CN110374561B - Presetting tool for measuring water absorption profile of double-tube separate injection upper layer and using method thereof - Google Patents
Presetting tool for measuring water absorption profile of double-tube separate injection upper layer and using method thereof Download PDFInfo
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- CN110374561B CN110374561B CN201910648437.9A CN201910648437A CN110374561B CN 110374561 B CN110374561 B CN 110374561B CN 201910648437 A CN201910648437 A CN 201910648437A CN 110374561 B CN110374561 B CN 110374561B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 34
- 238000002347 injection Methods 0.000 title claims abstract description 34
- 239000007924 injection Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000013461 design Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/063—Valve or closure with destructible element, e.g. frangible disc
-
- 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
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- 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
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a preset tool for measuring water absorption profile of a double-pipe separate injection upper layer and a use method thereof, wherein the preset tool consists of a preset cylinder body and a plugging device inserted into the preset cylinder body, the preset cylinder body comprises an upper joint, an overflow sleeve, a spring, a closing piston, a piston seat assembly, an outer cylinder, a positioning cylinder and a lower joint, the upper joint, the overflow sleeve, the outer cylinder and the lower joint are sequentially connected from top to bottom, the spring and the closing piston are arranged in the overflow sleeve, one end of the spring props against the upper joint, the other end of the spring props against the upper end of the closing piston, and the lower end of the closing piston is contacted with the outer cylinder; the piston seat component penetrates into the outer cylinder and is connected with the upper joint, and the positioning cylinder penetrates into the lower joint and is connected with the lower joint; the outer surface of the upper part of the plugging device is sequentially attached to the upper joint and the piston seat assembly, and the outer surface of the lower part of the plugging device is attached to the positioning cylinder in a sealing way. The invention solves the bottleneck problem that the double-tube separate injection process can not measure the upper water absorption profile through the isotope logging process.
Description
Technical Field
The invention belongs to the technical field of oil extraction in an oil field, and particularly relates to a preset tool for measuring water absorption profile of a double-pipe separate injection upper layer.
Background
With the deep development of oilfield water injection, in order to master the production condition of each water injection interval in real time, the basic conditions such as the temperature, the pressure and the like of an oil reservoir are known, and the research of a double-pipe separate injection technology is developed. However, the annular space of the inner tube and the outer tube is small and the space shape is irregular, and the existing logging process cannot enter, so that the double-tube separate injection upper water absorption profile test cannot be carried out. At present, a preset tool suitable for double-pipe separate injection upper layer water absorption profile measurement is not available in the market, so that the product is urgently needed to fill the market blank so as to meet the requirement of fine water injection in an oil field.
Disclosure of Invention
The invention aims to provide a preset tool for measuring the water absorption profile of a double-tube separate injection upper layer, which solves the problem that the upper layer cannot measure the water absorption profile in the double-tube separate injection process.
The technical scheme of the invention is as follows:
the preset tool for measuring the water absorption profile of the upper layer of the double-tube separate injection consists of a preset cylinder body and a plugging device, wherein the plugging device is inserted into the preset cylinder body;
the preset cylinder body comprises an upper joint, an overcurrent sleeve, a spring, a closing piston, a piston seat assembly, an outer cylinder, a positioning cylinder and a lower joint, wherein the inner side of the upper part of the overcurrent sleeve is connected with the outer side of the lower part of the upper joint, the inner side of the lower part of the overcurrent sleeve is connected with the outer side of the upper part of the outer cylinder, and the inner side of the lower part of the outer cylinder is connected with the lower joint; the spring and the closing piston are arranged in the overcurrent sleeve, one end of the spring props against the lower end face of the upper joint, the other end of the spring props against the upper end of the closing piston, and the lower end of the closing piston is connected with the outer cylinder; the piston seat component penetrates into the outer cylinder and is connected with the inner side of the lower part of the upper joint, a semicircular hole is formed in the top of the positioning cylinder, and the positioning cylinder penetrates into the lower joint and is connected with the lower joint;
the upper outer surface of the plugging device is sequentially attached to the upper joint and the piston seat assembly, and the lower outer surface of the plugging device is attached to the positioning cylinder in a sealing manner.
The piston seat assembly consists of a piston seat, a starting pin and a starting piston, wherein the starting piston is arranged in the piston seat and is positioned at the lower part of the piston seat, and the starting piston is fixed through the starting pin; the upper outer side of the piston seat is in threaded connection with the lower inner side of the upper joint; and a flow passage is reserved between the piston seat and the outer cylinder.
The piston seat is of an annular cylinder structure with the outer diameter gradually increasing from top to bottom, and comprises an upper piston seat and a lower piston seat which are integrally connected, a pin hole is formed in the upper part of the lower piston seat, and the starting pin penetrates through the pin hole to install the piston seat in the lower piston seat; the lower part of the lower piston seat is provided with an overflow hole which is communicated with the overflow channel.
The outer diameter of the piston seat is three sections of steps gradually increasing.
The upper end of the positioning cylinder is in contact with the inner upper end of the lower piston seat, and the lower end of the positioning cylinder is in threaded connection with the lower joint.
The lower end of the closing piston adopts an inclined plane design, and the lower end of the closing piston is connected with the outer cylinder and is sealed by a first sealing ring.
The lower joint is connected with the outer cylinder through threads.
The upper part of the flow passage sleeve is provided with a pressure balance hole, and the pressure balance hole is arranged on the flow passage sleeve between the lower end surface of the upper joint and the closing piston.
The flow passage sleeve is also provided with a plurality of water outlets which are uniformly distributed along the outer circumference of the flow passage sleeve and are positioned below the pressure balance holes.
The plugging device consists of a plugging rod and a second sealing ring, wherein a sealing ring groove is formed in the outer circumference of the plugging rod, the second sealing ring is arranged in the sealing ring groove, and the outer side of the second sealing ring is higher than the outer circumferential surface of the plugging rod.
The application method of the preset tool for measuring the water absorption profile of the double-tube separate injection upper layer comprises the following steps: firstly, connecting the plugging device at the lowest part of a logging instrument and descending the plugging device into a preset cylinder body, and sealing the plugging device with the inner wall of a positioning cylinder through a second sealing ring of the plugging device to isolate upper pressure from lower pressure; then the ground pump truck presses from the intraductal pressure, the pressure gets into and pushes the start piston from the semicircle orifice of locating cylinder, cut when the pressure reaches the design value of start pin, start piston receives the decline and give way the overflow orifice, rivers continue to go upward along the clearance between piston seat and the urceolus, then push open and close the piston, the spring is pressed and is retracted this moment, rivers get into double-barrelled annular space from the apopore, reentrant oil jacket annular space, finally get into the stratum, then shut down the pump, close the piston and receive spring force and gravity effect down to close the apopore, finally, the logging instrument cluster of lifting to work well section position, develop the section test work of absorbing water.
The invention has the beneficial effects that:
the preset tool is suitable for measuring the water absorption profile of the upper layer of the double-pipe separate injection process, and the aim of measuring the water absorption profile of the upper layer of the double-pipe separate injection process is fulfilled by matching with an upper water distributor (one-way overflow) and a large-channel (inner diameter is larger than the diameter of an inner pipe) packer for double-pipe separate injection operation, so that the bottleneck problem that the upper water absorption profile of the double-pipe separate injection process cannot be measured by an isotope logging process is solved, and the application range of the process is enlarged by further perfecting the process matching technology; and has the advantages of simple structure, simple and convenient construction, reliable operation, low construction risk and the like.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a preset tool according to the present invention;
FIG. 2 is a schematic structural view of the occluder of the present invention;
FIG. 3 is a schematic view of the structure of the preset cylinder body according to the present invention;
fig. 4 is a schematic structural view of the piston seat.
Description of the reference numerals
1. An upper joint; 2. an overcurrent sleeve; 3. a spring; 4. closing the piston; 5. a piston seat; 6. an outer cylinder; 7. starting a pin; 8. starting a piston; 9. an overflow hole; 10. a positioning cylinder; 11. a lower joint; 12. a pressure balance hole; 13. a water outlet hole; 14. a first sealing ring; 15. presetting a cylinder body; 16. a stopper; 17. a plugging rod; 18. a second sealing ring; 19. semicircle holes, 20 and pin holes.
Detailed Description
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "circumferential", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or pieces referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the definitions "a" and "an" are for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Embodiments of the present invention will be further described with reference to the accompanying drawings:
as shown in fig. 1, a preset tool for measuring the water absorption profile of the upper layer of double-tube separate injection is composed of a preset cylinder body 15 and a plugging device 16, wherein the plugging device 16 is inserted into the preset cylinder body 15;
as shown in fig. 2, the preset cylinder body 15 includes an upper joint 1, an overcurrent sleeve 2, a spring 3, a closing piston 4, a piston seat assembly, an outer cylinder 6, a positioning cylinder 10, and a lower joint 11, wherein the upper inner side of the overcurrent sleeve 2 is connected with the lower outer side of the upper joint 1, the lower inner side of the overcurrent sleeve 2 is connected with the upper outer side of the outer cylinder 6, and the lower inner side of the outer cylinder 6 is connected with the lower joint 11; the spring 3 and the closing piston 4 are arranged in the overcurrent sleeve 2, one end of the spring 3 props against the lower end face of the upper joint 1, the other end of the spring 3 props against the upper end of the closing piston 4, and the lower end of the closing piston 4 is connected with the outer cylinder 6; the piston seat component penetrates into the outer cylinder 6 and is connected with the inner side of the lower part of the upper joint 1, a semicircular hole 19 is formed in the top of the positioning cylinder 10, and the positioning cylinder 10 penetrates into the lower joint 11 and is connected with the lower joint 11;
the upper outer surface of the plugging device 16 is sequentially attached to the upper joint 1 and the piston seat assembly, and the lower outer surface of the plugging device 16 is in sealing attachment with the positioning cylinder 10.
The preset cylinder body is arranged on the upper part of the insertion pipe of the inner-layer pipe column in advance and is put into a preset position along with the pipe column. When the upper water absorption section is needed to be measured, firstly, the plugging device is connected to the lowest part of the logging instrument and is arranged in the preset cylinder body, and the sealing ring of the plugging device is used for isolating the upper pressure and the lower pressure; then the ground pump truck presses from the inside of the pipe, and the preset cylinder body is opened through the flow passage; then the logging instrument releases isotopes, and the isotopes firstly enter the double-pipe annulus, then enter the sleeve annulus and finally enter the stratum along with water flow; and after stopping the pump, lifting the logging instrument string to the position of the working well section to perform the water absorption profile test.
The preset tool is suitable for measuring the water absorption profile of the upper layer of the double-pipe separate injection process, and the aim of measuring the water absorption profile of the upper layer of the double-pipe separate injection process is fulfilled by being matched with an upper water distributor (one-way overflow) and a large-channel (the inner diameter of an outer pipe is larger than that of the outer pipe) packer for double-pipe separate injection operation, so that the bottleneck problem that the upper water absorption profile of the double-pipe separate injection process cannot be measured through an isotope logging process is solved.
Example 2
On the basis of the embodiment 1, further, the piston seat assembly is composed of a piston seat 5, an actuating pin 7 and an actuating piston 8, wherein the actuating piston 8 is installed in the piston seat 5 and is positioned at the lower part of the piston seat 5, and the actuating piston 8 is fixed by the actuating pin 7; the upper outer side of the piston seat 5 is in threaded connection with the lower inner side of the upper joint 1; an overflow channel is reserved between the piston seat 5 and the outer cylinder 6.
As shown in fig. 4, the piston seat 5 is an annular cylinder structure with an outer diameter gradually increasing from top to bottom, and comprises an upper piston seat and a lower piston seat which are integrally connected, a pin hole 20 is formed in the upper part of the lower piston seat, and the starting pin 7 passes through the pin hole 20 to mount the piston seat 5 in the lower piston seat; the lower part of the lower piston seat is provided with an overflow hole 9, and the overflow hole 9 is communicated with the overflow channel.
Further, the outer diameter of the piston seat 5 is three-stage stepwise gradually increased.
The upper end of the positioning cylinder 10 is in contact with the inner upper end of the lower piston seat, and the lower end of the positioning cylinder 10 is in threaded connection with the lower joint 11.
The preset tool liquid flow channel adopts a bottom-up design, and in normal test, the liquid flow channel is opened by overcoming the gravity of a closing piston and the force of a spring by utilizing the upward thrust of liquid flow; after the test is finished, the closing piston is closed downwards by gravity and the action of spring force.
Example 3
On the basis of the above embodiment, further, a pressure balance hole 12 is provided at the upper part of the flow sleeve 2, and the pressure balance hole 12 is provided on the flow sleeve 2 between the lower end surface of the upper joint 1 and the closing piston 4.
Further, the flow sleeve 2 is further provided with a plurality of water outlet holes 13, and the water outlet holes 13 are uniformly distributed along the outer circumference of the flow sleeve 2 and are positioned below the pressure balance holes 12.
When the closing piston 4 is pushed upwards by liquid flow, the upper part of the overflow sleeve 2 is provided with a pressure balance hole 12, so that the phenomenon that a dead cavity is formed on the upper part of the closing piston, and a water outlet hole cannot be opened normally is avoided.
The lower end of the closing piston 4 is of an inclined surface structure, the lower end of the closing piston 4 is connected with the outer cylinder 6 and is sealed through a first sealing ring 14, and the first sealing ring 14 is a special-shaped sealing ring matched with the inclined surface of the lower end of the closing piston 4. The lower end of the closing piston 4 adopts an inclined plane and special-shaped sealing ring design, and the pressure acting area of the upper part (outside) is 2-4 times that of the lower part (inside) during normal water injection, so that the closing piston can normally work when the internal pressure and the external pressure are the same.
Further, as shown in fig. 2, the plugging device 16 is composed of a plugging rod 17 and a second sealing ring 18, a sealing ring groove is arranged on the outer circumference of the plugging rod 17, the second sealing ring 18 is arranged in the sealing ring groove, and the outer side of the second sealing ring 18 is higher than the outer circumferential surface of the plugging rod 17. The function is to seal the lower part of the preset cylinder body 15 to realize the separation of logging channels.
Example 4
As shown in fig. 3, the installation process of the preset cylinder body is as follows:
firstly, connecting the overcurrent sleeve 2 with the upper joint 1 through threads;
secondly, the spring 3 and the closing piston 4 provided with the sealing ring I14 are arranged in the overflow sleeve;
thirdly, connecting the outer cylinder 6 with the closing piston 4;
fourthly, the starting piston 8 is arranged in the piston seat 5 and fixed by the starting pin 7, and the assembled piston seat assembly (comprising the starting piston 8 and the starting pin 7) is placed for standby;
and fifthly, penetrating the piston seat assembly into the outer cylinder 6 and connecting the piston seat assembly with the upper joint through threads.
Sixthly, connecting the lower joint 11 with the outer cylinder 6 through threads;
and seventh, penetrating the positioning cylinder 10 into the lower joint, and connecting the positioning cylinder with the lower joint 11 through threads, so that the whole assembly of the preset cylinder body is completed.
The working principle of the preset tool for measuring the water absorption profile of the double-tube separate injection upper layer is as follows: the preset cylinder body 15 is arranged at a design position in the water injection well along with the lower layer oil pipe; when the upper water absorption section is required to be measured, firstly, the plugging device 16 is connected to the lowest part of the logging instrument and to the preset cylinder body 15, and sealing is formed between the second sealing ring 18 of the plugging device 16 and the inner wall of the positioning cylinder 10, so that the isolation of upper pressure and lower pressure is realized; then the ground pump truck is pressed from the inside of the pipe, the pressure enters from a semicircular hole of the positioning cylinder 10 and pushes the starting piston 8, the starting piston 8 is sheared when the pressure reaches the design value of the starting pin 7, the starting piston 8 is pressed down to leave the flow-through hole 9, water flow continues to go upwards along the gap between the piston seat 5 and the outer cylinder 6, then the closing piston 4 is pushed open (the spring 3 is pressed and retracted), and the water flow enters into the double-pipe annular space from the water outlet hole 13 and then enters into the oil sleeve annular space, and finally enters into the stratum; then the pump is stopped, the closing piston 4 is closed downwards under the action of spring force and gravity to close the water outlet 13, and the internal and external communication is prevented from influencing the normal water injection production. And finally, lifting the logging instrument string to the position of the working well section, and carrying out water absorption profile test work.
Claims (10)
1. A double-barrelled divides annotates upper strata survey water absorption section's preset instrument, its characterized in that: the device consists of a preset cylinder body (15) and a plugging device (16), wherein the plugging device (16) is inserted into the preset cylinder body (15);
the preset cylinder body (15) comprises an upper joint (1), an overcurrent sleeve (2), a spring (3), a closing piston (4), a piston seat assembly, an outer cylinder (6), a positioning cylinder (10) and a lower joint (11), wherein the inner side of the upper part of the overcurrent sleeve (2) is connected with the outer side of the lower part of the upper joint (1), the inner side of the lower part of the overcurrent sleeve (2) is connected with the outer side of the upper part of the outer cylinder (6), and the inner side of the lower part of the outer cylinder (6) is connected with the lower joint (11); the spring (3) and the closing piston (4) are arranged in the overcurrent sleeve (2), one end of the spring (3) props against the lower end face of the upper joint (1), the other end of the spring (3) props against the upper end of the closing piston (4), and the lower end of the closing piston (4) is connected with the outer cylinder (6); the piston seat component penetrates into the outer cylinder (6) and is connected with the inner side of the lower part of the upper joint (1), a semicircular hole (19) is formed in the top of the positioning cylinder (10), and the positioning cylinder (10) penetrates into the lower joint (11) and is connected with the lower joint (11);
the upper outer surface of the plugging device (16) is sequentially attached to the upper joint (1) and the piston seat assembly, and the lower outer surface of the plugging device (16) is in sealing attachment with the positioning cylinder (10).
2. The presetting tool for measuring the water absorption profile of the double-tube separate injection upper layer according to claim 1, wherein the presetting tool is characterized in that: the piston seat assembly consists of a piston seat (5), a starting pin (7) and a starting piston (8), wherein the starting piston (8) is arranged in the piston seat (5) and is positioned at the lower part of the piston seat (5), and the starting piston (8) is fixed through the starting pin (7); the outer side of the upper part of the piston seat (5) is in threaded connection with the inner side of the lower part of the upper joint (1); a flow passage is reserved between the piston seat (5) and the outer cylinder (6).
3. The presetting tool for measuring the water absorption profile of the double-tube separate injection upper layer according to claim 2, wherein the presetting tool is characterized in that: the piston seat (5) is of an annular cylinder structure with the outer diameter gradually increasing from top to bottom, and comprises an upper piston seat and a lower piston seat which are integrally connected, a pin hole (20) is formed in the upper part of the lower piston seat, and the starting pin (7) penetrates through the pin hole (20) to install the piston seat (5) in the lower piston seat; the lower part of the lower piston seat is provided with an overflow hole (9), and the overflow hole (9) is communicated with the overflow channel.
4. A preset tool for measuring water absorption profile of a double-tube dispensing upper layer according to claim 3, wherein: the outer diameter of the piston seat (5) is three-section stepwise gradually increased.
5. A preset tool for measuring water absorption profile of a double-tube dispensing upper layer according to claim 3, wherein: the upper end of the positioning cylinder (10) is in contact with the inner upper end of the lower piston seat, and the lower end of the positioning cylinder (10) is connected with the lower joint (11) through threads.
6. The presetting tool for measuring the water absorption profile of the double-tube separate injection upper layer according to claim 1, wherein the presetting tool is characterized in that: the lower end of the closing piston (4) adopts an inclined plane design, and the lower end of the closing piston (4) is connected with the outer cylinder (6) and is sealed by a first sealing ring (14).
7. The presetting tool for measuring the water absorption profile of the double-tube separate injection upper layer according to claim 1, wherein the presetting tool is characterized in that: the upper part of the overflow sleeve (2) is provided with a pressure balance hole (12), and the pressure balance hole (12) is arranged on the overflow sleeve (2) between the lower end surface of the upper joint (1) and the closing piston (4).
8. The presetting tool for measuring the water absorption profile of the double-tube separate injection upper layer according to claim 7, wherein the presetting tool is characterized in that: the overflow sleeve (2) is also provided with a plurality of water outlets (13), and the water outlets (13) are uniformly distributed along the outer circumference of the overflow sleeve (2) and are positioned below the pressure balance holes (12).
9. The presetting tool for measuring the water absorption profile of the double-tube separate injection upper layer according to claim 1, wherein the presetting tool is characterized in that: the plugging device (16) consists of a plugging rod (17) and a second sealing ring (18), wherein a sealing ring groove is formed in the outer circumference of the plugging rod (17), the second sealing ring (18) is arranged in the sealing ring groove, and the outer side of the second sealing ring (18) is higher than the outer circumferential surface of the plugging rod (17).
10. The method of using a preset tool for measuring water absorption profile of double-tube dispensing upper layer according to any one of claims 1-9, comprising the steps of: firstly, a plugging device (16) is connected to the lowest part of a logging instrument and is arranged in a preset cylinder body (15), and a second sealing ring (18) of the plugging device (16) forms a seal with the inner wall of a positioning cylinder (10) to isolate upper pressure from lower pressure; then the ground pump truck is pressed from the inside of the pipe, the pressure enters from the semicircular hole of the positioning cylinder (10) and pushes the starting piston (8), the pressure is sheared when reaching the design value of the starting pin (7), the starting piston (8) is pressed down to leave the flow through hole (9), the water flow continues to go upward along the gap between the piston seat (5) and the outer cylinder (6), then the closing piston (4) is pushed open, at the moment, the spring (3) is pressed and retracted, the water flow enters into the double-pipe annular space from the water outlet hole (13) and then enters into the oil sleeve annular space, finally enters into the stratum, then the pump is stopped, the closing piston (4) is pressed by the spring force and the gravity to close the water outlet hole (13), and finally, the logging instrument string is lifted to the position of the working well section, and the water absorption profile test work is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648437.9A CN110374561B (en) | 2019-07-18 | 2019-07-18 | Presetting tool for measuring water absorption profile of double-tube separate injection upper layer and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648437.9A CN110374561B (en) | 2019-07-18 | 2019-07-18 | Presetting tool for measuring water absorption profile of double-tube separate injection upper layer and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110374561A CN110374561A (en) | 2019-10-25 |
| CN110374561B true CN110374561B (en) | 2023-06-30 |
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