CN211562540U

CN211562540U - Jet mixer for mixing fracturing fluid

Info

Publication number: CN211562540U
Application number: CN201922003331.1U
Authority: CN
Inventors: 席文献; 魏代锋; 张代明; 王玉军; 朱庆国; 张玲山; 宁金生; 谢朋旭; 王石磊
Original assignee: Shandong Kerui Machinery Manufacturing Co Ltd
Current assignee: Shandong Kerui Machinery Manufacturing Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-09-25
Anticipated expiration: 2029-11-19

Abstract

The utility model belongs to the technical field of petroleum and natural gas fracturing equipment, in particular to a jet mixer for mixing fracturing fluid; comprises a suction conduit, a swirl nozzle, a mixing cavity, a diffusion cone, a diffusion conduit, a cleaning pipeline, a feeding joint, a mixing-assisting cavity and the like; the suction guide pipe provides clear water for the jet nozzle to form high-energy rotating water flow and negative pressure, the flushing pipeline secondarily mixes part of mixed liquid with powder added at the feeding joint, compared with a traditional mixer, the specially-made jet nozzle can form more efficient rotating jet, and secondarily-mixed fracturing fluid has more uniform characteristics and thoroughly eliminates the water powder caking phenomenon; the utility model discloses can satisfy large-scale fracturing construction, high viscosity ratio just can lifting means efficiency by a wide margin, has reduced blender use risk, has reduced the cost of oil field fracturing operation.

Description

Jet mixer for mixing fracturing fluid

Technical Field

The utility model belongs to the technical field of oil, natural gas fracturing equipment, concretely relates to fracturing fluid mixes uses jet mixer thoughtlessly.

Background

In the production increasing technology of unconventional oil and gas fields, horizontal well pressurized fracture acidizing is one of the most effective measures for improving the recovery ratio of oil and gas wells at present. Based on domestic dispersed oil and gas distribution and aging of main oil production blocks, the fracturing operation at the present stage is gradually developed to large displacement and high pressure, and meanwhile, new fractured blocks are also more and more far away from urban base, the arrangement of fracturing well sites is more and more compact, and the environmental protection requirement is more and more strict.

In a conventional fracturing operation, the mixed liquid is often manually disposed from a base station and then transported to the site. However, the traditional mixing mode needs to occupy multiple experienced personnel for 24-hour shift configuration, long-time stirring is needed in the configuration process, and the configuration is completed and then the configuration needs to be transported to an operation site hundreds of meters away, so that the transportation cost is high, and the development of fracturing operation is restricted.

Therefore, it is imperative to develop a high-quality and high-efficiency fracturing fluid blending device under the working condition of large discharge operation, and chinese patent CN201420278635 provides a fracturing fluid blending device, which comprises: the premixing device comprises a body, a liquid inlet pipeline communicated with an inner cavity of the body, a feed inlet arranged at the top of the body and a connecting port arranged at the bottom of the body; the venturi ejector is arranged at the bottom of the premixing device, and the connecting port is connected with a side pipeline of the venturi ejector. The utility model provides a mixing device of fracturing fluid is among, through setting up premixing device and venturi sprayer, make the fracturing fluid mix twice and finally form, compare with the fracturing fluid that traditional once formed of mixing, the fracturing fluid that twice mix obtained is more even, the appearance probability of powder caking phenomenon has been reduced, the permeability of fracturing fluid has been strengthened, and the viscosity of fracturing fluid has also been improved, make the fracturing treatment effect of oil, gas well better, the cost of oil gas well development has also been reduced simultaneously. But it still can appear mixing inhomogeneous in the configuration process, and the powder siltation often can appear in the mixing chamber moreover, leads to the pipeline to block up when serious, and liquid overflows from the feed inlet, and then makes the whole inefficacy of device.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an invention aim at overcome the shortcoming that prior art exists, propose design fracturing fluid and thoughtlessly join in marriage and use jet mixer to solve the pipeline siltation under the big discharge capacity operating mode, join in marriage that the liquid degree of consistency is poor, viscosity is low, is difficult to high efficiency, high-quality fracturing fluid preparation problem.

The utility model relates to a jet mixer for mixing fracturing fluid, which comprises a main structure comprising a suction conduit, a swirl nozzle, a mixing cavity, a diffusion conduit, a flushing pipeline and a mixing assisting cavity; the swirl nozzle is connected with the suction conduit and is arranged at the inlet end of the mixing cavity; the outlet end of the mixing cavity is connected with the diffusion conduit, and the upper part of the mixing cavity is connected with the mixing-assisting cavity; the diffusion conduit is connected with the flushing pipeline; the flushing pipeline is connected with the mixing assisting cavity sequentially through the throttling pipe fitting and the ball valve, a feeding connector is arranged at the top of the mixing assisting cavity, and the flushing pipeline guides flushing water flow and powder fed by the feeding connector to be mixed in the mixing assisting cavity.

Preferably, the swirl nozzle is a Venturi nozzle, and swirl holes are additionally arranged on the periphery of the swirl nozzle; the rotary jet holes deflect by 10-40 degrees along the axis to form spiral rotary water flow along the axis direction, and the central direct jet water flow is favorably mixed with the powder.

Preferably, the swirl nozzle is close to the periphery of the inner wall of the mixing cavity body and is additionally provided with jet holes along the horizontal direction of the axis to form annular water flow, so that siltation of the mixing cavity body is cleared.

Preferably, a diffusion cone is arranged in the diffusion conduit, the diffusion cone is connected with the outlet end of the mixing cavity, the convergence angle of one end, close to the swirl nozzle, of the diffusion cone, namely the included angle between the side surface of the diffusion cone and the central axis of the diffusion cone is 10-40 degrees, and is adaptive to the swirl nozzle swirl water flow angle, so that water flow is effectively converged in a throat in the middle, and energy loss is reduced.

Compared with the prior art, the utility model, have following advantage: the utility model arranges the Venturi nozzle at the inlet end of the mixing cavity, adds the rotary spraying holes with certain angles around the Venturi nozzle, can effectively generate water flow which is spiral along the axis of the nozzle, and assists the main spraying hole to form Venturi tube effect, more efficiently mixes the powder material added from the feed inlet, and improves the powder carrying efficiency; the annular spray holes at the edge of the nozzle can form jet flow with certain energy to impact deposited powder at the bottom of the mixing cavity, so that the risk of pipeline blockage is effectively reduced; the flushing pipeline arranged at the tail part of the diffusion pipeline can guide partial water flow to the mixing assisting cavity, so that the powder can be more efficiently dissolved in water, and further can be efficiently mixed with high-energy water flow at the bottom of the mixer, the fisheye phenomenon is thoroughly solved, and the mixing quality is greatly improved; the optimized throttling pipeline can limit the overflowing water quantity through the central aperture, so that the phenomenon that the excessive water quantity causes the overflow of water flow from the feed inlet to influence the mixing operation is avoided; the ball valve is used as a pipeline cut-off valve, so that the service life of the pipeline is prolonged, and the stable flow characteristic of the pipeline is ensured; the utility model discloses can satisfy large-scale fracturing construction, high viscosity ratio just can lifting means efficiency by a wide margin, has reduced blender use risk, has reduced the cost of oil field fracturing operation.

Drawings

Fig. 1 is a top view of the present invention;

3 FIG. 3 2 3 is 3 a 3 front 3 sectional 3 view 3 of 3 the 3 utility 3 model 3 from 3 A 3 to 3 A 3; 3

FIG. 3 is an enlarged view of the main view structure of the swirler of the present invention;

FIG. 4 is a right-view structural enlarged view of the swirl nozzle of the present invention

Wherein, 1 suction conduit, 2 swirl nozzles, 3 sealing rings, 4 mixing cavities and 5 diffusion cones; 6 diffusion catheters, 7 flushing pipelines, 8 clamp groove short joints, 9 throttling pipe fittings, 10 ball valves, 11 transition pipe fittings, 12 connecting pipe fittings, 13 feeding joints, 14 mixing-assisting cavities, 15 rotary spray holes and 16 spray holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Example 1:

the jet flow mixer for mixing the fracturing fluid comprises a main structure of a suction guide pipe 1, a swirl nozzle 2, a mixing cavity 4, a diffusion guide pipe 6, a flushing pipeline 7 and a mixing assisting cavity 14; the swirl nozzle 2 is connected with the suction conduit 1 and is arranged at the inlet end of the mixing cavity 4; the outlet end of the mixing cavity 4 is connected with the diffusion conduit 6, and the upper part of the mixing cavity 4 is connected with the mixing-assisting cavity 14; the diffusion conduit 6 is connected with a flushing pipeline 7; the flushing pipeline 7 is connected with the mixing-assisting cavity 14 sequentially through the throttling pipe 9 and the ball valve 10, the top of the mixing-assisting cavity 14 is provided with the feeding connector 13, and the flushing pipeline 7 guides flushing water flow to be mixed with powder fed by the feeding connector 13 in the mixing-assisting cavity 14.

Preferably, the swirl nozzle 2 is a venturi nozzle, and swirl holes 15 are additionally arranged on the periphery of the swirl nozzle; the rotary jet holes 15 deflect by 10-40 degrees along the axis to form spiral rotary water flow along the axis direction, so that the central direct jet water flow is favorably mixed with the powder.

Preferably, the swirl nozzle 2 is additionally provided with jet holes 16 along the horizontal direction of the axis near the circumference of the inner wall of the mixing cavity 4 to form annular water flow, which is helpful for removing siltation from the mixing cavity 4.

Preferably, a diffusion cone 5 is arranged in the diffusion conduit 6, the diffusion cone 5 is connected with the outlet end of the mixing cavity 4, the convergence angle of one end of the diffusion cone 5 close to the swirl nozzle 2, namely the included angle between the side surface of the diffusion cone 5 and the central axis of the diffusion cone 5 is 10-40 degrees, and is adapted to the swirl nozzle 2 swirl water flow angle, so that water flow is effectively converged in a throat in the middle position, and energy loss is reduced.

Preferably, a sealing ring is arranged between the swirl nozzle 2 and the suction conduit 1 to prevent water leakage; the flushing pipe fitting 7 and the throttling pipe fitting 9 are connected through a clamp groove short joint 8; the ball valve 10 and the connecting pipe 12 are connected by a transition pipe 11.

In the embodiment, the suction conduit 1 provides clean water for the swirl nozzle 2 to form high-energy rotating water flow and negative pressure, the flushing pipeline 7 carries out secondary mixing on part of mixed liquid and powder added at the feeding connector 13, compared with a traditional mixer, a specially-made jet nozzle can form more efficient rotating jet flow, and the secondarily-mixed fracturing fluid has more uniform characteristics and thoroughly eliminates the phenomenon of water powder agglomeration.

The jet flow mixer for mixing the fracturing fluid in the embodiment comprises the following steps of:

s1, the suction catheter 1 supplies clear water containing certain energy to the swirl nozzle 2, the flow velocity of water is changed after the water flows through the swirl nozzle, the flow energy of the water is increased, further vacuum attraction is formed at the periphery of the spray hole, powder is adsorbed to be melted in the water flow, and the added swirl nozzle 15 can promote the powder to be further dissolved and can be fully mixed based on the characteristic that the guar gum powder is dissolved when meeting water;

s2, opening a ball valve of a flushing pipeline 7, and after part of water flow passes through the flushing pipeline 7 and is limited by a throttling pipe fitting 9, distributing the passing water flow and the water flow of the diffusion guide pipe 6 according to a certain proportion, wherein the part of water flow can clean the mixing-assisting cavity 14 and is helpful for powder fusion at the feed inlet and the water flow of the mixing-assisting cavity 14;

s3: after the jet mixer operates stably, powder is added from the feeding connector 13, the powder falls under the action of gravity of the powder and the action of vacuum suction of main jet water flow in the falling process, and the powder can be efficiently and quickly mixed into the water flow with high quality under the action of the water flow of the flushing pipeline 7.

The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a fracturing fluid mixes uses jet mixer which characterized in that: the main body structure comprises a suction conduit (1), a swirl nozzle (2), a mixing cavity (4), a diffusion conduit (6), a flushing pipeline (7) and a mixing-assisting cavity (14); the swirl nozzle (2) is connected with the suction conduit (1) and is arranged at the inlet end of the mixing cavity (4); the outlet end of the mixing cavity (4) is connected with the diffusion conduit (6), and the upper part of the mixing cavity (4) is connected with the mixing-assisting cavity (14); the diffusion conduit (6) is connected with the flushing pipeline (7); the flushing pipeline (7) is connected with the mixing-assisting cavity (14) sequentially through a throttling pipe (9) and a ball valve (10), and a feeding joint (13) is arranged at the top of the mixing-assisting cavity (14).

2. The jet mixer for compounding a fracturing fluid of claim 1, wherein: the swirl nozzle (2) is a Venturi nozzle, and swirl holes (15) are additionally arranged on the periphery of the swirl nozzle.

3. The jet mixer for compounding a fracturing fluid of claim 2, wherein: the rotary jet holes (15) deflect by 10-40 degrees along the axis.

4. The jet mixer for compounding a fracturing fluid of claim 1, wherein: and the periphery of the swirl nozzle (2) close to the inner wall of the mixing cavity (4) is additionally provided with jet holes (16) along the horizontal direction of the axis.

5. The jet mixer for compounding a fracturing fluid of claim 1, wherein: the diffusion cone (5) is arranged in the diffusion guide pipe (6), the diffusion cone (5) is connected with the outlet end of the mixing cavity (4), and the convergence angle of one end, close to the swirl nozzle (2), of the diffusion cone (5), namely the included angle between the side face of the diffusion cone (5) and the central axis of the diffusion cone (5) is 10-40 degrees.