CN113482584A - Circulating CO for oil exploitation2Oil displacement and injection device - Google Patents
Circulating CO for oil exploitation2Oil displacement and injection device Download PDFInfo
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- CN113482584A CN113482584A CN202110970698.XA CN202110970698A CN113482584A CN 113482584 A CN113482584 A CN 113482584A CN 202110970698 A CN202110970698 A CN 202110970698A CN 113482584 A CN113482584 A CN 113482584A
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- seal box
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention relates to a circulating CO for oil exploitation2The oil displacement and injection device comprises a bottom plate, a support frame, a seal 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 nozzles, a first gear, an inner gear ring and a carbonated water pipe; water gets into the seal box through the inlet tube in the pipe cover in, mixes water and carbon dioxide in the seal box, and carbon dioxide gets into the bottom of seal box through the intake pipe in the pipe cover for carbon dioxide melts into aquatic, thereby obtains carbonated water, then discharges from the carbonated water pipe of bottom with the carbonated water of making. In the present invention, carbon dioxide is communicated with the mixing pipeThe shower nozzle discharge, carbon dioxide's circulation injection can effectual improvement carbonic water's solubility, and rotation through the shower nozzle realizes the homogeneous mixing of carbon dioxide in the seal box, and the water in the guarantee seal box can all carry out dissolving of carbon dioxide.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to a circulating CO for oil exploitation2Oil displacement and injection device.
Background
The carbon dioxide gas source in the main oil production area in the east of China is less, but the research of the technology for improving the recovery ratio by injecting carbon dioxide and the field pilot test are not stopped all the time. The application of the carbon dioxide flooding technology in oil fields is more and more, and field tests are carried out in oil fields of Jiangsu, China and China, Daqing, Shengli and the like.
The carbon dioxide flooding technology is a technology for injecting carbon dioxide into an oil layer to improve the oil recovery rate of an oil field; the carbon dioxide does not form a miscible front when it first contacts the formation crude oil, but under the appropriate conditions of pressure, temperature and crude oil composition, the carbon dioxide can form a miscible front. The supercritical fluid will extract heavier hydrocarbons from the crude oil and continually condense the gas displacing the front.
The carbon dioxide is injected mainly by four modes of continuously injecting carbon dioxide gas, injecting carbonated water, alternately injecting water and carbon dioxide gas and simultaneously injecting carbon dioxide and water. The existing equipment can only satisfy the requirement of injecting carbon dioxide in one mode, so that the applicability of the carbon dioxide injection equipment is greatly reduced.
The carbonated water injection is characterized in that: 1. because the carbon dioxide in the water is more easily dissolved in the crude oil, the carbon dioxide in the stratum behind the water injection front edge can be transferred into the residual oil phase, the viscosity of the crude oil is reduced, the oil phase permeability is improved, meanwhile, the carbon dioxide in the carbonated water has the tackifying effect on the water, the fluidity ratio can be improved, and the capillary force at the oil-water phase interface is reduced and the rock wettability visual angle is reduced. The carbon dioxide can be dissolved in the water and the carbonation spread coefficient is several times higher than that of the common water. 2. Because crude oil and carbon dioxide have a deeper 'genetic' relationship than water and carbon dioxide chemically, when carbonated water contacts petroleum, molecules of carbon dioxide are diffused, so that heavy oil films attached to the surface of a rock skeleton are loosened, the oil films are moved finally, and the oil washing efficiency is improved. In summary, the solubility of carbon dioxide in water (i.e., the amount of carbonic acid produced) depends primarily on three factors: 1. temperature of water, 2, pressure of water gas, 3, contact area of water and carbon dioxide.
The existing equipment directly injects carbon dioxide into water in the preparation process of carbonated water, but because the solubility of carbon dioxide and books is low, carbon dioxide cannot be dissolved in time with water, so that a large amount of carbon dioxide needs to be consumed, and carbon dioxide diffuses in the atmosphere to cause pollution to the environment to a certain extent. The carbonated water is extremely unstable in the process of transporting the carbonated water, and the carbonated water is decomposed into carbon dioxide and water at a slightly higher temperature, so that the effect of injecting the carbonated water into an oil field is not ideal.
Disclosure of Invention
Aiming at the problems in the prior art, the technical problems to be solved by the invention are as follows: in the process of preparing carbonated water, a large amount of carbon dioxide is consumed because the 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 and injection device for oil exploitation comprises a bottom plate, a support frame, a seal 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 nozzles, a first gear, an inner gear ring and a carbonated water pipe; the upper end of the bottom plate is provided with a support frame, and the lower end of the support frame is fixedly connected with the bottom plate; the upper end of the support frame is provided with a seal box, and the seal box is fixedly connected with the support frame; the upper end of the seal box is provided with a pipe sleeve, the pipe sleeve is communicated with the seal 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 seal box, and one end of the air inlet pipe is arranged at the bottom of the seal box; the first motor is arranged at the upper end of the seal box, and a shell of the first motor is fixedly connected with the seal box; the rotating shaft is vertically arranged in the seal box, the upper end and the lower end of the rotating shaft are respectively rotatably connected with the seal box, the upper end of the rotating shaft is fixedly connected with an 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 and the first connecting plate are arranged in parallel, 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 seal box, an air pump is arranged at the top of the mixing pipe, an air inlet of the air pump is communicated with the seal box, and an air outlet of the air pump is communicated with the mixing pipe; a plurality of spray heads are arranged on the mixing pipe, are distributed in a circumferential array and 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 seal box, the outer ring of the inner gear ring is fixedly connected with the seal box, the inner gear ring is horizontally arranged, and the inner gear ring is meshed with the first gear; the carbonated water pipe is arranged at the lower end of the seal box and communicated with the seal box.
According to the invention, water enters the sealed box through the water inlet pipe in the pipe sleeve, the water and 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 melted into the water to obtain carbonated water, and then the prepared carbonated water is discharged from the carbonated water pipe at the bottom; then the first motor acts to drive the rotating shaft fixedly connected with the output shaft of the first motor to rotate, the rotating shaft drives the first connecting plate and the second connecting plate fixedly connected with the rotating shaft to rotate, so that the first connecting plate and the second connecting plate drive the mixing pipe fixedly connected with the first connecting plate to rotate, the mixing pipe drives the first gear to rotate on the inner gear ring, so that the plurality of spray heads on the mixing pipe rotate, in the mixing process, carbon dioxide which cannot be mixed is inevitably generated, the air pump pumps the carbon dioxide which cannot be mixed into the mixing pipe, then the carbon dioxide is sprayed out through a nozzle communicated with the mixing pipe, so that the contact area of water and the carbon dioxide is increased, the solubility of the carbonated water can be effectively improved through the circular injection of the carbon dioxide, through the rotation of shower nozzle, realize the homogeneous mixing of carbon dioxide in the seal box, the water in the guarantee seal box can all carry out dissolving of carbon dioxide.
Preferably, the refrigerator also comprises a refrigeration structure; the refrigerating structure comprises a refrigerating pipe, a water pump and a refrigerator; one end of the refrigerating pipe is communicated with the lower part of the seal box, and the other end of the refrigerating pipe is communicated with the upper part of the seal box; the refrigerating pipe is sleeved with a refrigerator, and the refrigerator is fixedly connected with the upper end of the bottom plate; the water pump is arranged on the refrigerating pipe and fixedly connected with the upper end of the bottom plate. The water pump takes out the water of seal box lower extreme through the refrigeration pipe, then after the refrigerator refrigeration, with water discharge to continue to react with carbon dioxide in the seal box, the water of guarantee seal box is within certain temperature range for, carbon dioxide can easily dissolve aquatic more.
Preferably, the device also comprises a fixing frame; the fixed frame comprises a vertical frame and a transverse frame; the vertical frame is vertically fixed on the bottom plate and is 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 pipe is fixed, and the probability of deformation of the refrigerating pipe is effectively reduced.
Preferably, the motor cover is fixedly arranged at the upper end of the seal box, the motor cover is sleeved outside the first motor, the top surface of the motor cover is provided with a through groove, the through groove is internally provided with a heat dissipation net, and the heat dissipation net is fixedly connected with the motor cover. The motor cover plays the guard action to first motor, and the radiator-grid can discharge steam, plays radiating effect.
Preferably, the device also 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 swinging 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, a shell of the second motor is fixedly connected with the injection box, an output shaft of the second motor penetrates out of the injection box, the output shaft of the second motor is rotatably connected with the injection box, and the output shaft of the second motor is parallel to the injection pipe; the second gear is sleeved on an 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 a vertical sliding mode.
The two swing structures with the same structure are symmetrically arranged and comprise a plurality of injection branch pipes and L-shaped connecting frames; 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 plurality of injection branch pipes, the L-shaped connecting frame is rotatably connected with the plurality of injection branch pipes, and the horizontal 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 carbonated water is injected into the injection box by the carbonated water pipe and then enters the injection pipe, and the carbonated water injected into the injection pipe is discharged into the oil field through the injection branch pipes under the action of pressure; 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 plurality of injection branch pipes to swing up and down through the L-shaped connecting frame, and the plurality of injection branch pipes inject carbonated water into the upper position and the lower position in the oil field.
Preferably, the injection box further comprises a second motor casing, the second motor casing is arranged in the injection box, the second motor casing is sleeved on the second motor, and the second motor casing 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 inflow.
Preferably, 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 seal 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 transducer 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 pressure data acquired by the pressure sensor, so that the pressure in the seal box is kept constant; the PLC controls the action of the refrigerator according to the temperature data collected by the temperature sensor, so that the temperature of the seal 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 injected circularly, so that the mixing efficiency of water and carbon dioxide is improved. Water enters the sealed box through the water inlet pipe in the pipe sleeve, the water and 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 melted into the water to obtain carbonated water, and then the prepared carbonated water is discharged from the carbonated water pipe at the bottom; then the first motor acts to drive the rotating shaft fixedly connected with the output shaft of the first motor to rotate, the rotating shaft drives the first connecting plate and the second connecting plate fixedly connected with the rotating shaft to rotate, so that the first connecting plate and the second connecting plate drive the mixing pipe fixedly connected with the first connecting plate to rotate, the mixing pipe drives the first gear to rotate on the inner gear ring, so that the plurality of spray heads on the mixing pipe rotate, in the mixing process, carbon dioxide which cannot be mixed is inevitably generated, the air pump pumps the carbon dioxide which cannot be mixed into the mixing pipe, then the carbon dioxide is sprayed out through a nozzle communicated with the mixing pipe, so that the contact area of water and the carbon dioxide is increased, the solubility of the carbonated water can be effectively improved through the circular injection of the carbon dioxide, through the rotation of shower nozzle, realize the homogeneous mixing of carbon dioxide in the seal box, the water in the guarantee seal box can all carry out dissolving of carbon dioxide.
2. The crude oil in the oil field is mixed with the carbonated water more uniformly. The carbonated water is injected into the injection box by the carbonated water pipe and then enters the injection pipe, and the carbonated water injected into the injection pipe is discharged into the oil field through the injection branch pipes under the action of pressure; 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 plurality of injection branch pipes to swing up and down through the L-shaped connecting frame, and the plurality of injection branch pipes inject carbonated water into the upper position and the lower position in the oil field.
3. The carbon dioxide is prevented from being decomposed into carbon dioxide and water due to the fact that the carbonated water is extremely unstable and the temperature is slightly higher in the transportation process. 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 dissolving amount of carbon dioxide in the carbonated water is greatly improved.
Drawings
Fig. 1 is a perspective view of the entire apparatus of the embodiment.
Fig. 2 is a front sectional view of the integrated device of the embodiment.
Fig. 3 is an exploded view of the components within the enclosure of the embodiment.
Fig. 4 is a schematic structural view of the fixing frame according to the embodiment.
Fig. 5 is a schematic structural diagram of an implantation structure according to an embodiment.
In the figure, 1-a sealed box, 2-a first motor, 3-a rotating shaft, 4-a mixing pipe, 5-an air pump, 6 a-a first connecting plate, 6 b-a second connecting plate, 7-a first gear, 8-an inner gear ring, 9-a motor cover, 10-a heat dissipation net, 11-a spray head, 12-a sleeve, 13-a support frame, 14-a bottom plate, 15-a water inlet pipe, 16-an air inlet pipe, 17-a refrigerating pipe, 18-a water pump, 19-a refrigerator, 20-a vertical frame, 21-a horizontal frame, 22-an injection box, 23-an injection pipe, 24-a second motor, 25-a second gear, 26-an outer gear ring, 27-a sliding sleeve, 28-an electric push rod, 29-an injection branch pipe, 30-L-type connecting frame, 31-a second motor shell, 32-carbonated water pipe.
Detailed Description
The present invention is described in further detail below.
In the present invention, 'front', 'rear', 'left', 'right', 'up', 'down' all refer to the orientation in fig. 1, wherein 'front' refers to being out with respect to the paper in fig. 1 and 'rear' refers to being in fig. 1. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-5, one embodiment of the present invention is provided: circulating CO for oil exploitation2The oil displacement and 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 nozzles 11, a first gear 7, an inner gear ring 8 and a carbonated water pipe 7; the upper end of the bottom plate 14 is provided with a support frame 13, and the lower end of the support frame 13 is fixedly connected with the bottom plate 14; the upper end of the support frame 13 is provided with a seal box 1, and the seal box 1 is fixedly connected with the support frame 13; the upper end of the seal box 1 is provided with a pipe sleeve 12, the pipe sleeve 12 is communicated with the seal 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 seal box 1, and one end of the air inlet pipe 16 is arranged at the bottom of the seal box 1; the first motor 2 is arranged at the upper end of the seal box 1, and a shell of the first motor 2 is fixedly connected with the seal box 1; the rotating shaft 3 is vertically arranged in the seal box 1, the upper end and the lower end of the rotating shaft 3 are respectively rotatably connected with the seal box 1, the upper end of the rotating shaft 3 is fixedly connected with an 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 seal 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 seal box 1, and an air outlet of the air pump 5 is communicated with the mixing pipe 4; a plurality of spray heads 11 are arranged on the mixing pipe 4, the spray heads 11 are distributed in a circumferential array manner, and the spray heads 11 are respectively mixed with the mixtureThe pipe 4 is communicated; 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 seal box 1, the outer ring of the inner gear ring 8 is fixedly connected with the seal box 1, the inner gear ring 8 is horizontally arranged, and the inner gear ring 8 is meshed with the first gear 7; the carbonated water pipe 7 is arranged at the lower end of the seal box 1, and the carbonated water pipe 7 is communicated with the seal box 1.
In specific implementation, water enters the sealed box 1 through the water inlet pipe 15 in the pipe sleeve 12, the water and 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 dissolved in the water to obtain carbonated water, and then the prepared carbonated water is discharged from the carbonated water pipe 7 at the bottom; then the first motor 2 acts, the first motor 2 drives the rotating shaft 3 fixedly connected with the output shaft thereof to rotate, the rotating shaft 3 drives the first connecting plate 6a and the second connecting plate 6b fixedly connected with the rotating shaft to rotate, so that the first connecting plate 6a and the second connecting plate 6b drive the mixing pipe 4 fixedly connected with the rotating shaft to rotate, the mixing pipe 4 drives the first gear 7 to rotate on the inner gear ring 8, so that the plurality of nozzles 11 on the mixing pipe 4 rotate, carbon dioxide which cannot be mixed is inevitably generated in the mixing process, the air pump 5 pumps the carbon dioxide which cannot be mixed into the mixing pipe 4, then the carbon dioxide is sprayed out through the nozzles 11 communicated with the mixing pipe 4, thereby the contact area of water and the carbon dioxide is increased, the carbon dioxide is circularly injected to effectively improve the solubility of the carbonated water, and the carbon dioxide in the sealing box 1 is uniformly mixed through the rotation of the nozzles 11, the water in the sealing box 1 can be ensured to be dissolved with carbon dioxide.
In specific implementation, in order to ensure the sealing performance of the seal box 1, sealing measures should be added at each communication position with the seal box 1, such as adding a seal ring and a seal gasket at the communication position, to prevent leakage of carbon dioxide.
During the concrete implementation, for the operation that can last in the guarantee seal box 1, set up a transfer station on carbonic acid water pipe 7, send the carbonated water after mixing to the transfer station in and store, when needing to use, directly take out from the transfer station.
Further, the refrigerator also comprises a refrigeration structure; the refrigerating structure comprises a refrigerating 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 seal box 1, and the other end of the refrigerating pipe 17 is communicated with the upper part of the seal 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. During 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 refrigeration by the refrigerator 19, the water is discharged into the seal box 1 to continue to react with carbon dioxide, so that the water in the seal box 1 is ensured to be within a certain temperature range, and the carbon dioxide can be dissolved in the water more easily.
Further, 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 pipe 17. The refrigerating pipe 17 is fixed, and the probability of deformation of the refrigerating pipe 17 is effectively reduced.
Further, still include motor cover 9, motor cover 9 is fixed to be located 1 upper end of seal box, just motor cover 9 cover is established in the 2 outsides of first motor, logical groove has been seted up to motor cover 9 top surface, it is equipped with radiator-grid 10 to lead to the inslot, radiator-grid 10 and motor cover 9 fixed connection. The motor cover 9 plays a role in protecting the first motor 2, and the heat dissipation net 10 can discharge hot air to play a role in heat dissipation.
Further, the device 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 the carbonic acid water pipe 7; 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, a shell of the second motor 24 is fixedly connected with the injection box 22, an 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 a vertical 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 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 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. In the concrete implementation, the carbonated water pipe 7 injects the carbonated water into the injection box 22 and then enters the injection pipe 23, and the carbonated water in the injection pipe 23 is discharged into the oil field through the plurality of injection branch pipes 29 under the action of pressure; the electric push rod 28 acts, the electric push rod 28 drives the sliding sleeve 27 to move up and down, so that the sliding sleeve 27 drives the plurality of injection branch pipes 29 to swing up and down through the L-shaped connecting frame 30, and the plurality of injection branch pipes 29 inject carbonated water into the upper position and the lower position in the oil field.
Further, still include second motor casing 31, second motor casing 31 is located and is annotated in case 22, second motor casing 31 cover is located on second motor 24, just second motor casing 31 and injection case 22 fixed connection. 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 automatic control 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 seal 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 transducer 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 action of the two flow valves according to pressure data acquired by the pressure sensor, so that the pressure in the seal box 1 is kept constant; the PLC controls the action of the refrigerator 19 according to the temperature data collected by the temperature sensor, so that the temperature of the seal box 1 is kept constant, and automatic control is realized.
The circulating CO for oil exploitation2The working principle of the oil displacement and injection device is as follows:
water enters the seal box 1 through a water inlet pipe 15 in the pipe sleeve 12, the water and carbon dioxide are mixed in the seal box 1, the carbon dioxide enters the bottom of the seal box 1 through an air inlet pipe 16 in the pipe sleeve 12, 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 to rotate, 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 inner gear ring 8, the plurality of spray heads 11 on the mixing pipe 4 rotate, carbon dioxide which cannot be mixed is inevitably generated in the mixing process, the air pump 5 pumps the carbon dioxide which cannot be mixed into the mixing pipe 4, then carbon dioxide is sprayed out through the spray head 11 communicated with the mixing pipe 4, so that the solubility of carbon dioxide in water is improved, the solubility of carbonated water can be effectively improved through the circular injection of carbon dioxide, the carbon dioxide is uniformly mixed in the seal box 1 through the rotation of the spray head 11, and the water in the seal box 1 can be dissolved by the carbon dioxide. Finally, the produced carbonated water is discharged from the carbonated water pipe 7 at the bottom.
The refrigeration structure is as follows: water pump 18 takes out the water of seal box 1 lower extreme through refrigeration pipe 17, then after the refrigeration of refrigerator 19, discharges water into in seal box 1 and continues to react with carbon dioxide, ensures that the water in the seal box 1 is within certain temperature range for, carbon dioxide can more easily dissolve in the water.
And (3) injecting a structure: the carbonated water pipe 7 injects the carbonated water into the injection tank 22 and then enters the injection pipe 23, and the carbonated water in the injection pipe 23 is discharged into the oil field through the plurality of injection branch pipes 29 under the action of pressure; the electric push rod 28 acts, the electric push rod 28 drives the sliding sleeve 27 to move up and down, so that the sliding sleeve 27 drives the plurality of injection branch pipes 29 to swing up and down through the L-shaped connecting frame 30, and the plurality of injection branch pipes 29 inject carbonated water into the upper position and the lower position in the oil field.
The automatic control structure is as follows: 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 are smaller than the pressure threshold value, the PLC controls the two flow valves to be opened, the flow of the water inlet pipe 15 and the flow of the air inlet pipe 16 are increased, when the collected pressure data are larger than or equal to the pressure threshold value, the PLC controls the two flow valves to be closed, and the pressure in the sealing box 1 is kept constant.
Be equipped with the temperature threshold value scope among the PLC, temperature sensor transmits the temperature data who gathers to PLC in, and the action through the temperature threshold value scope control refrigerator 19 of gathering, when the temperature data who gathers is less than the temperature threshold value scope, PLC control refrigerator 19's power reduces, thereby promote the temperature in seal box 1, when the temperature data who gathers is greater than the temperature threshold value scope, PLC control refrigerator 19's power increase, thereby reduce the temperature in seal box 1, when the temperature data who gathers is within the temperature threshold value scope, the power of refrigerator 19 is unchangeable, thereby the temperature in the automatic control seal box 1 keeps invariable.
The solubility of carbon dioxide in water is improved by setting a lower temperature and a higher pressure.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. Circulating CO for oil exploitation2Displacement of reservoir oil priming device, its characterized in that: the 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 carbonated water pipe (7);
the upper end of the bottom plate (14) is provided with a support frame (13), and the lower end of the support frame (13) is fixedly connected with the bottom plate (14);
the upper end of the support frame (13) is provided with a seal box (1), and the seal box (1) is fixedly connected with the support frame (13);
the upper end of the seal box (1) is provided with a pipe sleeve (12), the pipe sleeve (12) is communicated with the seal 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 seal box (1), and one end of the air inlet pipe (16) is arranged at the bottom of the seal box (1);
the first motor (2) is arranged at the upper end of the seal box (1), and a shell of the first motor (2) is fixedly connected with the seal box (1);
the rotating shaft (3) is vertically arranged in the seal box (1), the upper end and the lower end of the rotating shaft (3) are respectively rotatably connected with the seal box (1), the upper end of the rotating shaft (3) is fixedly connected with an 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) and the first connecting plate (6a) are arranged in parallel, 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 seal 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 seal box (1), and an air outlet of the air pump (5) is communicated with the mixing pipe (4);
a plurality of spray heads (11) are arranged on the mixing pipe (4), the spray heads (11) are distributed in a circumferential array, and the spray heads (11) are respectively communicated with the mixing pipe (4);
a first gear (7) is sleeved on the mixing pipe (4), the first gear (7) is arranged between the first connecting plate (6a) and the second connecting plate (6b), and the first gear (7) is rotatably connected with the mixing pipe (4);
the inner gear ring (8) is arranged in the seal box (1), the outer ring of the inner gear ring (8) is fixedly connected with the seal box (1), the inner gear ring (8) is horizontally arranged, and the inner gear ring (8) is meshed with the first gear (7);
the lower end of the seal box (1) is arranged on the carbonated water pipe (7), and the carbonated water pipe (7) is communicated with the seal box (1).
2. Circulating CO for oil extraction according to claim 12Displacement of reservoir oil priming device, its characterized in that: also includes a refrigeration structure;
the refrigerating structure comprises a refrigerating 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 seal box (1), and the other end of the refrigerating pipe (17) is communicated with the upper part of the seal 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. Circulating CO for oil extraction according to claim 22Oil displacement and injection deviceThe method is characterized in that: the device also comprises a fixed frame;
the fixed 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 pipe (17).
4. Circulating CO for oil extraction according to claim 12Displacement of reservoir oil priming device, its characterized in that: still include motor cover (9), fixed seal box (1) upper end of locating of motor cover (9), just motor cover (9) cover is established in the first motor (2) outside, logical groove has been seted up to motor cover (9) top surface, it is equipped with radiator-grid (10) to lead to the inslot, radiator-grid (10) and motor cover (9) fixed connection.
5. Circulating CO for oil extraction according to claim 12Displacement of reservoir oil priming device, its characterized in that: also includes 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 swinging 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 (7);
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), a shell of the second motor (24) is fixedly connected with the injection box (22), an 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 a vertical 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 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 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), 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).
6. Circulating CO for oil extraction according to claim 52Displacement of reservoir oil priming device, its characterized in that: still include second motor casing (31), in injection case (22) was located in second motor casing (31), second motor casing (31) cover was located on second motor (24), just second motor casing (31) and injection case (22) fixed connection.
7. Circulating CO for oil extraction according to any of claims 3-52Displacement of reservoir oil priming device, its characterized in that: the automatic control 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 seal 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 transducer 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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| CN202110970698.XA CN113482584B (en) | 2021-08-23 | 2021-08-23 | Circulating CO for petroleum exploitation 2 Oil displacement and liquid injection device |
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| CN202110970698.XA CN113482584B (en) | 2021-08-23 | 2021-08-23 | Circulating CO for petroleum exploitation 2 Oil displacement and liquid injection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199243A (en) * | 2022-06-09 | 2022-10-18 | 中国石油大学(华东) | Tight oil reservoir is opened and is adopted aqueous vapor gas injection device in turn |
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| CN115199243A (en) * | 2022-06-09 | 2022-10-18 | 中国石油大学(华东) | Tight oil reservoir is opened and is adopted aqueous vapor gas injection device in turn |
| CN115199243B (en) * | 2022-06-09 | 2023-09-22 | 中国石油大学(华东) | Water-gas alternate gas injection device for dense oil reservoir exploitation |
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