CN103100318A - Accelerated polymer swollen particle dissolution device with instant dissolving loop and cleaning tank - Google Patents

Abstract

The invention discloses a device for accelerating the dissolution of polymer swelling particles with a quick-dissolving ring and a cleaning tank. The upper part of the stretching unit is the cleaner fixed on the transmission shaft, and the lower part of the cleaner is the upper fixed gear, the movable gear and the lower fixed gear with several through holes. The upper fixed toothed plate, the movable toothed plate, and the lower fixed toothed plate are all connected by several groups of concentric ring gears with unequal diameters. The surfaces of the upper fixed toothed plate, the lower fixed toothed plate and the movable toothed plate are A number of trapezoidal grooves are respectively provided. The upper fixed tooth disc and the lower fixed tooth disc are provided with a number of water seepage channels connected with a number of nozzles on the short tooth structure. The water seepage channels are connected with the external water pipes. Liquid inlet and liquid outlet. The invention has the advantages of simple installation, small footprint, light weight, large processing capacity and accelerated polymer dissolution.

Description

An accelerated polymer swelling granule dissolution device with a quick-dissolving ring and a cleaning tank

technical field

The invention provides a forced stretching instant dissolving device for accelerating partial hydrolysis of polyacrylamide polymers, in particular to an accelerated polymer swelling particle dissolving device with an instant dissolving ring and a cleaning tank.

Background technique

Polymer flooding, as one of the important methods to enhance oil recovery in oilfield development, has been widely used in onshore oilfields at home and abroad. Due to the lack of fresh water resources in offshore oilfields, the injected water has high salinity and high content of calcium and magnesium ions. Traditional partially hydrolyzed polyacrylamide has insufficient salt resistance and low viscosity, which is far from meeting the requirements of offshore oil fields. Due to the small number of hydrophobic groups on the main chain of the hydrophobic association polymer, the solution has the characteristics of a reversible three-dimensional network structure, good shear thinning and injectability, strong shear resistance, good salt resistance, and high viscosity. Water with high salinity and high calcium and magnesium ion content has high viscosity, which is suitable for application in offshore oil fields that lack fresh water resources; for oil reservoirs with high formation permeability and high crude oil viscosity, hydrophobic association polymers have more prominent advantages. Hydrophobic association polymers usually take a long time to stir and mature at room temperature (20°C-25°C), which greatly restricts their application in offshore oil fields. Therefore, according to the field practice of offshore oilfields, the research on accelerating the dissolution rate of hydrophobically associated polymers is of great significance to the enhanced oil recovery technology based on polymers in offshore oilfields.

At present, research work on the solubility of hydrophobically associated polymers has been carried out. The dissolution time of hydrophobically associated polymers under the existing methods is more than 120 minutes, which means that there must be a large volume and number of aging tanks to ensure that the polymers For offshore platforms with limited space and load-bearing capacity, especially the existing small platforms, it is almost impossible to carry out polymer flooding.

Southwest Petroleum University enhanced oil recovery laboratory online instant research group, by setting screens or orifices of different apertures with appropriate spacing inside the pipeline, peeling and cutting the swollen particles, reducing the particle size of the swollen particles, shortening the dissolution time, and verified the feasibility of this idea. In 2006, the on-site scale-up test was carried out, and the AP-P4 swollen particles were peeled off and cut several times in a circular manner. As a result, the dissolution time of AP-P4 was greatly shortened. However, due to repeated cutting of polymer molecular chains, the chains are broken and the viscosity of the solution is reduced; at the same time, the swollen particles block the screen or the orifice plate, which cannot meet the requirements for polymer dispensing on offshore platforms. Therefore, there is an urgent need for a hydrophobic association polymer instant dissolving device with simple structure and convenient operation, which can accelerate the dissolution rate of the hydrophobic association polymer, shorten the dissolution time, and its solution performance meet the requirements of field application.

Contents of the invention

The purpose of the present invention is to provide a bipolar forced stretching polymer swelling particle accelerated dissolution device, which can accelerate the dissolution of polymer particles more efficiently.

For reaching this purpose, the present invention adopts following technical scheme:

An accelerated polymer swelling particle dissolution device with an instant ring and a cleaning tank is characterized in that the device is composed of a cleaner, a stretching unit and a liquid storage chamber, and the stretching unit is composed of an upper fixed tooth plate, a movable tooth plate, and a lower fixed tooth The upper part of the stretching unit is a cleaner fixed on the transmission shaft. The cleaner is composed of a plurality of impellers. The lower part of the cleaner is an upper fixed toothed disc with several through holes, The movable toothed plate, the lower fixed toothed plate, the upper fixed toothed plate, the movable toothed plate, and the lower fixed toothed plate are all connected by several groups of concentric circular rings with unequal diameters. The concentric circular rings of the movable toothed plate and the upper fixed toothed The concentric circular gear rings of the fixed toothed disc and the lower fixed toothed disc are uniformly meshed, and the surfaces of the upper fixed toothed disc, the lower fixed toothed disc and the moving toothed disc are respectively provided with several trapezoidal grooves, and the upper fixed toothed disc and the lower fixed toothed disc There are several water seepage passages connected with several nozzles on the short tooth structure inside, the water seepage passages are connected with the external water pipes, the upper fixed tooth plate and the lower fixed tooth plate are fixed on the liquid storage chamber, and the movable tooth plate is fixed on the transmission On the shaft, the transmission shaft is connected to the pulley through the bearing seat and the liquid storage chamber, the bearing seat is fixed on the liquid storage chamber, the stretching unit is located in the liquid storage chamber, the upper part of the liquid storage chamber is provided with a liquid inlet, and the lower part is provided with a liquid outlet.

Preferably, the cleaner is a cross-shaped impeller with 4 blades, and the blades of the cleaner impeller are perpendicular to the upper fixed toothed disc, and this design can better clean the polymer swelling particles adhering to the fixed toothed disc .

Preferably, the base angle of the front end of the trapezoidal groove in the direction of rotation of the moving chainring is an obtuse angle, and the base angle of the rear end is an acute angle. Preferably, the bottom angle of the front end is 75°, and the bottom angle of the rear end is 25°.

Preferably, the trapezoidal grooves are evenly distributed on the meshing surfaces of the upper fixed toothed plate and the lower fixed toothed plate and the movable toothed plate, and there are 132 trapezoidal grooves in total.

Preferably, the concentric ring gears of the upper fixed gear, lower fixed gear and moving gear have a tooth height of 3-5 cm. The design of this length range can reduce the difficulty of design and processing, and the surface of the gear ring is designed with a circular arc transition.

Preferably, the surface of the concentric ring gear of the movable toothed disc has twill lines with a pitch of 5 mm and a depth of 1 mm. The twill lines and the rotation direction of the mobile toothed plate present a certain angle of 15°.

Preferably, the upper part of the concentric circular rings of the movable toothed plate and the lower fixed toothed plate is trapezoidal, and the meshing distance between the upper fixed toothed plate and the movable toothed plate, and between the movable toothed plate and the lower fixed toothed plate gradually decreases from the upper part to the lower part.

Preferably, a mechanical seal is provided between the lower part of the transmission shaft and the bearing seat, and a centralizer is provided outside the mechanical seal, which is fixed on the bearing seat. The mechanical seal prevents the solution in the liquid storage chamber from entering the drive shaft to corrode the drive shaft, and the centralizer prevents the drive shaft from shaking and shifting.

Preferably, the liquid storage chamber is composed of an upper cover and a housing, the upper cover and the housing are connected and sealed by connecting bolts, the liquid inlet is provided at the upper part of the upper cover, and the liquid outlet is provided at the lower part of the housing.

Preferably, the transmission shaft is connected to the external upper motor through the bearing seat and the liquid storage chamber, and the motor is placed on the top and directly drives the transmission shaft, which can save space, simplify equipment, facilitate installation, and reduce the corrosion of the transmission shaft by liquid .

The beneficial effects of the present invention are: the device can be used to obtain a uniform hydrophobic association polymer solution in a short time, which can be used in the polymer flooding technology under the condition of high salinity, so that the oil recovery rate can be improved, And it also has the advantages of large processing capacity, light weight, small footprint, and simple installation. When there are large particles of polymer swelling particles on the fixed tooth plate, it can be cleaned.

Description of drawings

Fig. 1 is the structural representation of the accelerated polymer swelling particle dissolving device of this band instant ring and cleaning tank;

Fig. 2 is the trapezoidal groove schematic diagram that this accelerated polymer swelling particle dissolving device with quick-dissolving ring and cleaning groove is located on the lower fixed tooth disc;

Fig. 3 is the schematic diagram of water permeation of the lower fixed tooth plate of the accelerated polymer swelling particle dissolution device with instant ring and cleaning tank;

Fig. 4 is the top view of the movable tooth plate of the accelerated polymer swelling particle dissolving device with instant ring and cleaning tank;

Fig. 5 is the enlarged sectional view of the short tooth structure of the upper fixed toothed disc, the movable toothed disc, and the lower fixed toothed disc of the accelerated polymer swelling particle dissolution device with an instant ring and a cleaning tank;

Fig. 6 is the top view of the cleaner of the accelerated polymer swelling particle dissolving device of this band instant ring and cleaning tank;

Fig. 7 is a schematic diagram of another improvement of the accelerated polymer swelling particle dissolution device with a quick-dissolving ring and a cleaning tank.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

It is known from Fig. 1 to Fig. 7 that the accelerated polymer swelling particle dissolving device with an instant ring and a cleaning tank is composed of a cleaner 19, a stretching unit and a liquid storage chamber 1, and the stretching unit is composed of an upper fixed toothed disc 3, a moving The gear plate 4, the lower fixed gear plate 5, the transmission shaft 6, and the bearing seat 7 are composed. The upper part of the stretching unit is a cleaner 19 fixed on the transmission shaft 6. The cleaner 19 is composed of a plurality of impellers. The lower part of the cleaner 19 is The upper fixed toothed disc 3, the movable toothed disc 4, and the lower fixed toothed disc 5 all have a plurality of through holes 2 in turn. The concentric circular gear rings are connected. The concentric circular gear rings of the movable gear plate 4 are evenly engaged with the concentric circular gear rings of the upper fixed gear plate 3 and the lower fixed gear plate 5. The upper fixed gear plate 3 and the lower fixed gear plate 5 Several trapezoidal grooves 24 are respectively provided on the surface that engages with the movable tooth plate 4, and several water seepage passages 22 and several nozzles 23 on the structure of the short teeth 8 are provided inside the upper fixed tooth plate 3 and the lower fixed tooth plate 5. Connected, the water seepage channel 22 is connected with the external water pipe 21, the upper fixed toothed disc 3 and the lower fixed toothed disc 5 are fixed on the liquid storage chamber 1, the movable toothed disc 4 is fixed on the transmission shaft 6, and the transmission shaft 6 passes through the bearing seat 7 and The liquid storage chamber 1 is connected to the pulley 9, the bearing seat 7 is fixed on the liquid storage chamber 1, the stretching unit is located in the liquid storage chamber 1, the upper part of the liquid storage chamber 1 is provided with a liquid inlet 10, and the lower part is provided with a liquid outlet 11.

During use, as shown in Fig. 1 to Fig. 7, at first the distribution water is provided to the water infiltration channel 22 of the upper fixed tooth disc 3 and the lower fixed tooth disc 5 through the external water pipe 21, and the distribution injection water is sprayed from the nozzle 23 through the water seepage channel 22. Then set the external power device with the accelerated polymer swelling particle dissolving device with instant ring and cleaning tank, so that the belt pulley 9 drives the transmission shaft 6, so that the movable toothed disc 4 rotates. The aqueous solution of the incompletely dissolved hydrophobic association polymer enters the liquid storage chamber 1 from the liquid inlet 10 of the upper cover 12, the aqueous solution of the hydrophobic association polymer passes through the cleaner 19, and then enters the upper fixed tooth plate 3 from the through hole 2 in turn and the movable toothed plate 4, and then the driven toothed plate 4 enters the lower fixed toothed plate 5. Since the upper fixed toothed plate 3, the movable toothed plate 4 and the lower fixed toothed plate 5 all adopt concentric circular ring gears, the ring gear adopts a short tooth 8 structure, The concentric circular gear rings of the movable gear plate and the concentric circular gear rings of the upper fixed gear plate and the lower fixed gear plate are uniformly meshed to form an instant structural ring. The short tooth 8 on the concentric ring gear of the lower fixed toothed disc 3 and the movable toothed disc 4 has a trapezoidal upper structure, and the upper fixed toothed disc 3 and the movable toothed disc 4, the movable toothed disc 4 and the lower fixed toothed disc 5 have an interlocking distance of 13 from the upper part to the lower fixed toothed disc 5. The lower part gradually decreases, and the movable tooth disc 4 operates at a speed of 1400rpm, so the swollen particles of the hydrophobic association polymer in the aqueous solution of the hydrophobic association polymer are rolled and expanded by the short tooth 8 structure, forming a swollen particle with a smaller particle size particles. A number of trapezoidal grooves 24 are respectively provided on the surfaces where the upper fixed toothed disc 3, the lower fixed toothed disc 5 and the movable toothed disc 4 are engaged. 1. For the trapezoidal groove 24 of the lower fixed toothed disc 5, the bottom angle of the front end of the moving toothed disc 4 in the direction of rotation is an obtuse angle, and the bottom angle of the rear end is an acute angle. The angle is 75°, and the bottom angle of the rear end is 25°. This design can force the fluid in the liquid storage chamber 1 to flow forward to prevent blockage. The processed swollen particles enter the pipeline connected to the aging tank through the liquid outlet 11, and finally enter the aging tank for dissolution.

The mechanical seal 14 set between the lower part of the transmission shaft 6 and the bearing seat 7 prevents the solution in the liquid storage chamber 1 from entering the transmission shaft 6 and corroding the transmission shaft 6, while the central part fixed on the bearing seat 7 outside the mechanical seal 14 Device 15 can prevent transmission shaft 6 from shaking and offsetting.

Fig. 2 is a schematic diagram of the trapezoidal groove on the lower fixed tooth plate of the accelerated polymer swelling particle dissolution device with an instant ring and a cleaning groove. The trapezoidal groove 24 is specifically located on the short tooth 8 on the lower fixed toothed disc 5 . The trapezoidal groove 24 on the upper fixed toothed disc is also located on the short tooth 8 on the upper fixed toothed disc 3 .

As shown in Figure 3, the schematic diagram of the water penetration of the lower fixed tooth plate of the accelerated polymer swelling particle dissolution device with the instant ring and the cleaning tank, the injection water enters the water seepage channel 22 through the external water pipe 21, and then passes through the water seepage channel 22 through the lower fixed tooth 18. The nozzle 23 flows out. Simultaneously, spray nozzle 23 also can be positioned at other places on the disc surface of upper fixed tooth disc 3 and lower fixed tooth disc 5 .

Figure 4 is a top view of the movable toothed plate of the accelerated polymer swelling particle dissolving device with instant ring and cleaning tank, the movable toothed plate 4 is driven by the transmission shaft 6 to run, and the swelling particles of the hydrophobic association polymer are driven by the short teeth 8 The structure is rolled and expanded to form swollen particles with smaller particle size, which flow out from the through hole 2 .

Figure 5 is an enlarged sectional view of the short tooth structure of the upper fixed toothed disc, the movable toothed disc, and the lower fixed toothed disc of the accelerated polymer swelling particle dissolution device with an instant ring and a cleaning tank. The upper fixed teeth 16 of the upper fixed tooth disc 3 and the movable teeth 17 of the movable tooth disc 4 form a first-level instant structure. The upper fixed teeth 16 and the movable teeth 17 interlock with each other and have an interlocking distance 13. The upper entrance of the interlocking distance 13 is 2.45mm , The lower outlet of the occlusal spacing 13 is 0.45mm, and the depth of 0.45mm is 5mm. The movable teeth 17 of the movable tooth disc 4 and the lower fixed teeth 18 of the lower fixed tooth disc 5 form a secondary instant structure. The movable teeth 17 and the lower fixed teeth 18 interlock with each other and have an interlocking distance of 13. 13 The lower outlet is 0.15mm, and its depth of 0.15mm is 5mm. Through the above bipolar instant dissolving structure, the swollen particles can be forcibly stretched to obtain swollen particles with a smaller particle size, and the effect is better than that of only one fixed toothed disc and a movable toothed disc.

Fig. 6 is the top view of the cleaner of the accelerated polymer swelling particle dissolving device with instant ring and cleaning tank, the cleaner 19 is fixed on the drive shaft 6, and driven by the motor, the impeller rotates to clean the upper fixed toothed disc 3 The polymer swells the particles. Because when the polymer swelling particles are large, they will adhere to the upper fixed tooth disc 3, which will block the through hole 2 on the upper fixed tooth disc 3 and affect the normal operation of the device or reduce the efficiency. At this time, the cleaner 19 is driven by the transmission shaft 6 Run down to clean up the swollen particles of the attached polymer on the upper fixed tooth disc 3. The cleaner structure of the cross-shaped impeller composed of four blades 20 is simple, and the effect of cleaning is also better, and the cleaning device 19 and the upper fixed tooth disc 3 The distance is determined according to the specifications of the polymer in order to achieve the best results.

Fig. 7 is the schematic diagram of another kind of improvement of this accelerated polymer swelling granule dissolving device with quick-dissolving ring and cleaning tank, and this improvement puts motor 25 on top and directly drives drive shaft 6, and drive shaft 6 passes through mechanical seal 14, centralizer 15. The bearing seat 7 is connected to the liquid storage chamber 1, the motor 25 is connected to the transmission shaft 6, and the motor 25 is fixed by a bracket. The improvement can save space, simplify equipment, and facilitate installation, and can also reduce corrosion of the transmission shaft by liquid.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technology can easily think of changes or replacements within the technical scope disclosed in the present invention. , should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. acceleration polymers swell grain dissolution device with instant ring and cleaning slot, it is characterized in that: this device is by cleaner, draw unit and liquid storage cylinder form, draw unit is by upper fixed tooth disk, active toothed disk, lower fixed tooth disk, power transmission shaft, bearing block forms, draw unit top is the cleaner that is fixed on power transmission shaft, described cleaner is comprised of a plurality of impellers, the cleaner bottom is followed successively by the upper fixed tooth disk that all has some through holes, active toothed disk, lower fixed tooth disk, described upper fixed tooth disk, active toothed disk, lower fixed tooth disk is formed by connecting by some groups of waney concentric circles gear rings, the concentric circles gear ring of described active toothed disk and upper fixed tooth disk, the even interlock of concentric circles gear ring of lower fixed tooth disk, described upper fixed tooth disk, lower fixed tooth disk is respectively equipped with some dovetail grooves with the face of active toothed disk phase interlock, described upper fixed tooth disk and lower fixed tooth disk inside are provided with some water and ooze passage and communicate with several nozzles on short toothing, water oozes passage and is connected with external water pipe, upper fixed tooth disk and lower fixed tooth disk are fixed on liquid storage cylinder, active toothed disk is fixed on power transmission shaft, power transmission shaft is connected belt pulley by bearing block with liquid storage cylinder, bearing block is fixed on liquid storage cylinder, draw unit is positioned at liquid storage cylinder, liquid storage cylinder top is provided with inlet, the bottom is provided with liquid outlet.

2. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, is characterized in that, described cleaner is the cross shape impeller, and the blade of cleaner impeller is perpendicular to upper fixed tooth disk.

3. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, it is characterized in that, described dovetail groove is toward front end its base angle of active toothed disk rotation direction in obtuse angle, and its base angle, rear end is acute angle, its base angle is 75 °, and its base angle, rear end is 25 °.

4. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1 or 2, is characterized in that, described dovetail groove is evenly distributed on fixed tooth disk and lower fixed tooth disk and active toothed disk mutually on the face of interlock, amounts to 132 dovetail grooves.

5. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, is characterized in that, the concentric circles gear ring tooth depth 3～5cm of described upper fixed tooth disk, lower fixed tooth disk and active toothed disk, and gear ring surface is designed for arc transition.

6. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 5, it is characterized in that, there is twill on the concentric circles gear ring surface of described active toothed disk, the spacing of twill is 5mm, the degree of depth is 1mm, described twill and active toothed disk rotation direction present certain angle, and angle is 15 °.

7. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, it is characterized in that, the concentric circles gear ring top of described active toothed disk and lower fixed tooth disk is trapezoidal, and the interlock spacing of upper fixed tooth disk and active toothed disk, active toothed disk and lower fixed tooth disk reduces from top to the bottom gradually.

8. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, is characterized in that, also is provided with mechanical seal in the middle of described power transmission shaft bottom and bearing block, and the mechanical seal outside is provided with centralizer, and is fixed on bearing block.

9. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, it is characterized in that, described liquid storage cylinder is comprised of upper cover and housing, and upper cover is connected connecting bolt to connect and sealing with housing, inlet is located at upper cover top, and liquid outlet is located at lower housing portion.

10. the acceleration polymers swell grain dissolution device with instant ring and cleaning slot as claimed in claim 1, is characterized in that, described power transmission shaft is connected with liquid storage cylinder by bearing block puts motor on the outside.

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