CN215292414U

CN215292414U - Hydraulic oscillation generating device

Info

Publication number: CN215292414U
Application number: CN202120575481.4U
Authority: CN
Inventors: 蒋维军; 刘艳英; 吴东明; 杨文超
Original assignee: Tianjin Keruitewei Technology Development Co ltd; Tianjin Yuanhai Oil Extraction Science & Technology Co ltd
Current assignee: Tianjin Keruitewei Technology Development Co ltd; Tianjin Yuanhai Oil Extraction Science & Technology Co ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-12-24
Anticipated expiration: 2031-03-22

Abstract

The utility model relates to a hydraulic oscillation generating device, including top connection, bearing and lower clutch, the top connection passes through the bearing rotation with the lower clutch and is connected, is equipped with the connector link that is used for being connected with oil pipe on the inside wall of top connection upper end, is equipped with annular ka tai on the inner wall of top connection lower extreme, and the terminal surface laminating under ka tai top surface and the annular dog, is equipped with the nozzle of a plurality of circumference equipartitions and slope on the lateral wall of lower clutch, and the check valve is installed to the lower clutch lower extreme, and thick two are thin in the middle of the inner chamber of nozzle. The utility model discloses a nozzle inner chamber has formed that a both ends are thin, and middle thick structure has also formed well-known "Helmholtz chamber", and is passing through at the fluid like this the utility model discloses back can produce the pressure oscillation, causes and produces the acoustic oscillation, clears away the jam of pollutions such as mechanical impurity, dirt and pitch in the near wellbore area, and the cleaning performance is good to reach hydraulic oscillation and solve stifled purpose. The utility model discloses have concurrently and vibrate and wash difunctional, simple structure, the production degree of difficulty is little, low in production cost.

Description

Hydraulic oscillation generating device

Technical Field

The utility model relates to an oil well washs technical field, especially relates to a hydraulic oscillation generating device.

Background

At present, the blockage removing method in an oil well can be divided into two categories of chemical blockage removing and physical blockage removing; chemical unplugging is often costly and complicated with subsequent effects on the formation. The physical blockage removal is mainly hydraulic fracturing, high-energy gas fracturing, hole patching, sidetracking and the like at present. The hydraulic oscillation technology is a known mature technology, but the existing hydraulic oscillation device has a solidified structure and is difficult to manufacture; the outer diameter of a tool for connecting an oil pipe is too small, so that the oscillation blockage removing effect is not ideal and the cleaning effect is poor.

Disclosure of Invention

The utility model aims to solve the defects of the prior art and provides a hydraulic oscillation generating device.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: a hydraulic oscillation generating device comprises an upper joint, a bearing and a lower joint, wherein the upper joint is rotatably connected with the lower joint through the bearing, a connecting buckle used for being connected with an oil pipe is arranged on the inner side wall of the upper end of the upper joint, an annular stop block is clamped on the inner side wall of the upper joint, an internal thread is arranged on the inner side wall of the lower end of the annular stop block, the upper end of the lower joint extends into the annular stop block and is in threaded connection with the annular stop block, two continuous annular steps are arranged on the outer side wall of the lower joint, the annular step positioned above is called an upper step, the annular step positioned below is called a lower step, the lower end of the upper joint is jointed with the lower step, an annular clamping table is arranged on the inner wall of the lower end of the upper joint, the top surface of the clamping table is jointed with the lower end surface of the annular stop block, the bottom surface of the clamping table is jointed with the upper step, and an annular cavity is formed among the inner side wall of the clamping table, the outer side wall of the lower joint, the lower end surface of the annular stop block and the upper step, the bearing is positioned in the annular cavity, the outer side wall of the lower joint is provided with a plurality of nozzles which are uniformly distributed and inclined circumferentially, one end of each nozzle is communicated with the inner cavity of the lower joint, the end, communicated with the inner cavity of the lower joint, of each nozzle is higher than the other end of each nozzle, and the lower end of the lower joint is provided with a one-way valve;

the middle of the inner cavity of the nozzle is thick, and the two ends of the inner cavity of the nozzle are thin.

The plurality of nozzles are distributed on the lower joint in a non-radial mode.

The utility model has the advantages that: the utility model discloses a nozzle inner chamber has formed that a both ends are thin, and middle thick structure has also formed well-known "Helmholtz chamber", and is passing through at the fluid like this the utility model discloses back can produce the pressure oscillation, causes and produces the acoustic oscillation, clears away the jam of pollutions such as mechanical impurity, dirt and pitch in the near wellbore area, and the cleaning performance is good to reach hydraulic oscillation and solve stifled purpose. The one-way valve at the bottom of the lower joint can realize forward and reverse well washing operation, when a well is washed forwards, the one-way valve is closed, the well washing liquid realizes high-pressure oscillation well washing through the nozzle, and when the well is washed backwards, the one-way valve is opened, so that a large-discharge-capacity backwashing channel can be formed. The utility model discloses have concurrently and vibrate and wash difunctional, simple structure, the production degree of difficulty is little, low in production cost.

Drawings

FIG. 1 is a diagram illustrating the usage of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the distribution of nozzles;

FIG. 4 is a schematic view of the nozzle bore configuration;

in the figure: 1-upper joint; 2-lower joint; 3-connecting a buckle; 4-oil pipe; 5-an annular stop block; 6-step up; 7-lower step; 8-a bearing; 9-a nozzle; 10-a one-way valve; 11-a clamping table; 12-a well casing;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in figures 1 to 3, a hydraulic oscillation generating device comprises an upper joint 1, a bearing 8 and a lower joint 2, wherein the upper joint 1 is rotatably connected with the lower joint 2 through the bearing 8, a connecting buckle 3 used for being connected with an oil pipe 4 is arranged on the inner side wall of the upper end of the upper joint 1, an annular stop block 5 is clamped on the inner side wall of the upper joint 1, inner threads are arranged on the inner side wall of the lower end of the annular stop block 5, the upper end of the lower joint 2 extends into the annular stop block 5 and is in threaded connection with the annular stop block 5, two continuous annular steps are arranged on the outer side wall of the lower joint 2, the annular step positioned above is called an upper step 6, the annular step positioned below is called a lower step 7, the lower end of the upper joint 1 is jointed with the lower step 7, an annular clamping table 11 is arranged on the inner wall of the lower end of the upper joint 1, the top surface of the clamping table 11 is jointed with the lower end surface of the annular stop block 5, the bottom surface of the clamping table 11 is jointed with the upper step 6, an annular cavity is formed among the inner side wall of the clamping table 11, the outer side wall of the lower connector 2, the lower end face of the annular stop block 5 and the upper step 6, the bearing 8 is positioned in the annular cavity, a plurality of nozzles 9 which are uniformly distributed and inclined in the circumferential direction are arranged on the outer side wall of the lower connector 2, one end of each nozzle 9 is communicated with the inner cavity of the lower connector 2, one end of each nozzle 9 communicated with the inner cavity of the lower connector 2 is higher than the other end, and a one-way valve 10 is arranged at the lower end of the lower connector 2;

the middle of the inner cavity of the nozzle 9 is thick, and the two ends are thin.

Several nozzles 9 are distributed non-radially on the lower joint 2.

The application method of the hydraulic oscillation generating device comprises the following steps:

firstly, an oil pipe 4 is utilized to lower a hydraulic oscillation generating device to an artificial well bottom or a well bottom sediment surface;

injecting a flushing liquid by a ground reverse circulation pump to perform flushing operation, wherein the flushing liquid flows in from the outside of the hydraulic oscillation generating device by oscillation cleaning, a check valve 10 at the lower end of the lower connector 2 is jacked up to enter the hydraulic oscillation generating device, then the flushing liquid returns to the ground along the inner cavity of the oil pipe 4, the flushing liquid pumped out of the oil pipe 4 flows into the hydraulic oscillation generating device from the outside through the check valve 10 after being filtered from the outside, and the operation is repeatedly circulated until the flushing is performed to the designed well depth and the liquid is continuously pumped to return to the inside; reverse circulation can effectively improve the flow velocity of fluid in the pipe, thereby quickly carrying dirt in the well out of the shaft;

injecting a flushing fluid by a ground positive circulation pump to carry out positive flushing operation, wherein the flushing fluid flows into the hydraulic oscillation generating device through the oil pipe 4, the lower end of the lower joint 2 is plugged by the one-way valve 10, and the flushing fluid is sprayed out from a nozzle 9 on the lower joint 2 of the hydraulic oscillation generating device to realize the cleaning of the well casing 12;

and fourthly, injecting well washing liquid by using a ground reverse circulation pump to perform flushing operation until the well is flushed to the designed well depth and the liquid is pumped continuously until the well is returned to the clean state.

In the third step, the oil pipe 4 is required to be dragged continuously during cleaning, so that the well casing 12 is flushed and cleaned evenly, and the well flushing liquid is injected by a continuous pump until the annular return liquid is cleaned.

As shown in fig. 4, a steady continuous high pressure water (flushing fluid) jet is injected from the d1 port of the nozzle 9, passes through an axisymmetric chamber and is then ejected through the d2 port of the nozzle 9. The internal diameter D of the intermediate chamber of the nozzle 9 is much greater than the jet diameter, so that the flow velocity of the fluid in the chamber of the nozzle 9 is much less than the central jet velocity, and there is a severe shear motion at the interface of the jet and the fluid in the chamber. Due to the existence of viscosity, mass exchange and momentum exchange of fluid on two sides of the exchange surface can be necessarily generated, and due to the fact that vortex is generated through shearing, the pressure of the inner layer of the chamber is reduced, the pressure of the outer layer of the chamber is increased, and the vortex is transported to the downstream. When an ordered axisymmetric disturbance (such as a volute or the like) in the jet shear layer collides with the edge of the d2 orifice of the nozzle 9, a pressure pulse of a certain frequency is generated, and a vortex pulsation is induced in this region. Disturbances in the shear layer that are inherently unstable in a range of frequencies are amplified, and if the disturbances are in this range of frequencies, the vibrations will amplify the jet shear layer between the shear layer separation zone and the collision zone. The amplified disturbance moves downstream and again collides with the edge of the d2 orifice of the nozzle 9. The above processes are repeated to form a closed loop for signal generation, feedback and amplification, so that the shear layer is greatly vibrated, and a pulsating pressure field is formed in the cavity. The pressure and the flow rate of the flow speed sprayed from the d2 port of the nozzle 9 are periodically changed, so that pulse jet flow is formed, and the aim of hydraulic oscillation blockage removal is fulfilled. The nozzles 9 with different drift diameters can be replaced, the oscillation frequency is changed, and different nozzles are adopted for different stratums. Also can be in the utility model discloses the nozzle 9 of unidimensional not is installed in the liquid outlet of installation nozzle 9, just can produce different pressure oscillation frequency, reaches to compromise pit shaft, near-wellbore area and the inside unblock of stratum (the energy attenuation of high frequency wave is fast, and the distance that gets into the stratum pore is short, and the advantage is energy concentration; low frequency wave, energy decay is slowed down, and the degree of depth that gets into the stratum is big, but energy is not concentrated).

The nozzles 9 of the utility model are distributed on the lower joint 2 in a non-radial way, so that the lower joint 2 of the utility model has a tendency of self-rotation when being impacted by liquid; the 9 inner chambers of nozzle have formed that a both ends are thin, and middle thick structure has also formed well-known "Helmholtz chamber", and is passing through at the fluid like this the utility model discloses back can produce the pressure oscillation, the initiation produces the acoustic oscillation, clears away the jam of pollutions such as mechanical impurity, dirt and pitch in the near-wellbore area, and the cleaning performance is good to reach hydraulic oscillation and remove stifled purpose. The one-way valve 10 at the bottom of the lower joint 2 can realize forward and reverse well washing operation, when a well is washed forwards, the one-way valve 10 is closed, the well washing liquid realizes high-pressure oscillation well washing through the nozzle 9, and when the well is washed backwards, the one-way valve 10 is opened, so that a large-discharge backwashing channel can be formed. The utility model discloses have concurrently and vibrate and wash difunctional, simple structure, the production degree of difficulty is little, low in production cost.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. A hydraulic oscillation generating device is characterized by comprising an upper joint (1), a bearing (8) and a lower joint (2), wherein the upper joint (1) is rotatably connected with the lower joint (2) through the bearing (8), a connecting buckle (3) used for being connected with an oil pipe (4) is arranged on the inner side wall of the upper end of the upper joint (1), an annular stop block (5) is clamped on the inner side wall of the upper joint (1), an internal thread is arranged on the inner side wall of the lower end of the annular stop block (5), the upper end of the lower joint (2) extends into the annular stop block (5) and is in threaded connection with the annular stop block (5), two continuous annular steps are arranged on the outer side wall of the lower joint (2), the annular step positioned above is called an upper step (6), the annular step positioned below is called a lower step (7), the lower end of the upper joint (1) is attached to the lower step (7), an annular clamping table (11) is arranged on the inner wall of the lower end of the upper joint (1), the top surface of the clamping table (11) is attached to the lower end face of the annular stop block (5), the bottom surface of the clamping table (11) is attached to the upper step (6), an annular cavity is formed among the inner side wall of the clamping table (11), the outer side wall of the lower joint (2), the lower end face of the annular stop block (5) and the upper step (6), a bearing (8) is located in the annular cavity, a plurality of nozzles (9) which are uniformly distributed and inclined on the circumference are arranged on the outer side wall of the lower joint (2), one end of each nozzle (9) is communicated with the inner cavity of the lower joint (2), one end of each nozzle (9) communicated with the inner cavity of the lower joint (2) is higher than the other end of each nozzle, and a one-way valve (10) is installed at the lower end of the lower joint (2);

the middle of the inner cavity of the nozzle (9) is thick, and the two ends of the inner cavity are thin.

2. Hydraulic oscillation generating device according to claim 1, characterized in that several nozzles (9) are distributed non-radially on the lower joint (2).