw a conclusion regarding the conformity of a useful model with the "novelty" criterion. high school

The task is solved as follows. In a known device (prototype), which contains a generator and a system of discharge electrodes electrically connected to it, and a system of discharge electrodes, which is placed in a chamber with an annular elastic shell, filled with a dielectric liquid and located "4, in a sealed cylindrical body together with the generator, according to the useful model, the generator of high-voltage C 50 voltage pulses is placed on the power cable in the well and is electrically connected through the forming cable line with the system of electrodes of the arrester, and in the opening of the forming cable line, the sharpener of high-voltage voltage pulses is connected in series with, and the electrode system the arrester is placed on the open surface of the frame of the surface layer of the collector. The operation of the known device, due to the low rate of growth of the voltage pulse amplitude, allows the release of the maximum amount of energy at the second stage of the electro-hydraulic discharge (thermal stage of the discharge), in which the discharge has a low-frequency character, and the intensity of strength of the vapor-gaseous region of the discharge is small for crushing the surface layer

Ge") rocks of the open surface of the collector frame.

But in the known invention (A.S. USSR Mo954562 E21843/00, subsurface, in B.V. Mo32 dated 30.08.1982| this arrangement of the electrode system of the arrester does not allow to receive an electrohydraulic discharge with the release of - 20 maximum energy at the first stage - electrical breakdown of the liquid gap because the electrodes of the discharger are placed inside the device, that is, the known device does not work efficiently when extracting oil in deep c" wells at reservoir pressure.

A comparative analysis of the proposed utility model with the prototype shows that the proposed electrohydraulic well device differs from the known one in that the generator of high-voltage pulses 29 voltages is placed on the power cable in the well and is electrically connected through the forming cable line c to the electrode system of the arrester, and in the opening the forming cable line is connected in series with a sharpener of high-voltage voltage pulses, and the electrode system of the discharger is placed on the open surface of the frame of the surface layer of the collector.

Electrical connection of the generator of high-voltage voltage pulses through the forming cable 60 line, in the opening of which the sharpener of high-voltage voltage pulses is connected in series, and the system of electrodes of the discharger placed on the open surface of the surface layer of the collector allows to create an electro-hydraulic discharge with the release of maximum energy at the first stage - electric discharge of the liquid gap and increase the efficiency of the device.

Thus, everything described above distinguishes the proposed electrohydraulic well device from known technical solutions and shows that the proposed technical solution has significant features.

The electro-hydraulic well device is explained by the drawing (see Fig. 1).

In well 1, a generator of high-voltage pulses of voltage Z is placed on power cable 2, which has three blocks: a block of high-voltage rectifier 4, a block of capacitors 5, a block of switches 6. The generator of high-voltage pulses of voltage Z is electrically connected to the forming cable line 7, 8. In the opening of the forming cable line 7, 8, the intensifier of high-voltage voltage pulses 9 is connected in series, which forms the front of the high-voltage pulse, which is fed through the forming cable line 8 to the electrodes 10, 11 of the discharger, which are located in the zone of the surface layer 12 of the collector 13 of the well.

An electro-hydraulic downhole device works as follows. From the energy source, which is located on the 7/o surface of the earth near the well 1, electrical energy flows to the high-voltage rectifier unit 4 and charges the capacitor unit 5. When a start pulse is supplied from the surface of the earth, the switch b is triggered and the capacitor unit 5 is discharged to the forming cable line 7, 8, which serves to form and sharpen the front of a high-voltage voltage pulse. The high-voltage voltage pulse through the high-voltage voltage pulse intensifier 9 and the forming cable line 8 enters the electrodes of the arresters 10, 11. Under 7/5 Under the influence of the high-voltage voltage pulse with a steep front, a pulsed electric discharge occurs, which successively penetrates the layers of oil and the underlying layer of hard rock, impregnated oil During the nanosecond front, the amplitude of the voltage pulse is distributed across the capacitances of the layers. Since the upper layer of oil has a dielectric constant of -2.Z, and the lower one - 74.5, it is MAMI", where M is the amplitude of the voltage pulse, V;

M, Mo - part of the pulse amplitude applied to the first and second layers of the collector. s s y - M --; cha --- s, Sa de Su, So - the capacity of the I and II layers of the collector. shcha, that is, the shorter the front, the more uneven the voltage distribution in the two-layer ss - sh-71t-sa medium. As it is, the first layer of oil will break through first. The discharge in this gap, in turn, additionally sharpens the pulse front and contributes to the breakdown of the second, solid layer, causing it to crack and reveal microcracks that appear on the surface of the collector frame due to the concentration of Ge) energy of the discharge in a small area of the collector. -

The use of the proposed electro-hydraulic well device allows to increase the efficiency of its operation in deep wells. with

Sources of information: p 1. Copyright certificate of the USSR Mo954562 E21843/00, 1982 (prototype). with

Claims (1)

The formula of the invention is an electro-hydraulic well device containing a generator and an electrically connected system of 470 arrester electrodes, which is distinguished by the fact that the generator of high-voltage voltage pulses is placed on the /-Sh-s power cable in the well and is electrically connected through the forming cable line with a system of electrodes of the arrester, and in the opening of the forming cable line, a sharpener of high-voltage "" voltage pulses is connected in series, and the system of electrodes of the arrester is placed on the open surface of the frame of the surface layer of the collector. name) (about) name) - 70 syu" 60 b5