CN108194050B - Underground sliding sleeve opening method and device - Google Patents
Underground sliding sleeve opening method and device Download PDFInfo
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- CN108194050B CN108194050B CN201810103128.9A CN201810103128A CN108194050B CN 108194050 B CN108194050 B CN 108194050B CN 201810103128 A CN201810103128 A CN 201810103128A CN 108194050 B CN108194050 B CN 108194050B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 239000012530 fluid Substances 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 6
- 230000020477 pH reduction Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910000861 Mg alloy Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910019440 Mg(OH) Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002195 soluble material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Sliding Valves (AREA)
Abstract
The utility model provides an underground sliding sleeve opening method and device, comprising an outer shell (1), a sealing ring, a valve clack seat groove (4), a sliding sleeve valve (5), a shear pin (7), a through hole (8), a valve clack (9), a valve limiting lock (10) and a hinge (11); the sealing ring comprises a first sealing ring (2), a second sealing ring (3) and a third sealing ring (6), and a sliding sleeve valve (5) connected through a shear pin (7) is arranged on the inner wall of the outer shell (1). Compared with the existing sliding sleeve opening mode, the sliding sleeve opening method has the characteristics of simplicity in operation, reliability in opening, low cost and full drift diameter, can improve the oil and gas well yield increase transformation efficiency, and simultaneously reduces the oil and gas exploitation cost.
Description
Technical Field
The utility model relates to the technical field of oil and gas field fracturing acidification reservoir transformation, in particular to a method and a device for opening an underground sliding sleeve.
Background
The contradiction of insufficient oil and gas supply in China is more and more prominent, the petroleum recoverable and easily recoverable reserves are continuously reduced, the exploration and development is forward to the development of deep and unconventional hidden reservoirs, the stratum is more and more complex, the interlayer difference is large, most reservoirs need to be subjected to fracturing acidification transformation in the well completion process, and the fracturing acidification transformation is the most effective measure for solving the interlayer contradiction, improving the oil layer utilization degree and excavating the interlayer potential. With the technical development, the existing oil and gas well generally adopts a staged fracturing and acidizing process, but no reliable fracturing and acidizing process technology at present can give consideration to the problems of low efficiency, multiple underground complex conditions and the like of the existing staged fracturing and acidizing construction because of high efficiency, full drift diameter and avoidance of underground complex conditions.
Although the remote control intelligent sliding sleeve is developed at present, the construction efficiency can be greatly improved, the cost is high, the failure rate is high, and the remote control intelligent sliding sleeve is difficult to apply on a large scale on site. The contradiction of insufficient oil and gas supply in China is more and more prominent, the petroleum recoverable and easily recoverable reserves are continuously reduced, the exploration and development is forward to the development of deep and unconventional hidden reservoirs, the stratum is more and more complex, the interlayer difference is large, most reservoirs need to be subjected to fracturing acidification transformation in the well completion process, and the fracturing acidification transformation is the most effective measure for solving the interlayer contradiction, improving the oil layer utilization degree and excavating the interlayer potential.
With the development of technology, the existing oil and gas well generally adopts a staged fracturing and acidizing process, and for the process, how to improve the construction efficiency of the staged fracturing and acidizing process on the premise of quickly establishing a communication channel between a shaft and a stratum, and reducing the influence of underground complex conditions and later well repair operation is an important problem to be solved. The sliding sleeve is used as a downhole tool capable of communicating/isolating an oil-gas well and formation fluid, and the perforation is used as a method capable of communicating/isolating the oil-gas well and the formation fluid, so that the sliding sleeve is widely applied to a horizontal well staged fracturing acidizing operation tubular column at present.
For the sliding sleeve, the current staged fracturing acidification of the horizontal well of the oil field adopts a mechanical ball-throwing sliding sleeve, a fracturing ball with a corresponding size is needed to be thrown into each stage of sliding sleeve, each stage of sliding sleeve is thrown into the ball from bottom to top in construction, the ball seat inner diameter and the fracturing ball inner diameter of each stage of sliding sleeve are different, the ball seat inner diameter of the sliding sleeve and the fracturing ball inner diameter of the sliding sleeve are increased step by step from bottom to top, the sliding sleeve is complex in structure, small in drift diameter and limited in fracturing stage number; and when the later water production of reservoir, the sliding sleeve can not realize closing and blocking, so that the productivity of the oil and gas well is reduced or even scrapped. For example, "a ball-throwing opening self-locking sliding sleeve", publication No.: CN201972661U, publication date: in 2011, 09 and 14 days, the patent describes that a fracturing sand blasting channel is opened by pitching during horizontal well section operation, and a production channel is kept smooth by locking, but the number of pitching segments is limited.
Patent "double-opening differential pressure sliding sleeve", publication number: CN201723198U, publication date: in 2011, the utility model uses differential pressure to push the upper hydraulic cylinder and the lower hydraulic cylinder to move up and down respectively to open the channel, so that the problem that the ball-throwing sliding sleeve cannot be used for the first section of the horizontal open hole staged fracturing and acidizing tool pipe column can be solved, but the problem that the staged is limited can not be solved.
Based on the method, new mechanical switchable sliding sleeves are developed, the sliding sleeves can be opened by throwing balls or putting into a continuous oil pipe with a switching tool when the fracturing and acidizing construction is carried out, and the sliding sleeves are closed by putting into the continuous oil pipe with the switching tool when water is produced in the later period of a reservoir, so that the sliding sleeves are required to be closed. For example, patent "intelligent slide in a selectively openable slide assembly", publication No.: CN202125290U, publication date: the utility model uses a special switch tool to open and close the sliding sleeve, namely 2012, 01 and 25 days. The greatest problem of the sliding sleeve is that coiled tubing equipment is needed to be used for opening and closing the sliding sleeve by using a coiled tubing tool, the operation cost is high, a great amount of time is needed for operating the coiled tubing, and the method is complex in operation, long in construction period and high in cost. Based on this, but develop remote control's electronic sliding sleeve again, for example patent "be used for horizontal well staged fracturing acidizing to reform transform's ground control underground sliding sleeve device, publication No.: CN104088604a, publication date: on the 10 th and 08 th 2014, the utility model remotely controls the opening and closing of the underground sliding sleeve device by sending control instructions on the ground. The sliding sleeve is simple and convenient to operate, saves time, is complex in structure, high in cost and easy to fail, is limited by design dimensions, and cannot meet the requirement of the full diameter of the tubular column.
In summary, no underground sliding sleeve device can simultaneously meet the requirements of simple operation, reliable opening, low cost and full diameter.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, provides an underground sliding sleeve opening method and device, simultaneously meets the requirements of simplicity in operation, reliability in opening, low cost and full-diameter, and provides the sliding sleeve opening method which has a fluid packing function on a sliding sleeve mechanical structure, does not need ball throwing, and can realize the infinite-level full-diameter reservoir reconstruction function.
The utility model adopts the following technical scheme:
an underground sliding sleeve device comprises an outer shell 1, a sealing ring, a valve clack seat groove 4, a sliding sleeve valve 5, a shear pin 7, a through hole 8, a valve clack 9, a valve limiting lock 10 and a hinge 11; the sealing ring include first sealing washer 2, second sealing washer 3, third sealing washer 6, shell 1 inner wall on be provided with the sliding sleeve valve 5 that links to each other through shear pin 7, be provided with first seal groove, the second seal groove, the third seal groove on the outer wall of sliding sleeve valve 5 and shell 1 contact, first sealing washer 2 sets up in first seal groove, second sealing washer 3 sets up in the second seal groove, third sealing washer 6 sets up in the third seal groove, through-hole 8 has been seted up on the shell 1, through-hole 8 is located between first seal groove and the second seal groove, be provided with valve clack 9 and the valve clack seat groove 4 that corresponds with valve clack 9 on the inner wall of sliding sleeve valve 5, valve clack 9 passes through valve limit lock 10 to be fixed on shell 1, hinge 11 is fixed on sliding sleeve valve 5, valve clack 9 passes through hinge 11 and connects on sliding sleeve valve 5.
Preferably, the valve limit lock 10 is a screw/bolt by which the outer housing 1 is connected to the flap 9.
Further, the valve limit lock 10 is made of a material which is gradually dissolved to be completely dissolved or partially dissolved by chemical reaction with the downhole fluid under the combined action of the downhole environment temperature and the downhole fluid medium.
When the valve limit lock 10 is dissolved, the hinge 11 provides a force for the valve clack 9 to sit smoothly on the valve clack seat groove 4.
Further, a casing/tubing 17 is included, and a downhole sliding sleeve assembly is coupled to the casing/tubing 17 and is run downhole with the casing/tubing 17.
Further, the number of the downhole sliding sleeve devices on the casing/oil pipe 17 is one or more.
The method for opening the underground sliding sleeve comprises the following steps of:
the first step is to fix the valve clack 9 to the outer housing 1 via a valve limit lock 10.
And in the second step, one or more underground sliding sleeve devices are connected to the casing/oil pipe 17, and each underground sliding sleeve device is connected with the casing/oil pipe 17 through threads, and the casing/oil pipe 17 is connected with the casing/oil pipe 17 through threads and is put into the pit.
And thirdly, waiting for a certain time, and after the valve limiting lock 10 is completely or partially dissolved in the pit, the valve clack is automatically seated on the valve clack seat groove 4 under the action of dead weight and the hinge 11 to block the downward flow channel of the sleeve/oil pipe 17.
And fourthly, pumping the casing/oil pipe 17 at the wellhead to build pressure until the pressure difference between the front end and the rear end shears the shear pin 7, moving the sliding sleeve valve 5 downwards, and opening the underground sliding sleeve device when the sealing ring on the sliding sleeve valve 5 no longer seals the fluid inside and outside the casing/oil pipe 17.
Further, the valve limiting lock 10 connects the outer casing 1 and the valve clack 9 in a screw/bolt mode.
Further, after the valve limit lock 10 is dissolved, the hinge 11 provides a force for the valve clack 9 to smoothly seat on the valve clack seat groove 4.
Further, the valve limit lock 10 is made of a material that is gradually dissolved to be completely dissolved or partially dissolved by chemical reaction with the downhole fluid under the combined action of the downhole environment temperature and the downhole fluid medium.
The utility model has the beneficial effects that:
compared with the existing sliding sleeve opening mode, the sliding sleeve opening method has the characteristics of simplicity in operation, reliability in opening, low cost and full drift diameter, can improve the oil and gas well yield increase transformation efficiency, and simultaneously reduces the oil and gas exploitation cost.
Drawings
FIG. 1 is a schematic diagram I of the structure of the present utility model;
FIG. 2 is a schematic diagram II of the structure of the present utility model;
FIG. 3 is a schematic diagram III of the structure of the present utility model;
fig. 4 is a state diagram of the utility model after installation.
In the figure: 1-shell, 2-first sealing ring, 3-second sealing ring, 4-valve clack seat groove, 5-sliding sleeve valve, 6-third sealing ring, 7-shear pin, 8-through hole, 9-valve clack, 10-valve limit lock, 11-hinge, 12-well head, 13-ground, 14-valve clack hole, 15-1 sliding sleeve, 16-2 sliding sleeve, 17-sleeve/oil pipe, 18-n sliding sleeve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1 is a downhole sliding sleeve apparatus structure
As shown in fig. 1, the underground sliding sleeve device comprises an outer shell 1, a sealing ring, a valve clack seat groove 4, a sliding sleeve valve 5, a shear pin 7, a through hole 8, a valve clack 9, a valve limiting lock 10 and a hinge 11.
The sealing ring comprises a first sealing ring 2, a second sealing ring 3 and a third sealing ring 6, and a sliding sleeve valve 5 connected through a shear pin 7 is arranged on the inner wall of the outer shell 1.
Specifically, as shown in fig. 2, 3 and 4, pumping is performed on the ground to a wellhead 12, the pressure difference between the front end and the rear end of a valve clack 9 is increased, when the pressure difference between the front end and the rear end of the valve clack 9 acts on the valve clack 9 and exceeds the shear stress born by a shear pin 7, the shear pin 7 is sheared, a sliding sleeve valve 5 moves downwards, a first sealing ring 2 and a second sealing ring 3 on the sliding sleeve valve 5 do not isolate the internal and external fluid of a sleeve/oil pipe 17 through a sealing through hole 8, and a downhole sliding sleeve device is opened.
As shown in fig. 1, a first sealing groove, a second sealing groove and a third sealing groove are arranged on the outer wall of the sliding sleeve valve 5, which is in contact with the outer shell 1, the first sealing ring 2 is arranged in the first sealing groove, the second sealing ring 3 is arranged in the second sealing groove, the third sealing ring 6 is arranged in the third sealing groove, a through hole 8 is arranged on the outer shell 1, the through hole 8 is positioned between the first sealing groove and the second sealing groove, and when the sliding sleeve device is not opened, the first sealing ring 2 and the second sealing ring 3 can seal fluid in a casing/oil pipe 17 and an annular space (the annular space refers to an annular space formed between the casing/oil pipe 17 and a borehole).
The valve clack 9 and the valve clack seat groove 4 corresponding to the valve clack 9 are arranged on the inner wall of the sliding sleeve valve 5, the valve clack 9 is fixed on the outer shell 1 through the valve limiting lock 10, the hinge 11 is fixed on the sliding sleeve valve 5, and the valve clack 9 is connected on the sliding sleeve valve 5 through the hinge 11.
In the use process, the valve clack 9 is fastened with the outer shell 1 through the valve limiting lock 10 on the ground 13, so that the valve clack 9 cannot move.
Preferably, the valve limiting lock 10 is a screw/bolt, the outer shell 1 and the valve clack 9 are connected through the screw/bolt, and the valve clack hole 14 on the valve clack is a through hole.
Further, the valve limit lock 10 is made of a material which is gradually dissolved to be completely dissolved or partially dissolved by chemical reaction with the downhole fluid under the combined action of the downhole environment temperature and the downhole fluid medium.
The soluble material may be selected from alloys (magnesium alloy, aluminum alloy, etc.) and high molecular polymers. In this case, for example, magnesium alloy, which generally contains a large amount of chloride ions (Cl-) in the liquid in an oil and gas well, is dissolved in an electrolyte solution containing Cl-), and causes the following reaction:
Mg+H + +H 2 O→Mg 2+ +OH - +H 2 ↑
Mg(OH) 2 +2Cl - →MgCl 2 +2OH -
after a certain time, the valve limiting lock 10 is completely dissolved or partially dissolved, so that the mechanical strength of the valve limiting lock 10 cannot bear the reverse action of the gravity of the valve clack 9 and the torque of the hinge 11 to break, the valve clack 9 loses constraint, and the valve clack is automatically seated on the valve clack seat groove 4 under the combined action of the gravity and the hinge 11, so that a downward fluid circulation channel in the sleeve/oil pipe 17 is blocked.
When the valve limit lock 10 is dissolved, the hinge 11 provides a force for the valve clack 9 to sit smoothly on the valve clack seat groove 4.
Further, a casing/tubing 17 is included, and a downhole sliding sleeve assembly is coupled to the casing/tubing 17 and is run downhole with the casing/tubing 17.
Further, as shown in fig. 4, the number 1 sliding sleeve 15, the number 2 sliding sleeve 16, the number … … and the number n sliding sleeve 18 are all connected to the casing/oil pipe 17 through threads, and are sent into the pit along with the pipe column of the casing/oil pipe 17.
Example 2 is a method of opening a downhole sliding sleeve device
An underground sliding sleeve opening method comprises the following steps:
s1, fixing the valve clack 9 on the outer shell 1 through a valve limiting lock 10.
S2, connecting one or more underground sliding sleeve devices on the casing/oil pipe 17, connecting each underground sliding sleeve device with the casing/oil pipe 17 through threads, and connecting the casing/oil pipe 17 with the casing/oil pipe 17 through threads, so that displacement cannot occur, and putting the underground sliding sleeve devices into the well.
As shown in fig. 4, on the surface 13, the oil pipe/casing 17 is connected with the sliding sleeve No. 1 15, the sliding sleeve No. 2 16, the sliding sleeve No. … … and the sliding sleeve No. n 18.
On the ground 13, the valve clack 9 is fastened to the outer housing 1 by a valve limit lock 10 and is not movable.
Further, the valve limit lock 10 is made of a material which is gradually dissolved to be completely dissolved or partially dissolved by chemical reaction with the downhole fluid under the combined action of the downhole environment temperature and the downhole fluid medium.
The soluble material may be selected from alloys (magnesium alloy, aluminum alloy, etc.) and high molecular polymers. In this case, for example, magnesium alloy, which generally contains a large amount of chloride ions (Cl-) in the liquid in an oil and gas well, is dissolved in an electrolyte solution containing Cl-), and causes the following reaction:
Mg+H + +H 2 O→Mg 2+ +OH - +H 2 ↑
Mg(OH) 2 +2Cl - →MgCl 2 +2OH -
preferably, the valve limiting lock 10 connects the outer housing 1 with the valve clack 9 by means of screws/bolts.
And thirdly, waiting for a certain time, and after the valve limiting lock 10 is completely or partially dissolved in the pit, the valve clack is automatically seated on the valve clack seat groove 4 under the action of dead weight and the hinge 11 to block the downward flow channel of the sleeve/oil pipe 17.
And fourthly, pumping the casing/oil pipe 17 at the wellhead to build pressure until the pressure difference between the front end and the rear end shears the shear pin 7, moving the sliding sleeve valve 5 downwards, and opening the underground sliding sleeve device when the sealing ring on the sliding sleeve valve 5 no longer seals the fluid inside and outside the casing/oil pipe 17.
The valve limiting lock 10 in the first step is made of a material which is gradually dissolved to be completely dissolved or partially dissolved under the combined action of the underground environment temperature and the underground fluid medium and chemically reacts with the underground fluid.
When the valve limit lock 10 is dissolved, the hinge 11 provides a force for the valve clack 9 to sit smoothly on the valve clack seat groove 4.
The valve limiting lock 10 in the second step is a screw/bolt, and the outer shell 1 and the valve clack 9 are connected through the screw/bolt
The sliding sleeve and the opening method provided by the utility model are completely different from the existing sliding sleeve opening method, and the similar sliding sleeve opening mode of the technology is a ball-throwing sliding sleeve, but the two technologies are different in that the ball-throwing sliding sleeve needs to throw balls from the ground to the underground, the ball seat of the sliding sleeve is pressed back, the sliding sleeve can be opened, the opening process needs to throw balls by means of the ball, and the mode segmentation stage number is limited. According to the sliding sleeve opening method provided by the technology, the sliding sleeve mechanical structure is provided with the fluid packing function, the ball injection is not needed, and the purpose of infinite-level full-drift-diameter reservoir transformation can be achieved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (3)
1. An underground sliding sleeve device comprises an outer shell (1), a sealing ring, a valve clack seat groove (4), a sliding sleeve valve (5), a shear pin (7), a through hole (8), a valve clack (9), a valve limiting lock (10) and a hinge (11); the sealing ring comprises a first sealing ring (2), a second sealing ring (3) and a third sealing ring (6), and is characterized in that a sliding sleeve valve (5) connected through a shear pin (7) is arranged on the inner wall of the outer shell (1), a first sealing groove, a second sealing groove and a third sealing groove are arranged on the outer wall of the sliding sleeve valve (5) contacted with the outer shell (1), the first sealing ring (2) is arranged in the first sealing groove, the second sealing ring (3) is arranged in the second sealing groove, the third sealing ring (6) is arranged in the third sealing groove, a through hole (8) is formed in the outer shell (1), the through hole (8) is positioned between the first sealing groove and the second sealing groove, a valve clack (9) and a valve clack seat groove (4) corresponding to the valve clack (9) are arranged on the inner wall of the sliding sleeve valve (5), the valve clack (9) is fixed on the outer shell (1) through a valve limiting lock (10), a hinge (11) is fixed on the sliding sleeve valve (5), and the valve clack (9) is connected on the sliding sleeve valve (5) through a hinge (11).
The valve limiting lock (10) is made of a material which is gradually dissolved to be completely dissolved or partially dissolved under the combined action of the underground environment temperature and the underground fluid medium and is subjected to chemical reaction with the underground fluid;
after the valve limiting lock (10) is dissolved, the hinge (11) provides acting force for the valve clack (9) to smoothly seat on the valve clack seat groove (4);
the valve limiting lock (10) is a screw/bolt, and the outer shell (1) is connected with the valve clack (9) through the screw/bolt;
the well casing/oil pipe (17) is connected with the well casing/oil pipe (17) and is sent into the well along with the well casing/oil pipe (17), and the number of the well casing/oil pipe (17) is more than one.
2. An underground sliding sleeve opening method is characterized by comprising the underground sliding sleeve device of claim 1 and is realized by the following steps:
the first step, the valve clack (9) is fixed on the outer shell (1) through a valve limiting lock (10);
connecting more than one underground sliding sleeve device on the sleeve/oil pipe (17), connecting each underground sliding sleeve device with the sleeve/oil pipe (17) through threads, connecting the sleeve/oil pipe (17) with the sleeve/oil pipe (17) through threads, and putting the sleeve/oil pipe into the pit;
thirdly, waiting for a certain time, and after the valve limiting lock (10) is completely or partially dissolved in the pit, the valve clack is automatically seated on the valve clack seat groove (4) under the action of dead weight and the hinge (11), so as to block a downward circulation channel of the sleeve/oil pipe (17);
pumping and injecting pressure in a sleeve/oil pipe (17) of a wellhead (12) until the pressure difference at the front end and the rear end shears a shear pin (7), the sliding sleeve valve (5) moves downwards, a sealing ring on the sliding sleeve valve (5) does not seal the fluid inside and outside the sleeve/oil pipe (17), and the underground sliding sleeve device is opened;
the valve limiting lock (10) in the first step is made of a material which is gradually dissolved to be completely dissolved or partially dissolved under the combined action of the underground environment temperature and the underground fluid medium and is subjected to chemical reaction with the underground fluid;
when the valve limiting lock (10) is dissolved, the hinge (11) provides acting force for the valve clack (9) to smoothly seat on the valve clack seat groove (4).
3. A method of opening a downhole sliding sleeve according to claim 2, wherein the valve limiting lock (10) in the second step is a screw/bolt, by means of which the outer housing (1) is connected to the flap (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103128.9A CN108194050B (en) | 2018-02-01 | 2018-02-01 | Underground sliding sleeve opening method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103128.9A CN108194050B (en) | 2018-02-01 | 2018-02-01 | Underground sliding sleeve opening method and device |
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| Publication Number | Publication Date |
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| CN108194050A CN108194050A (en) | 2018-06-22 |
| CN108194050B true CN108194050B (en) | 2024-02-20 |
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| CN201810103128.9A Active CN108194050B (en) | 2018-02-01 | 2018-02-01 | Underground sliding sleeve opening method and device |
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| CN (1) | CN108194050B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110017133B (en) * | 2019-05-23 | 2024-05-10 | 广州海洋地质调查局 | Method and device for testing output profile of horizontal well and plugging water |
| CN112746834A (en) * | 2021-03-22 | 2021-05-04 | 四川省威沃敦化工有限公司 | Preset casing segmented valve type segmented fracturing method and special tool thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132970A (en) * | 2011-12-05 | 2013-06-05 | 中国石油化工股份有限公司 | Staged fracturing oil tube system and application method thereof |
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| CN104088604A (en) * | 2014-06-18 | 2014-10-08 | 中国石油集团川庆钻探工程有限公司 | Ground control underground sliding sleeve used for staged fracture acidizing transformation of horizontal well |
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| CN208073416U (en) * | 2018-02-01 | 2018-11-09 | 成都众智诚成石油科技有限公司 | A kind of underground sliding sleeve device |
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| US8991505B2 (en) * | 2010-10-06 | 2015-03-31 | Colorado School Of Mines | Downhole tools and methods for selectively accessing a tubular annulus of a wellbore |
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| CN103132970A (en) * | 2011-12-05 | 2013-06-05 | 中国石油化工股份有限公司 | Staged fracturing oil tube system and application method thereof |
| CN103132969A (en) * | 2011-12-05 | 2013-06-05 | 中国石油化工股份有限公司 | Staged fracturing sliding sleeve used for oil well and device and usage method thereof |
| CN104088604A (en) * | 2014-06-18 | 2014-10-08 | 中国石油集团川庆钻探工程有限公司 | Ground control underground sliding sleeve used for staged fracture acidizing transformation of horizontal well |
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| CN206429233U (en) * | 2016-11-28 | 2017-08-22 | 王新岗 | A kind of open hole packer fracturing string of use anti-sticking ball fracturing valve |
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| CN208073416U (en) * | 2018-02-01 | 2018-11-09 | 成都众智诚成石油科技有限公司 | A kind of underground sliding sleeve device |
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| CN108194050A (en) | 2018-06-22 |
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