CN105170006A - Working fluid mixing device - Google Patents

Abstract

The invention provides a working solution mixing device which comprises a powder adding system, a mixing system and a mixing system, wherein the powder adding system comprises a powder storage tank and a feeding mechanism, and the powder storage tank is connected with the feeding mechanism; the liquid material adding system comprises a clean water pump and a liquid adding pump; the tank prying type mixing tank is internally provided with a mixer and a stirrer, and the mixer is connected with the stirrer; the automatic powder spraying device is characterized by further comprising a mixing nozzle connected with the mixer, the feeding mechanism is connected with the mixing nozzle, the clean water pump is connected with the mixing nozzle, the liquid adding pump is connected with the stirrer, and the water inlet direction of the mixing nozzle is crossed with the powder spraying direction of the mixing nozzle. The device has the advantages that the liquid distribution station construction and liquid transportation are omitted, the on-site liquid distribution is realized, the fracturing construction operation period is effectively shortened, the problem of liquid deterioration does not exist when the device is continuously used for distributing, the waste of liquid is reduced, and the damage to the stratum is reduced.

Description

Working fluid mixing device

technical field

The invention relates to the field of oil exploitation, in particular to a working fluid mixing device.

Background technique

At present, the traditional liquid dosing method is to add water, thickener and additives according to the proportion of the working liquid formula in a fixed liquid dosing station, and stir and circulate through the liquid pump to fully swell the working liquid so that the viscosity meets the design requirements. This process has a cumbersome liquid preparation process in large-scale fracturing construction, and during the fracturing process, due to uncertain factors on the construction site (such as abnormally high pressure in the formation, sensitive damage in the formation, and instability of the well wall), it may cause liquid Too much waste and low construction efficiency.

For large-scale fracturing construction, the traditional liquid dosing method can no longer meet the needs of large-scale fracturing construction, there are uncertain factors, and a margin must be left when dosing the liquid; in addition, the liquid dosing process of the traditional process is not continuous, and it needs After being transported to the well site for a long distance, a part of the liquid deteriorates due to aging.

Contents of the invention

The purpose of the present invention is to provide a working fluid mixing device to solve the technical problem that the quality of the working fluid cannot be guaranteed due to the long-distance transportation of the fixed liquid dispensing station.

Above-mentioned purpose of the present invention can adopt following technical scheme to realize:

The invention provides a working liquid mixing device, which includes a powder adding system, including a powder storage tank and a feeding mechanism, and the powder storage tank is connected with the feeding mechanism; a liquid material adding system, including a clear water pump and a liquid adding pump; a tank skid type mixing The tank, the skid type mixing tank is equipped with a mixer and agitator, the mixer is connected to the agitator; it also includes a mixing nozzle connected to the mixer, the feeding mechanism is connected to the mixing nozzle, the clean water pump is connected to the mixing nozzle, and the liquid adding pump It is connected with the agitator, and the water inlet direction of the mixing nozzle is set crosswise with the powder spraying direction of the mixing nozzle.

Further, the mixing nozzle includes a nozzle body and a powder spraying pipe movably arranged in the nozzle body, the powder spraying pipe is provided with a conical powder spraying head, the nozzle body is provided with a water inlet, and the water inlet direction of the water inlet faces the conical The conical surface of the powder spraying head; the nozzle body and the tube wall of the powder spraying tube form an adjustment cavity, and the tube wall of the powder spraying tube to close the adjustment cavity is provided with an adjustment boss; the nozzle body is provided with a mixing nozzle outlet, mixing The outlet of the nozzle is connected with the mixer, and the conical powder spray head is set opposite to the outlet of the mixing nozzle.

Further, the working fluid mixing device also includes a pressure regulating device, and the regulating cavity is connected to the pressure regulating device.

Further, an electronic scale is arranged on the powder storage tank.

Further, a flow meter is provided at the outlet of the clean water pump and the outlet of the liquid addition pump.

Further, there is at least one clean water pump and liquid addition pump.

Further, a liquid level gauge is arranged on the tank skid mixing tank.

Further, the liquid material adding system also includes a discharge pump, which is connected with the agitator.

Further, a flow meter is arranged at the outlet of the discharge pump.

Further, the feeding mechanism is a screw feeding mechanism.

Features and advantages of the present invention are:

Eliminates the construction of liquid distribution stations and liquid transportation, realizes ready-to-use, effectively shortens the fracturing construction cycle, and uses the device for continuous mixing without the problem of liquid deterioration, reducing the waste of liquid and reducing the impact on the formation s damage.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the schematic diagram of working fluid mixing device of the present invention; And

Fig. 2 is a schematic diagram of the mixing nozzle of the working fluid mixing device of the present invention.

The reference signs in the accompanying drawings are as follows: 11, powder storage tank; 111, electronic scale; 12, feeding mechanism; 21, clean water pump; 22, liquid filling pump; 23, discharge pump; 24, flow meter; 30, tank skid Type mixing tank; 31, mixer; 32, agitator; 33, liquid level gauge; 34, pressure regulator; 35, mixing nozzle; 351, nozzle body; 352, powder spray tube; 353, conical powder spray head; 354, water inlet; 355, regulating cavity; 356, regulating boss; 357, connection hole; 358, mixing nozzle outlet; 41, diesel engine; 42, hydraulic pump; 43, hydraulic motor.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1 and 2, the present invention provides a working liquid mixing device, including a powder addition system, including a powder storage tank 11 and a feeding mechanism 12, and the powder storage tank 11 is connected to the feeding mechanism 12; the liquid material addition system , including clean water pump 21 and liquid adding pump 22; tank skid type mixing tank 30, tank skid type mixing tank 30 is provided with mixer 31 and agitator 32, mixer 31 and agitator 32 are connected; also includes and mixer 31 The connected mixing nozzle 35, the feeding mechanism 12 is connected with the mixing nozzle 35, the clean water pump 21 is connected with the mixing nozzle 35, the liquid addition pump 22 is connected with the agitator 32, the water inlet direction of the mixing nozzle 35 is intersected with the powder spraying direction of the mixing nozzle 35 set up.

Specifically, the working fluid mixing device is composed of a power system, a powder material addition system, a liquid material addition system and a tank skid mixing tank 30 . Among them, the power system is used to provide power for other systems. The powder addition system is used to deliver the powder required for liquid preparation; the liquid addition system is used to deliver various liquids (including water and additives, etc.) required for liquid preparation. The tank skid type mixing tank 30 uniformly mixes various raw materials together to prepare the working fluid required for construction.

The power system includes a diesel engine 41, a hydraulic pump 42 and a hydraulic motor 43. The power system is respectively connected to the clean water pump 21, the liquid filling pump 22, the discharge pump 23 and the feeding mechanism 12. After the diesel engine 41 is ignited, it outputs power to start the hydraulic pump 42. The hydraulic pump 42 outputs the power to the hydraulic motor 43, and transmits the power to the required place in the working fluid mixing device, such as the agitator 32.

The powder adding system includes a powder storage tank 11 and a feeding mechanism 12, and the powder storage tank 11 is used for storing necessary powder materials during liquid preparation. The feeding mechanism 12 is arranged under the powder storage tank 11, and the feeding mechanism 12 is a screw feeding mechanism, which ensures that the powder flow rate enters the mixing nozzle 35 stably. The feeding mechanism 12 is started after being powered by the hydraulic motor 43, and the powder is transported to the tank skid mixing tank 30 as required. The powder storage tank 11 is provided with an electronic scale 111. The electronic scale 111 is used to weigh the powder delivered by the feeding mechanism 12. The electronic scale 111 is used to cooperate with the screw feeding mechanism 12 to feed the powder to measure the weight of the powder and dynamically control the output of the powder. Quantity, changed the low-precision method of feeding according to the total amount, realized continuous and uniform feeding, and the feeding accuracy reached ±1%.

The liquid material addition system comprises a clean water pump 21, a liquid addition pump 22 and a discharge pump 23, the clean water pump 21 and the liquid addition pump 22 are both input pumps, and the discharge pump 23 is an output pump. The clean water pump 21 is used to deliver clear water needed for liquid preparation to the tank-skid mixing tank 30 , and the liquid addition pump 22 is used for delivering various liquid additives required for liquid mixing to the tank-skid type mixing tank 30 . The function of the discharge pump 23 is to discharge the prepared working fluid out of the system. Clear water pump 21, liquid add pump 22 and discharge pump 23 are all at least one, a plurality of clear water pumps 21 can be connected with a plurality of mixing nozzles 35 to carry out water injection operation simultaneously; An additive is injected into the agitator 32 through a liquid addition pump 22 and its pipeline, and the purpose of mixing the working fluid is achieved through sufficient agitation. The discharge pump 23 is connected with the agitator 32 , and the discharge pump 23 discharges the required working fluid from the tank skid mixing tank 30 . At the same time, a flow meter 24 is installed at the outlet of the clean water pump 21 and the outlet of the liquid adding pump 22, and a flow meter 24 is also installed at the outlet of the discharge pump 23, so that the mixing and discharging of the working fluid can be precisely controlled.

As shown in FIGS. 1 and 2 , the tank skid mixing tank 30 is composed of a mixer 31 , an agitator 32 , a liquid level gauge 33 , a pressure regulating device 34 and a mixing nozzle 35 . The tank body of the skid-type mixing tank 30 is a three-stage structure, and the first stage mixer 31 is connected with the clean water pump 21, the feeding mechanism 12 and the mixing nozzle 35, and is used for preparing a mixed solution of clean water and powder. The second-stage agitator 32 is connected with the liquid addition pump 22, and various additives are added to the agitator 32 for preparing working fluid. In order to improve the mixing quality, a stirrer 32 can also be installed in the first section to mix and stir different raw materials evenly. The third section connects the discharge pump 23 and the liquid level gauge 33 for storing the prepared working fluid. The liquid level gauge 33 is used to read the liquid level of the working fluid and control the preparation amount of the working fluid.

As shown in Figure 2, the mixing nozzle 35 includes a nozzle body 351 and a powder spraying pipe 352 which is movably arranged in the nozzle body 351. Nozzle 354, nozzle body 351 and the tube wall of powder spraying pipe 352 form an adjusting cavity 355, and the tube wall of powder spraying tube 352 is closed and adjusting cavity 355 is provided with an adjusting boss 356; the working fluid mixing device also includes a pressure regulating In the device 34 , the regulating cavity 355 is connected to the pressure regulating device 34 , and the nozzle body 351 is also provided with a connecting hole 357 , and the regulating cavity 355 is connected to the pressure regulating device 34 through the connecting hole 357 . The water inlet pipeline of the water inlet 354 is perpendicular to the axis of the powder spraying pipe 352, so that the water inlet direction and the powder spraying direction intersect at 90 degrees. The nozzle body 351 is provided with a mixing nozzle outlet 358, the mixing nozzle outlet 358 is connected to the mixer 31, and the conical powder spraying head 353 is arranged opposite to the mixing nozzle outlet 358, and sprays out between the conical powder spraying head 353 and the nozzle body 351. The water is sprayed out along the gap between the conical powder spraying head 353 and the nozzle body 351, and injected into the mixer 31 through the mixing nozzle outlet 358 together with the powder sprayed from the conical powder spraying head 353 for thorough mixing.

The effect of the mixing nozzle 35 is to fully mix the clear water and the powder to avoid the phenomenon of "powder in water". The mixing nozzle 35 can maintain the constant working pressure of the incoming clear water through the set pressure regulating device 34 . The water flow of the water inlet 354 acts on the conical surface of the conical powder spray head 353. When the water pressure of the clear water increases, the powder spray pipe 352 slides to the right under the effect of the water pressure (as shown in Figure 2), so that The water flow channel between the conical powder spray head 353 and the nozzle body 351 becomes larger, thereby reducing the pressure of the sprayed water flow. During the sliding process, the adjustment boss 356 enters the adjustment cavity 355, and the adjustment cavity 355 is compressed, and the inside The gas enters the pressure regulating device 34 through the connecting hole 357, and acts on the medium inside the pressure regulating device 34 to maintain the dynamic stability of the water flow channel between the conical powder spray head 353 and the nozzle body 351; The pressure liquid on the conical surface of the powder spraying head 353 is reduced, and the dynamic balance with the pressure regulating device 34 cannot be maintained. The medium in the pressure regulating device 34 will release energy and enter the regulating cavity 355 through the connecting hole 357, and then Acting on the adjusting boss 356, it will push the powder spraying tube 352 to move to the left (as shown in Figure 2), so that the water flow channel between the conical powder spraying head 353 and the nozzle body 351 becomes smaller, thereby increasing the sprayed water flow The pressure ensures a dynamic and stable spray pressure. That is, when the flow rate of injected clean water changes, the working pressure of clean water will always maintain the set value to ensure the impact of high pressure on the powder during mixing, achieve a good mixing effect, and completely eliminate the phenomenon of "powder in water".

The working liquid mixing device of the present invention can carry out the mixing operation near the construction site by using the tank skid type mixing tank 30, which saves the construction of a liquid distribution station and liquid transportation, and realizes ready-to-use and ready-to-use. In the ordinary mixing process, in order to delay the aging and deterioration of the liquid during transportation, it is necessary to add a preservative that is harmful to the formation in the liquid. The present invention can realize continuous liquid preparation and ready-to-use, reducing the damage to the formation.

The working fluid mixing process of the present invention is as follows: start the power system, and start the mixing operation after each part is fully prepared. The order of mixing is to first deliver the clean water delivered by the clean water pump 21 and the powder delivered by the feeding mechanism 12 After entering the mixer 31 after the mixing nozzle 35, the mixture is mixed under the action of the mixer 31 to form a mixed solution, then the mixed solution enters the agitator 32, and then the liquid additive delivered by the liquid addition pump 22 is added to the mixed solution, After sufficient stirring, the qualified working fluid is obtained, and the mixing work is completed, and the working fluid is discharged through the discharge pump 23 when necessary.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

Eliminates the construction of liquid distribution stations and liquid transportation, realizes ready-to-use, effectively shortens the fracturing construction cycle, and uses the device for continuous mixing without the problem of liquid deterioration, reducing the waste of liquid and reducing the impact on the formation damage; continuous mixing solves the problem of easy powder-in-water in the process of dosing, and improves the quality of dosing.

The above are only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims (10)

1. A working fluid mixing device, characterized in that, comprising A powder addition system comprising a powder storage tank (11) and a feeding mechanism (12), the powder storage tank (11) being connected to the feeding mechanism (12); The liquid material addition system includes a clean water pump (21) and a liquid addition pump (22); Tank skid type mixing tank (30), described tank skid type mixing tank (30) is provided with mixer (31) and agitator (32), and described mixer (31) is connected with described agitator (32) ; Also include a mixing nozzle (35) connected to the mixer (31), the feeding mechanism (12) is connected to the mixing nozzle (35), the clear water pump (21) is connected to the mixing nozzle (35) ), the liquid addition pump (22) is connected to the agitator (32), and the water inlet direction of the mixing nozzle (35) is intersected with the powder spraying direction of the mixing nozzle (35). 2. The working fluid mixing device according to claim 1, characterized in that, the mixing nozzle (35) comprises a nozzle body (351) and a powder spray tube movably arranged in the nozzle body (351) (352), the powder spray pipe (352) is provided with a conical powder spray head (353), the nozzle body (351) is provided with a water inlet (354), and the water inlet of the water inlet (354) direction towards the tapered face of the tapered powder spray head (353); The nozzle body (351) and the tube wall of the powder spraying tube (352) encircle an adjustment cavity (355), and the tube wall of the powder injection tube (352) closes the adjustment cavity (355). There is an adjusting boss (356); The nozzle body (351) is provided with a mixing nozzle outlet (358), the mixing nozzle outlet (358) is connected to the mixer (31), and the conical powder spray head (353) is connected to the mixing nozzle Outlets (358) are set relatively. 3. The working fluid mixing device according to claim 2, characterized in that it further comprises a pressure regulating device (34), and the regulating cavity (355) is connected to the pressure regulating device (34). 4. The working fluid mixing device according to claim 1, characterized in that an electronic scale (111) is arranged on the powder storage tank (11). 5. The working fluid mixing device according to claim 1, characterized in that a flow meter (24) is provided at the outlet of the clean water pump (21) and the outlet of the liquid adding pump (22). 6. The working fluid mixing device according to claim 1, characterized in that there is at least one of the clean water pump (21) and the liquid addition pump (22). 7. The working fluid mixing device according to claim 1, characterized in that a liquid level gauge (33) is arranged on the skid type mixing tank (30). 8. The working fluid mixing device according to claim 1, characterized in that, the liquid material adding system further comprises a discharge pump (23), and the discharge pump (23) is connected to the agitator (32). 9. The working fluid mixing device according to claim 8, characterized in that a flow meter (24) is arranged at the outlet of the discharge pump (23). 10. The working fluid mixing device according to claim 1, characterized in that, the feeding mechanism (12) is a screw feeding mechanism.