CN112324387B - But take one-way earial drainage function's switch sandblast sliding sleeve - Google Patents
But take one-way earial drainage function's switch sandblast sliding sleeve Download PDFInfo
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- CN112324387B CN112324387B CN202011373883.2A CN202011373883A CN112324387B CN 112324387 B CN112324387 B CN 112324387B CN 202011373883 A CN202011373883 A CN 202011373883A CN 112324387 B CN112324387 B CN 112324387B
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- sand blasting
- joint
- check valve
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- 238000005488 sandblasting Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000010276 construction Methods 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
Images
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
- E21B43/14—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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- 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)
- Check Valves (AREA)
Abstract
The invention discloses a switchable sand blasting sliding sleeve with a one-way drainage function, which comprises an upper joint, a jackscrew, an upper sliding sleeve, a locking ring, a shear ring, a top cover, a spring, a valve core, a valve body, a split ring, a lower sliding sleeve, a shear pin, a central pipe, an outer barrel, a spring, an outer barrel joint, a split ring, a lower joint and a rubber ring. The sliding sleeve is opened from the outside and closed from the inside. In the gas well layered fracturing, when the hydraulic pressure in the tubular column reaches the opening pressure of the sliding sleeve, the shear pin of the sliding sleeve is sheared short, the outer sliding sleeve moves downwards, and the sand blasting hole is opened. After pressing, when the layer of water is serious, the soluble ball can be directly thrown into the water-saving device, the soluble ball is seated on the ball seat and is pressed, when the pressure reaches the closing pressure of the sliding sleeve, the shearing ring is sheared, the ball seat moves downwards, the sand blasting hole is blocked, and the sliding sleeve is closed. After the sliding sleeve of the layer is closed, fluid flows into the stratum through the check valve, but stratum water cannot flow into a shaft through the check valve, and the fracturing construction of the next layer is not influenced while the sliding sleeve is closed, so that the construction period is shortened, and the construction cost is reduced.
Description
Technical Field
The invention relates to the field of layered fracturing of unconventional oil and gas reservoirs such as petroleum and natural gas, in particular to a switchable sand blasting sliding sleeve with a one-way drainage function.
Background
At present, the sand blasting sliding sleeve and the packer are mainly combined in the layered fracturing modification and production pipe column, and the sand blasting sliding sleeve cannot be closed after being opened. At the present stage, in order to close the sliding sleeve, the sliding sleeve is basically matched with the casing and is put in, and the coiled tubing oil pipe is closed by a switching tool at the later stage, so that the construction period is long.
Along with the continuous development of low-permeability gas fields, gas-water same-layer wells are increased continuously, water outlet wells are more and more common, the problem of high water content of part of reservoirs in certain gas field blocks exists, and for gas layers with serious water outlet, the water outlet layers need to be closed in time after being pressed. If the sliding sleeve corresponding to the water outlet layer is directly closed, the construction period is shortened and the construction cost is reduced while the yield of the fracturing well is not influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a switchable sand blasting sliding sleeve with a one-way drainage function, which is opened hydraulically, a pitching ball is closed, and the sliding sleeve corresponding to a water outlet layer can be directly closed after being pressed for a gas layer with serious water outlet, so that the construction period is shortened and the construction cost is reduced while the yield of a fracturing well is not influenced.
In order to solve the technical problems, the invention adopts the technical scheme that: a switchable sand blasting sliding sleeve with a one-way drainage function comprises an upper joint, a check valve, a central tube and a lower joint which are sequentially connected, wherein a plurality of sand blasting holes used as liquid flow channels are formed in the periphery of the middle of the central tube; the ball seat comprises an upper sliding sleeve, a lower sliding sleeve and a first split ring, the outer wall of the upper part of the lower sliding sleeve is provided with a step for fixing a shear ring, the outer wall of the middle part of the lower sliding sleeve is provided with an annular groove for installing the first split ring, the upper sliding sleeve is inserted on the fixed shear ring of the step of the upper part of the lower sliding sleeve, the outer wall of the upper sliding sleeve is sleeved with a lock ring, and the lower sliding sleeve and the lock ring are detachably arranged on the two sides of the inner wall and the outer wall of the upper sliding sleeve so that the ball seat is fixed on the inner wall of the sand blasting sliding sleeve; the outer sliding sleeve comprises an outer barrel, an outer barrel joint and a second split ring, a plurality of through holes are formed in the periphery of the upper portion of the outer barrel and used for installing shear nails, inclined surface steps are arranged on the inner wall of the outer barrel and used for bearing force, the outer barrel joint is detachably installed on the lower portion of the outer barrel, and an annular groove is formed in the inner wall of the outer barrel joint and used for installing the second split ring; the upper portion inner wall of center tube is opened there is the upper ring groove, and the ball seat is down after the shear ring cuts short, and the first split ring of lower sliding sleeve outer wall installation falls into the upper ring groove, and fixed ball seat, the lower part outer wall of center tube are opened has lower annular groove, and after the shear pin cut short, outer sliding sleeve is down, and the second split ring of outer barrel joint inner wall installation falls into lower annular groove, fixes outer sliding sleeve.
And a plurality of non-through holes are formed around the upper part of the central tube and used for installing shear pins.
The splayed annular groove is formed in the outer portion of the sand blasting hole, the outer diameter of the upper portion of the splayed annular groove of the central pipe is larger than that of the lower portion of the splayed annular groove, and the splayed annular groove is opposite to the inclined surface step of the inner wall of the outer barrel.
The check valve consists of a valve body, a valve core, a first spring and a top cover, wherein the valve body is provided with a stepped hole for assembling the valve core, the first spring and the top cover, one end of the stepped hole close to the inner wall of the valve body is a small-diameter end, one end close to the outer wall of the valve body is a large-diameter end, the center of the top cover is provided with a through hole for assembling the valve core, the periphery of the through hole at the center is also provided with a plurality of through holes for serving as channels for liquid flow, the upper part of the outer wall of the valve core is provided with a boss, the part above the boss is inserted into the small-diameter end of the stepped hole, the boss is inserted into the large-diameter end of the stepped hole, the part below the boss is inserted into the through hole at the center of the top cover in a matching manner, the outer wall of the part below the boss of the valve core is provided with the first spring, one end of the first spring is propped against the surface of the boss of the valve core, the other end is propped against the surface of the top cover, the inner wall of the large-diameter end of the stepped hole of the valve body is connected through threads, and the outer wall of the valve body is locked through spot welding, the valve core and the stepped hole are sealed by a rubber ring.
The upper joint is in threaded connection with the check valve, the check valve is in threaded connection with the central pipe, and the central pipe is in threaded connection with the lower joint and is fixed by a jackscrew.
The upper joint and the check valve, the check valve and the ball seat, the check valve and the central pipe, the ball seat and the central pipe, the central pipe and the outer barrel, and the central pipe and the lower joint are sealed by rubber rings.
And a second spring for providing auxiliary force for the downward movement of the outer sliding sleeve is also arranged between the central pipe and the outer sliding sleeve.
The invention has the beneficial effects that: in the gas well layered fracturing, when the water outlet after the first layer is laminated is serious, the soluble ball can be directly put into the gas well layered fracturing, the sliding sleeve is closed by pressing, and the formation water is prevented from flowing into the oil pipe. After the sliding sleeve of the layer is closed, fluid can flow into the stratum through the check valve, a liquid channel is provided for conveying soluble balls to a ball seat of the sand blasting sliding sleeve of the next layer when the next layer is fractured, but stratum water cannot flow into a shaft through the check valve, and fracturing construction of the next layer is not influenced while the sliding sleeve is closed, so that the construction period is shortened, and the construction cost is reduced.
Drawings
Fig. 1 is a schematic structural view of the switchable sand blasting sliding sleeve with a one-way drainage function.
Figure 2 is an enlarged view of a portion of the locking and shearing rings of figure 1.
Fig. 3 is a schematic view illustrating the opening of the switchable sand blasting sliding sleeve with a one-way drainage function according to the present invention.
Fig. 4 is a schematic closing diagram of the switchable sand blasting sliding sleeve with the one-way drainage function.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used 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 otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, the switchable sand blasting sliding sleeve with the one-way drainage function of the invention comprises an upper joint 21, a check valve, a central tube 33 and a lower joint 38 which are connected in sequence, wherein a plurality of sand blasting holes 40 used as liquid flow channels are formed around the middle part of the central tube 33, an outer sliding sleeve is sleeved on the outer wall of the central tube 33, and in an initial state, the outer sliding sleeve blocks the sand blasting holes 40 to make the sand blasting holes 40 not communicated with the outside of the sand blasting sliding sleeve, and a ball seat is arranged between the upper joint 21 and the central tube 33 on the inner wall of the sand blasting sliding sleeve and blocks the check valve to close the check valve; the ball seat comprises an upper sliding sleeve 23, a lower sliding sleeve 31 and a first split ring 30, the outer wall of the upper part of the lower sliding sleeve 31 is provided with a step for fixing a shear ring 25, the outer wall of the middle part is provided with an annular groove for installing the first split ring 30, the upper sliding sleeve is inserted on the fixed shear ring 25 of the upper step of the lower sliding sleeve 31, a locking ring 24 is sleeved on the outer wall of the upper sliding sleeve 23, and the lower sliding sleeve 31 and the locking ring 24 are detachably arranged on the two sides of the inner wall and the outer wall of the upper sliding sleeve 23, so that the ball seat is fixed on the inner wall of the sand blasting sliding sleeve; the outer sliding sleeve comprises an outer cylinder 34, an outer cylinder joint 36 and a second split ring 37, a plurality of through holes are formed in the periphery of the upper portion of the outer cylinder 34 and used for installing shear nails 32, inclined plane steps are formed in the inner wall of the outer cylinder and used for bearing force, the outer cylinder joint 36 is detachably installed on the lower portion of the outer cylinder 34, and an annular groove is formed in the inner wall of the outer cylinder joint and used for installing the second split ring 37; the upper inner wall of the central tube 33 is provided with an upper annular groove 39, when the shear ring 25 is cut short, the ball seat moves downwards, the first split ring 30 arranged on the outer wall of the lower sliding sleeve falls into the upper annular groove 39 to fix the ball seat, the lower outer wall of the central tube is provided with a lower annular groove 41, when the shear pin is cut short, the outer sliding sleeve moves downwards, and the second split ring 27 arranged on the inner wall of the outer barrel joint falls into the lower annular groove 41 to fix the outer sliding sleeve.
The periphery of the upper part of the central tube 33 is provided with a plurality of non-through holes for installing the shear pins 32.
The splayed annular groove is formed in the outer portion of the sand blasting hole 40, the outer diameter of the upper portion of the splayed annular groove of the central pipe 33 is larger than that of the lower portion of the splayed annular groove, and the splayed annular groove is opposite to the inclined surface step of the inner wall of the outer barrel.
The check valve consists of a valve body 29, a valve core 28, a first spring 27 and a top cover 26, wherein a stepped hole is formed in the valve body 29 and used for assembling the valve core 28, the first spring 27 and the top cover 26, one end of the stepped hole, which is close to the inner wall of the valve body 29, is a small-diameter end, one end of the stepped hole, which is close to the outer wall of the valve body, is a large-diameter end, a through hole is formed in the center of the top cover 26 and used for assembling the valve core 28, a plurality of through holes are formed in the periphery of the through hole in the center and used as a liquid flowing channel, a boss is formed on the upper portion of the outer wall of the valve core, the portion above the boss is inserted into the small-diameter end of the stepped hole, the boss is inserted into the large-diameter end of the stepped hole, the portion below the boss is inserted into the through hole in the center of the top cover in a matching manner, the first spring 27 is arranged on the outer wall of the portion below the boss of the valve core, one end of the first spring is propped against the surface of the boss, the other end of the top cover, the top cover 26 is connected with the inner wall of the large-diameter end of the stepped hole of the valve body 29 through threads, meanwhile, the outer wall is locked by spot welding, and the valve core and the stepped hole are sealed by a rubber ring.
The upper joint is in threaded connection with the check valve, the check valve is in threaded connection with the central pipe, and the central pipe is in threaded connection with the lower joint and is fixed by a jackscrew 22.
The upper joint and the check valve, the check valve and the ball seat, the check valve and the central pipe, the ball seat and the central pipe, the central pipe and the outer barrel, and the central pipe and the lower joint are sealed by rubber rings.
A second spring 35 for providing an auxiliary force for the outer slide to move downwards is also mounted between the central tube 33 and the outer slide.
The assembly steps of the switchable sand blasting sliding sleeve with the one-way drainage function are as follows:
(1) and assembling the check valve, namely firstly installing the rubber ring on the valve core, then installing the valve core in the stepped hole of the valve body, then installing the spring, and finally installing the top cover on the valve core and locking the top cover by spot welding.
(2) And sequentially installing a shear ring and a lock ring on the valve body of the check valve.
(3) And after the rubber ring is arranged on the upper joint, the check valve and the upper joint are connected.
(4) And the rubber ring is arranged on the lower sliding sleeve and the central pipe, then the split ring is arranged on the lower sliding sleeve and inserted into the central pipe, and the central pipe and the check valve are connected until the lower sliding sleeve is pushed against the shear ring.
(5) An upper sliding sleeve is inserted into the upper joint, and a special tool is adopted to connect the upper sliding sleeve and the lower sliding sleeve until the upper sliding sleeve is pushed against the shear ring.
(6) The outer sleeve is fitted over the outer wall of the central tube and the spring is then inserted between the central tube and the outer sleeve.
(7) The split ring is arranged in the outer cylinder joint, and then the outer cylinder joint is arranged on the outer wall of the central pipe to connect the outer cylinder joint and the outer cylinder, so that the spring is in a compressed state.
(9) Aligning the non-through hole on the outer wall of the central tube and the through hole on the outer barrel, and installing a plurality of shear pins in the holes.
(10) The lower joint is mounted at the lower end of the center tube.
(11) And the jackscrews are arranged at the upper end and the lower end of the check valve and the upper end of the upper joint.
So far, but take one-way earial drainage function's switch sandblast sliding sleeve to assemble and accomplish.
The switchable sand blasting sliding sleeve with the one-way drainage function has the following working principle:
(1) when liquid flows into the switchable sand blasting sliding sleeve with the one-way drainage function, the liquid can enter the space between the central pipe and the outer sliding sleeve from the sand blasting hole in the central pipe, the pressure generated by the liquid acts on the inclined plane of the inner wall of the outer barrel of the outer sliding sleeve, when the pressure is increased to the set value of 25MPa, the shear pin between the central pipe and the outer barrel is sheared short, the outer sliding sleeve moves downwards, and the sand blasting hole is opened, as shown in fig. 3.
(2) And performing fracturing construction on the layer.
(3) After fracturing construction is finished, gas is tested on the layer, whether the stratum produces water or not is detected, if the stratum produces water, the sliding sleeve is closed, and if the stratum does not produce water, the next layer of fracturing construction is directly carried out. Putting in the matched soluble ball, sending the soluble ball to a ball seat of the sliding sleeve at a certain discharge capacity, pressurizing, cutting off the shear ring when the pressure reaches the closing pressure of the sliding sleeve of 15MPa, enabling the ball seat to move downwards, plugging the sand blasting hole, and closing the sliding sleeve, as shown in figure 4.
(4) After the sand blasting hole is closed, the liquid in the oil pipe flows into the stratum through the check valve, and the stratum water cannot flow into the oil pipe through the check valve. When the pressure difference between the inside and the outside of the check valve reaches more than 1.5MPa, the spring of the check valve is compressed, the valve core moves outwards, and liquid flows out from the stepped hole of the valve body through the through hole of the top cover. When the pressure difference between the inside and the outside of the check valve is less than 1.5MPa, the part above the valve core boss is inserted into the small-diameter end of the stepped hole again due to the elasticity of the spring, so that the closing of the check valve is realized.
In summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.
Claims (6)
1. A switchable sand blasting sliding sleeve with a one-way drainage function is characterized by comprising an upper joint (21), a check valve, a central pipe (33) and a lower joint (38) which are sequentially connected, wherein a plurality of sand blasting holes (40) used as liquid flow channels are formed in the periphery of the middle part of the central pipe (33), an outer sliding sleeve is sleeved on the outer wall of the central pipe (33), the outer sliding sleeve blocks the sand blasting holes (40) in an initial state, so that the sand blasting holes (40) are not communicated with the outside of the sand blasting sliding sleeve, and a ball seat is arranged between the upper joint (21) and the central pipe (33) on the inner wall of the sand blasting sliding sleeve and blocks the check valve to close the check valve; the ball seat comprises an upper sliding sleeve (23), a lower sliding sleeve (31) and a first split ring (30), the outer wall of the upper part of the lower sliding sleeve (31) is provided with a step for fixing a shear ring (25), the outer wall of the middle part of the lower sliding sleeve is provided with an annular groove for installing the first split ring (30), the upper sliding sleeve is inserted on the fixed shear ring (25) of the step of the upper part of the lower sliding sleeve (31), a locking ring (24) is sleeved on the outer wall of the upper sliding sleeve (23), and the lower sliding sleeve (31) and the locking ring (24) are detachably installed on the inner wall and two sides of the outer wall of the upper sliding sleeve (23) so that the ball seat is fixed on the inner wall of the sand blasting sliding sleeve; the outer sliding sleeve comprises an outer cylinder (34), an outer cylinder joint (36) and a second split ring (37), a plurality of through holes are formed in the periphery of the upper portion of the outer cylinder (34) and used for installing shear nails (32), the inner wall of the outer cylinder is provided with inclined surface steps used for bearing force, the outer cylinder joint (36) is detachably installed on the lower portion of the outer cylinder (34), and the inner wall of the outer cylinder joint is provided with an annular groove used for installing the second split ring (37); an upper annular groove (39) is formed in the inner wall of the upper portion of the central tube (33), when the shear ring (25) is cut short, the ball seat moves downwards, a first split ring (30) installed on the outer wall of the lower sliding sleeve falls into the upper annular groove (39), the ball seat is fixed, a lower annular groove (41) is formed in the outer wall of the lower portion of the central tube, when the shear pin is cut short, the outer sliding sleeve moves downwards, a second split ring (37) installed on the inner wall of the outer barrel joint falls into the lower annular groove (41), and the outer sliding sleeve is fixed; the check valve consists of a valve body (29), a valve core (28), a first spring (27) and a top cover (26), wherein a stepped hole is formed in the valve body (29) and used for assembling the valve core (28), the first spring (27) and the top cover (26), one end, close to the inner wall of the valve body (29), of the stepped hole is a small-diameter end, one end, close to the outer wall of the valve body, of the stepped hole is a large-diameter end, a through hole is formed in the center of the top cover (26) and used for assembling the valve core (28), a plurality of through holes are formed in the periphery of the through hole in the center and used as liquid flowing channels, a boss is formed on the upper portion of the outer wall of the valve core, a part above the boss is inserted into the small-diameter end of the stepped hole, the boss is inserted into the large-diameter end of the stepped hole, a part below the boss is inserted into the through hole in the center of the top cover in a matching manner, the outer wall of the part below the boss of the valve core is provided with the first spring (27), one end of the first spring is pushed to the surface of the boss of the valve core, the other end of the valve body is propped against the surface of the top cover, the top cover (26) is in threaded connection with the inner wall of the large-diameter end of the stepped hole of the valve body (29), the outer wall of the valve body is locked by spot welding, and the valve core and the stepped hole are sealed by a rubber ring.
2. The switchable sand blasting sliding sleeve with the one-way drainage function according to claim 1, wherein a plurality of non-through holes are formed around the upper portion of the central tube (33) for installing shear pins (32).
3. The switchable sand blasting sliding sleeve with the one-way drainage function according to claim 1, wherein a splayed annular groove is formed outside the sand blasting hole (40), the outer diameter of the upper part of the splayed annular groove of the central tube (33) is larger than that of the lower part of the splayed annular groove, and the splayed annular groove is opposite to the inclined step of the inner wall of the outer cylinder.
4. The switchable sand blasting sliding sleeve with the one-way drainage function according to claim 1, wherein the upper joint and the check valve, the check valve and the central pipe, and the central pipe and the lower joint are connected through threads and fixed through a jackscrew (22).
5. The switchable sandblasting sliding sleeve with one-way drainage function as claimed in claim 1, wherein the upper joint and the check valve, the check valve and the ball seat, the check valve and the central tube, the ball seat and the central tube, the central tube and the outer cylinder, and the central tube and the lower joint are sealed by rubber rings.
6. The switchable sandblasting sliding sleeve with one-way drainage function as claimed in claim 1, wherein a second spring (35) for providing auxiliary force for the downward movement of the outer sliding sleeve is further installed between the central tube (33) and the outer sliding sleeve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011373883.2A CN112324387B (en) | 2020-11-30 | 2020-11-30 | But take one-way earial drainage function's switch sandblast sliding sleeve |
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| CN202011373883.2A CN112324387B (en) | 2020-11-30 | 2020-11-30 | But take one-way earial drainage function's switch sandblast sliding sleeve |
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| CN112324387B true CN112324387B (en) | 2022-03-11 |
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| CN116084905B (en) * | 2023-03-13 | 2023-07-18 | 大庆市璞庆钻采设备制造有限公司 | Sand blaster for oilfield stratum fracturing |
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| CN101699029A (en) * | 2009-11-06 | 2010-04-28 | 安东石油技术（集团）有限公司 | High-pressure clamped sealing gas injection tool being used for leak detection of tube column and having function of trip prevention |
| CN201851082U (en) * | 2010-10-25 | 2011-06-01 | 张川民 | Fully-functional anti-spray oil drain device |
| CN201924905U (en) * | 2010-12-23 | 2011-08-10 | 中国石油集团渤海钻探工程有限公司 | Differential pressure open sliding sleeve for horizontal well fracturing |
| CN203050621U (en) * | 2013-01-07 | 2013-07-10 | 中国石油大学(华东) | Switchable pitching drive crushing sliding sleeve |
| US10301907B2 (en) * | 2015-09-28 | 2019-05-28 | Weatherford Netherlands, B.V. | Setting tool with pressure shock absorber |
| CN107829709A (en) * | 2017-11-11 | 2018-03-23 | 中石化石油工程技术服务有限公司 | New Model Pressure Controlled Full Bore Testing Valve |
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