WO2009000177A1

WO2009000177A1 - Environment-friendly apparatus for inhibiting paraffin and scales and reducing viscosity

Info

Publication number: WO2009000177A1
Application number: PCT/CN2008/070761
Authority: WO
Inventors: Biqi Wang; Changhai Wang
Original assignee: Biqi Wang; Changhai Wang
Priority date: 2007-06-22
Filing date: 2008-04-22
Publication date: 2008-12-31
Also published as: CN101328796A; CN101328796B

Abstract

An environment-friendly apparatus for paraffin and scales inhibition and viscosity reduction includes a jet ultrasonic oscillator(3), an ultrasonic cavitating chamber(4) and a cyclone(1). The cyclone(1) is designed as the inlet of the apparatus and is followed by a jet ultrasonic generator(2), the jet ultrasonic oscillator(3) and the ultrasonic cavitating chamber(4) in turn. The ultrasonic cavitating chamber(4) is designed as the outlet of the apparatus. The apparatus has better effect in paraffin and scales inhibition and viscosity reduction. It enhances the flowability of oil, improves the efficient of pumps, increases the oil production of wells and needn't any additional power. It is safe, environment-friendly and applicable to various types of oil wells and applicable to oil wells with various paraffin and water contents.

Description

Environmentally friendly anti-wax anti-scaling and viscosity reducer

Technical field

The invention relates to an oil exploitation device and is an environment-friendly anti-wax anti-scaling and viscosity-reducing device for underground oil pumping.

Background technique

In the existing oilfields in China, the medium-high waxy oil wells with a wax content of 10-40% are more than 80%, the wax content is high, the viscosity of the crude oil is increased, the fluidity is lowered, and the oil is easily condensed and accumulated, thereby causing oil. The screen and the upper and lower parts of the oil pump are fouled, increasing the useless power consumption of the pump, reducing the oil output, and even completely blocking the wellbore and stopping production.

In order to solve the general problem of crude oil paraffin crystal plugging, which is a common problem in oil field production, anti-wax and viscosity-reducing products have emerged in recent years. The existing technology belongs to the technical field of jet ultrasonic theory, and its product structure is composed of a jet generator, an ultrasonic oscillator, a cavitation chamber, a vortex deflector and a vortex jet. Its working principle is to make the effect of mechanical vibration, cavitation and thermal effect when the crude oil passes through the above several parts to achieve the effect of preventing wax from increasing viscosity and increasing flow. In the practical application of similar products, there are two main problems. First, the product structure is unreasonable and unscientific. Since the structure of similar products is combined by jet-ultrasound-cavitation-swirl, under the action of external force, after the liquid is ultrasonically irradiated by the jet, the sound wave should be propagated in the longitudinal direction, but after swirling, Interference and weakening the propagation of sound waves, greatly reducing the role of ultrasonic waves in the crude oil medium, so that the effects of anti-wax, anti-scaling, viscosity reduction and energy saving fail to achieve the best results. Second, the ultrasonic sound field is weak. The sound field in the same kind of product is that the crude oil generates ultrasonic waves through the jet jet excitation reed, because the liquid ejected from the jet trap contains various harmonic components, and only one frequency of the wave energy resonates with the reed, so that the crude oil passes through The jet ultrasonic amplitude is not large, the sound field is not strong, and the expected ultrasonic effect cannot be achieved. These defects of the product restrict the further improvement of its use value.

Summary of the invention

The object of the present invention is to solve the problem that the existing similar products have unreasonable structure, the ultrasonic sound field intensity is weak, and the anti-wax and viscosity-reducing effect is not ideal, and a truly super-environmental anti-wax anti-scaling and viscosity-reducing device is provided.

The invention aims at improving the existing similar products, adding a first-stage jet ultrasonic signal generator, and scientifically and rationally adjusting each part. Using a jet effect of liquid, a series of treatments such as swirling jet ultrasonic technology, the extracted crude oil is subjected to swirling agitation - generating harmonics - forming an ultrasonic signal - to obtain higher-intensity ultrasonic oscillations, thereby making crude oil The medium has the physical effects of electrical, optical, mechanical and other comprehensive effects and is highly soluble and emulsified, ultimately achieving the remarkable effects of anti-wax, anti-scaling, viscosity-reducing, energy-saving and increasing the yield of single-well crude oil.

The specific solution of the present invention comprises: a jet ultrasonic oscillator, an ultrasonic cavitation chamber, and a cyclone, wherein: the cyclone is an inlet end, and a jet ultrasonic signal is connected to the rear end of the cyclone, and then The butt jet ultrasonic oscillator, the ultrasonic cavitation chamber, and the outer end of the ultrasonic cavitation chamber are outlets.

In the present invention, the cyclone includes a tube, and at least one swirling sheet is disposed in the front portion of the tube. The jet ultrasonic signal generator of the present invention has substantially the same structure as the jet ultrasonic oscillator, and both of them comprise a tube tube, a front portion of the tube tube is provided with a jet device base, and a jet nozzle is embedded in the front portion of the base of the jet device The nozzle of the jet nozzle is rectangular and flat, and a rear piece of the base of the jet device is suspended with a reed which is arranged opposite to the nozzle of the jet nozzle and spaced apart from the same horizontal plane; and the jet ultrasonic signal is arranged The reed size and shape of the reed and jet ultrasonic oscillation Similarly, the width of the nozzle of the jet nozzle in the jet ultrasonic transmitter is greater than the width of the nozzle of the jet nozzle in the jet ultrasonic oscillator.

In the jet ultrasonic signal transmitter of the present invention, the front and rear end edges of the reed mounted on the base of the fluidic device are chamfered on the upper and lower sides to form a sharp corner, and two mounting legs extend outwardly on both sides of the reed. There are four mounting slots on the base of the jet device. The four mounting legs on the reed are respectively embedded in the four mounting slots on the base of the jet device, and are fixed by pressing blocks and screws.

In the jet ultrasonic oscillator of the present invention, the front and rear end edges of the reed mounted on the base of the fluidic device are chamfered on the upper and lower sides to form a sharp-edged edge, and two mounting legs extend outwardly on both sides of the reed; There are four mounting slots on the base of the jet device. The four mounting legs on the reed are respectively embedded in the four mounting slots on the base of the jet device, and are fixed by pressing blocks and screws.

In the jet ultrasonic signal transmitter of the present invention, the reed is equal to the nozzle of the jet nozzle.

In the jet ultrasonic oscillator of the present invention, the reed is equal to the nozzle of the jet nozzle.

The working principle of the invention is as follows: Under the power of the oil pump, the crude oil flows through the cyclone at a high speed, and sufficient agitation can be obtained in the cavity to generate rich harmonics. The high-density-rich raw oil flows through the jet ultrasonic transducer to excite the reed while generating a large number of ultrasonic waves with the same natural frequency as the reed. A large amount of crude oil having the same frequency as the natural frequency is formed, and a high-speed carrier liquid film is formed through the jet ultrasonic oscillator mouth, and the liquid film ejection excites the oscillation reed to generate strong ultrasonic oscillation in the ultrasonic cavitation chamber. Therefore, the crude oil medium has a series of wonderful effects such as electric, optical, mechanical and other comprehensive physical and chemical effects, and is highly melted and emulsified, and finally achieves remarkable effects of anti-wax, anti-scaling, viscosity reduction, energy saving and high yield.

The high-intensity, high-energy ultrasonic wave propagates longitudinally at a speed of 1295m/s, and a super-strong acoustic wave field is generated in the crude oil in the production pipe, thereby changing the state of the crude oil during the output process. The state presented by the process is called the state of sound field motion. According to the theory of relative motion, crude oil moves at a speed of 1295 m/s relative to sound waves. "In the temperature range of waxing, the amount of wax and the flow rate are approximately normal. When the flow rate reaches a certain value, the amount of wax is drastically decreased with the increase of the flow rate" (The "Engineering Engineering" edited by Prof. Wan Renxi). Since the speed of crude oil in the sound field far exceeds the critical speed that can cause the amount of wax to drop sharply, the normal motion state of crude oil in the entire output pipeline is destroyed and converted into the state of sound field motion, which restricts it to a large extent. Formation of wax crystals. In the same way, since the mechanism of scale formation and wax formation undergoes processes such as nucleation, aggregation growth, wall adsorption, and contiguous expansion, the scale is also restricted to a large extent in the sound field motion state. Formation. The high-speed movement of the crude oil output relative to the sound field velocity further promotes the emulsification of the stock solution. Therefore, changing the crude oil output under normal motion state as the crude oil output under the sound field motion state will further strengthen the anti-wax, anti-scaling and viscosity-reducing effects. In addition, this product has obvious environmental protection effects. Because the viscosity of crude oil is reduced, the power consumption is reduced, and the electric energy is saved. The purpose of anti-wax and anti-scaling is obtained by physical means, eliminating or reducing the traditional hot and chemical cleaning, saving energy, and having no oil layer or surface. Pollution.

The structure of the invention is scientific and reasonable, and in particular, the jet ultrasonic signal generator is added in a breakthrough manner, so that the invention has the functions of super wax anti-sticking and anti-scaling, greatly increasing the fluidity of the crude oil, improving the pump efficiency and increasing the oil well production. It does not require additional power, is safe and environmentally friendly, and is suitable for different types of production wells, as well as for oil wells with different wax content and water content.

DRAWINGS

Figure 1 is a front cross-sectional view showing the overall structure of the present invention;

Figure 2 is an A-A view of Figure 1;

Figure 3 is a plan view of the reed of the jet ultrasonic signal generator of the present invention. Figure 4 is a front elevational view of the jet ultrasonic signal transmitter of the present invention;

Figure 5 is a left side view of the jet ultrasonic signal transmitter of the present invention;

Figure 6 is a plan view of the jet ultrasonic signal generator of the present invention;

Figure 7 is a B-B view of Figure 5;

In the figure: 1-cyclone, 2-jet ultrasonic signal generator, 3-jet ultrasonic oscillator, 4-ultrasonic cavitation chamber, 5-swirl, 6-tube, 7-tube, 8-jet Device base, 9-jet nozzle, 10-reed, 11-clamp, 12-screw, 13-mounting foot.

detailed description

Referring to Figure 1, the present invention is formed by a cyclone 1, a jet ultrasonic signal generator 2, a jet ultrasonic oscillator 3, and an ultrasonic cavitation chamber 4; the left end of the outer cyclone 1 is an inlet end, and the ultrasonic space is empty. The right end of the chamber 4 is the outlet end.

Here, the specific structure of the cyclone 1 in the present invention is shown in Fig. 1 and Fig. 2. It has a tube 6, and the two ends of the tube 6 are made into a docking structure; the front part of the tube 6 is internally provided with three swirl sheets 5 (or one or more pieces).

Referring to Figures 4, 5, 6, and 7, a specific structure of the jet ultrasonic signal generator 2 of the present invention has a tube 7 in which both ends of the tube 7 are made to be butted; a front portion of the tube 7 is provided with a jet device base. a jet 8 is embedded in the front portion of the base 8 of the fluidizing device. The inner cavity of the jet nozzle 9 is a louver cavity, the cross section is approximately trapezoidal, and the inner wall of the cavity is designed as a circular arc surface; the nozzle of the jet nozzle 9 is rectangular Flat, long X width is 30x3.5mm. A reed 10 (made of 2.5 mm thick stainless steel shrapnel) is suspended in the rear section of the base 8 of the fluidic device, and the reed 10 is disposed opposite to the nozzle of the jet nozzle 9 and spaced apart from each other by a horizontal plane (2 mm). The specific structure of the reed 10 is shown in Fig. 3. The front and rear edges of the reed 10 are chamfered on the upper and lower sides, forming a sharp-edged edge, and two mounting legs are outwardly extended on both sides thereof. 13. Four mounting slots are opened at corresponding positions on the base 8 of the fluidizing device, and the four mounting legs 13 of the reed 10 are placed in the four mounting slots on the base 8 of the flow device, and are fixed by the pressing block 11 and the screws 12, that is, Jet ultrasonic signal transmitter 2.

The specific structure of the jet ultrasonic oscillator 3 in the present invention is substantially the same as that of the jet ultrasonic transducer 2, in particular, the reeds 10 are identical in shape, except that: the jet nozzle of the jet ultrasonic oscillator 3 The dimension length X is 30 x 2 (mm), that is, the width of the spout is smaller than the width of the spout of the jet nozzle of the jet ultrasonic transmitter 2.

In the ultrasonic cavitation chamber 4 of the present invention, the joints of the two ends of the seamless steel tube can be directly used.

The present invention is constructed by sequentially connecting the above-mentioned cyclone 1, jet ultrasonic signal generator 2, jet ultrasonic oscillator 3, and ultrasonic cavitation chamber 4.

Claims

Claim

1. Environmentally-friendly anti-wax anti-scaling and viscosity-reducing device, including jet ultrasonic oscillator, ultrasonic cavitation chamber and cyclone, characterized in that: the cyclone is the inlet end, and the rear end of the cyclone is connected with a jet ultrasonic signal. Then, the jet ultrasonic ultrasonic oscillator and the ultrasonic cavitation chamber are sequentially connected, and the outer end of the ultrasonic cavitation chamber is an outlet.

2. The environmentally-friendly anti-wax anti-scaling and viscosity-reducing device according to claim 1, wherein: the cyclone comprises a tube, and at least one swirling sheet is disposed in a front portion of the tube.

3. The environmentally-friendly anti-wax anti-scaling and viscosity-reducing device according to claim 1, wherein: the jet ultrasonic signal generator has substantially the same structure as the jet ultrasonic oscillator, and both of them comprise a tube, a tube A jetting device base is arranged in the front section, and a jet nozzle is embedded in the front section of the base of the jet device. The jet nozzle has a rectangular flat shape, and a rear piece of the base of the jet device is suspended with a reed, the reed and the jet The nozzles of the nozzles are directly opposite and arranged at the same horizontal plane; and the reeds in the jet ultrasonic signal generator have the same size and shape as the reeds in the ultrasonic vibration of the jet, but the nozzles of the jet nozzles in the jet ultrasonic signal generator The width is greater than the width of the spout of the jet nozzle in the jet ultrasonic oscillator.

4. The environmentally-friendly anti-wax anti-scaling and viscosity-reducing device according to claim 3, wherein: the front and rear ends of the reeds mounted on the base of the jet device in the jet ultrasonic messenger are chamfered on the upper and lower sides. Forming a sharp-edged edge, two mounting legs extend outwardly on both sides of the reed; four mounting slots are correspondingly formed on the base of the fluidic device, and four mounting legs on the reed are respectively mounted on the base of the fluidic device The four mounting slots are fixed by clamps and screws.

The environment-friendly anti-wax anti-scaling and viscosity-reducing device according to claim 3, wherein: the front and rear end edges of the reeds mounted on the base of the jet device in the jet ultrasonic oscillator are chamfered on the upper and lower sides, forming The two sides of the reed have two mounting legs outwardly; on the base of the jet device, there are four mounting slots, and four mounting legs on the reed are respectively embedded in the four bases of the jet device In the mounting groove, it is fixed by clamps and screws.

6. The environmentally-friendly anti-wax anti-scaling and viscosity-reducing device according to claim 3, wherein: in the jet ultrasonic signal generator, the reed is equal to the spout of the jet nozzle.

The environmentally-friendly anti-wax anti-scaling and viscosity-reducing device according to claim 3, wherein in the jet ultrasonic oscillator, the reed and the nozzle of the jet nozzle are equal in width.