CN116104450A - Liquid production device, acidizing sand prevention oil production string, water injection oil production string and method thereof - Google Patents
Liquid production device, acidizing sand prevention oil production string, water injection oil production string and method thereof Download PDFInfo
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- CN116104450A CN116104450A CN202111328374.2A CN202111328374A CN116104450A CN 116104450 A CN116104450 A CN 116104450A CN 202111328374 A CN202111328374 A CN 202111328374A CN 116104450 A CN116104450 A CN 116104450A
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- 239000007788 liquid Substances 0.000 title claims abstract description 131
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 88
- 239000004576 sand Substances 0.000 title claims abstract description 76
- 238000002347 injection Methods 0.000 title claims abstract description 60
- 239000007924 injection Substances 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 230000002265 prevention Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 16
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 230000020477 pH reduction Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 122
- 238000001914 filtration Methods 0.000 claims description 21
- 230000009471 action Effects 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 14
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 9
- 230000000638 stimulation Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 238000005065 mining Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000003129 oil well Substances 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 28
- 230000000903 blocking effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000004936 stimulating effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000020681 well water Nutrition 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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- 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
- E21B43/14—Obtaining from a multiple-zone well
-
- 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
- E21B43/20—Displacing by water
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/27—Methods for stimulating production by forming crevices or fractures by use of eroding chemicals, e.g. acids
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a liquid production device, an acidification sand prevention oil production string, a water injection oil production string and a method thereof, and relates to the field of efficient oil well exploitation. The liquid collecting device comprises an upper component and a lower component. The acidizing sand prevention oil extraction pipe column comprises a first plug, a first oil pipe, a first sleeve, a plurality of first layered packers, a hanging releasing packer and a plurality of liquid extraction devices. The water injection oil production string comprises a second plug, a second oil pipe, a second sleeve, a plurality of second layered packers, a suspension packer and a plurality of liquid production devices. During construction, acid liquid or water is injected into each stratum from bottom to top, and then oil extraction operation is carried out. The invention can realize layered oil extraction and water injection in the same well, realize multiple purposes of one well, meet different horizon injection and production in different time periods of the same well, and reduce the independent drilling cost.
Description
Technical Field
The patent relates to the field of efficient exploitation of oil wells, in particular to a liquid exploitation device, an acidification sand prevention oil exploitation pipe column, a water injection oil exploitation pipe column and a method thereof.
Background
The offshore oil field enters a high water content period, and is exploited by long-term water injection, so that interlayer interference is further aggravated, and exploitation difficulty is also increased. And the oil well layering development can effectively improve the oil reservoir utilization degree, and finally the purpose of improving the recovery ratio is realized. At present, a plurality of problems are mainly faced: 1. the pressure coefficient of a part of the high-permeability reservoir is low, the invasion radius of the reservoir injury is large, meanwhile, the near-wellbore zone and the blasthole can be blocked by the particle migration, the permeability is reduced, and the productivity is reduced; 2. the interlayer difference is large due to long-term production, the permeation rate level difference is large due to the fact that a plurality of small layers are adopted in a laminated mode, interlayer interference is further increased through long-term water injection exploitation, and the total liquid extraction amount is 33.5% of the layered liquid amount according to statistics; 3. at present, 7-in first casing well completion is commonly adopted at sea, and the difficulty of separate production is higher after a layered sand control well is arranged in a 7-in first casing well barrel. Under the large background of the great production and liquid extraction of the operation well, how to improve the blocking removal effect of the low liquid well and the recovery ratio is particularly important.
The patent with the publication number of CN204299556U discloses a layered acidification and underground split injection integrated pipe column, which consists of a first oil pipe column and a layered water distribution pipe column, wherein the layered water distribution pipe column is formed by sequentially connecting a water distributor, a packer, a water distributor, a ball seat, a screen pipe and a first plug up and down, and a reciprocating switch is arranged between the first oil pipe column and the water distributor of the layered water distribution pipe column. The invention realizes the completion of one-pass tubular column of layered acidification and underground layered water injection in principle, but the invention needs to put in a fisheable blanking plug when the invention acidizes, and needs to put out the blanking plug when the invention is used for later water injection, and the steel balls are put in the blanking plug again, so that the layered water injection can be implemented, the construction steps are complicated, and the invention does not conflict with the invention.
The patent with the publication number of CN106703763A discloses an intelligent layered mining system suitable for sand prevention completion of offshore oil fields, which comprises a wellhead christmas tree, an underground safety valve, a cable passing packer, a Y joint, a perforated pipe, a cable passing positioning seal, a first intelligent production allocation device, a first cable passing insertion seal, a second intelligent production allocation device, a second cable passing insertion seal, a third intelligent production allocation device and a round plug which are connected through a first oil pipe, wherein the cable passing packer is provided with a deflation valve and a cable crossing device, the Y joint is connected with an electric submersible pump unit, the electric submersible pump unit is connected with an electric submersible pump control system, and the first intelligent production allocation device, the second intelligent production allocation device and the third intelligent production allocation device are all connected with a ground controller. The invention can realize the purposes of oil well water finding, layered testing, water shutoff, layered exploitation and the like by one-time operation, can monitor and control underground parameters such as single-layer flow, water content, pressure, temperature and the like in real time, realizes low-cost and high-efficiency development of oil fields, and is suitable for sand prevention completion of offshore oil fields. Because the mode that the Y joint is connected with the electric submersible pump unit is adopted, the inner diameter of a shaft is required to be large, and for a well with a small diameter of 7in an offshore oil field of a victory oil field, the construction in layered sand prevention is difficult to realize. Meanwhile, the acidification blocking removal operation is frequently adopted, and an additional operation procedure is additionally added, so that the construction efficiency is reduced.
Disclosure of Invention
Aiming at the defects existing in the prior art, one of the purposes of the invention is to provide a liquid extraction device which is provided with liquid inlet and liquid outlet channels and can realize multiple functions of oil field liquid extraction and liquid injection.
Another object of the present invention is to provide an acidizing sand prevention oil production string using the liquid production device and a construction method thereof, which realize layered acidizing and simultaneously rapidly perform layered sand prevention and layered oil production operations, improve the operation efficiency and reduce the high operation cost at sea.
Another object of the present invention is to provide a water injection oil production string using the liquid production device and a construction method thereof, which can realize separate water injection and simultaneously rapidly perform separate oil production operation, improve operation efficiency and reduce high operation cost at sea.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The liquid collecting device comprises an upper component and a lower component.
The upper component comprises an upper joint, an anti-rotation sleeve, an adjusting sleeve, a central tube, a valve, an upper ball seat, a sealing tube and a connector, wherein the central axes of the inner holes are on the same vertical straight line; the inner wall of the upper joint is in threaded connection with the outer wall of the upper end of the central tube, the adjusting sleeve is in threaded connection with the outer wall of the upper joint, and the outer wall of the lower end of the central tube is in threaded connection with the inner wall of the upper end of the connecting head; the outer wall of the central tube is sleeved with a valve, the outer wall of the upper end of the connector is sleeved with a corrosion-resistant sealing sleeve, and the top end of the corrosion-resistant sealing sleeve is in contact with the valve; the central tube is sleeved with a spring ring and a gasket ring, the lower end of the spring ring is in contact with the valve, the upper end of the spring ring is in contact with the gasket ring, and the top end of the gasket ring is in contact with the adjusting sleeve; the lower part of the valve of the central tube is provided with a liquid injection through hole, the shear pin on the inner wall of the central tube is fixedly provided with an upper ball seat, and the upper ball seat seals the liquid injection through hole, so that a wall-clamping cavity is formed among the corrosion-resistant sealing sleeve, the valve, the central tube and the connector.
The lower assembly comprises an upper outer sleeve, a sealing tube and a lower outer sleeve, wherein the inner hole of the upper outer sleeve is in the same straight line with the central axis of the upper joint, the outer diameter of the lower end of the upper outer sleeve is larger than the outer diameter of the rest part of the upper outer sleeve, and the inner diameter of the lower end of the upper outer sleeve is larger than the inner diameter of the rest part of the upper outer sleeve; the inner wall of the upper end of the upper outer sleeve is in threaded connection with the outer wall of the lower end of the connector; the outer diameter of the upper end of the lower outer sleeve is larger than the outer diameter of the rest part of the lower outer sleeve, and the inner diameter of the upper end of the lower outer sleeve is larger than the outer diameter of the rest part of the lower outer sleeve; the radial inner peripheral surface of the lower end of the upper outer sleeve and the radial inner peripheral surface of the lower end of the lower outer sleeve are in threaded connection with the outer wall of the sealing tube; the lower end of the upper outer sleeve is in threaded connection with the upper end of the lower outer sleeve, so that a wall-clamping cavity is formed among the upper outer sleeve, the lower outer sleeve and the sealing tube; one or more groups of flowback components are vertically arranged in the wall-clamping cavity; each flowback assembly sequentially comprises a battery, a circuit, a motor, a sealing sleeve and a lower ball seat from top to bottom; the bottom end of the lower ball seat is contacted with the top surface of the position where the inner diameter of the inner hole of the lower outer sleeve is enlarged, the lower end of the motor is provided with a sealing rod which can be lifted, and the lower end of the sealing rod is inserted into the inner hole of the sealing sleeve; a sealing ball is arranged on the inner hole of each lower ball seat; a plurality of third acquisition through holes are arranged below the lower ball seat of the lower outer sleeve; and a first collecting through hole is arranged right below the motor above each lower ball seat of the sealing pipe, and a second collecting through hole communicated with the first collecting through hole nearest to the sealing pipe is arranged on each sealing sleeve.
As the preferable technical scheme, the adjusting sleeve is provided with an anti-rotation nail which can be embedded into the upper joint.
As the preferable technical proposal, the outer wall of the lower outer sleeve is provided with a shape memory screen pipe.
As the preferable technical scheme, the valve is sealed with the outside of the central tube, the upper ball seat is sealed with the inside of the central tube, the upper outer sleeve is sealed with the sealing tube, the upper outer sleeve is sealed with the lower outer sleeve, and the sealing sleeve is sealed with the inner wall of the lower outer sleeve and the outer wall of the sealing tube through rubber rings.
As the preferable technical proposal, the corrosion-resistant sealing sleeve and the valve, the sealing rod and the sealing sleeve, and the sealing ball and the sealing sleeve are all mechanically sealed.
As a preferred embodiment, the diameter of the first sleeve is 7 inches.
The acidizing sand control oil production pipe column, its characterized in that: the device comprises a first plug, a first oil pipe, a first sleeve, a plurality of first layered packers, a hanging releasing packer and a plurality of liquid production devices;
the first plug is positioned at the bottommost end, the first layered packer is arranged between an upper oil layer and a lower oil layer, the suspension releasing packer is arranged at the upper end of the uppermost oil layer, each liquid collecting device is positioned at an oil layer part, and the first plug, the first layered packer, the suspension releasing packer and the liquid collecting device are all connected through a first oil pipe and are commonly arranged in the first casing; the diameter of the inner hole of the upper ball seat below the liquid sampling devices is gradually reduced.
As a preferable technical scheme, the number of the liquid collecting devices is 2-6.
As the preferable technical scheme, the hanging releasing packer is preferably a Y445 packer and the like.
As a preferable technical scheme, the first layered packer is preferably a Y341 packer.
The construction method of the acidified sand control oil production string is characterized by comprising the following steps of:
an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat of the liquid production device corresponding to the lowest stratum to be produced is put in, acid liquid is injected into a first oil pipe through a ground pump, after the liquid production device reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin, the upper ball seat falls off, and the opening of a liquid injection through hole is realized; injecting acid liquor into the stratum from the liquid injection through hole, jacking the valve, and enabling the acid liquor to enter the stratum to be acidified; after stopping the pump, the valve is automatically closed under the action of the spring to prevent the stratum from spitting back.
The self expansion of the shape memory sand filtering pipe is excited to fill the space between the first oil pipe and the first sleeve, so that the layered sand prevention effect is realized.
When liquid is required to be produced, the upper computer is started in advance by a preset program or a code is printed by a pressure pulse device on the ground, under the control of a circuit, the motor drives the sealing rod to move upwards, the produced liquid enters the first flowback through hole of the lower outer sleeve through the shape memory sand filtering pipe and then enters the wall clamping cavity to separate the sealing ball from the lower ball seat, and the produced liquid enters the liquid production device through the inner hole of the lower ball seat of each flowback assembly, the inner hole of the sealing sleeve, the first collection through hole and the second collection through hole, is collected to the ground under the action of the oil pumping pump, so that the exploitation of the stratum to be exploited is completed.
And then the mining of other layers to be mined is gradually completed from bottom to top according to the method.
As a preferred technical scheme, the shape memory sand filtering tube is excited by pumping special stimulating liquid or by a temperature sensing mode. The sand prevention principle of the shape memory sand filtering pipe is as follows: and in a compression state, such as a well, after the screen pipe is excited to expand by using the downhole temperature or the subsequent excitation, filling the annulus and blocking sand from flowing.
As a preferable technical scheme, the special stimulation liquid is KCl water solution.
The water injection oil extraction pipe column comprises a second plug, a second oil pipe, a second sleeve, a plurality of second layered packers, a suspension packer and a plurality of liquid extraction devices;
the second plug, the second layered packer, the suspension packer and the liquid production device are all connected through a first oil pipe and are commonly arranged in the second casing; the second plug is positioned at the bottommost end, and the suspension packer is arranged at the upper end of the uppermost oil layer; the second layered packer is respectively arranged between the upper oil layer and the lower oil layer, and each oil layer corresponds to a liquid collecting device; the diameter of the inner hole of the upper ball seat below the liquid sampling devices is gradually reduced.
As a preferable technical scheme, the number of the liquid collecting devices is 2-6.
The construction method of the water injection oil production pipe column comprises the following steps:
an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat of the liquid production device corresponding to the lowest stratum to be produced is put in, water is injected into a second oil pipe through a ground pump, after the liquid production device reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin, the upper ball seat falls off, and the opening of a liquid injection through hole is realized; the injected water enters from the liquid injection through hole, jacks up the valve and enters the stratum; after stopping the pump, automatically closing the valve under the action of a spring;
when oil extraction is needed, the upper computer is started in advance by a preset program or codes are printed by a pressure pulse device on the ground, under the control of a circuit, a motor drives a sealing rod to move upwards, so that a third collecting through hole is communicated with an inner hole of a lower ball seat, oil enters a first flowback through hole of a lower outer sleeve through a shape memory sand filtering pipe, then enters a wall clamping cavity to separate the sealing ball from the lower ball seat, and produced liquid enters the inside of the liquid collecting device through the inner hole of the lower ball seat of each flowback assembly, the inner hole of a sealing sleeve, the first collecting through hole and the second collecting through hole, is collected to the ground under the action of a pumping pump, so that the exploitation of the stratum to be exploited is completed;
and then the mining of other layers to be mined is gradually completed from bottom to top according to the method.
As the preferable technical scheme, after water injection is finished, when sand prevention is needed, the shape memory sand filtering pipe is excited to expand to fill the space between the first oil pipe and the first sleeve, so that the layered sand prevention effect is realized.
As a preferred technical scheme, the shape memory sand filtering tube is excited by pumping special stimulating liquid or by a temperature sensing mode.
As a preferable technical scheme, the special stimulation liquid is KCl water solution.
Compared with the prior art, the invention has the following advantages:
1. the liquid sampling device has a unique structure, and when in use, the liquid injection channel can be opened by only inputting an upper ball seat sealing ball capable of sealing an inner hole of the upper ball seat and pressurizing; the upper computer is started in advance by a preset program or is coded by a pressure pulse device on the ground, so that the opening of the mining-related channel can be controlled. When sand prevention is needed, the shape memory sand filtering pipe is excited to expand to fill the space between the first oil pipe and the first sleeve, so that the layered sand prevention effect is realized.
2. The pipe column is designed integrally, so that the purposes of layered acidification, layered sand prevention and layered oil extraction under the pipe column for one time are realized, and the operation efficiency is improved;
3. the mode of electric control separate production and shape memory sand filtering in the wall-sandwiched cavity is not limited by the current sand prevention drift diameter, so that separate prevention separate production in a 7-in first cased well is realized;
4. the layering level of the tubular column structure can reach six levels, and the intelligent sub-prevention sub-production requirement of the offshore oil field oil reservoir is met;
5. the acid injection channel is provided with an anti-reverse-spitting structure, so that stratum sand and other foreign matters are ensured to enter the interior of the pipe column during flowback construction;
6. the pipe column structure realizes layered oil extraction and layered water injection in the same well through another development mode, realizes multiple purposes of one well, satisfies different horizon injection and production in different time periods of the same well, and reduces independent drilling cost.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an acidizing sand control string of the present invention.
Fig. 2 is a schematic structural view of the liquid collecting device.
Fig. 3 is a partial enlarged view of a portion a of fig. 2.
Fig. 4 is a partial enlarged view of a portion C of fig. 3.
Fig. 5 is a partial enlarged view of the D portion of fig. 3.
Fig. 6 is a partial enlarged view of a portion B of fig. 2.
Fig. 7 is a partial enlarged view of a portion E of fig. 6.
Fig. 8 is a partial enlarged view of a portion G of fig. 7.
Fig. 9 is a partial enlarged view of a portion F of fig. 6.
FIG. 10 is a schematic diagram of a preferred embodiment of a water injection string.
FIG. 11 is a schematic diagram of an embodiment of an acidizing sand control string of the present invention.
FIG. 12 is a schematic diagram of a preferred embodiment of a water injection string.
Wherein: 1-first plugs, second plugs-10, 2-first oil pipes, second oil pipes-20, 3-first sleeves, 30-second sleeves, 4-liquid production devices, 5-first layered packers, 50-second layered packers, 6-hanging releasing packers and 7-hanging packers;
400-filling through holes, 401-upper connectors, 402-rotation preventing nails, 403-adjusting sleeves, 404-gasket rings, 405-spring rings, 406-central pipes, 407-first rubber rings, 408-valves, 409-shear nails, 410-upper ball seats, 411-corrosion resistant sealing sleeves, 412-connectors, 413-upper outer sleeves, 414-sealing pipes, 415-batteries, 416-circuits, 417-motors, 418-sealing rods, 419-sealing sleeves, 420-sealing balls, 421-lower ball seats, 422-lower outer sleeves, 423-shape memory sieve tubes, third collecting through holes-424, first collecting through holes-425, second collecting through holes-426, second rubber rings-427, third rubber rings-428, fourth rubber rings-429, fifth rubber rings-430 and sixth rubber rings-431.
Detailed Description
The invention will now be further described with reference to the drawings and examples.
Example 1. As shown in fig. 2-9, the liquid production device 4 comprises an upper assembly and a lower assembly.
The upper component comprises an upper joint 401, an anti-rotation sleeve 402, an adjusting sleeve 403, a central tube 406, a valve 408, an upper ball seat 410, a sealing tube 414 and a connector 412, wherein the central axes of the inner holes are on the same vertical line; the inner wall of the upper joint 401 is in threaded connection with the outer wall of the upper end of the central tube 406, the adjusting sleeve 403 is in threaded connection with the outer wall of the upper joint 401, and the outer wall of the lower end of the central tube 406 is in threaded connection with the inner wall of the upper end of the connector 412; the valve 408 is sleeved on the outer wall of the central tube 406, the corrosion-resistant sealing sleeve 411 is sleeved on the outer wall of the upper end of the connector 412, and the top end of the corrosion-resistant sealing sleeve 411 is in contact with the valve 408; the central tube 406 is sleeved with a spring ring 405 and a gasket ring 404, the lower end of the spring ring 405 is contacted with a valve 408, the upper end of the spring ring 405 is contacted with the gasket ring 404, and the top end of the gasket ring 404 is contacted with the adjusting sleeve 403; a liquid injection through hole 400 is arranged below the valve 408 of the central tube 406, an upper ball seat 410 is fixed on the inner wall of the central tube 406 through shear pins, and the upper ball seat 410 seals the liquid injection through hole 400, so that a double-wall cavity is formed among the corrosion-resistant sealing sleeve 411, the valve 408, the central tube 406 and the connector 412.
The lower assembly comprises an upper outer sleeve 413, a sealing tube 414 and a lower outer sleeve 422, wherein the inner holes of the upper outer sleeve 413 and the central axis of the upper joint 401 are on the same straight line, the outer diameter of the lower end of the upper outer sleeve 413 is larger than the outer diameter of the rest part of the upper outer sleeve, and the inner diameter of the lower end of the upper outer sleeve 413 is larger than the inner diameter of the rest part of the upper outer sleeve; the upper inner wall of the upper outer sleeve 413 is in threaded connection with the lower outer wall of the connector 412; the outer diameter of the upper end of the lower outer jacket 422 is greater than the outer diameter of the rest thereof, and the inner diameter of the upper end of the lower outer jacket 422 is greater than the outer diameter of the rest thereof; the radial inner circumferential surface of the lower end of the upper outer sleeve 413 and the radial inner circumferential surface of the lower end of the lower outer sleeve 422 are in threaded connection with the outer wall of the sealing tube 414; the lower end of the upper outer sleeve 413 is in threaded connection with the upper end of the lower outer sleeve 422, so that a wall-clamping cavity is formed among the upper outer sleeve 413, the lower outer sleeve 422 and the sealing tube 414; one or more groups of flowback components are vertically arranged in the wall-clamping cavity; each flowback assembly comprises a battery 415, a circuit 416, a motor 417, a sealing sleeve 419 and a lower ball seat 421 from top to bottom in sequence; the bottom end of the lower ball seat 421 is contacted with the top surface of the position where the inner diameter of the inner hole of the lower outer sleeve 422 is enlarged, the lower end of the motor 417 is provided with a sealing rod 418 which can be lifted, and the lower end of the sealing rod 418 is inserted into the inner hole of the sealing sleeve 419; a sealing ball 420 is arranged on the inner hole of each lower ball seat 421; a plurality of third collecting through holes 424 are arranged below the lower ball seat 421 of the lower outer sleeve 422; a first collecting through hole 425 is arranged right below the motor 417 above each lower ball seat 421 of the sealing tube 414, and a second collecting through hole 426 communicated with the first collecting through hole nearest to the sealing sleeve 419 is arranged on each sealing sleeve 419.
The adjusting sleeve 403 is provided with an anti-rotation nail 402 which can be embedded into the upper joint 401.
The outer wall of the lower outer sleeve 422 is provided with a shape memory screen 423.
The valve 408 and the outside of the central tube 406, the upper ball seat 410 and the inside of the central tube 406, the upper outer sleeve 413 and the sealing tube 414, the upper outer sleeve 413 and the lower outer sleeve 422, the sealing sleeve 419 and the inner wall of the lower outer sleeve 422 and the outer wall of the sealing tube 414 are all sealed by rubber rings.
The valve 408 and the outside of the central tube 406 are sealed by a plurality of first rubber rings 407; the upper ball seat 410 is sealed with the inside of the central tube 406 by a plurality of second rubber rings 427; the upper outer sleeve 413 and the sealing tube 414 are sealed by a plurality of third rubber rings 428; the upper outer sleeve 413 and the lower outer sleeve 422 are sealed by a plurality of fourth rubber rings 429; a plurality of fifth rubber rings 430 are arranged on the seal sleeve 419, and the fifth rubber rings 430 are contacted with the inner wall of the lower outer sleeve 422 and the outer wall of the seal tube 414; the connection head between the corrosion-resistant sealing sleeve 411 and the connection head 412 is sealed by a sixth rubber ring 431.
The corrosion resistant seal cartridge 411 and the valve 408, the seal rod 418 and the seal cartridge 419, and the seal ball 420 and the seal cartridge 419 are all mechanically sealed.
The diameter of the first sleeve 3 is 7 inches.
Example 2. As shown in fig. 1-9, the acidizing sand prevention oil production string comprises a first plug 1, a first oil pipe 2, a first sleeve 3, a first layered packer 5, a suspension release packer 6 and a plurality of liquid production devices 4 of the embodiment 1;
the first plug 1 is positioned at the bottommost end, the first layered packer 5 is arranged between an upper oil layer and a lower oil layer, the suspension releasing packer 6 is arranged at the upper end of the uppermost oil layer, each liquid production device 4 is positioned at an oil layer part, and the first plug 1, the first layered packer 5, the suspension releasing packer 6 and the liquid production devices 4 are connected through the first oil pipe 2 and are jointly arranged in the first casing 3; each of the liquid production devices 4 has an inner hole diameter gradually smaller from the upper ball seat 410 below.
The hanging releasing packer is preferably a Y445 packer and the like.
The first layered packer is preferably a Y341 packer.
The construction method of the acidizing sand prevention oil production string comprises the following steps: an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat 410 of the layered acidification sand prevention oil extraction water injection integrated device 4 corresponding to a stratum to be mined below is put in, acid liquid is injected into an oil pipe 2 through a ground pump, after the layered acidification sand prevention oil extraction water injection integrated device 4 reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin 409, the upper ball seat 410 falls off, and the opening of an acid injection through hole 400 is realized; the injected acid liquor enters from the acid injection through hole 400, the valve 408 is jacked up, and the acid liquor enters the stratum to start acidification; after stopping the pump, the valve 408 is automatically closed under the action of the spring 406 to prevent the stratum from spitting back and the acidification is finished; pumping special stimulating liquid to realize layered sand prevention; the sand prevention principle of the shape memory sand filtering pipe is as follows: in a compressed state, such as a well, after the screen pipe is excited to expand by using the downhole temperature or the subsequent excitation, a gap between the first oil pipe 2 and the first casing pipe is filled, and sand is blocked from flowing.
When separate production is needed, the upper computer is started in advance by a preset program or codes are printed through a pressure pulse device on the ground, under the control of the circuit 416, the motor 417 drives the sealing rod 418 to move upwards, so that the third collecting through hole 424 is communicated with the inner hole of the lower ball seat 409, produced liquid enters the first flowback through hole 424 of the lower outer sleeve 422 through the shape memory sand filtering pipe, then enters the wall-clamping cavity to separate the sealing ball 420 from the lower ball seat 421, and the produced liquid enters the layered acidification sand prevention oil extraction and water injection integrated device 4 through the inner hole of the lower ball seat 421 of each flowback assembly, the inner hole of the sealing sleeve 419, the first collecting through hole 425 and the second collecting through hole 426, is extracted to the ground under the action of the oil extraction pump, and the exploitation of the stratum to be exploited is completed.
And (3) putting an upper ball seat sealing ball capable of sealing an inner hole of the upper ball seat 410 of the layered acidification sand prevention oil extraction water injection integrated device 4 corresponding to the stratum to be mined above, and repeating the steps.
The special stimulation liquid is KCl water solution.
Example 3. The present embodiment differs from embodiment 2 in that: and the self-expansion filling annular well completion is stimulated in a temperature sensing mode, so that layered sand prevention is realized.
Example 4. As shown in fig. 2-10, the water injection oil production string comprises a second plug 10, a second oil pipe 20, a second sleeve 30, a suspension packer 7, a second layered packer 50, and the liquid production device 4 of two embodiments 1; respectively in two layers.
The second plug 10, the hanging packer 7 and the liquid production device 4 are connected through the first oil pipe 2 and are arranged in the second sleeve 30 together; the second plug 10 is positioned at the bottommost end, the hanging packer 7 is arranged above the uppermost oil layer, the second layered packer 50 is positioned between the upper and lower oil layers, and each oil layer corresponds to a liquid collecting device 4 respectively; each of the liquid production devices 4 has an inner hole diameter gradually smaller from the upper ball seat 410 below.
The construction method of the water injection oil production pipe column comprises the following steps:
putting an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat 410 of the liquid production device 4 corresponding to the lowest stratum to be produced, injecting water into a second oil pipe 20 through a ground pump, and cutting off shear pins 409 by the upper ball seat sealing ball after the liquid production device 4 reaches a certain pressure, wherein the upper ball seat 410 falls off to realize opening of a liquid injection through hole 400; injected water enters from the liquid injection through hole 400, jacks the valve 408 and enters the stratum; after stopping the pump, the valve 408 is automatically closed under the action of the spring 406;
when oil extraction is needed, the upper computer is started in advance by a preset program or codes are printed by a pressure pulse device on the ground, under the control of a circuit 416, a motor 417 drives a sealing rod 418 to move upwards, so that a third collecting through hole 424 is communicated with an inner hole of a lower ball seat 409, oil enters a first flowback through hole 424 of a lower outer sleeve 422 through a shape memory sand filtering 423 pipe, then enters a wall-clamping cavity to separate a sealing ball 420 from the lower ball seat 421, and produced liquid enters the inside of the liquid production device 4 through the inner hole of the lower ball seat 421 of each flowback assembly, the inner hole of a sealing sleeve 419, the first collecting through hole 425 and the second collecting through hole 426, is collected to the ground under the action of an oil pumping pump, and the exploitation of a stratum to be exploited is completed;
production from the formation above is then completed as described above.
After water injection is finished, when sand prevention is needed, the shape memory sand filtering pipe 424 is excited to expand to fill the space between the first oil pipe 2 and the first sleeve 3, so that the layered sand prevention effect is realized. The sand prevention principle of the shape memory sand filtering pipe is as follows: and in a compression state, such as a well, after the screen pipe is excited to expand by using the downhole temperature or the subsequent excitation, filling a gap between the second oil pipe and the second casing pipe, and blocking sand from flowing.
The shape memory sand screen 424 is activated by pumping in a special stimulation fluid.
The special stimulation liquid is KCl water solution.
Example 5. As shown in fig. 11, the present embodiment 2 is different in that: the acidizing sand control oil production pipe column, its characterized in that: the device comprises a first plug 1, a first oil pipe 2, a first sleeve 3, two first layered packers 5, a hanging releasing packer 6 and a liquid production device 4 described in the three embodiments 1;
the first plug 1 is positioned at the bottommost end, each first layered packer 5 is respectively arranged between an upper oil layer and a lower oil layer, each suspension releasing packer 6 is arranged at the upper end of the uppermost oil layer, each liquid production device 4 is positioned at an oil layer part, and the first plug 1, the first layered packer 5, the suspension releasing packer 6 and the liquid production devices 4 are connected through the first oil pipe 2 and are jointly arranged in the first casing 3; each of the liquid production devices 4 has an inner hole diameter gradually smaller from the upper ball seat 410 below.
The construction method comprises the following steps: an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat 410 of the liquid production device 4 corresponding to the lowest stratum to be produced is put in, acid liquid is injected into the first oil pipe 2 through a ground pump, after the liquid production device 4 reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin 409, the upper ball seat 410 falls off, and the opening of the liquid injection through hole 400 is realized; the injected acid liquor enters from the liquid injection through hole 400, the valve 408 is jacked up, and the acid liquor enters the stratum to start acidification; after stopping the pump, the valve 408 is automatically closed under the action of the spring 406 to prevent the stratum from spitting back;
the shape memory sand filtering pipe 424 is excited to expand and fill the space between the first oil pipe 2 and the first sleeve 3, so that the layered sand prevention effect is realized;
when liquid is required to be produced, the upper computer is started in advance by a preset program or a code is printed by a pressure pulse device on the ground, under the control of a circuit 416, a motor 417 drives a sealing rod 418 to move upwards, the produced liquid enters a first flowback through hole 424 of a lower outer sleeve 422 through a shape memory sand filtering pipe 424 and then enters a wall-clamping cavity to separate a sealing ball 420 from a lower ball seat 421, and the produced liquid enters the liquid production device 4 through an inner hole of the lower ball seat 421 of each flowback assembly, an inner hole of a sealing sleeve 419, a first collecting through hole 425 and a second collecting through hole 426, is produced to the ground under the action of a pumping pump, and the exploitation of the stratum to be exploited is completed;
and then the mining of other layers to be mined is gradually completed from bottom to top according to the method.
Example 6. As shown in fig. 12, this embodiment 4 is different in that: the water injection oil production string comprises a second plug 10, a second oil pipe 20, a second sleeve 30, two second layered packers 50, a suspension packer 7 and the liquid production device 4 in the three embodiment 1;
the second plug 10, the hanging packer 7 and the liquid production device 4 are connected through the first oil pipe 2 and are arranged in the second sleeve 30 together; the second plug 10 is positioned at the bottommost end, and the hanging packer 7 is arranged at the upper end of the uppermost oil layer; the second layered packer 50 is respectively arranged between the upper and lower oil layers, and each oil layer corresponds to one liquid collecting device 4; each of the liquid production devices 4 has an inner hole diameter gradually smaller from the upper ball seat 410 below.
When in construction, an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat 410 of the liquid production device 4 corresponding to the lowest stratum to be produced is put in, water is injected into the second oil pipe 20 through a ground pump, after the liquid production device 4 reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin 409, the upper ball seat 410 falls off, and the opening of a liquid injection through hole 400 is realized; injected water enters from the liquid injection through hole 400, jacks the valve 408 and enters the stratum; after stopping the pump, the valve 408 is automatically closed under the action of the spring 406;
when oil extraction is needed, the upper computer is started in advance by a preset program or codes are printed by a pressure pulse device on the ground, under the control of a circuit 416, a motor 417 drives a sealing rod 418 to move upwards, so that a third collecting through hole 424 is communicated with an inner hole of a lower ball seat 409, oil enters a first flowback through hole 424 of a lower outer sleeve 422 through a shape memory sand filtering 423 pipe, then enters a wall-clamping cavity to separate a sealing ball 420 from the lower ball seat 421, and produced liquid enters the inside of the liquid production device 4 through the inner hole of the lower ball seat 421 of each flowback assembly, the inner hole of a sealing sleeve 419, the first collecting through hole 425 and the second collecting through hole 426, is collected to the ground under the action of an oil pumping pump, and the exploitation of a stratum to be exploited is completed;
and then the mining of other layers to be mined is gradually completed from bottom to top according to the method.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (19)
1. The acidizing sand control oil production pipe column, its characterized in that: the device comprises a first plug (1), a first oil pipe (2), a first sleeve (3), a plurality of first layered packers (5), a hanging releasing packer (6) and a liquid production device (4);
the first plug (1) is positioned at the bottommost end, the first layered packer (5) is arranged between an upper oil layer and a lower oil layer, the suspension releasing packer (6) is arranged at the upper end of the uppermost oil layer, each liquid collecting device (4) is positioned at an oil layer part, the first plug (1), the first layered packer (5), the suspension releasing packer (6) and the liquid collecting devices (4) are connected through the first oil pipe (2) and are jointly arranged in the first sleeve (3); the diameter of the inner hole of each liquid collecting device (4) is gradually reduced from the upper ball seat (410) below.
2. The acidizing sand control string as recited in claim 1 wherein: the number of the liquid collecting devices (4) is 2-6.
3. The acidizing sand control string according to claim 1, wherein: the hanging releasing packer is preferably a Y445 packer and the like.
4. The acidizing sand control string as recited in claim 1 wherein: the first layered packer is preferably a Y341 packer.
5. The method of constructing an acidizing sand control string according to any one of claims 1 to 4, comprising the steps of:
an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat (410) of the liquid production device (4) corresponding to the lowest stratum to be produced is put in, acid liquid is injected into the first oil pipe (2) through a ground pump, after the liquid production device (4) reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin (409), the upper ball seat (410) falls off, and the opening of the liquid injection through hole (400) is realized; the injected acid liquor enters from the liquid injection through hole (400), the valve (408) is jacked, and the acid liquor enters the stratum to start acidification; after stopping the pump, the valve (408) is automatically closed under the action of a spring (406) to prevent the stratum from spitting back;
the self-expansion of the shape memory sand filtering pipe (424) is excited to fill the space between the first oil pipe (2) and the first sleeve (3), so that the layered sand prevention effect is realized;
when liquid is required to be extracted, the upper computer is started in advance by a preset program or a code is printed by a pressure pulse device on the ground, under the control of a circuit (416), a motor (417) drives a sealing rod (418) to move upwards, the extracted liquid enters a first flowback through hole (424) of a lower outer sleeve (422) through a shape memory sand filtering pipe (424), then enters a wall-clamping cavity to separate a sealing ball (420) from a lower ball seat (421), and the extracted liquid enters the inside of a liquid extraction device (4) through an inner hole of the lower ball seat (421) of each flowback assembly, an inner hole of a sealing sleeve (419), a first acquisition through hole (425) and a second acquisition through hole (426), is extracted to the ground under the action of a pumping pump, and the extraction of the stratum to be extracted is completed;
and then the mining of other layers to be mined is gradually completed from bottom to top according to the method.
6. The method of constructing an acidizing sand control string according to claim 5, wherein: the shape memory sand screen (424) is activated by pumping in a special stimulation fluid or by temperature sensing.
7. The method of constructing an acidizing sand control string according to claim 6, wherein: the special stimulation liquid is KCl water solution.
8. Water injection oil production tubular column, its characterized in that: the device comprises a second plug (10), a second oil pipe (20), a second sleeve (30), a plurality of second layered packers (50), a hanging packer (7) and a liquid production device (4);
the second plug (10), the second layered packer (50), the suspension packer (7) and the liquid production device (4) are connected through the first oil pipe (2) and are arranged in the second sleeve (30) together; the second plug (10) is positioned at the bottommost end, and the hanging packer (7) is arranged at the upper end of the uppermost oil layer; the second layered packer (50) is respectively arranged between the upper oil layer and the lower oil layer, and each oil layer corresponds to one liquid collecting device (4); the diameter of the inner hole of each liquid collecting device (4) is gradually reduced from the upper ball seat (410) below.
9. The water injection string of claim 8, wherein: the number of the liquid collecting devices (4) is 2-6.
10. The construction method of the water injection production string according to any one of claims 8 to 9, comprising the steps of:
an upper ball seat sealing ball capable of sealing an inner hole of an upper ball seat (410) of the liquid production device (4) corresponding to the lowest stratum to be produced is put in, water is injected into a second oil pipe (20) through a ground pump, after the liquid production device (4) reaches a certain pressure, the upper ball seat sealing ball cuts off a shear pin (409), the upper ball seat (410) falls off, and the opening of a liquid injection through hole (400) is realized; the injected water enters from the liquid injection through hole (400), and jacks the valve (408) to enter the stratum; after stopping the pump, the valve (408) is automatically closed under the action of a spring (406);
when oil extraction is needed, the upper computer is started in advance by a preset program or codes are printed through a pressure pulse device on the ground, under the control of a circuit (416), a motor (417) drives a sealing rod (418) to move upwards, so that a third collecting through hole (424) is communicated with an inner hole of a lower ball seat (409), oil enters a first flowback through hole (424) of a lower outer sleeve (422) through a shape memory sand filtering (423) pipe, then enters a wall clamping cavity to separate a sealing ball (420) from the lower ball seat (421), and produced liquid enters the inside of a liquid collecting device (4) through an inner hole of the lower ball seat (421) of each flowback assembly, an inner hole of a sealing sleeve (419), the first collecting through hole (425) and the second collecting through hole (426), and is collected to the ground under the action of a pumping pump, so that the exploitation of a stratum to be exploited is completed;
and then the mining of other layers to be mined is gradually completed from bottom to top according to the method.
11. The method of construction of a water-injected oil production string of claim 10, wherein: after water injection is finished, when sand prevention is needed, the shape memory sand filtering pipe (424) is excited to expand to fill the space between the first oil pipe (2) and the first sleeve (3) so as to realize the layered sand prevention effect.
12. The method of construction of a water-injected oil production string of claim 11, wherein: the shape memory sand screen (424) is activated by pumping in a special stimulation fluid or by temperature sensing.
13. The method of construction of a water-injected oil production string of claim 12, wherein: the special stimulation liquid is KCl water solution.
14. A fluid production device for use in an acidizing sand control string according to any one of claims 1 to 4 or in a water injection string according to any one of claims 8 to 9, characterized in that: the liquid collecting device (4) comprises an upper component and a lower component;
the upper assembly comprises an upper joint (401), an anti-rotation sleeve (402), an adjusting sleeve (403), a central tube (406), a valve (408), an upper ball seat (410), a sealing tube (414) and a connector (412), wherein the central axes of the inner holes are on the same vertical straight line; the inner wall of the upper joint (401) is in threaded connection with the outer wall of the upper end of the central tube (406), the adjusting sleeve (403) is in threaded connection with the outer wall of the upper joint (401), and the outer wall of the lower end of the central tube (406) is in threaded connection with the inner wall of the upper end of the connector (412); the valve (408) is sleeved on the outer wall of the central tube (406), the corrosion-resistant sealing sleeve (411) is sleeved on the outer wall of the upper end of the connector (412), and the top end of the corrosion-resistant sealing sleeve (411) is contacted with the valve (408); a spring ring (405) and a gasket ring (404) are sleeved on the central tube (406), the lower end of the spring ring (405) is contacted with a valve (408), the upper end of the spring ring (405) is contacted with the gasket ring (404), and the top end of the gasket ring (404) is contacted with the adjusting sleeve (403); a liquid injection through hole (400) is arranged below the valve (408) of the central tube (406), an upper ball seat (410) is fixed on the inner wall of the central tube (406) through shear pins, and the upper ball seat (410) seals the liquid injection through hole (400), so that a cavity is formed among the corrosion-resistant sealing sleeve (411), the valve (408), the central tube (406) and the connector (412);
the lower assembly comprises an upper outer sleeve (413), a sealing tube (414) and a lower outer sleeve (422), wherein the inner hole of the upper outer sleeve is in the same straight line with the central axis of the upper joint (401), the outer diameter of the lower end of the upper outer sleeve (413) is larger than the outer diameter of the rest part of the upper outer sleeve, and the inner diameter of the lower end of the upper outer sleeve (413) is larger than the inner diameter of the rest part of the upper outer sleeve; the inner wall of the upper end of the upper outer sleeve (413) is in threaded connection with the outer wall of the lower end of the connector (412); the outer diameter of the upper end of the lower outer sleeve (422) is larger than the outer diameter of the rest part of the lower outer sleeve, and the inner diameter of the upper end of the lower outer sleeve (422) is larger than the outer diameter of the rest part of the lower outer sleeve; the radial inner peripheral surface of the lower end of the upper outer sleeve (413) and the radial inner peripheral surface of the lower end of the lower outer sleeve (422) are in threaded connection with the outer wall of the sealing tube (414); the lower end of the upper outer sleeve (413) is in threaded connection with the upper end of the lower outer sleeve (422), so that a double-wall cavity is formed among the upper outer sleeve (413), the lower outer sleeve (422) and the sealing tube (414); one or more groups of flowback components are vertically arranged in the wall-clamping cavity; each flowback assembly sequentially comprises a battery (415), a circuit (416), a motor (417), a sealing sleeve (419) and a lower ball seat (421) from top to bottom; the bottom end of the lower ball seat (421) is contacted with the top surface of the position where the inner diameter of the inner hole of the lower outer sleeve (422) is enlarged, the lower end of the motor (417) is provided with a sealing rod (418) which can be lifted, and the lower end of the sealing rod (418) is inserted into the inner hole of the sealing sleeve (419); a sealing ball (420) is arranged on the inner hole of each lower ball seat (421); a plurality of third collecting through holes (424) are arranged below the lower ball seat (421) of the lower outer sleeve (422); a first collecting through hole (425) is arranged right below a motor (417) above each lower ball seat (421) of the sealing tube (414), and each sealing sleeve (419) is provided with a second collecting through hole (426) communicated with the nearest first collecting through hole.
15. The fluid collection apparatus of claim 14, wherein: the adjusting sleeve (403) is provided with an anti-rotation nail (402) which can be embedded into the upper joint (401).
16. The fluid collection apparatus of claim 14, wherein: the outer wall of the lower outer sleeve (422) is provided with a shape memory sieve tube (423).
17. The fluid collection apparatus of claim 14, wherein: the valve (408) is sealed with the outside of the central tube (406), the upper ball seat (410) is sealed with the inside of the central tube (406), the upper outer sleeve (413) is sealed with the sealing tube (414), the upper outer sleeve (413) is sealed with the lower outer sleeve (422), and the sealing sleeve (419) is sealed with the inner wall of the lower outer sleeve (422) and the outer wall of the sealing tube (414) through rubber rings.
18. The fluid collection apparatus of claim 14, wherein: the corrosion-resistant sealing sleeve (411) and the valve (408), the sealing rod (418) and the sealing sleeve (419) and the sealing ball (420) and the sealing sleeve (419) are all mechanically sealed.
19. The fluid collection apparatus of claim 14, wherein: the diameter of the first sleeve (3) is 7 inches.
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| CN202111328374.2A CN116104450A (en) | 2021-11-10 | 2021-11-10 | Liquid production device, acidizing sand prevention oil production string, water injection oil production string and method thereof |
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| CN202111328374.2A CN116104450A (en) | 2021-11-10 | 2021-11-10 | Liquid production device, acidizing sand prevention oil production string, water injection oil production string and method thereof |
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