CN113482584B - Circulating CO for petroleum exploitation 2 Oil displacement and liquid injection device - Google Patents
Circulating CO for petroleum exploitation 2 Oil displacement and liquid injection device Download PDFInfo
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- CN113482584B CN113482584B CN202110970698.XA CN202110970698A CN113482584B CN 113482584 B CN113482584 B CN 113482584B CN 202110970698 A CN202110970698 A CN 202110970698A CN 113482584 B CN113482584 B CN 113482584B
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- 238000002347 injection Methods 0.000 title claims abstract description 139
- 239000007924 injection Substances 0.000 title claims abstract description 139
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 14
- 239000003208 petroleum Substances 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 137
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 238000002156 mixing Methods 0.000 claims abstract description 53
- 239000007921 spray Substances 0.000 claims abstract description 20
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 claims description 21
- 238000005057 refrigeration Methods 0.000 claims description 15
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 230000037452 priming Effects 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 177
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 88
- 239000001569 carbon dioxide Substances 0.000 abstract description 88
- 238000004090 dissolution Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 26
- 230000009471 action Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Abstract
The invention relates to a circulating CO for petroleum exploitation 2 The oil displacement and liquid injection device comprises a bottom plate, a support frame, a sealing box, a pipe sleeve, a water inlet pipe, an air inlet pipe, a first motor, a rotating shaft, a first connecting plate, a second connecting plate, a mixing pipe, an air pump, a plurality of spray heads, a first gear, an annular gear and a carbonic water pipe; the water enters the sealed box through the water inlet pipe in the pipe sleeve, the water and the carbon dioxide are mixed in the sealed box, the carbon dioxide enters the bottom of the sealed box through the air inlet pipe in the pipe sleeve, so that the carbon dioxide is fused into the water, the carbonated water is obtained, and then the prepared carbonated water is discharged from the carbonated water pipe at the bottom. According to the invention, carbon dioxide is discharged through the spray head communicated with the mixing pipe, the solubility of the carbonated water can be effectively improved by circularly injecting the carbon dioxide, and the uniform mixing of the carbon dioxide in the sealing box is realized by rotating the spray head, so that the dissolution of the carbon dioxide in the water in the sealing box can be ensured.
Description
Technical Field
The invention relates to the field of petroleum exploitation, in particular to a circulating CO for petroleum exploitation 2 And the oil displacement and liquid injection device.
Background
The eastern main oil production area in China has fewer carbon dioxide gas sources, but the research and the on-site pilot test of the technology for improving the recovery ratio by injecting carbon dioxide are not stopped. The carbon dioxide oil displacement technology is increasingly applied to oil fields, and field tests are carried out on the oil fields such as Jiangsu, yuan, daqing, victory and the like.
The carbon dioxide flooding technology is a technology for injecting carbon dioxide into an oil layer to improve the oil extraction rate of an oil field; the carbon dioxide does not form a miscible phase upon initial contact with the formation crude oil, but under conditions of suitable pressure, temperature and crude oil composition, the carbon dioxide may form a miscible front. Supercritical fluids will extract heavier hydrocarbons from crude oil and continue to concentrate the gas displacing the front.
The carbon dioxide is injected mainly by four modes of continuous carbon dioxide gas injection, carbonated water injection, alternate injection of water and carbon dioxide gas injection and simultaneous injection of carbon dioxide and water. The existing equipment can only meet the requirement that carbon dioxide is injected in one mode, so that the applicability of the carbon dioxide injection equipment is greatly reduced.
Wherein the carbonated water is characterized in that: 1. because carbon dioxide in water is easier to dissolve in crude oil, carbon dioxide in stratum behind the water injection front edge can be transferred into a residual oil phase, the viscosity of the crude oil is reduced, the oil phase permeability is improved, meanwhile, carbon dioxide in carbonated water has a tackifying effect on water, the fluidity ratio can be improved, and capillary force at an oil-water phase interface is reduced and the rock wetting visual angle is reduced. Where the original water cannot reach, the original water can reach the original water because of the carbon dioxide dissolved in the water, and the reach coefficient of carbonation is generally several times higher than that of the ordinary water. 2. Because crude oil and carbon dioxide have a deeper chemical "affinity" relationship than water and carbon dioxide, molecules of carbon dioxide diffuse when carbonated water contacts petroleum, so that heavy oil films attached to the surface of a rock skeleton are loosened, and finally the oil films move, and the oil washing efficiency is improved. In summary, the solubility of carbon dioxide in water (i.e., the amount of carbonic acid formed) is primarily dependent on three factors: 1. the temperature of water, 2, the water vapor pressure, 3 and the contact area of water and carbon dioxide.
In the existing equipment, carbon dioxide is directly injected into water in the preparation process of carbonated water, but because the solubility of the carbon dioxide and a book is low, the carbon dioxide cannot be dissolved with the water in time, so that a large amount of carbon dioxide is consumed, and the carbon dioxide is diffused in the atmosphere, so that the environment is polluted to a certain extent. The carbonated water and the instability thereof are extremely unstable in the process of transporting the carbonated water, and the carbonated water is decomposed into carbon dioxide and water at a slightly high temperature, so that the effect is not ideal when the carbonated water is injected into the oil field.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to solve the technical problems that: in the process of preparing carbonated water, a large amount of carbon dioxide is consumed because carbon dioxide is not dissolved in time.
In order to solve the technical problems, the invention adopts the following technical scheme: a circulating CO oil displacement priming device for petroleum exploitation comprises a bottom plate, a support frame, a sealing box, a pipe sleeve, a water inlet pipe, an air inlet pipe, a first motor, a rotating shaft, a first connecting plate, a second connecting plate, a mixing pipe, an air pump, a plurality of spray heads, a first gear, an inner gear ring and a carbonic acid water pipe; the upper end of the bottom plate is provided with a supporting frame, and the lower end of the supporting frame is fixedly connected with the bottom plate; the upper end of the support frame is provided with a seal box which is fixedly connected with the support frame; the upper end of the sealing box is provided with a pipe sleeve, the pipe sleeve is communicated with the sealing box, a water inlet pipe and an air inlet pipe are arranged in the pipe sleeve, the water inlet pipe and the air inlet pipe are respectively communicated with the sealing box, and one end of the air inlet pipe is arranged at the bottom of the sealing box; the first motor is arranged at the upper end of the sealing box, and the shell of the first motor is fixedly connected with the sealing box; the rotating shaft is vertically arranged in the sealing box, the upper end and the lower end of the rotating shaft are respectively and rotatably connected with the sealing box, the upper end of the rotating shaft is fixedly connected with the output shaft of the first motor, and the rotating shaft and the output shaft of the first motor are on the same axis; the first connecting plate is horizontally arranged, one end of the first connecting plate is fixedly connected with the rotating shaft, and the other end of the first connecting plate is fixedly connected with the mixing pipe; the second connecting plate is arranged below the first connecting plate, the second connecting plate is arranged in parallel with the first connecting plate, one end of the second connecting plate is fixedly connected with the rotating shaft, and the other end of the second connecting plate is fixedly connected with the mixing pipe; the mixing pipe is arranged in the sealing box, an air pump is arranged at the top of the mixing pipe, an air inlet of the air pump is communicated with the sealing box, and an air outlet of the air pump is communicated with the mixing pipe; the mixing pipe is provided with a plurality of spray heads which are distributed in a circumferential array, and the spray heads are respectively communicated with the mixing pipe; the mixing pipe is sleeved with a first gear, the first gear is arranged between the first connecting plate and the second connecting plate, and the first gear is rotatably connected with the mixing pipe; the inner gear ring is arranged in the sealing box, the outer ring of the inner gear ring is fixedly connected with the sealing box, the inner gear ring is horizontally arranged, and the inner gear ring is meshed with the first gear; the carbonic acid water pipe is arranged at the lower end of the sealing box, and the carbonic acid water pipe is communicated with the sealing box.
In the invention, water enters the sealed box through the water inlet pipe in the pipe sleeve, water and carbon dioxide are mixed in the sealed box, and carbon dioxide enters the bottom of the sealed box through the air inlet pipe in the pipe sleeve, so that the carbon dioxide is fused into the water, carbonated water is obtained, and then the prepared carbonated water is discharged from the carbonated water pipe at the bottom; then first motor action, first motor drives rather than output shaft fixed connection's axis of rotation, the axis of rotation drives rather than fixed connection's first connecting plate and second connecting plate rotation, make first connecting plate and second connecting plate drive rather than fixed connection's hybrid tube rotation, the hybrid tube drives first gear and rotates on the ring gear, make a plurality of shower nozzles on the hybrid tube rotate, in the in-process of mixing, the unavoidable carbon dioxide that fails to mix, the air pump will fail to mix carbon dioxide suction to the hybrid tube in, then the carbon dioxide is through the shower nozzle blowout with hybrid tube intercommunication, thereby increase water and carbon dioxide's area of contact, the circulation injection of carbon dioxide can effectually improve the solubility of carbonic acid water, through the rotation of shower nozzle, realize the even mixing of carbon dioxide in the seal box, the water in the guarantee seal box can both carry out the dissolution of carbon dioxide.
Preferably, the refrigerator further comprises a refrigerating structure; the refrigerating structure comprises a refrigerating pipe, a water pump and a refrigerator; one end of the refrigeration pipe is communicated with the lower part of the sealing box, and the other end of the refrigeration pipe is communicated with the upper part of the sealing box; the refrigerator is sleeved on the refrigeration pipe and fixedly connected with the upper end of the bottom plate; the water pump is arranged on the refrigeration pipe and fixedly connected with the upper end of the bottom plate. The water pump is used for pumping out the water at the lower end of the sealing box through the refrigerating pipe, and then after the water is refrigerated by the refrigerator, the water is discharged into the sealing box to continuously react with the carbon dioxide, so that the water in the sealing box is ensured to be in a certain temperature range, and the carbon dioxide can be more easily dissolved into the water.
Preferably, the device further comprises a fixing frame; the fixing frame comprises a vertical frame and a horizontal frame; the vertical frame is vertically fixed on the bottom plate and fixedly connected with the upper end and the lower end of the refrigeration pipe; the transverse frame is transversely arranged, one end of the transverse frame is fixed on the vertical frame, and the other end of the transverse frame is fixedly connected with the refrigerating pipe. The refrigerating tube is fixed, so that the deformation probability of the refrigerating tube is effectively reduced.
Preferably, the motor cover is fixedly arranged at the upper end of the sealing box, the motor cover is sleeved outside the first motor, a through groove is formed in the top surface of the motor cover, a heat dissipation net is arranged in the through groove, and the heat dissipation net is fixedly connected with the motor cover. The motor cover plays the guard action to first motor, and the heat dissipation net can discharge the steam, plays radiating effect.
Preferably, the method further comprises an injection structure; the injection structure comprises an injection box, an injection pipe, a second motor, a second gear, an outer gear ring, a sliding sleeve, two swing structures with the same structure and an electric push rod; the upper end of the injection box is communicated with a carbonic acid water pipe; the injection pipe is vertically arranged at the lower end of the injection box, and the upper end of the injection pipe is rotatably connected with the lower end of the injection box; the second motor is arranged in the injection box, the shell of the second motor is fixedly connected with the injection box, the output shaft of the second motor penetrates out of the injection box and is rotatably connected with the injection box, and the output shaft of the second motor is arranged in parallel with the injection pipe; the second gear is sleeved on the output shaft of the second motor and is fixedly connected with the output shaft of the second motor; the outer gear ring is sleeved on the injection pipe and fixedly connected with the injection pipe, and the outer gear ring is meshed with the second gear; the sliding sleeve is sleeved on the injection pipe and is connected with the injection pipe in an up-down sliding manner.
The two swing structures with the same structure are symmetrically arranged, and each swing structure with the same structure comprises a plurality of injection branch pipes and an L-shaped connecting frame; the injection branch pipes are vertically arranged on one side of the injection pipe, are communicated with the injection pipe and are respectively and rotatably connected with the injection pipe; the vertical part of the L-shaped connecting frame is arranged on the injection branch pipes, the L-shaped connecting frame is rotatably connected with the injection branch pipes, and the transverse part of the L-shaped connecting frame is fixedly connected with the sliding sleeve; the electric push rod is vertically arranged on the injection pipe, the shell of the electric push rod is fixedly connected with the injection pipe, and the piston rod of the electric push rod is fixedly connected with the sliding sleeve.
The carbonic acid water pipe injects carbonic acid water into the injection box, then enters the injection pipe, and under the action of pressure, the carbonic acid water in the injection pipe is discharged into an oil field through a plurality of injection branch pipes; the electric push rod acts, and the electric push rod drives the sliding sleeve to move up and down, so that the sliding sleeve drives the injection branch pipes to swing up and down through the L-shaped connecting frame, and the injection branch pipes are used for injecting carbonated water into the up and down positions in the oil field.
Preferably, the injection box further comprises a second motor shell, wherein the second motor shell is arranged in the injection box, the second motor shell is sleeved on the second motor, and the second motor shell is fixedly connected with the injection box. The safety of the second motor is protected, and the second motor can be effectively prevented from being short-circuited due to water inlet.
Preferably, the device further comprises an automatic control structure; the automatic control structure comprises a pressure sensor, a temperature sensor, two flow valves and a PLC; the signal acquisition ends of the pressure sensor and the temperature sensor are arranged in the sealing box; one flow valve is arranged on the water inlet pipe, and the other flow valve is arranged on the air inlet pipe; the signal input end of the PLC is connected with the pressure sensor and the temperature sensor, and the signal output end of the PLC is connected with the two flow valves and the refrigerator. The PLC controls the actions of the two flow valves according to the pressure data collected by the pressure sensor, so that the pressure in the sealing box is kept constant; the PLC controls the action of the refrigerator according to the temperature data acquired by the temperature sensor, so that the temperature of the sealing box is kept constant, and automatic control is realized.
Compared with the prior art, the invention has at least the following advantages:
1. and carbon dioxide is circularly injected, so that the mixing efficiency of water and carbon dioxide is improved. The water enters the sealed box through the water inlet pipe in the pipe sleeve, the water and the carbon dioxide are mixed in the sealed box, the carbon dioxide enters the bottom of the sealed box through the air inlet pipe in the pipe sleeve, so that the carbon dioxide is fused into the water, carbonated water is obtained, and then the prepared carbonated water is discharged from the carbonated water pipe at the bottom; then first motor action, first motor drives rather than output shaft fixed connection's axis of rotation, the axis of rotation drives rather than fixed connection's first connecting plate and second connecting plate rotation, make first connecting plate and second connecting plate drive rather than fixed connection's hybrid tube rotation, the hybrid tube drives first gear and rotates on the ring gear, make a plurality of shower nozzles on the hybrid tube rotate, in the in-process of mixing, the unavoidable carbon dioxide that fails to mix, the air pump will fail to mix carbon dioxide suction to the hybrid tube in, then the carbon dioxide is through the shower nozzle blowout with hybrid tube intercommunication, thereby increase water and carbon dioxide's area of contact, the circulation injection of carbon dioxide can effectually improve the solubility of carbonic acid water, through the rotation of shower nozzle, realize the even mixing of carbon dioxide in the seal box, the water in the guarantee seal box can both carry out the dissolution of carbon dioxide.
2. Crude oil in the oil field is mixed with carbonated water more uniformly. The carbonic acid water pipe injects carbonic acid water into the injection box, then enters the injection pipe, and under the action of pressure, the carbonic acid water in the injection pipe is discharged into an oil field through a plurality of injection branch pipes; the electric push rod acts, and the electric push rod drives the sliding sleeve to move up and down, so that the sliding sleeve drives the injection branch pipes to swing up and down through the L-shaped connecting frame, and the injection branch pipes are used for injecting carbonated water into the up and down positions in the oil field.
3. The carbon dioxide is prevented from being decomposed into carbon dioxide and water due to the fact that the carbon dioxide is extremely unstable in the transportation process and the temperature is slightly higher. In the invention, the carbonated water is directly prepared on the spot, so that the transportation process of the carbonated water is omitted, and the dissolution amount of carbon dioxide in the carbonated water is greatly improved.
Drawings
Fig. 1 is a perspective view of the whole device of the embodiment.
Fig. 2 is a front cross-sectional view of the overall device of the embodiment.
FIG. 3 is an exploded view of the parts within the seal box of the embodiment.
Fig. 4 is a schematic structural view of a fixing frame according to an embodiment.
Fig. 5 is a schematic structural diagram of an injection structure according to an embodiment.
In the figure, the device comprises a 1-sealed box, a 2-first motor, a 3-rotating shaft, a 4-mixing pipe, a 5-air pump, a 6 a-first connecting plate, a 6 b-second connecting plate, a 7-first gear, an 8-annular gear, a 9-motor cover, a 10-cooling net, a 11-spray head, a 12-sleeve, a 13-supporting frame, a 14-base plate, a 15-water inlet pipe, a 16-air inlet pipe, a 17-refrigerating pipe, a 18-water pump, a 19-refrigerator, a 20-vertical frame, a 21-transverse frame, a 22-injection box, a 23-injection pipe, a 24-second motor, a 25-second gear, a 26-outer gear ring, a 27-sliding sleeve, a 28-electric push rod, a 29-injection branch pipe, a 30-L-type connecting frame, a 31-second motor casing and a 32-carbonic acid water pipe.
Detailed Description
The present invention will be described in further detail below.
In the present invention, 'front', 'rear', 'left', 'right', 'up', 'down' refer to the orientation in fig. 1, wherein 'front' refers to facing outwards in fig. 1 with respect to the page, and 'rear' refers to facing inwards in fig. 1 with respect to the page. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-5, one embodiment provided by the present invention is: circulating CO for petroleum exploitation 2 The oil displacement and liquid injection device comprises a bottom plate 14, a support frame 13, a seal box 1, a pipe sleeve 12, a water inlet pipe 15, an air inlet pipe 16, a first motor 2, a rotating shaft 3, a first connecting plate 6a, a second connecting plate 6b, a mixing pipe 4, an air pump 5, a plurality of spray heads 11, a first gear 7, an inner gear ring 8 and a carbonic acid water pipe 32; the upper end of the bottom plate 14 is provided with a supporting frame 13, and the lower end of the supporting frame 13 is fixedly connected with the bottom plate 14; the upper end of the supporting frame 13 is provided with a sealing box 1, theThe sealing box 1 is fixedly connected with the supporting frame 13; the upper end of the sealing box 1 is provided with a pipe sleeve 12, the pipe sleeve 12 is communicated with the sealing box 1, a water inlet pipe 15 and an air inlet pipe 16 are arranged in the pipe sleeve 12, the water inlet pipe 15 and the air inlet pipe 16 are respectively communicated with the sealing box 1, and one end of the air inlet pipe 16 is arranged at the bottom of the sealing box 1; the first motor 2 is arranged at the upper end of the sealing box 1, and a shell of the first motor 2 is fixedly connected with the sealing box 1; the rotating shaft 3 is vertically arranged in the sealing box 1, the upper end and the lower end of the rotating shaft 3 are respectively and rotatably connected with the sealing box 1, the upper end of the rotating shaft 3 is fixedly connected with the output shaft of the first motor 2, and the rotating shaft 3 and the output shaft of the first motor 2 are on the same axis; the first connecting plate 6a is horizontally arranged, one end of the first connecting plate 6a is fixedly connected with the rotating shaft 3, and the other end of the first connecting plate 6a is fixedly connected with the mixing pipe 4; the second connecting plate 6b is arranged below the first connecting plate 6a, the second connecting plate 6b is arranged in parallel with the first connecting plate 6a, one end of the second connecting plate 6b is fixedly connected with the rotating shaft 3, and the other end of the second connecting plate 6b is fixedly connected with the mixing pipe 4; the mixing pipe 4 is arranged in the sealing box 1, an air pump 5 is arranged at the top of the mixing pipe 4, an air inlet of the air pump 5 is communicated with the sealing box 1, and an air outlet of the air pump 5 is communicated with the mixing pipe 4; the mixing pipe 4 is provided with a plurality of spray heads 11, the spray heads 11 are distributed in a circumferential array, and the spray heads 11 are respectively communicated with the mixing pipe 4; the mixing tube 4 is sleeved with a first gear 7, the first gear 7 is arranged between a first connecting plate 6a and a second connecting plate 6b, and the first gear 7 is rotatably connected with the mixing tube 4; the inner gear ring 8 is arranged in the sealed box 1, the outer ring of the inner gear ring 8 is fixedly connected with the sealed box 1, the inner gear ring 8 is horizontally arranged, and the inner gear ring 8 is meshed with the first gear 7; the carbonic acid water pipe 32 is arranged at the lower end of the sealing box 1, and the carbonic acid water pipe 32 is communicated with the sealing box 1.
In the concrete implementation, water enters the sealed box 1 through the water inlet pipe 15 in the pipe sleeve 12, the water and the carbon dioxide are mixed in the sealed box 1, the carbon dioxide enters the bottom of the sealed box 1 through the air inlet pipe 16 in the pipe sleeve 12, so that the carbon dioxide is fused into the water, carbonated water is obtained, and then the prepared carbonated water is discharged from the carbonated water pipe 32 at the bottom; then the first motor 2 acts, the first motor 2 drives the rotation shaft 3 fixedly connected with the output shaft of the first motor to rotate, the rotation shaft 3 drives the first connecting plate 6a and the second connecting plate 6b fixedly connected with the rotation shaft, the first connecting plate 6a and the second connecting plate 6b drive the mixing tube 4 fixedly connected with the first connecting plate and the second connecting plate to rotate, the mixing tube 4 drives the first gear 7 to rotate on the ring gear 8, a plurality of spray heads 11 on the mixing tube 4 rotate, in the mixing process, carbon dioxide which cannot be mixed is inevitably prevented, the air pump 5 pumps the carbon dioxide which cannot be mixed into the mixing tube 4, then the carbon dioxide is sprayed out through the spray heads 11 communicated with the mixing tube 4, so that the contact area of water and the carbon dioxide is increased, the solubility of the carbonic acid water can be effectively improved, the uniform mixing of the carbon dioxide in the sealing box 1 is guaranteed, and the water in the sealing box 1 can be dissolved.
In specific implementation, in order to ensure the tightness of the seal box 1, sealing measures should be added at each communicating position with the seal box 1, such as adding a sealing ring, a sealing gasket, etc. at the communicating position, so as to prevent leakage of carbon dioxide.
In particular, in order to ensure that the operation can be continuously performed in the sealed box 1, a transfer station is provided on the carbonated water pipe 32, and the mixed carbonated water is sent to the transfer station for storage, and is directly extracted from the transfer station when the carbonated water needs to be used.
Further, the refrigerator also comprises a refrigeration structure; the refrigeration structure comprises a refrigeration pipe 17, a water pump 18 and a refrigerator 19; one end of the refrigerating pipe 17 is communicated with the lower part of the sealed box 1, and the other end of the refrigerating pipe 17 is communicated with the upper part of the sealed box 1; the refrigerator 19 is sleeved on the refrigerating pipe 17, and the refrigerator 19 is fixedly connected with the upper end of the bottom plate 14; the water pump 18 is arranged on the refrigerating pipe 17, and the water pump 18 is fixedly connected with the upper end of the bottom plate 14. In specific implementation, the water pump 18 pumps out the water at the lower end of the seal box 1 through the refrigerating pipe 17, and then after refrigerating by the refrigerator 19, the water is discharged into the seal box 1 to react with carbon dioxide continuously, so that the water in the seal box 1 is ensured to be in a certain temperature range, and the carbon dioxide can be dissolved into the water more easily.
Further, the device also comprises a fixing frame; the fixing frame comprises a vertical frame 20 and a horizontal frame 21; the vertical frame 20 is vertically fixed on the bottom plate 14, and the vertical frame 20 is fixedly connected with the upper end and the lower end of the refrigeration pipe 17; the transverse frame 21 is transversely arranged, one end of the transverse frame 21 is fixed on the vertical frame 20, and the other end of the transverse frame 21 is fixedly connected with the refrigerating tube 17. The refrigerating tube 17 is fixed, so that the probability of deformation of the refrigerating tube 17 is effectively reduced.
Further, the motor cover 9 is fixedly arranged at the upper end of the sealing box 1, the motor cover 9 is sleeved outside the first motor 2, a through groove is formed in the top surface of the motor cover 9, a heat dissipation net 10 is arranged in the through groove, and the heat dissipation net 10 is fixedly connected with the motor cover 9. The motor cover 9 plays a role in protecting the first motor 2, and the heat radiation net 10 can discharge hot air to play a role in heat radiation.
Further, the method also comprises an injection structure; the injection structure comprises an injection box 22, an injection pipe 23, a second motor 24, a second gear 25, an outer gear ring 26, a sliding sleeve 27, two swing structures with the same structure and an electric push rod 28; the upper end of the injection tank 22 is communicated with a carbonic acid water pipe 32; the injection pipe 23 is vertically arranged at the lower end of the injection box 22, and the upper end of the injection pipe 23 is rotatably connected with the lower end of the injection box 22; the second motor 24 is disposed in the injection box 22, the housing of the second motor 24 is fixedly connected with the injection box 22, the output shaft of the second motor 24 penetrates out of the injection box 22, the output shaft of the second motor 24 is rotatably connected with the injection box 22, and the output shaft of the second motor 24 is parallel to the injection pipe 23; the second gear 25 is sleeved on the output shaft of the second motor 24, and the second gear 25 is fixedly connected with the output shaft of the second motor 24; the outer gear ring 26 is sleeved on the injection pipe 23, the outer gear ring 26 is fixedly connected with the injection pipe 23, and the outer gear ring 26 is meshed with the second gear 25; the sliding sleeve 27 is sleeved on the injection pipe 23, and the sliding sleeve 27 is connected with the injection pipe 23 in an up-and-down sliding manner.
The two swing structures with the same structure are symmetrically arranged, and the two swing structures with the same structure comprise a plurality of injection branch pipes 29 and an L-shaped connecting frame 30; the injection branch pipes 29 are vertically arranged on one side of the injection pipe 23, the injection branch pipes 29 are communicated with the injection pipe 23, and the injection branch pipes 29 are respectively and rotatably connected with the injection pipe 23; the vertical part of the L-shaped connecting frame 30 is arranged on the plurality of injection branch pipes 29, the L-shaped connecting frame 30 is rotatably connected with the plurality of injection branch pipes 29, and the horizontal part of the L-shaped connecting frame 30 is fixedly connected with the sliding sleeve 27; the electric push rod 28 is vertically arranged on the injection pipe 23, the shell of the electric push rod 28 is fixedly connected with the injection pipe 23, and the piston rod of the electric push rod 28 is fixedly connected with the sliding sleeve 27. In practice, the carbonated water pipe 32 injects carbonated water into the injection tank 22 and then into the injection pipe 23, and under the action of pressure, the carbonated water in the injection pipe 23 is discharged into the oil field through the plurality of injection branch pipes 29; the electric push rod 28 acts, and the electric push rod 28 drives the sliding sleeve 27 to move up and down, so that the sliding sleeve 27 drives the injection branch pipes 29 to swing up and down through the L-shaped connecting frame 30, and the injection branch pipes 29 are used for injecting carbonated water into the up and down positions in an oil field.
Further, the injection box further comprises a second motor casing 31, the second motor casing 31 is arranged in the injection box 22, the second motor casing 31 is sleeved on the second motor 24, and the second motor casing 31 is fixedly connected with the injection box 22. The safety of the second motor 24 is protected, and the second motor 24 can be effectively prevented from being short-circuited due to water inflow.
Further, the device also comprises an automatic control structure; the automatic control structure comprises a pressure sensor, a temperature sensor, two flow valves and a PLC; the signal acquisition ends of the pressure sensor and the temperature sensor are arranged in the sealing box 1; one of the flow valves is arranged on the water inlet pipe 15, and the other flow valve is arranged on the air inlet pipe 16; the signal input end of the PLC is connected with the pressure sensor and the temperature sensor, and the signal output end of the PLC is connected with the two flow valves and the refrigerator 19. The PLC controls the actions of the two flow valves according to the pressure data collected by the pressure sensor, so that the pressure in the sealed box 1 is kept constant; the PLC controls the action of the refrigerator 19 according to the temperature data acquired by the temperature sensor, so that the temperature of the sealed box 1 is kept constant, and automatic control is realized.
The circulating CO for petroleum exploitation 2 The working principle of the oil displacement and liquid injection device is as follows:
water enters the sealed box 1 through the water inlet pipe 15 in the pipe sleeve 12, water and carbon dioxide are mixed in the sealed box 1, carbon dioxide enters the bottom of the sealed box 1 through the air inlet pipe 16 in the pipe sleeve 12, so that the carbon dioxide is melted into the water, carbonated water is obtained, then the first motor 2 acts, the first motor 2 drives the rotating shaft 3 fixedly connected with the output shaft of the first motor to rotate, the rotating shaft 3 drives the first connecting plate 6a and the second connecting plate 6b fixedly connected with the rotating shaft, the first connecting plate 6a and the second connecting plate 6b drive the mixing pipe 4 fixedly connected with the first connecting plate to rotate, the mixing pipe 4 drives the first gear 7 to rotate on the ring gear 8, a plurality of spray heads 11 on the mixing pipe 4 rotate, in the mixing process, carbon dioxide which cannot be mixed is difficultly prevented, the air pump 5 pumps the unmixed carbon dioxide into the mixing pipe 4, and then the carbon dioxide is sprayed out through the spray heads 11 communicated with the mixing pipe 4, so that the solubility of the carbon dioxide in the water is improved, the circulating injection of the carbon dioxide can effectively improve the solubility of the carbonated water, the uniform mixing of the carbon dioxide in the sealed box 1 is guaranteed through the rotation of the spray heads 11. Finally, the produced carbonated water is discharged from the bottom carbonated water tube 32.
Refrigeration structure: the water pump 18 draws out the water of seal box 1 lower extreme through refrigeration pipe 17, then after the refrigerator 19 refrigerates, will water discharge to seal box 1 in and continue to react with carbon dioxide for the water in the guarantee seal box 1 is within certain temperature range for carbon dioxide can more easily dissolve in the water.
And (3) an injection structure: the carbonated water pipe 32 injects carbonated water into the injection tank 22 and then into the injection pipe 23, and under the action of pressure, the carbonated water in the injection pipe 23 is discharged into an oil field through the plurality of injection branch pipes 29; the electric push rod 28 acts, and the electric push rod 28 drives the sliding sleeve 27 to move up and down, so that the sliding sleeve 27 drives the injection branch pipes 29 to swing up and down through the L-shaped connecting frame 30, and the injection branch pipes 29 are used for injecting carbonated water into the up and down positions in an oil field.
The automatic control structure comprises: the PLC is provided with a pressure threshold value, the pressure sensor transmits collected pressure data to the PLC, the action of the two flow valves is controlled through the collected pressure threshold value, when the collected pressure data is smaller than the pressure threshold value, the PLC controls the two flow valves to be opened, so that the flow of the water inlet pipe 15 and the air inlet pipe 16 is increased, and when the collected pressure data is larger than or equal to the pressure threshold value, the PLC controls the two flow valves to be closed, so that the pressure in the sealing box 1 is kept constant.
The PLC is provided with a temperature threshold range, the temperature sensor transmits collected temperature data to the PLC, the action of the refrigerator 19 is controlled through the collected temperature threshold range, when the collected temperature data is smaller than the temperature threshold range, the PLC controls the power of the refrigerator 19 to be reduced, so that the temperature in the sealed box 1 is improved, when the collected temperature data is larger than the temperature threshold range, the PLC controls the power of the refrigerator 19 to be increased, so that the temperature in the sealed box 1 is reduced, and when the collected temperature data is within the temperature threshold range, the power of the refrigerator 19 is unchanged, so that the temperature in the sealed box 1 is automatically controlled to be kept constant.
By setting a lower temperature and a higher pressure, the solubility of carbon dioxide in water is improved.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. Circulating CO for petroleum exploitation 2 Oil displacement priming device, its characterized in that: comprises a bottom plate (14), a supporting frame (13), a sealing box (1), a pipe sleeve (12), a water inlet pipe (15), an air inlet pipe (16), a first motor (2), a rotating shaft (3), a first connecting plate (6 a), a second connecting plate (6 b), a mixing pipe (4), an air pump (5), a plurality of spray heads (11) and a first gear7) The inner gear ring (8) and the carbonic acid water pipe (32);
the upper end of the bottom plate (14) is provided with a supporting frame (13), and the lower end of the supporting frame (13) is fixedly connected with the bottom plate (14);
the upper end of the supporting frame (13) is provided with a sealing box (1), and the sealing box (1) is fixedly connected with the supporting frame (13);
the upper end of the sealing box (1) is provided with a pipe sleeve (12), the pipe sleeve (12) is communicated with the sealing box (1), a water inlet pipe (15) and an air inlet pipe (16) are arranged in the pipe sleeve (12), the water inlet pipe (15) and the air inlet pipe (16) are respectively communicated with the sealing box (1), and one end of the air inlet pipe (16) is arranged at the bottom of the sealing box (1);
the first motor (2) is arranged at the upper end of the sealing box (1), and a shell of the first motor (2) is fixedly connected with the sealing box (1);
the rotating shaft (3) is vertically arranged in the sealing box (1), the upper end and the lower end of the rotating shaft (3) are respectively and rotatably connected with the sealing box (1), the upper end of the rotating shaft (3) is fixedly connected with the output shaft of the first motor (2), and the rotating shaft (3) and the output shaft of the first motor (2) are on the same axis;
the first connecting plate (6 a) is horizontally arranged, one end of the first connecting plate (6 a) is fixedly connected with the rotating shaft (3), and the other end of the first connecting plate (6 a) is fixedly connected with the mixing pipe (4);
the second connecting plate (6 b) is arranged below the first connecting plate (6 a), the second connecting plate (6 b) is arranged in parallel with the first connecting plate (6 a), one end of the second connecting plate (6 b) is fixedly connected with the rotating shaft (3), and the other end of the second connecting plate (6 b) is fixedly connected with the mixing pipe (4);
the mixing pipe (4) is arranged in the sealing box (1), an air pump (5) is arranged at the top of the mixing pipe (4), an air inlet of the air pump (5) is communicated with the sealing box (1), and an air outlet of the air pump (5) is communicated with the mixing pipe (4);
the mixing pipe (4) is provided with a plurality of spray heads (11), the spray heads (11) are distributed in a circumferential array, and the spray heads (11) are respectively communicated with the mixing pipe (4);
the mixing pipe (4) is sleeved with a first gear (7), the first gear (7) is arranged between the first connecting plate (6 a) and the second connecting plate (6 b), and the first gear (7) is rotatably connected with the mixing pipe (4);
the inner gear ring (8) is arranged in the sealing box (1), the outer ring of the inner gear ring (8) is fixedly connected with the sealing box (1), the inner gear ring (8) is horizontally arranged, and the inner gear ring (8) is meshed with the first gear (7);
the carbonic acid water pipe (32) is arranged at the lower end of the sealing box (1), and the carbonic acid water pipe (32) is communicated with the sealing box (1);
the device also comprises an injection structure, wherein the injection structure comprises an injection box (22), an injection pipe (23), a second motor (24), a second gear (25), an outer gear (26), a sliding sleeve (27), two swinging structures with the same structure and an electric push rod (28);
the upper end of the injection box (22) is communicated with a carbonic acid water pipe (32);
the injection pipe (23) is vertically arranged at the lower end of the injection box (22), and the upper end of the injection pipe (23) is rotatably connected with the lower end of the injection box (22);
the second motor (24) is arranged in the injection box (22), the shell of the second motor (24) is fixedly connected with the injection box (22), the output shaft of the second motor (24) penetrates out of the injection box (22), the output shaft of the second motor (24) is rotatably connected with the injection box (22), and the output shaft of the second motor (24) is arranged in parallel with the injection pipe (23);
the second gear (25) is sleeved on the output shaft of the second motor (24), and the second gear (25) is fixedly connected with the output shaft of the second motor (24);
the outer gear ring (26) is sleeved on the injection pipe (23), the outer gear ring (26) is fixedly connected with the injection pipe (23), and the outer gear ring (26) is meshed with the second gear (25);
the sliding sleeve (27) is sleeved on the injection pipe (23), and the sliding sleeve (27) is connected with the injection pipe (23) in an up-down sliding manner;
the two swing structures with the same structure are symmetrically arranged, and each swing structure comprises an L-shaped connecting frame (30) and a plurality of injection branch pipes (29);
the injection branch pipes (29) are vertically arranged at one side of the injection pipe (23), the injection branch pipes (29) are communicated with the injection pipe (23), and the injection branch pipes (29) are respectively and rotatably connected with the injection pipe (23);
the vertical part of the L-shaped connecting frame (30) is arranged on a plurality of injection branch pipes (29), the L-shaped connecting frame (30) is rotatably connected with the injection branch pipes (29), and the transverse part of the L-shaped connecting frame (30) is fixedly connected with the sliding sleeve (27);
the electric push rod (28) is vertically arranged on the injection pipe (23), a shell of the electric push rod (28) is fixedly connected with the injection pipe (23), and a piston rod of the electric push rod (28) is fixedly connected with the sliding sleeve (27).
2. A recycle CO for oil recovery according to claim 1 2 Oil displacement priming device, its characterized in that: the refrigerator also comprises a refrigeration structure;
the refrigeration structure comprises a refrigeration pipe (17), a water pump (18) and a refrigerator (19);
one end of the refrigerating pipe (17) is communicated with the lower part of the sealing box (1), and the other end of the refrigerating pipe (17) is communicated with the upper part of the sealing box (1);
a refrigerator (19) is sleeved on the refrigerating pipe (17), and the refrigerator (19) is fixedly connected with the upper end of the bottom plate (14);
the water pump (18) is arranged on the refrigerating pipe (17), and the water pump (18) is fixedly connected with the upper end of the bottom plate (14).
3. A recycle CO for oil production according to claim 2 2 Oil displacement priming device, its characterized in that: the device also comprises a fixing frame;
the fixing frame comprises a vertical frame (20) and a transverse frame (21);
the vertical frame (20) is vertically fixed on the bottom plate (14), and the vertical frame (20) is fixedly connected with the upper end and the lower end of the refrigeration pipe (17);
the transverse frame (21) is transversely arranged, one end of the transverse frame (21) is fixed on the vertical frame (20), and the other end of the transverse frame (21) is fixedly connected with the refrigerating tube (17).
4. A recycle CO for oil recovery according to claim 1 2 Oil displacement priming device, its characterized in that: still include motor cover (9), motor cover (9) are fixed to be located seal box (1) upper end, just motor cover (9) cover is established in first motor (2) outside, logical groove has been seted up on motor cover (9) top surface, be equipped with heat dissipation net (10) in the logical groove, heat dissipation net (10) and motor cover (9) fixed connection.
5. A recycle CO for oil recovery according to claim 1 2 Oil displacement priming device, its characterized in that: the injection box comprises a first motor (24) and is characterized by further comprising a first motor casing (31), wherein the first motor casing (31) is arranged in the injection box (22), the first motor casing (31) is sleeved on the first motor (24), and the first motor casing (31) is fixedly connected with the injection box (22).
6. A recycle CO for oil recovery according to claim 1 or 3 or 4 2 Oil displacement priming device, its characterized in that: also comprises an automatic control structure;
the automatic control structure comprises a pressure sensor, a temperature sensor, two flow valves and a PLC;
the signal acquisition ends of the pressure sensor and the temperature sensor are arranged in the sealing box (1);
one flow valve is arranged on the water inlet pipe (15), and the other flow valve is arranged on the air inlet pipe (16);
the signal input end of the PLC is connected with the pressure sensor and the temperature sensor, and the signal output end of the PLC is connected with the two flow valves and the refrigerator (19).
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