Shear viscosity reduction cyclone device

Abstract

The present invention belongs to the technical field of oil-water separation, and in particular, relates to a shear viscosity reduction cyclone device. The device includes a cyclone and a viscosity reduction pipe, a liquid inlet is tangentially arranged on the peripheral surface of the cyclone, a first overflow port is arranged at one axial end of the cyclone, a second overflow port is arranged at the other axial end of the cyclone, the viscosity reduction pipe is arranged on the outside of the cyclone, and the viscosity reduction pipe and the liquid inlet are coaxially connected. The shear viscosity reduction cyclone device disclosed in the present invention is a mechanical viscosity reduction treatment method, which does not require the addition of a viscosity reduction and pour point reduction agent or heating to achieve viscosity reduction, saves energy consumption, saves manpower, improves efficiency, and has a good viscosity reduction effect.

Description

Technical Field

[0001] The invention belongs to the technical field of oil-water separation, and in particular relates to a shear viscosity reduction cyclone device. Background Art

[0002] Hydrocyclones, also known as hydrocyclone separators, first appeared in the Netherlands in the late 1930s. At present, oil-water separation equipment has become an indispensable part of petroleum engineering and oilfield wastewater treatment. In oil fields in many countries, especially on offshore platforms, due to space limitations, hydrocyclones are widely used to dehydrate crude oil or deoil oilfield wastewater to achieve reinjection after separation.

[0003] At present, most of the oilfield development in my country has entered the middle and late stages, and the water content of oil wells is getting higher and higher. How to deal with the produced water is a thorny problem that many oilfields have to face. With the deepening of research, a complete set of oil-water separation devices based on cyclone equipment has been basically formed. The cyclone separator used for oil-water separation shows a good separation effect in the downhole environment. However, it is found that most oil wells need to be fracturing and adjusted for infill well spacing during the mining process, especially in the later stage of water injection development. The viscosity of underground crude oil increases, resulting in a sharp decline in the separation performance of the cyclone separation equipment. Not only that, the excessive viscosity of crude oil will also increase its freezing point, causing many difficulties in the mining, transportation, storage and transportation of crude oil. Therefore, reducing the viscosity of crude oil has become a difficult problem that the current oilfield industry needs to solve urgently.

[0004] The viscosity of crude oil produced liquid and oily wastewater can be reduced by adding viscosity reducers or heating. However, viscosity reducers are mostly disposable consumables, and the cost of large-scale viscosity reduction in the oilfield industry is too high. The heating viscosity reduction method is not only energy-intensive, but also time-consuming and labor-intensive, and the viscosity reduction effect is poor. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a shear viscosity reduction cyclone device to solve the technical problems of high cost, serious energy consumption, time and labor consumption, and poor viscosity reduction effect caused by the viscosity reduction methods of crude oil produced liquid and oily wastewater in the prior art.

[0006] The technical solution of the present invention is:

[0007] A shear viscosity reduction cyclone device, the device comprising:

[0008] A cyclone, wherein a liquid inlet is tangentially arranged on the circumferential surface of the cyclone, a first overflow port is arranged at one axial end of the cyclone, and a second overflow port is arranged at the other axial end of the cyclone;

[0009] The viscosity reducing pipe is arranged on the outside of the cyclone, and the viscosity reducing pipe is coaxially connected with the liquid inlet.

[0010] Furthermore, the viscosity reducing tube includes a tube body and a shear sheet group, the shear sheet groups are arranged in sequence along the axial direction of the tube body, each of the shear sheet groups includes multiple shear sheets, each of the shear sheets is arranged parallel to the axial direction of the tube body, both sides of each shear sheet are fixedly connected to the inner wall of the tube body, and the shear sheets of two adjacent shear sheet groups are arranged vertically.

[0011] Preferably, there is no gap between the shear sheets of two adjacent shear sheet groups.

[0012] Preferably, both sides of each shearing piece are welded and fixedly connected to the inner wall of the tube body.

[0013] Furthermore, one axial end of the tube body is connected to a first flange, and a liquid inlet is provided in the middle of the first flange.

[0014] Furthermore, the other axial end of the tube body is connected to a second flange, a treatment liquid outlet is provided in the middle of the second flange, and the liquid inlet and the treatment liquid outlet are butt-connected.

[0015] Furthermore, the cyclone includes a main body, a cyclone separation tube and a connecting tube, the cyclone separation tube is arranged in the main body, the connecting tube is connected to the circumferential surface of the cyclone separation tube along the tangent direction of the cyclone separation tube, one end of the connecting tube is connected to the cyclone separation tube, the other end of the connecting tube passes through the main body, and the other end of the connecting tube is the liquid inlet.

[0016] Furthermore, the other end of the connecting pipe is connected to a third flange, the liquid inlet is arranged on the third flange, and the third flange is butt-jointed with the second flange.

[0017] Further, one axial end of the body is closed;

[0018] The cyclone also includes a liquid outlet pipe, one end of which is arranged in the cyclone separation pipe, the other end of which passes through an axial end of the body, the other end of which is provided with a fourth flange, and the first overflow port is arranged in the middle of the fourth flange.

[0019] Furthermore, a fifth flange is provided at the other axial end of the body, and the second overflow port is provided in the middle of the fifth flange.

[0020] The beneficial effects of the present invention include at least:

[0021] The present invention discloses a shear viscosity reduction cyclone device, which includes a cyclone and a viscosity reduction pipe, a liquid inlet is tangentially arranged on the circumferential surface of the cyclone, a first overflow port is arranged at one axial end of the cyclone, a second overflow port is arranged at the other axial end of the cyclone, and the viscosity reduction pipe is arranged on the outside of the cyclone, and the viscosity reduction pipe and the liquid inlet are coaxially connected. During implementation, the incoming liquid to be treated is first subjected to viscosity reduction treatment through the viscosity reduction pipe, and the treated liquid after viscosity reduction treatment enters the cyclone, and the oil-water separation of the light and heavy phases is achieved under the action of cyclonic separation, the oil phase of the light phase is discharged through the first overflow port, and the water phase of the heavy phase is discharged through the second overflow port. In this oil-water separation process, when the treated liquid after viscosity reduction through the viscosity reduction pipe enters the cyclone for separation, the oil-water separation effect of the cyclone will be greatly improved due to the reduction of its viscosity.

[0022] Therefore, the shear viscosity reduction cyclone device disclosed in the present invention is a mechanical viscosity reduction treatment method, which does not require the addition of viscosity reduction and pour point reduction agents or heating to achieve viscosity reduction, saves energy consumption, saves manpower, improves efficiency, and has a good viscosity reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 Schematic diagram of the structure of a shear viscosity reduction cyclone device of this embodiment;

[0025] Figure 2 for Figure 1 A schematic diagram of a quarter section of

[0026] Figure 3 for Figure 1 Exploded view of.

[0027] Figure 4 for Figure 1 A schematic diagram of the structure of the cyclone in FIG.

[0028] Figure 5 for Figure 1 Schematic diagram of the internal structure of the cyclone;

[0029] Figure 6 for Figure 1 The structural schematic diagram of the viscosity reducing tube in FIG.

[0030] Figure 7 for Figure 6 A half-section diagram of

[0031] Figure 8 for Figure 6 Schematic cross-section of .

[0032] In the accompanying drawings: cyclone 1, main body 101, cyclone separation pipe 102, connecting pipe 103, third flange 104, liquid outlet pipe 105, fourth flange 106, fifth flange 107, viscosity reduction pipe 2, pipe body 201, shear piece 202, first flange 203, second flange 204, first overflow port 3, second overflow port 4, liquid inlet 5, incoming liquid inlet 6, treated liquid outlet 7. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Figure 1 is a schematic structural diagram of a shear viscosity reduction cyclone device of this embodiment, Figure 2 for Figure 1 A quarter-section diagram of Figure 3 for Figure 1 Exploded view of. Figure 1-Figure 3 The shear viscosity reduction cyclone device of this embodiment includes a cyclone 1 and a viscosity reduction pipe 2, wherein a liquid inlet 5 is tangentially arranged on the circumferential surface of the cyclone 1, a first overflow port 3 is arranged at one axial end of the cyclone 1, and a second overflow port 4 is arranged at the other axial end of the cyclone 1, the viscosity reduction pipe 2 is arranged on the outside of the cyclone 1, and the viscosity reduction pipe 2 and the liquid inlet 5 are coaxially connected.

[0035] When the shear viscosity reduction cyclone device disclosed in this embodiment is implemented, the incoming liquid to be treated is first subjected to viscosity reduction treatment through the viscosity reduction pipe 2, and the treated liquid after the viscosity reduction treatment enters the cyclone 1, and the oil-water separation of the light and heavy phases is achieved under the action of cyclone separation, the oil phase of the light phase is discharged through the first overflow port 3, and the water phase of the heavy phase is discharged through the second overflow port 4. In this oil-water separation process, when the treated liquid after viscosity reduction through the viscosity reduction pipe 2 enters the cyclone 1 for separation, the oil-water separation effect of the cyclone 2 will be greatly improved due to the reduction of its viscosity.

[0036] Figure 4 for Figure 1 The schematic diagram of the structure of the cyclone in FIG. Figure 5 for Figure 1 Schematic diagram of the internal structure of the cyclone. Figure 4-Figure 5In this embodiment, the cyclone 1 includes a body 101, a cyclone separation tube 102 and a connecting tube 103. The cyclone separation tube 102 is arranged in the body 101, and the connecting tube 103 is connected to the peripheral surface of the cyclone separation tube 102 along the tangent direction of the cyclone separation tube 102. One end of the connecting tube 103 is connected to the cyclone separation tube 102, and the other end of the connecting tube 103 passes through the body 101. The other end of the connecting tube 103 is the liquid inlet 5.

[0037] Combination Figure 4 as well as Figure 5 In this embodiment, the other end of the connecting pipe 103 is connected to the third flange 104 , the liquid inlet 5 is arranged on the third flange 104 , and the viscosity reducing pipe 2 is connected to the third flange 104 .

[0038] Combination Figure 4 as well as Figure 5 In this embodiment, one axial end of the body 101 is closed, and the cyclone 1 also includes a liquid outlet pipe 105, one end of the liquid outlet pipe 105 is arranged in the cyclone separation tube 102, and the other end of the liquid outlet pipe 105 passes through the axial end of the body 101. A fourth flange 106 is arranged at the other end of the liquid outlet pipe 105, and the first overflow port 3 is arranged in the middle of the fourth flange 106.

[0039] Furthermore, combined with Figure 4 as well as Figure 5 In this embodiment, a fifth flange 107 is disposed at the other axial end of the body 101 , and the second overflow port 4 is disposed in the middle of the fifth flange 107 .

[0040] In this embodiment, the third flange 104 and the fifth flange 107 are devices used to connect and fix the device to other external devices.

[0041] Figure 6 for Figure 1 The structural diagram of the viscosity reduction tube in the Figure 7 for Figure 6 A half-section diagram of Figure 8 for Figure 6 Schematic diagram of the cross section. Figure 6-Figure 8 In this embodiment, the viscosity reduction tube 2 includes a tube body 201 and a shearing piece group. The shearing piece groups are arranged in sequence along the axial direction of the tube body 201. Each shearing piece group includes a plurality of shearing pieces 202. Each shearing piece 202 is arranged parallel to the axial direction of the tube body 201. Both sides of each shearing piece 202 are fixedly connected to the inner wall of the tube body 201. The shearing pieces 202 of two adjacent shearing piece groups are arranged vertically. When the oil-water mixture enters the cavity, it will follow the law of "division-displacement-overlapping", generate violent vortices in the direction of the flow section, generate strong shear force on the mixture, break the polymer structure in the mixture and mix it, and then achieve the shear viscosity reduction effect.

[0042] Combination Figure 7 as well as Figure 8 In this embodiment, there is no gap between the shear pieces 202 of two adjacent shear piece groups. The viscosity reduction effect is enhanced by connecting the vertical gapless shear piece groups in series. Compared with the gap setting between the shear pieces 202 of two adjacent shear piece groups, in this embodiment, the gapless setting of the shear pieces 202 of two adjacent shear piece groups can ensure that the oil-water mixture generates violent vortices in each flow section, prevent the formation of sticky clusters enriched with high-viscosity molecules, and avoid the flow field channel selection phenomenon of the sticky clusters of high-viscosity molecules in the section without blades in the separator, thereby improving the shear viscosity reduction effect.

[0043] In this embodiment, the shearing pieces 202 of two adjacent shearing piece groups may be connected together by welding. Of course, they may also directly abut against each other, which is not limited in this embodiment.

[0044] Preferably, in this embodiment, both sides of each shearing piece 2202 are welded and fixedly connected to the inner wall of the tube body 201 .

[0045] Furthermore, combined with Figure 7 as well as Figure 8 In this embodiment, one axial end of the tube body 201 is connected to a first flange 203 , and a liquid inlet 6 is disposed in the middle of the first flange 203 .

[0046] Combination Figure 7 as well as Figure 8 In this embodiment, the other axial end of the tube body 201 is connected with a second flange 204, and the second flange 204 and the third flange 104 are butt-jointed to realize the assembly of the viscosity reduction tube 2 and the cyclone 1, and a treatment liquid outlet 7 is provided in the middle of the second flange 204, and the liquid inlet and the treatment liquid outlet are butt-jointed to realize the connection between the viscosity reduction tube 2 and the cyclone 1.

[0047] In summary, the shear viscosity reduction cyclone device disclosed in this embodiment is a mechanical viscosity reduction treatment method, which does not require the addition of viscosity reduction and pour point reduction agents or heating to achieve viscosity reduction, saves energy and manpower, improves efficiency, and has a good viscosity reduction effect.

[0048] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the description of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field may, without departing from the scope of the technical features of the present invention, make partial changes or modifications to the technical contents disclosed in the present invention, and the equivalent embodiments without departing from the technical features of the present invention are still within the scope of the technical features of the present invention.

Claims

1. A shear viscosity reduction cyclone device, characterized in that: The device comprises: A cyclone, wherein a liquid inlet is tangentially arranged on the circumferential surface of the cyclone, a first overflow port is arranged at one axial end of the cyclone, and a second overflow port is arranged at the other axial end of the cyclone; A viscosity reducing pipe, the viscosity reducing pipe is arranged outside the cyclone, and the viscosity reducing pipe is coaxially connected to the liquid inlet; The viscosity reducing tube comprises a tube body and a shearing piece group, wherein the shearing piece groups are sequentially arranged along the axial direction of the tube body, each of the shearing piece groups comprises a plurality of shearing pieces, each of the shearing pieces is arranged parallel to the axial direction of the tube body, both sides of each of the shearing pieces are fixedly connected to the inner wall of the tube body, and the shearing pieces of two adjacent shearing piece groups are arranged vertically; There is no gap between the shearing pieces of two adjacent shearing piece groups; One axial end of the tube body is connected to a first flange, and a liquid inlet is arranged in the middle of the first flange.

2. A shear viscosity reduction cyclone device according to claim 1, characterized in that: Both sides of each shearing piece are welded and fixedly connected to the inner wall of the tube body.

3. A shear viscosity reduction cyclone device according to claim 2, characterized in that: The other axial end of the tube body is connected with a second flange, a treatment liquid outlet is arranged in the middle of the second flange, and the liquid inlet and the treatment liquid outlet are butt-connected.

4. A shear viscosity reduction cyclone device according to claim 3, characterized in that: The cyclone comprises a body, a cyclone separation tube and a connecting tube, wherein the cyclone separation tube is arranged in the body, the connecting tube is connected to the peripheral surface of the cyclone separation tube along the tangent direction of the cyclone separation tube, one end of the connecting tube is connected to the cyclone separation tube, the other end of the connecting tube passes through the body, and the other end of the connecting tube is the liquid inlet.

5. A shear viscosity reduction cyclone device according to claim 4, characterized in that: The other end of the connecting pipe is connected to a third flange, the liquid inlet is arranged on the third flange, and the third flange is butt-jointed with the second flange.

6. A shear viscosity reduction cyclone device according to claim 4, characterized in that: One axial end of the body is closed; The cyclone also includes a liquid outlet pipe, one end of which is arranged in the cyclone separation pipe, the other end of which passes through an axial end of the body, the other end of which is provided with a fourth flange, and the first overflow port is arranged in the middle of the fourth flange.

7. A shear viscosity reduction cyclone device according to claim 4, characterized in that: A fifth flange is disposed at the other axial end of the body, and the second overflow port is disposed in the middle of the fifth flange.

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