CN210013693U

CN210013693U - Thick oil mixes thin mixing arrangement

Info

Publication number: CN210013693U
Application number: CN201920594420.5U
Authority: CN
Inventors: 胡桢; 宋正聪; 吴浩; 李国荣; 李陆伟; 刘磊; 张港
Original assignee: Henan Fu Fu Overseas Petroleum Equipment Co Ltd
Current assignee: Henan Fu Fu Overseas Petroleum Equipment Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-02-04
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses a viscous crude mixes rare mixing arrangement, its characterized in that: the oil pipe coupling is connected to the upper end of the bearing cylinder, the lower end of the bearing cylinder is provided with a filter screen, at least one group of rotary mixing assembly and at least one group of mixing grid are arranged in the bearing cylinder, and the mixing grid and the rotary mixing assembly are sequentially arranged at intervals from top to bottom. The utility model provides a viscous crude mixes thin mixing arrangement is one kind and need not plus power, mixing efficiency is high, the pressure reduces, does not change oil well production technology, does not influence the thick oil in the pit of oil well output and mixes thin mixing tool, but the injection volume of effective control thin oil improves the mixed effect in the pit.

Description

Thick oil mixes thin mixing arrangement

Technical Field

The utility model belongs to the technical field of oil field production equipment, concretely relates to viscous crude mixes thin mixing arrangement.

Background

The thick oil reserves of the oil fields in China are very rich, because the thick oil has the characteristics of special high viscosity and high solidifying point, the thinning and viscosity reduction are one of the main forms in the thick oil exploitation process, the thin oil is injected from the oil sleeve annulus, and is mixed with the thick oil and enters the oil pipe after reaching the thinning point, so that the purpose of reducing and lifting the viscosity of the thick oil is achieved. The thick oil diluting and mixing device is a main tool for improving the mixing effect in the diluting and viscosity reducing process, and has important significance for improving the utilization rate of thin oil, saving the using amount of the thin oil, making up a thin oil gap and the like. The existing thick oil and thin oil mixing device generally has the problems that the mixing effect is not ideal, the mixing pressure drop is large, the energy consumption of an oil pumping system is increased, and the waste of thin oil quantity is large.

CN102155204A discloses a jet type rotary oil mixer suitable for the production of ultra-thick oil mixed with thin oil, but it needs to directly impact the stirring impeller after the thin oil is sprayed from the nozzle, so as to provide driving force for the rotation of the impeller. The oil mixer can drive the impeller to rotate only by external force, and the nozzle structure is not practical in an oil well, so the thick oil diluting effect is not ideal.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the above-mentioned prior art, the utility model aims at providing a viscous crude mixes thin mixing arrangement, can make thin viscous crude intensive mixing, reduces the thin oil quantity to reduce the oil pumping system energy consumption.

The purpose of the utility model is realized through the following technical scheme.

The utility model provides a viscous crude mixes thin mixing arrangement, includes tubing coupling and bearing cylinder, the tubing coupling is connected in the upper end of bearing cylinder, and the lower extreme of bearing cylinder is provided with the filter sieve, is provided with at least a set of rotatory assembly of mixing and at least a set of mixed bars in the bearing cylinder, and mixed bars and rotatory assembly of mixing set up from last to down in proper order at an interval.

The bearing cylinder comprises an upper group of rotary mixing assemblies, a middle group of rotary mixing assemblies and a lower group of mixing grids, wherein the rotary mixing assemblies in the middle group are opposite to the rotary directions of the other two groups.

And a group of mixing grids are arranged at the upper swirl radius outlet of each group of rotary mixing assemblies.

And a lining is arranged between the rotary mixing assembly and the mixing grid.

The rotary mixing assembly comprises a guide shell, a mandrel and a support for supporting the mandrel in the guide shell, wherein the mandrel is sleeved with an impeller, and the impeller is limited on the mandrel through a positioning nut and a locking back cap.

The impeller includes sliding bearing seat and the radial spiral type impeller blade that distributes along sliding bearing seat excircle, and the quantity of impeller blade is 3 ~ 6, and the rotation direction can be the levogyration, also can be dextrorotation.

The inner cavity of the guide shell sequentially comprises a contraction section, a cylindrical section and a diffusion section from one end to the other end along the direction of oil flow, the cone angle of the contraction section is 8-15 degrees, and the angle of the diffusion section is 30-45 degrees.

The mixing grid is composed of a plurality of mixing grid plates which are mutually crossed, and overflowing holes are formed in the mixing grid plates.

Tens of parallel holes are distributed on the filter screen, and the aperture is 5-12 mm.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the multistage mixing units are arranged along the flowing direction of the mixed oil, the rotating directions of two adjacent groups of mixing units are opposite, when the mixed fluid passes through, the impeller is pushed to rotate and stir, so that the fluid rotates leftwards and rightwards from time to generate vortex and reverse vortex, the mixed fluid is changed from longitudinal flow into transverse flow and then into longitudinal flow again, the fluid is dispersed while the direction is changed, and the mixed fluid advances in the forms of flow dividing, flow combining, vortex and turbulent flow, so that a good radial mixing effect is generated.

2. The mixed fluid forms spiral flow under the drive of the impeller, the mixed fluid forms a large-angle impact mixing grid by virtue of the spiral shearing force of the mixed fluid, the mixed fluid generates multi-channel relative displacement in a labyrinth channel in the mixing grid to form segmentation-displacement-overlapping and also generates a violent vortex effect in the cross section direction to form vortex shearing force, so that the two-phase fluid is cut, sheared, rotated and remixed, and the purposes of good dispersion and full mixing of the fluids are achieved.

3. The mixing process completely depends on the self kinetic energy of the mixed fluid, and simultaneously the dispersing and mixing force is soft and sufficient, the head loss is much smaller than that of the traditional plane mixer, and the total flowing length is much shorter than that of the traditional plane mixer. The influence on the pressure drop of oil is small, the energy consumption is reduced, and the failure rate of the oil pumping equipment is reduced.

4. The device is easy to disassemble and assemble, the original production process of the oil well is not required to be changed during use, and the device can be matched with tools such as a diluted check valve, a leather cup sealer and the like to be used in a self-blowing well and an oil production well, and does not influence positive and negative well flushing.

In conclusion, the thick oil thin mixing device is an underground thick oil thin mixing tool which does not need external power, has high mixing efficiency, reduces pressure, does not change the production process of an oil well and does not influence the yield of the oil well, can effectively control the injection amount of thin oil and improve the underground mixing effect.

Drawings

Fig. 1 is a schematic structural diagram of the embodiment.

FIG. 2 is a schematic diagram of a rotary mixing assembly.

FIG. 3 is a schematic diagram of a rotating mixing assembly support structure.

Fig. 4 is a schematic diagram of a hybrid gate structure.

Fig. 5 is a schematic view of a left-hand impeller structure.

Fig. 6 is a schematic view of a right-hand impeller structure.

Fig. 7 is a schematic diagram of a filter screen construction.

Fig. 8 is a schematic view of the structure of the guide shell.

In the figure, 1 is a tubing coupling, 2 is a mixing grid, 3 is a bearing cylinder, 4 is a rotary mixing assembly, 5 is a filter screen, 6 is a bushing, 7 is a bracket, 8 is a guide cylinder, 9 is an impeller, 10 is a mandrel, 11 is a positioning nut, 12 is a locking back cap, 13 is a mixing grid, 14 is an overflowing hole, 15 is a sliding bearing seat, 16 is an impeller blade, 17 is a contraction section, 18 is a cylindrical section, and 19 is a diffusion section.

Detailed Description

As shown in figures 1-8, a thick oil mixes thin mixing arrangement for use when oil field oil recovery thick oil mixes thin, including tubing coupling 1 and bearing cylinder 3, tubing coupling 1 is connected in the upper end of bearing cylinder 3, and the lower extreme of bearing cylinder 3 is provided with filter sieve 5.

Tens of holes which are parallel to each other are distributed on the filter screen 5, the aperture is 5-12 mm, and the filter screen 5 is used for filtering and primarily dividing the oil flow entering the thick oil diluting and mixing device.

An upper group, a middle group and a lower group of rotary mixing assemblies 4 and three groups of mixing grids 2 are arranged in the bearing cylinder 3, wherein the rotary mixing assemblies in the middle group are opposite to the rotary directions of the other two groups, and a group of mixing grids 2 is arranged at the outlet of the upper part of the rotational radius of each group of rotary mixing assemblies 4.

A bushing 6 is arranged between the rotating mixing assembly 4 and the mixing grid 2 and is used for separating the rotating mixing assembly 4 and the mixing grid 2, and the optimal separation distance between the rotating mixing assembly 4 and the mixing grid 2 can be designed according to the size of the rotational flow radius.

The rotary mixing assembly 4 comprises a guide shell 8, a mandrel 10 and a bracket 7 for supporting the mandrel 10 in the guide shell 8, wherein the mandrel 10 is sleeved with an impeller 9, and the impeller 9 is limited on the mandrel 10 through a positioning nut 11 and a locking back cap 12.

The impeller 9 comprises a sliding bearing seat 15 and spiral impeller blades 16 distributed along the radial direction of the outer circle of the sliding bearing seat 15, the number of the impeller blades 16 is 3-6, and the rotating direction can be left-handed rotation or right-handed rotation.

The inner cavity of the guide shell 8 sequentially comprises a contraction section 17, a cylindrical section 18 and a diffusion section 19 from one end to the other end along the oil flow direction, the cone angle of the contraction section 17 is 8-15 degrees, and the cone angle of the contraction section 17 is an included angle between the shell wall and the axis of the guide shell 8; the angle of the diffusion section 19 is 30-45 degrees, and the cone angle of the diffusion section 19 is the included angle between the cylinder wall and the axis of the guide cylinder 8.

The mixing grid 2 is composed of a plurality of mixing grid plates 13 which are intersected with each other, as shown in fig. 2, the mixing grid plates are formed by vertically intersecting a plurality of transverse grid plates and a plurality of vertical grid plates, of course, the mixing grid plates can also be intersected in other equivalent forms, each mixing grid plate 13 is also provided with at least one overflowing hole 14, and the number of the overflowing holes 14 can be two, three or even more, so that tens of labyrinth passages are formed in the mixing grid.

The working process of the embodiment is as follows: when the thin oil and thick oil mixed liquid enters the mixing device from bottom to top under the action of bottom layer pressure during operation, firstly, large thick oil is primarily divided into slender strips by the filter screen 5 and then enters the rotary mixing assembly 4, and the impeller 9 rapidly rotates and stirs under the impact action of oil flow to cut and crush the slender thick oil.

Meanwhile, the crushed mixed fluid forms spiral flow under the driving of the impeller 9, and the mixed fluid forms a large-angle impact mixing grid 2 by virtue of the spiral shearing force of the fluid. On one hand, thick oil particles in the mixed fluid are crushed again by the grid plate of the mixing grid 2 and the cutting edges on the edges of the overflowing holes; on the other hand, the mixed fluid generates a plurality of 'channel relative displacements' in the labyrinth channel in the mixing grid 2 to form 'division-displacement-overlap', and also generates a violent vortex in the cross section direction, so that a strong shearing force acts on the fluid to further divide and mix the fluid.

The thick oil thin mixing device is provided with a plurality of groups of rotary mixing assemblies 4 and mixing grids 2 along the mixed oil flow direction, the rotating directions of two adjacent groups of rotary mixing assemblies are opposite, when the mixed fluid passes through, an impeller 9 is pushed to rotate and stir, so that the mixed fluid rotates leftwards and rightwards occasionally to generate vortex and reverse vortex, the mixed fluid is changed from longitudinal flow to transverse flow and is changed into longitudinal flow again, the mixed fluid is dispersed while the direction is changed, and the mixed fluid advances in the forms of flow dividing, flow combining, vortex and turbulent flow, so that a good radial mixing effect is generated.

The thick oil thin mixing device gathers completely depending on the self kinetic energy of the mixed fluid in the mixing process, the dispersing and mixing force is soft and sufficient, the head loss is much smaller than that of the traditional plane type mixer, and the total flowing length is much shorter than that of the traditional plane type mixer. The influence on the pressure drop of oil is small, the energy consumption is reduced, and the failure rate of the oil pumping equipment is reduced.

The device is easy to disassemble and assemble, the original production process of the oil well is not required to be changed during use, and the device can be matched with tools such as a diluted check valve, a leather cup sealer and the like to be used in a self-blowing well and an oil production well, and does not influence positive and negative well flushing.

The above description is only a preferred embodiment of the present invention, and is not a limitation to the technical solution of the present invention, it should be noted that, further improvements and changes can be made by those skilled in the art on the premise of the technical solution of the present invention, and all such improvements and changes should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a viscous crude mixes thin mixing arrangement which characterized in that: including tubing coupling (1) and bearing cylinder (3), tubing coupling (1) is connected in the upper end of bearing cylinder (3), and the lower extreme of bearing cylinder (3) is provided with filter sieve (5), is provided with at least a set of rotatory mixed assembly (4) and at least a set of mixed bars (2) in bearing cylinder (3), mixes bars (2) and rotatory mixed assembly (4) and from last to down sets up at interval in proper order.

2. The thick oil diluting and mixing device according to claim 1, characterized in that: the bearing cylinder (3) comprises an upper group, a middle group and a lower group of rotary mixing assemblies (4) and three groups of mixing grids (2), wherein the rotary mixing assemblies in the middle group are opposite to the rotary directions of the other two groups.

3. The thick oil diluting and mixing device according to claim 1, characterized in that: and a group of mixing grids (2) is arranged at the outlet of the rotational flow radius at the upper part of each group of rotary mixing assemblies (4).

4. The thick oil diluting and mixing device according to claim 1, characterized in that: and a lining (6) is arranged between the rotary mixing assembly (4) and the mixing grid (2).

5. The thick oil diluting and mixing device according to claim 1, characterized in that: the rotary mixing assembly (4) comprises a guide shell (8), a mandrel (10) and a support (7) for supporting the mandrel (10) in the guide shell (8), wherein the mandrel (10) is sleeved with an impeller (9), and the impeller (9) is limited on the mandrel (10) through a positioning nut (11) and a locking back cap (12).

6. The thick oil diluting and mixing device according to claim 5, characterized in that: impeller (9) are including sliding bearing seat (15) and along spiral impeller blade (16) of sliding bearing seat (15) excircle radial distribution, and the quantity of impeller blade (16) is 3 ~ 6, and the rotation direction can be the levogyration, also can be dextrorotation.

7. The thick oil diluting and mixing device according to claim 5, characterized in that: the inner cavity of the guide shell (8) sequentially comprises a contraction section (17), a cylindrical section (18) and a diffusion section (19) from one end to the other end along the oil flow direction, the cone angle of the contraction section (17) is 8-15 degrees, and the angle of the diffusion section (19) is 30-45 degrees.

8. The thick oil diluting and mixing device according to claim 1, characterized in that: the mixing grid (2) is composed of a plurality of mixing grid plates which are mutually crossed, and overflowing holes are formed in the mixing grid plates.

9. The thick oil diluting and mixing device according to claim 1, characterized in that: tens of parallel holes are distributed on the filter screen (5), and the aperture is 5-12 mm.