CN115263258A - Reduce calorific loss's viscous crude heat and adopt gas injection device - Google Patents
Reduce calorific loss's viscous crude heat and adopt gas injection device Download PDFInfo
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- CN115263258A CN115263258A CN202211133776.1A CN202211133776A CN115263258A CN 115263258 A CN115263258 A CN 115263258A CN 202211133776 A CN202211133776 A CN 202211133776A CN 115263258 A CN115263258 A CN 115263258A
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- 238000002347 injection Methods 0.000 title claims abstract description 38
- 239000007924 injection Substances 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 63
- 239000003921 oil Substances 0.000 claims description 60
- 230000000903 blocking effect Effects 0.000 claims description 31
- 238000005192 partition Methods 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 239000013013 elastic material Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 3
- 238000010168 coupling process Methods 0.000 claims 3
- 238000005859 coupling reaction Methods 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 claims 3
- 239000000295 fuel oil Substances 0.000 claims 2
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 15
- 238000000926 separation method Methods 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 239000003208 petroleum Substances 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002791 soaking 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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Abstract
The invention relates to the technical field of thickened oil thermal recovery, in particular to a thickened oil thermal recovery gas injection device for reducing heat loss. The perpendicular line and the unable coincidence of pit shaft central line of first shutoff piece and second shutoff piece, high pressure can make the shutoff piece take place the slope and drop even, and one-way gas injection, gas injection efficiency is slow, does not strengthen the mobility of viscous crude around the gasbag, and during gasbag and pit shaft contact, can mix with the viscous crude between the two, when evaporation chamber water level reduced, the produced heat in combustion chamber bottom was not utilized. The invention provides a thickened oil hot-application gas injection device for reducing heat loss. The invention replaces the original one-way gas injection by the two-way gas injection, reduces the use amount of steam, reduces heat loss, shortens the gas injection time, realizes better steam injection effect, supports the plugging piece by the sliding rod, and avoids the situations of inclination, separation and the like of the plugging piece caused by the increase of the pressure of the target layer section.
Description
Technical Field
The invention relates to the technical field of thickened oil thermal recovery, in particular to a thickened oil thermal recovery gas injection device for reducing heat loss.
Background
Petroleum is used as a strategic resource, the exploitation process is very complex, particularly thick oil in an oil layer is exploited, at present, the thick oil is exploited by a thermal exploitation technology because the viscosity is high and is greatly changed by temperature, the fluidity of the thick oil is increased by injecting steam into the thick oil, and after the steam injection is finished, the thick oil is exploited by procedures such as well stewing and the like.
In the prior art, for example, a patent with publication number CN114658404A discloses a thick oil thermal recovery steam injection device and method, the thick oil thermal recovery steam injection device includes a first plugging piece, a second plugging piece and a steam generation mechanism; steam generation mechanism includes casing, a plurality of baffle, water injection pipe, a plurality of water valve, annotates the air pipe, a plurality of air valve, annotates gas pipe, a plurality of gas valve, steam pipe and ignition, and the device has solved the calorific loss that long distance transportation caused, and pit shaft problem such as with high costs.
However, this device has the following problems:
1. the device first shutoff piece and second shutoff piece all rely on the drilling rod to go into the pit shaft in, the drilling rod is assisting its two in-process that descends, can't guarantee first shutoff piece and second shutoff piece's plumb line and pit shaft central line coincidence, increased the difficulty for subsequent gasbag shutoff.
2. After the first plugging piece and the second plugging piece are put into the shaft, the drill rod can be taken out, the plugging piece is supported only by the air bag, the air pressure is increased due to the fact that steam is injected into the target interval, and the plugging piece can incline or even fall under the high-pressure condition.
3. The device adopts one-way gas injection, and the gas injection efficiency is low.
4. The device does not strengthen the mobility of viscous oil around the gasbag when the gasbag carries out the shutoff to the viscous oil in target interval for when gasbag and pit shaft contact, can mix with the viscous oil between the two, influence the sealed of target interval.
5. Although the combustion chamber and the evaporation chamber are distributed in a staggered manner to realize heat exchange between the combustion chamber and the evaporation chamber, when the water level of the evaporation chamber is reduced, the heat generated at the bottom of the combustion chamber is not utilized.
Disclosure of Invention
The invention discloses a thickened oil hot-application gas injection device with a bidirectional gas injection function and a heat loss reduction function, and aims to overcome the defects that a first blocking piece and a second blocking piece cannot be horizontally placed, the blocking pieces incline or even fall off under the high-pressure condition, the one-way gas injection efficiency is low, the fluidity of thickened oil around an air bag is not enhanced, thickened oil is mixed between the air bag and a shaft when the air bag is in contact with the shaft, and the heat generated at the bottom of a combustion chamber is not utilized when the water level of an evaporation chamber is reduced.
The technical scheme is as follows: a thickened oil thermal-adoption gas injection device for reducing heat loss comprises a support shell, wherein a steam transmission cavity is arranged in the support shell, a driving assembly is arranged in the steam transmission cavity, a screw rod connected with the driving assembly through gear transmission is rotatably arranged in the support shell, a slide rod is matched with a screw thread, an annular cylinder cavity is arranged in the slide rod, an isolation disc fixedly connected with the slide rod is arranged in the support shell in a sliding manner, two plugging pieces are symmetrically arranged, one plugging piece is connected with the slide rod in a sliding manner, the other plugging piece is fixedly connected with the slide rod, the plugging piece connected with the slide rod in a sliding manner is fixedly connected with the support shell, a gas pressure cavity, a cylindrical cavity, a first annular cavity, a first connecting through hole, a second annular cavity and a gas vent are arranged in the plugging piece, the first connecting through hole is communicated with the first annular cavity, the second annular cavity is communicated with the gas vent, a first gas guide pipe is arranged on the support shell, a steam production mechanism for generating steam injected by thickened oil is arranged on the support shell, a semi-cylindrical rod is fixedly connected with the isolation disc, the semi-annular cylinder rod is respectively connected with the isolation disc and the isolation disc, the semi-annular cylinder component, and the semi-annular cylinder rod is communicated with the second gas guide pipe in the second gas guide pipe, and the second annular cylinder correction cavity, and the isolation disc, and the second gas guide pipe is communicated with the isolation disc, and the second annular cylinder correction component;
the plugging piece is internally provided with an air pressure cavity, a cylindrical cavity, a first annular cavity, a first connecting through hole, a second annular cavity and an air hole, the air pressure cavity is communicated with the first annular cavity through the first connecting through hole, the second annular cavity is communicated with the air hole, and the correcting assembly is communicated with the second annular cavity; wherein, correct the subassembly including fixed pipe, fixed pipe circumference sets up in the atmospheric pressure intracavity, fixed pipe one end and second annular cavity intercommunication, and the fixed pipe other end forms sealedly with the shutoff piece, and the intercommunication has the flexible pipe of symmetry on the fixed pipe, and the cylindricality cavity slides in and is provided with the bracing piece with flexible pipe intercommunication, and the one end that flexible pipe was kept away from to the bracing piece is provided with the exhaust hole.
Preferably, steam production mechanism is including having the reaction casing, and the reaction casing sets up in the supporting shell, and in first air duct embedding reaction casing, be provided with the combustion chamber in the reaction casing, the combustion intracavity is provided with the ignition, and the ignition is connected with control terminal electricity, forms the steam chamber between reaction casing and the supporting shell, and the steam chamber passes through-hole and steam transmission cavity intercommunication, and the combustion chamber intercommunication has gas pipe and air hose, and the steam chamber intercommunication has the inlet tube.
Preferably, the water inlet of the water inlet pipe is positioned at the lower part of the steam cavity.
Preferably, the sealing assembly comprises a sealing ring, the sliding rod is sleeved with the sealing ring matched with the isolation disc, the sliding rod is fixedly connected with a sealing plate, the sealing plate is provided with an air guide hole for communicating the steam transfer cavity with the annular cylinder cavity, and the sealing ring and the sealing plate are connected with the semi-cylindrical rod in a sliding mode.
Preferably, the sealing plate is arranged to be frustum-shaped, and the lower side surface of the sealing ring is arranged to be an arc-shaped surface matched with the sealing plate.
Preferably, the material of the sealing ring is an elastic material.
Preferably, the blocking piece is further provided with a blocking component used for blocking a target layer section, the blocking component and the correction component are matched to be used for supporting the blocking piece, a control terminal is arranged on the supporting shell, the blocking component comprises an air pump, the air pump is arranged in the blocking piece and communicated with the first annular cavity through a through hole, a first electromagnetic valve is arranged in the first connecting through hole, a second electromagnetic valve is arranged in the second connecting through hole, an air bag communicated with the second connecting through hole is arranged on the outer side of the blocking piece, a pressure sensor is arranged in the first annular cavity, and the first electromagnetic valve, the second electromagnetic valve and the pressure sensor are electrically connected with the control terminal.
Preferably, the detection assembly comprises a connecting pipe, the connecting pipe is circumferentially arranged in the plugging piece and communicated with the first annular cavity, a piston disc is arranged in the connecting pipe in a sliding manner, a switch electrically connected with the control terminal is arranged in the connecting pipe, a guide rod fixedly connected with the piston disc is arranged on the connecting pipe in a sliding manner, a spring is fixedly connected between the piston disc and the connecting pipe and sleeved on the guide rod, and a plugging disc for plugging the air holes is fixedly connected to one end, far away from the piston disc, of the guide rod.
Preferably, the driving assembly (2), the partition assembly (12) and the detection assembly (13) are electrically connected with the control terminal.
Compared with the prior art, the device has the advantages that horizontal calibration is carried out after the plugging piece is placed through the correction assembly, the target interval is better plugged for the two subsequent partition assemblies, the plugging piece is supported through the sliding rod, the situation that the plugging piece is inclined and separated due to the increase of the pressure of the target interval is avoided, the better plugging effect of the target interval is realized, the original one-way gas injection is replaced through the two-way gas injection, the using amount of steam is reduced, the heat loss is reduced, the gas injection time is shortened, the better steam injection effect is realized, the steam is discharged to the outer side of the gas bag through the gas discharge hole, the liquidity of the surrounding oil is increased, the gas bag pushes away the surrounding oil more easily in the contact process of the gas bag and the inner wall of the shaft, after the gas bag is in contact with the inner wall of the shaft, the oil hardly remains between the gas bag and the inner wall of the shaft, the better plugging effect of the target interval is realized, the heat overflow is avoided, the heat loss is reduced, the reaction shell is surrounded through the water in the steam cavity, and the heat generated by the gas is fully utilized.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a partial sectional view of the three-dimensional structure of the present invention.
Fig. 3 is an enlarged schematic perspective view of the invention at a.
Fig. 4 is a partial sectional view of a three-dimensional structure of a steam generating mechanism of the present invention.
Fig. 5 is a perspective partial sectional view of the seal assembly of the present invention.
Figure 6 is a partial cross-sectional view of a three-dimensional structure of an orthotic assembly according to the invention.
Fig. 7 is an enlarged schematic perspective view of the invention B.
Figure 8 is a partial cross-sectional view of another alternative orthotic assembly according to the invention.
Fig. 9 is an enlarged perspective partial sectional view of the partition assembly of the present invention.
Fig. 10 is an enlarged perspective view of the present invention at C.
Wherein the figures include the following reference numerals: 1-supporting shell, 101-steam transfer cavity, 2-driving component, 3-screw rod, 4-sliding rod, 401-annular cylinder cavity, 5-isolation disc, 6-blocking piece, 601-pneumatic cavity, 602-cylindrical cavity, 603-first annular cavity, 604-first connecting through hole, 605-second connecting through hole, 606-second annular cavity, 607-vent hole, 7-first air duct, 8-second air duct, 9-steam production mechanism, 901-reaction shell, 9011-combustion cavity, 902-steam cavity, 903-gas pipe, 904-air pipe, 905-water inlet pipe, 10-sealing component, 1001-sealing ring, 1002-sealing plate, 1003-air guide hole, 11-correction component, 1101-fixed pipe, 1102-telescopic pipe, 1103-support rod, 1104-exhaust hole, 12-blocking component, 1201-air pump, first electromagnetic valve, 1203-second electromagnetic valve, 1301, 1204-air bag, 1205-pressure sensor, 13-detection component, piston-connecting pipe, 1303-opening and closing spring, 1304-sealing disc, 1306.
Detailed Description
The following detailed description will be provided to explain the spirit of the present invention by way of illustration and description, and it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as embodied and broadly described herein, and the switch described below is merely a trigger for turning off the air pump.
Example 1
A gas injection device for thickened oil heat application for reducing heat loss is disclosed, as shown in figures 1-3, and comprises a support housing 1, a steam transfer cavity 101 is arranged at the top in the support housing 1, a drive component 2 is arranged in the steam transfer cavity 101, a screw rod 3 connected with the drive component 2 through gear transmission is rotatably arranged in the support housing 1, a slide rod 4 is in threaded fit with the screw rod 3, an annular cylinder cavity 401 is arranged in the slide rod 4, the slide rod 4 is made of aluminum alloy material, the aluminum alloy has good thermal conductivity and higher hardness than pure aluminum, when steam enters the annular cylinder cavity 401, partial heat of the steam is transferred to a target interval through the slide rod 4, the temperature rise of the target interval is assisted, the flowability of thickened oil is increased, a better steam injection effect is realized, an isolation disc 5 fixedly connected with the upper end of the slide rod 4 is slidably arranged in the support housing 1, two plugging pieces 6 are symmetrically arranged, an upper plugging piece 6 is connected with a slide bar 4 in a sliding way, a lower plugging piece 6 is fixedly connected with the slide bar 4, the upper plugging piece 6 is fixedly connected with a support shell 1 through a fixing block, a first air duct 7 is arranged on the support shell 1, a second air duct 8 is arranged in the lower plugging piece 6, a steam production mechanism 9 for generating steam injected by thick oil is arranged on the support shell 1, a sealing component 10 for steam partition is arranged on the lower side of a separation disc 5, a semi-cylindrical rod is fixedly connected on the left side of the support shell 1 and is respectively connected with the separation disc 5 and the sealing component 10 in a sliding way, a correcting component 11 for supporting the shell 1 to be aligned is arranged in the plugging piece 6, the support shell 1 and the two plugging pieces 6 are ensured to be positioned in the middle of a shaft, and the target layer sections are better plugged by two subsequent plugging components 12, in the process that the correction assembly 11 corrects the support shell 1, the correction assembly 11 injects steam around two plugging pieces 6, the flowability of crude oil around the two plugging pieces 6 is increased, the sealing property between the partition assembly 12 and a shaft is enhanced, the correction assembly 11 is communicated with the plugging pieces 6, the first air duct 7 communicates the upper correction assembly 11 with the steam transmission cavity 101, the second air duct 8 communicates the lower correction assembly 11 with the annular cylinder cavity 401, the plugging piece 6 is provided with a partition assembly 12 for partitioning a target interval, the partition assembly 12 is matched with the correction assembly 11 to support the plugging pieces 6, the correction assembly 11 is used for assisting the partition assembly 12 to partition the target interval, a detection assembly 13 is arranged in the plugging piece 6, the detection assembly 13 is matched with the partition assembly 12 to communicate the steam with the target interval, the detection assembly 13 opens the plugging piece 6, the steam in the plugging piece 6 enters the target interval, steam is injected into thick oil of the target interval, the flowability of the thick oil is increased, the subsequent extraction is facilitated, an oil control terminal is arranged on the support shell 1, the driving assembly 2, and the partition assembly 12 is electrically connected with the detection assembly 13.
When thick oil in a medium and small oil field needs to be steamed, an operator firstly determines the thickness of thick oil in the medium and small oil field, namely the thickness of a target layer section, puts the device into a shaft through other hoisting equipment and places the device above the target layer section, an initial position separation disc 5 is positioned above a steam transmission cavity 101, two plugging pieces 6 are adjacent, then the operator starts a driving assembly 2 through a control terminal, the driving assembly 2 drives a screw rod 3 to rotate, the separation disc 5 is limited by a semi-cylindrical rod and the separation disc 5 is fixedly connected with a sliding rod 4, therefore, under the driving of the screw rod 3, the sliding rod 4 drives the separation disc 5 and a plugging piece 6 below the separation disc to move downwards, when the plugging piece 6 below the target layer section moves below the target layer section, the operator stops the driving assembly 2 through the control terminal, at the moment, the target layer section is positioned between the two plugging pieces 6, then the operator starts a steam production mechanism 9 through the control terminal to generate steam, the generated steam enters the steam transmission cavity 101, a part of the steam transmission cavity 101 enters a correction assembly 11 and a steam correction assembly 1 in the casing, the steam correction assembly 1 drives the steam transmission cavity to correct and a steam transmission cavity 1, the steam transmission cavity to support the casing 11, and a steam transmission mechanism 11, the casing 11 is started, the steam transmission mechanism 12, the straightening assembly 11 injects steam around the two plugging pieces 6, so that the mobility of crude oil around the two plugging pieces 6 is increased, and the sealing performance between the partition assembly 12 and the shaft is enhanced.
After the support shell 1 is corrected, an operator starts the partition component 12 through the control terminal to block a target interval, meanwhile, the partition component 12 blocks the correction component 11, the correction component 11 stops injecting steam around the two blocking pieces 6, after the target interval is blocked, the operator starts the partition component 12 through the control terminal to open the detection component 13, the detection component 13 opens the blocking pieces 6, because the steam in the two blocking pieces 6 is in a high-pressure state, after the blocking pieces 6 are opened, the petroleum cannot enter the second annular cavity 606, after the blocking pieces 6 are opened, the operator closes the partition component 12 through the control terminal, the steam in the blocking pieces 6 enters the target interval, the steam is injected into the thick oil in the target interval, the flowability of the thick oil is increased, the subsequent petroleum is convenient to be extracted, the original one-way gas injection is replaced by the two-way gas injection, the use amount of the steam is reduced, the heat loss is reduced, the gas injection time is shortened, the better steam injection effect is achieved, the blocking pieces 6 are supported through the sliding rods 4, the increase of the pressure of the target interval is avoided, and the better blocking piece 6 is blocked, and the better blocking effect of the blocking of the target interval is achieved.
In the steam injection process, the sealing performance between the sealing component 10 and the supporting shell 1 is enhanced, steam overflow is prevented, meanwhile, steam is prevented from entering the driving component 2 in the steam transmission cavity 101, normal operation of the driving component 2 is guaranteed, meanwhile, the sliding rod 4 is made of an aluminum alloy material, the aluminum alloy has good thermal conductivity and higher hardness than pure aluminum, when steam enters the annular cylinder cavity 401, partial heat of the steam is transmitted to a target interval through the sliding rod 4, temperature increase of the target interval is assisted, fluidity of thick oil is increased, a better steam injection effect is achieved, after steam injection of the target interval is completed, an operator starts the partition component 12 through the control terminal to reset the detection component 13, the detection component 13 blocks the air holes 607, the correction component 11 and the partition component 12 are connected through the control terminal, after the correction component 11 is reset, the operator closes the steam production mechanism 9 through the control terminal, steam injection into the target interval is stopped, the drive component 2 is started through the control terminal to reset, the blockage 6 is plugged through the lifting equipment, after the device is reset, the operator takes out the device from a lifting device, and extracts subsequent oil from a well.
Example 2
On the basis of embodiment 1, as shown in fig. 1, an air pressure cavity 601, a cylindrical cavity 602, a first annular cavity 603, a first connecting through hole 604, a second connecting through hole 605, a second annular cavity 606 and an air hole 607 are arranged in the sealing member 6, the first connecting through hole 604 communicates the air pressure cavity 601 with the first annular cavity 603, the second annular cavity 606 communicates with the air hole 607, and the correcting component 11 communicates with the second annular cavity 606.
As shown in fig. 4, the steam production mechanism 9 includes a reaction housing 901, the reaction housing 901 is disposed at the lower side of the support housing 1, the first air duct 7 is embedded in the reaction housing 901, a combustion chamber 9011 is disposed in the reaction housing 901, an ignition part is disposed in the combustion chamber 9011, the ignition part is electrically connected to the control terminal, a steam chamber 902 is formed between the reaction housing 901 and the support housing 1, the steam chamber 902 is communicated with the steam transfer chamber 101 through a through hole, the combustion chamber 9011 is communicated with a gas pipe 903 and an air pipe 904, the steam chamber 902 is communicated with a water inlet pipe 905, a water inlet of the water inlet pipe 905 is located at the lower part of the steam chamber 902, water is injected below the steam chamber 902, contact between water and high-temperature water above water is avoided, the higher water density is smaller, the lower density of the low-density liquid is located above the high-density liquid, therefore, the steam production efficiency is higher, and a better steam production effect is achieved by injecting water below.
As shown in fig. 5, the sealing assembly 10 includes a sealing ring 1001, a sealing ring 1001 matched with the separation disc 5 is sleeved on the upper portion of the sliding rod 4, a sealing plate 1002 is welded on the upper portion of the sliding rod 4, the sealing plate 1002 is provided with an air guide hole 1003 communicating the steam transfer cavity 101 with the annular cylinder cavity 401, the sealing plate 1002 is in a frustum shape, the lower side surface of the sealing ring 1001 is set to be an arc-shaped surface matched with the sealing plate 1002, the sealing ring 1001 is made of an elastic material, the lower surface of the sealing ring 1001 can expand outwards when being pressurized, the pressure between the sealing ring 1001 and the supporting shell 1 is increased, steam overflow is prevented, a better sealing effect is achieved, and the sealing ring 1001 and the sealing plate 1002 are connected with the semi-cylindrical rod in a sliding manner.
As shown in fig. 6-8, the straightening assembly 11 includes three fixed pipes 1101, three fixed pipes 1101 are circumferentially arranged, three fixed pipes 1101 are in the air pressure chamber 601, one end of each fixed pipe 1101 close to the second annular cavity 606 is communicated with the second annular cavity 606, one end of each fixed pipe 1101 far away from the second annular cavity 606 is sealed with the plugging member 6, symmetrical telescopic pipes 1102 are communicated with the fixed pipes 1101, supporting rods 1103 communicated with the telescopic pipes 1102 are slidably arranged in the cylindrical cavity 602, when the outer ends of the supporting rods 1103 extend out of the plugging member 6 and contact with the inner wall of the wellbore, the supporting rods 1103 finish straightening the supporting housing 1, and two plugging members 6 are in a horizontal state, so that the air bags 1204 are uniformly expanded, exhaust holes 1104 are arranged at one ends of the supporting rods 1103 far away from the telescopic pipes 1102, the exhaust holes 1104 of the adjacent supporting rods 1103 are distributed in opposite directions, and the exhausted steam enhances the fluidity of thick oil outside the plugging members 6, so that the subsequent air bags 1204 are in contact with the inner wall of the wellbore.
As shown in fig. 9, the partition assembly 12 includes an air pump 1201, the air pump 1201 is disposed in the blocking member 6, the air pump 1201 is communicated with the first annular cavity 603 through a through hole, a first electromagnetic valve 1202 is disposed in the first connection through hole 604, a second electromagnetic valve 1203 is disposed in the second connection through hole 605, an air bag 1204 communicated with the second connection through hole 605 is disposed outside the blocking member 6, since oil around the air bag 1204 is filled with steam, the fluidity of the oil is increased, the air bag 1204 is easier to push away surrounding oil in the process of contacting the air bag 1204 with the inner wall of the wellbore, a pressure sensor 1205 is disposed in the first annular cavity 603, and the first electromagnetic valve 1202, the second electromagnetic valve 1203 and the pressure sensor 1205 are electrically connected to the control terminal.
As shown in fig. 9 and 10, the detection assembly 13 includes three connection pipes 1301, three connection pipes 1301 are arranged in the circumferential direction, the three connection pipes 1301 are communicated with the first annular cavity 603, a piston disc 1302 is slidably arranged in the connection pipe 1301, an electrical connection switch 1303 is arranged in the connection pipe 1301, the electrical connection switch 1303 is located above the piston disc 1302, a guide rod 1304 fixedly connected with the piston disc 1302 is slidably arranged at the top of the connection pipe 1301, a spring 1305 is fixedly connected between the piston disc 1302 and the connection pipe 1301, the spring 1305 is sleeved on the guide rod 1304, a blocking disc 1306 for blocking the air vent 607 is fixedly connected to one end of the guide rod 1304, which is far away from the piston disc 1302, the piston disc 1302 drives the guide rod 1304 to move upwards, the guide rod 1304 drives the blocking disc 1306 to move upwards, the air vent 607 is gradually opened, the spring 1305 is compressed, when the piston disc 1302 contacts the switch 1303, the air vent 607 is opened, steam in the second annular cavity 606 enters the target layer section through the air vent 607, and steam is injected into the thick oil in the target layer, so that the flowability of the thick oil is increased, and the subsequent oil is convenient to extract.
When thick oil of a medium and small oil field needs to be steamed, an operator firstly determines the thickness of thick oil of the medium and small oil field, namely the thickness of a target interval, puts the device into a shaft through other hoisting equipment and places the device above the target interval, an initial position separation disc 5 is positioned above a steam transmission cavity 101, two plugging pieces 6 are adjacent, then the operator starts a driving component 2 through a control terminal, the driving component 2 drives a screw rod 3 to rotate, the separation disc 5 is limited by a semi-cylindrical rod and the separation disc 5 is fixedly connected with a sliding rod 4, so that the sliding rod 4 drives the separation disc 5 and the plugging piece 6 below to move downwards under the driving of the screw rod 3, when the plugging piece 6 below moves to the lower part of the target interval, the operator stops the driving component 2 through the control terminal, at the moment, target layer section is located between two shutoff pieces 6, operating personnel starts the piece of lighting a fire in the burning chamber 9011 through control terminal afterwards, gas pipe 903 injects the gas to burning chamber 9011, air pipe 904 injects the air to burning chamber 9011, inlet tube 905 injects water into steam chamber 902, the piece of lighting a fire the water of gas in to steam chamber 902 heats steam production, water through steam chamber 902 will react the casing 901 and surround, make full use of the heat that the gas produced, along with the production of steam, water level reduces gradually in the steam chamber 902, the water inlet setting of inlet tube 905 is in steam chamber 902 lower part, through constantly carrying out the water injection to steam chamber 902 below, avoided water and top high temperature water contact, the higher water density of temperature is less, the density is little is located the top, better water injection effect has been realized.
Steam generated by the steam cavity 902 enters the steam transfer cavity 101 through the through holes, a part of steam in the steam transfer cavity 101 enters the upper fixed pipe 1101 and the second annular cavity 606 through the three first air ducts 7, the other part of steam in the steam transfer cavity 101 enters the annular cylinder cavity 401 through the sealing assembly 10 and then enters the lower fixed pipe 1101 and the second annular cavity 606 through the three second air ducts 8, in the process of steam production, an operator starts the air pump 1201 through the control terminal, opens the first electromagnetic valve 1202 and closes the second electromagnetic valve 1203, the air pump 1201 injects air into the first annular cavity 603, the first annular cavity is communicated with the air pressure cavity 601 through the first connecting through hole 604, the atmospheric pressure in the three is the same, along with the increase of pressure in atmospheric pressure chamber 601, shutoff piece 6 is stretched out gradually to bracing piece 1103 outer end, flexible pipe 1102 is stretched, after bracing piece 1103 stretched out shutoff piece 6, the steam in the fixed pipe 1101 gets into bracing piece 1103 through flexible pipe 1102, the steam in the bracing piece 1103 is discharged through exhaust hole 1104, because adjacent exhaust hole 1104 is to distributing, the mobility of thick oil outside shutoff piece 6 has been strengthened to the steam of discharge, be convenient for follow-up gasbag 1204 and the contact of pit shaft inner wall, when bracing piece 1103 continued to stretch out from shutoff piece 6 and when contacting with the pit shaft inner wall, bracing piece 1103 accomplishes the correction to supporting shell 1, two shutoff pieces 6 are in the horizontality simultaneously, be convenient for the even expansion of gasbag 1204.
When the pressure sensor 1205 detects that the pressure in the first annular cavity 603 reaches a preset value, an operator closes the first electromagnetic valve 1202 through the control terminal, and opens the second electromagnetic valve 1203, at this time, the first annular cavity is communicated with the air bag 1204 through the second connecting through hole 605, the pressure in the air bag 1204 gradually increases, the air bag 1204 starts to expand and gradually contacts with the inner wall of the shaft and seals a target interval, because the petroleum around the air bag 1204 is filled with steam, the fluidity of the petroleum is increased, in the process that the air bag 1204 contacts with the inner wall of the shaft, the air bag 1204 can more easily push away the surrounding petroleum, meanwhile, the air bag 1204 gradually seals the exhaust hole 1104, the injection of steam around the two sealing pieces 6 is stopped, and after the air bag 1204 contacts with the inner wall of the shaft, the petroleum hardly remains between the air bag 1204 and the inner wall of the shaft, a better sealing effect on the target interval is achieved, heat overflow is avoided, and heat loss is reduced.
When the air bag 1204 contacts with the inner wall of the shaft, the pressure sensor 1205 detects that the pressure in the first annular cavity 603 reaches the preset value again, the operator closes the second electromagnetic valve 1203 through the control terminal, at this time, the first electromagnetic valve 1202 and the second electromagnetic valve 1203 are both closed, as the pressure in the first annular cavity 603 increases, the piston disc 1302 drives the guide rod 1304 to move upwards, the guide rod 1304 drives the blocking disc 1306 to move upwards, the air holes 607 are gradually opened, the spring 1305 is compressed, when the piston disc 1302 contacts with the switch 1303, the air holes 607 are opened, the steam in the second annular cavity 606 enters the target interval through the air holes 607, and because the steam in the two second annular cavities 606 is in a high-pressure state, after the bleeder vent 607 is opened, oil can not get into in the second annular cavity 606 through bleeder vent 607, operating personnel closes air pump 1201 through control terminal, thick oil to the target interval pours into steam into, the mobility of thick oil increases, make things convenient for the extraction of follow-up oil, replace original one-way gas injection through two-way gas injection, the use amount of steam has been reduced, the thermal loss has been reduced, the gas injection time has been shortened, better steam injection effect has been realized, support shutoff piece 6 through slide bar 4, it leads to shutoff piece 6 to take place the slope to have avoided the increase of target interval pressure, the condition such as break away from appears, better target interval shutoff effect has been realized.
In the process of steam injection, because the steam below the sealing plate 1002 is in a high-pressure state, the steam in the steam transfer cavity 101 enters the annular cylinder cavity 401 through the air guide hole 1003, the steam in the air guide hole 1003 can extrude the sealing ring 1001, because the sealing plate 1002 is in a frustum shape, the lower side surface of the sealing ring 1001 is arranged to be an arc-shaped surface matched with the sealing plate 1002, the sealing ring 1001 is made of an elastic material, the lower surface of the sealing ring 1001 can expand outwards when being pressurized, the pressure between the sealing ring 1001 and the supporting shell 1 is increased, the steam overflow is prevented, a better sealing effect is realized, meanwhile, the steam is prevented from entering the driving assembly 2 in the steam transfer cavity 101, the normal operation of the driving assembly 2 is ensured, meanwhile, because the sliding rod 4 is made of an aluminum alloy material, the aluminum alloy has good thermal conductivity and higher hardness than pure aluminum, when the steam enters the annular cylinder cavity 401, part of the heat of the steam is transferred to a target layer section through the sliding rod 4, the temperature increase of the thick oil mobility is assisted, and a better steam injection effect is realized.
After the steam injection of the target interval is completed, an operator starts the air pump 1201 through the control terminal to pump air, the plugging disc 1306 moves downwards to plug the air holes 607, the second electromagnetic valve 1203 is opened through the control terminal, the air bag 1204 is gradually reset, after the air bag 1204 is reset, the operator closes the second electromagnetic valve 1203 through the control terminal, the first electromagnetic valve 1202 is opened at the same time, the supporting rod 1103 is gradually reset, after the supporting rod 1103 is reset, the operator stops inputting gas into the combustion chamber 9011 through the control terminal, the steam injection of the target interval is stopped, the driver assembly 2 is started through the control terminal to reset the plugging piece 6, after the reset of the device is completed, the operator takes the device out of the shaft through a hoisting device, the device is used and used, and the operator performs subsequent soaking and oil extraction.
The above-described embodiments are provided to enable persons skilled in the art to make or use the invention, and that persons skilled in the art may make modifications or changes to the above-described embodiments without departing from the inventive concept thereof, and therefore the scope of protection of the invention is not limited by the above-described embodiments but should be accorded the widest scope consistent with the innovative features recited in the claims.
Claims (9)
1. A thickened oil heat adoption gas injection device for reducing heat loss comprises a support shell (1), and is characterized in that a steam transfer cavity (101) is arranged in the support shell (1), a driving assembly (2) is arranged in the steam transfer cavity (101), a screw (3) which is in transmission connection with the driving assembly (2) through a gear is rotatably arranged in the support shell (1), a sliding rod (4) is in threaded fit with the screw (3), an annular cylinder cavity (401) is arranged in the sliding rod (4), an isolation disc (5) fixedly connected with the sliding rod (4) is slidably arranged in the support shell (1), two plugging pieces (6) are symmetrically arranged, one plugging piece (6) is in sliding connection with the sliding rod (4), the other plugging piece (6) is fixedly connected with the sliding rod (4), the plugging piece (6) in sliding connection with the sliding rod (4) is fixedly connected with the support shell (1), a first gas guide pipe (7) communicated with the steam transfer cavity (101) is arranged on the support shell (1), a second gas guide pipe (8) is arranged in the plugging piece (6) fixedly connected with the sliding rod (4), a gas guide pipe (9) on the support shell (1), a sealing mechanism (10) for producing the isolation disc (5) is fixedly connected with a semi-circle sealing assembly (10) for sealing assembly and a sealing mechanism for sealing assembly for the isolation disc (5), a correcting component (11) for supporting the shell (1) to be straightened is arranged in the semi-cylindrical rod plugging piece (6), the first air duct (7) is communicated with the adjacent correcting component (11), and the second air duct (8) is communicated with the adjacent correcting component (11) and the annular cylinder cavity (401);
an air pressure cavity (601), a cylindrical cavity (602), a first annular cavity (603), a first connecting hole (604), a second connecting hole (605), a second annular cavity (606) and an air hole (607) are arranged in the plugging piece (6), the air pressure cavity (601) is communicated with the first annular cavity (603) through the first connecting hole (604), the second annular cavity (606) is communicated with the air hole (607), and the correcting component (11) is communicated with the second annular cavity (606); wherein, correct subassembly (11) including fixed pipe (1101), fixed pipe (1101) circumference sets up in atmospheric pressure chamber (601), fixed pipe (1101) one end and second annular cavity (606) intercommunication, fixed pipe (1101) other end and shutoff piece (6) form sealedly, intercommunication has symmetrical flexible pipe (1102) on fixed pipe (1101), the bracing piece (1103) that slide in cylindrical cavity (602) and be provided with flexible pipe (1102) intercommunication, the one end that flexible pipe (1102) were kept away from to bracing piece (1103) is provided with exhaust hole (1104).
2. The thickened oil heat adoption gas injection device for reducing heat loss according to claim 1, characterized in that the steam production mechanism (9) comprises a reaction shell (901), the reaction shell (901) is arranged in the support shell (1), the first gas guide pipe (7) is embedded in the reaction shell (901), a combustion chamber (9011) is arranged in the reaction shell (901), an ignition piece is arranged in the combustion chamber (9011), the ignition piece is electrically connected with the control terminal, a steam chamber (902) is formed between the reaction shell (901) and the support shell (1), the steam chamber (902) is communicated with the steam transfer cavity (101) through a through hole, the combustion chamber (9011) is communicated with a gas pipe (903) and an air pipe (905), and the steam chamber (902) is communicated with a water inlet pipe (905).
3. The gas injection apparatus for viscous oil heating with reduced heat loss according to claim 2, wherein the inlet of the water inlet pipe (905) is located at the lower part of the steam chamber (902).
4. The thickened oil thermal adoption gas injection device for reducing heat loss as claimed in claim 1, wherein the sealing assembly (10) comprises a sealing ring (1001), the sliding rod (4) is sleeved with the sealing ring (1001) matched with the isolation disc (5), the sliding rod (4) is fixedly connected with a sealing plate (1002), the sealing plate (1002) is provided with a gas guide hole (1003) for communicating the steam transfer cavity (101) with the annular cylinder cavity (401), and the sealing ring (1001) and the sealing plate (1002) are slidably connected with the semi-cylindrical rod.
5. The gas injection device for thick oil heating for reducing heat loss according to claim 4, wherein the sealing plate (1002) is formed in a frustum shape, and the lower side surface of the sealing ring (1001) is formed in an arc-shaped surface which is engaged with the sealing plate (1002).
6. A device for injecting heavy oil with reduced heat loss as claimed in claim 5, wherein the material of the seal ring (1001) is an elastic material.
7. The thickened oil thermal adoption gas injection device for reducing heat loss according to claim 1, characterized in that the blocking piece (6) is further provided with a partition assembly (12) for partitioning a target interval, the partition assembly (12) and the correction assembly (11) are matched for supporting the blocking piece (6), a control terminal is arranged on the supporting shell (1), the partition assembly (12) comprises an air pump (1201), the air pump (1201) is arranged in the blocking piece (6), the air pump (1201) is communicated with the first annular cavity (603) through a through hole, a first electromagnetic valve (1202) is arranged in the first connecting through hole (604), a second electromagnetic valve (1203) is arranged in the second connecting through hole (605), an air bag (1204) communicated with the second connecting through hole (605) is arranged on the outer side of the blocking piece (6), a pressure sensor (1205) is arranged in the first annular cavity (603), and the first electromagnetic valve (1202), the second electromagnetic valve (1203) and the pressure sensor (1205) are electrically connected with the control terminal.
8. The heavy oil thermal use gas injection device for reducing heat loss according to claim 7, wherein a detection assembly (13) is arranged in the plugging member (6), and the detection assembly (13) and the partition assembly (12) are matched to communicate steam with a target fault; detection element (13) is including connecting pipe (1301), connecting pipe (1301) circumference sets up in shutoff piece (6) and communicates with first annular cavity (603), it is provided with piston dish (1302) to slide in connecting pipe (1301), be provided with switch (1303) of being connected with control terminal electricity in connecting pipe (1301), it is provided with guide arm (1304) with piston dish (1302) rigid coupling to slide on connecting pipe (1301), the rigid coupling has spring (1305) between piston dish (1302) and connecting pipe (1301), and spring (1305) cover is established on guide arm (1304), the one end rigid coupling that piston dish (1302) was kept away from in guide arm (1304) has shutoff dish (1306) with bleeder vent (607) shutoff.
9. The gas injection device for thick oil heating for reducing heat loss according to claim 8, wherein the driving assembly (2), the partition assembly (12) and the detection assembly (13) are electrically connected with the control terminal.
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| CN202211133776.1A CN115263258B (en) | 2022-09-19 | 2022-09-19 | Reduce calorific loss's viscous crude heat and adopt gas injection device |
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| CN202211133776.1A CN115263258B (en) | 2022-09-19 | 2022-09-19 | Reduce calorific loss's viscous crude heat and adopt gas injection device |
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| CN102121367A (en) * | 2011-01-30 | 2011-07-13 | 蒯泽明 | Underground steam injection sealing, heat insulation and compensation integrated device |
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| CN102913175A (en) * | 2012-10-29 | 2013-02-06 | 陕西联盟物流有限公司 | Oil well plugging device |
| CN104453757A (en) * | 2014-11-17 | 2015-03-25 | 中国石油天然气股份有限公司 | Thick oil steam flooding releasing two-way anchoring tubing anchor |
| RU2558031C1 (en) * | 2014-08-22 | 2015-07-27 | Александр Сергеевич Артамонов | Steam-gas generator for production of oil and gas condensate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121367A (en) * | 2011-01-30 | 2011-07-13 | 蒯泽明 | Underground steam injection sealing, heat insulation and compensation integrated device |
| CN102359355A (en) * | 2011-09-23 | 2012-02-22 | 中国石油天然气股份有限公司 | Concentric-tube double-tube steam injection wellhead device |
| CN102562004A (en) * | 2012-01-19 | 2012-07-11 | 中国石油天然气股份有限公司 | One-trip tubing string separate-injection coproduction method for thick oil thermal recovery well |
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Inventor after: Liu Zhibo Inventor after: Jiang Dongdong Inventor after: Sun Jianfei Inventor after: Pang Yuanlei Inventor after: Liu Zhigang Inventor after: Sun Xiangkuan Inventor after: Li Yi Inventor after: Liu Yang Inventor after: Xi Wenlei Inventor before: Liu Zhibo Inventor before: Lv Xue Inventor before: Xi Wenlei Inventor before: Han Gaowen Inventor before: Jiang Dongdong Inventor before: Sun Jianfei Inventor before: Pang Yuanlei Inventor before: Liu Zhigang Inventor before: Sun Xiangkuan Inventor before: Li Yi Inventor before: Liu Yang |