CN112878967A - Water control sieve tube - Google Patents
Water control sieve tube Download PDFInfo
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- CN112878967A CN112878967A CN202110215607.1A CN202110215607A CN112878967A CN 112878967 A CN112878967 A CN 112878967A CN 202110215607 A CN202110215607 A CN 202110215607A CN 112878967 A CN112878967 A CN 112878967A
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- water control
- pipe
- ring
- side wall
- end ring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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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)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a water control sieve tube, wherein the top end of a water control central tube is connected with a connector, the bottom end of the water control central tube is connected with the top end of a base tube through an intermediate connector, an upper end ring and a lower end ring are fixedly sleeved on the base tube, the top end of a sheath is connected with the outer side wall of the connector, and the bottom end of the sheath is inserted with the top of the upper end ring, so that a first annular channel is formed between the water control central tube and the sheath; the water control module is arranged on the water control central pipe and communicated with the water control central pipe; a fixed ring with a check valve is arranged in the first annular channel; the filter sleeve is sleeved on the base pipe and is arranged between the upper end ring and the lower end ring, the top end of the filter sleeve is welded with the upper end ring, and the bottom end of the filter sleeve is welded with the lower end ring, so that a second annular channel is formed between the filter sleeve and the base pipe; the upper end is annularly provided with a liquid passing hole, so that the second annular channel is communicated with the first annular channel. The invention does not need a special packer setting tool, saves the cost, reduces the operation risk, improves the construction efficiency and also ensures the filtering effect of oil gas.
Description
Technical Field
The invention relates to the technical field of oil well filling, in particular to a water control sieve tube.
Background
The conventional water control sieve tube is used for preventing sand through a sieve tube filter medium, and water is controlled through a water control unit arranged inside the sieve tube, so that the function is single. For example, chinese patent No. CN212079271U, publication No. 2020.12.4: bypass prepack screen pipe and packing tubular column, this patent reaches through packing the downthehole sand medium that fills of packing and promotes packing quality, avoids taking place the sand bridge and leads to the fact the influence to filling, but when using conventional water control screen pipe to carry out layering accuse water, need to go into special setting instrument and carry out the setting to the isolation packer between the layer, especially when layering is more, need lift many times and transfer the service pipe post and keep apart the packer between the layer and carry out the setting, and the construction risk is high, the cycle length.
Disclosure of Invention
The invention provides a water control sieve tube, which does not need a special packer setting tool and does not need to lift and lower a service pipe column when layering sand control and water control are carried out, thereby saving the cost, reducing the operation risk, improving the construction efficiency, ensuring the filtering effect during oil gas production and improving the quality of the exploited oil gas.
The technical scheme of the invention is as follows:
a water control sieve tube comprises a connector, a water control central tube, an intermediate connector, a base tube, an upper end ring, a lower end ring, a sheath, a water control module, a fixing ring, a check valve and a filter sleeve;
the top end of the water control central pipe is inserted at the bottom end of the connector and is in sealing connection, the bottom end of the water control central pipe is in sealing connection with the top end of the base pipe through the middle connector, the upper end ring and the lower end ring are fixedly sleeved on the base pipe, and the upper end ring is positioned above the lower end ring;
the inner side wall of the top end of the sheath is hermetically connected with the outer side wall of the connector, and the bottom end of the sheath is hermetically spliced with the top of the upper end ring, so that a first annular channel is formed between the outer side wall of the water control central pipe, the outer side wall of the middle joint, the outer side wall of the base pipe between the upper end ring and the middle joint and the inner side wall of the sheath;
the water control module is arranged in the first annular channel and is arranged on the outer side wall of the water control central pipe to be communicated with the water control central pipe;
the fixing ring is arranged in the first annular channel, is positioned between the water control module and the intermediate joint, is sleeved and mounted on the water control central pipe, an inner ring of the fixing ring is tightly attached to the outer side wall of the water control central pipe in a sealing manner, an outer ring of the fixing ring is tightly attached to the inner side wall of the sheath in a sealing manner, the first annular channel is isolated, the fixing ring is provided with a through hole, and the check valve is mounted in the through hole;
the filter sleeve is sleeved on the base pipe and is arranged between the upper end ring and the lower end ring, the inner side wall of the top end of the filter sleeve is welded with the bottom of the upper end ring, and the inner side wall of the bottom end of the filter sleeve is welded with the top of the lower end ring, so that a second annular channel is formed between the inner side wall of the filter sleeve and the outer side wall of the base pipe between the upper end ring and the lower end ring;
the upper end is annularly provided with a liquid passing hole, so that the second annular channel is communicated with the first annular channel.
When setting the interlayer separation packer, toward the inside liquid injection of water control center tube, make liquid get into the inside of first annular space passageway through water control module, the action of downflow is used on the top of check valve, the check valve is closed under the pressure effect at top this moment, the runner space that the second annular space passageway formed with the lower half section of first annular space passageway in the screen pipe is sealed from inside to outside, inside rising pressure reaches the effect that sets up the interlayer separation packer, effectively realize the sand control water control of layering, need not dedicated setting instrument, need not to lift and transfer the service string, and the cost is saved, the operation risk is reduced, and the construction efficiency is improved.
After the seat seal is accomplished, can produce oil gas, when generating oil gas, the production fluid of oil well bottom passes through the filter sleeve and gets into the second annular space passageway between filter sleeve and the parent tube, and upwards get into first annular space passageway part through the inside liquid hole that crosses of upper end ring, continue to upwelling and act on the bottom of check valve, the check valve is opened under the effect of bottom pressure, the runner space that first annular space passageway and second annular space passageway formed in the screen pipe this moment is communicating from inside to outside, the production fluid flows through the inside that check valve and accuse water module got into accuse water center tube, and then the pipeline of connecting through the connector is exploited ground, filter effect when having promoted oil gas production, make the oil gas quality of exploiting out obtain promoting.
Furthermore, the check valve comprises an upper valve seat, a sealing ball and a lower valve seat, the upper valve seat is welded with the lower valve seat, a communicating flow channel is formed inside the upper valve seat and the lower valve seat, the middle of the flow channel is wide, the two sides of the flow channel are narrow, and the sealing ball is positioned in the wide flow channel between the upper valve seat and the lower valve seat.
Furthermore, the runner port on one side of the upper valve seat is of a slotted structure, and when the sealing ball is tightly attached to the runner on one side of the upper valve seat, liquid flows out of the check valve through a gap between the slotted structure and the runner; the runner port on one side of the lower valve seat is of a ball seat structure, and when the sealing ball is tightly attached to the runner on one side of the lower valve seat, the runner is sealed, and at the moment, liquid cannot pass through the check valve.
When the seat sealing is carried out, liquid flows downwards, flows into the check valve through the runner port of the upper valve seat and acts on the sealing ball, the sealing ball is tightly attached to the runner of the lower valve seat under the action of pressure, the liquid cannot pass through the check valve, and the check valve is in a closed state;
when oil gas is produced, produced liquid flows upwards in a surging mode, flows into the check valve through the runner port of the lower valve seat and acts on the sealing ball, the sealing ball is separated from the lower valve seat under the action of pressure and tightly attached to the runner of the upper valve seat, the runner port on one side of the upper valve seat is of a slotted structure, when the sealing ball is tightly attached to the runner on one side of the upper valve seat, the liquid flows out of the check valve through a gap between the slotted structure and the runner, and the check valve is in an open state.
Furthermore, the fixing ring is provided with a plurality of through holes which are uniformly distributed in a surrounding mode, a check valve is correspondingly installed in each through hole, more check valves are arranged, and the reliability of liquid circulation can be improved.
Furthermore, the water control central pipe is provided with a through hole, and the water control module is communicated with the water control central pipe through the through hole.
The water control module specifically refers to a water control valve, and can be an AICD water control valve or an ICD water control valve; the AICD water control valve is called as a self-adaptive water control valve or an intelligent water control valve, and the flow rate of water and oil is controlled through an internal special flow passage, so that the recovery ratio of the water and the oil is controlled, and the purposes of controlling water and increasing oil are achieved; the ICD water control valve realizes water control by adjusting the size of an internal channel of the water control valve and the number of the water control valves, a water control valve with a smaller channel is used for an oil layer with large water yield, a water control valve with a larger channel is used for an oil layer with small water yield, and the oil layer with small water yield is easier to be exploited during oil and gas exploitation, so that the purposes of water control and oil increase are realized.
Furthermore, the top of accuse water center tube is equipped with the external screw thread, and the bottom inside wall of connector is equipped with the internal thread, and the top of accuse water center tube is pegged graft and is passed through threaded seal at the bottom of connector.
Further, the internal thread is all established to the both ends inside wall of intermediate head, and the bottom of accuse water center tube is equipped with the external screw thread, and the top of parent tube is equipped with the external screw thread, and the bottom of accuse water center tube is pegged graft and is passed through thread sealing at the top of intermediate head and connect, and the top of parent tube is pegged graft and is passed through thread sealing at the bottom of intermediate head.
Further, the upper end ring and the lower end ring are both welded on the outer side wall of the base pipe.
Further, the lateral wall of connector is equipped with the external screw thread, and the top inside wall of sheath is equipped with the internal thread, and the top of sheath passes through thread sealing connection with the connector.
Further, the bottom inside wall of sheath is equipped with the internal thread, and the top lateral wall of top end ring is equipped with the external screw thread, and the top of top end ring is pegged graft and is passed through screw thread sealing connection in the bottom of sheath.
The invention has the beneficial effects that:
when the multifunctional water control sieve tube is used for layered sand control and water control, the flow channel space formed by the first annular channel and the second annular channel in the sieve tube can be sealed from inside to outside by the check valve positioned in the sieve tube, and the interlayer isolation packer can be set by directly pressurizing the inside of the water control center tube without a special setting tool or lifting and lowering a service pipe column, so that the cost is saved, the operation risk is reduced, and the construction efficiency is improved. Meanwhile, when oil gas is produced, after the produced liquid flows into the second annular hollow channel from the filter sleeve, the produced liquid flows upwards to act on the check valve, so that a flow passage space formed by the first annular hollow channel and the second annular hollow channel in the sieve tube is communicated from inside to outside, the produced liquid flows through the check valve and the water control module to enter the water control central tube and then is mined out of the ground, at the moment, the produced liquid can only flow out but not flow in, impurities in an oil well are effectively prevented from falling into the sieve tube, the filtering effect during oil gas production is improved, and the quality of the mined oil gas is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
FIG. 4 is an enlarged schematic view of portion C of FIG. 1
FIG. 5 is a schematic view of a closed state of a check valve;
FIG. 6 is a schematic view of a state in which the check valve is open;
FIG. 7 is a front view of one end of the upper seat with the check valve open;
in the figure: the water control device comprises a connector 1, a water control central pipe 2, an intermediate connector 3, a base pipe 4, an upper end ring 5, a liquid passing hole 501, a lower end ring 6, a jacket 7, a water control module 8, a fixing ring 9, a check valve 10, an upper valve seat 1001, a sealing ball 1002, a lower valve seat 1003, a slotted structure 1004, a filter sleeve 11, a first annular channel 12 and a second annular channel 13.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1-4, a water control screen pipe comprises a connector 1, a water control central pipe 2, an intermediate connector 3, a base pipe 4, an upper end ring 5, a lower end ring 6, a sheath 7, a water control module 8, a fixing ring 9, a check valve 10 and a filter sleeve 11;
the top end of the water control central pipe 2 is provided with an external thread, the inner side wall of the bottom end of the connector 1 is provided with an internal thread, the top end of the water control central pipe 2 is spliced at the bottom end of the connector 1 and is connected through thread sealing, the bottom end of the water control central pipe 2 is provided with an external thread, the top end of the base pipe 4 is provided with an external thread, the inner side walls of the two ends of the intermediate joint 3 are both provided with internal threads, the bottom end of the water control central pipe 2 is spliced at the top end of the intermediate joint 3 and is connected through thread sealing, the top end of the base pipe 4 is spliced at the bottom end of the intermediate joint 3 and is connected through thread sealing, the upper;
the outer side wall of the connector 1 is provided with external threads, the inner side wall of the top end of the sheath 7 is provided with internal threads, the top end of the sheath 7 is connected with the connector 1 in a thread sealing manner, the inner side wall of the bottom end of the sheath 7 is provided with internal threads, the outer side wall of the top part of the upper end ring 5 is provided with external threads, and the bottom end of the sheath 7 is connected with the top part of the upper end ring 5 in a thread sealing manner, so that a first annular channel 12 is formed between the outer side wall of the water control central pipe 2, the outer side wall of the intermediate joint 3, the outer side wall of;
the water control module 8 is arranged in the first annular channel 12 and is arranged on the outer side wall of the water control central pipe 2, the water control central pipe 2 is provided with a through hole, and the water control module 8 is communicated with the water control central pipe 2 through the through hole;
the fixing ring 9 is arranged in the first annular channel 12, is positioned between the water control module 8 and the intermediate joint 3, is sleeved on the water control central pipe 2, the inner ring of the fixing ring 9 is tightly attached to the outer side wall of the water control central pipe 2 in a sealing manner, the outer ring is tightly attached to the inner side wall of the sheath 7 in a sealing manner, the first annular channel 12 is separated, the fixing ring 9 is provided with a through hole, and the check valve 10 is arranged in the through hole;
the filter sleeve 11 is sleeved on the base pipe 4 and is arranged between the upper end ring 5 and the lower end ring 6, the inner side wall of the top end of the filter sleeve 11 is welded with the bottom of the upper end ring 5, and the inner side wall of the bottom end of the filter sleeve 11 is welded with the top of the lower end ring 6, so that a second annular channel 13 is formed between the inner side wall of the filter sleeve 11 and the outer side wall of the base pipe 4 between the upper end ring 5 and the lower end ring 6;
the upper end ring 5 is provided with a liquid through hole 501, so that the second annular channel 13 is communicated with the first annular channel 12.
As shown in fig. 5-7, in the present embodiment, the check valve 10 includes an upper valve seat 1001, a sealing ball 1002 and a lower valve seat 1003, the upper valve seat 1001 and the lower valve seat 1003 are welded together, a communicating flow channel is formed inside the upper valve seat 1001 and the lower valve seat 1003, the flow channel has a wide middle and two narrow sides, the sealing ball 1002 is located in the wide flow channel between the upper valve seat 1001 and the lower valve seat 1003, a flow channel opening on one side of the upper valve seat 1001 is a slotted structure 1004, and when the sealing ball 1002 is tightly attached to the flow channel on one side of the upper valve seat, the liquid flows out of the check valve 10 through a gap between the slotted structure 1004 and the flow channel; the flow passage opening on one side of the lower valve seat 1003 is of a ball seat structure, when the sealing ball 1002 is tightly attached to the flow passage on one side of the lower valve seat 1003, the flow passage is sealed, and at the moment, liquid cannot pass through the check valve 9.
During seating, liquid flows downwards, flows into the check valve 10 through the flow passage of the upper valve seat 1001 and acts on the sealing ball 1002, at the moment, the sealing ball 1002 is tightly attached to the flow passage of the lower valve seat 1003 under the action of pressure, the liquid cannot pass through the check valve 10, and the check valve 10 is in a closed state, as shown in fig. 5; when oil and gas are produced, production liquid surges upwards, flows into the check valve 10 through the flow passage of the lower valve seat 1003, acts on the sealing ball 1002, at the moment, the sealing ball 1002 is separated from the lower valve seat 1003 and is tightly attached to the flow passage of the upper valve seat 1001 under the action of pressure, and when the sealing ball 1002 is tightly attached to the flow passage of the upper valve seat 1001, the liquid flows out of the check valve 10 through a gap between the slotted structure 1004 and the flow passage (as shown by an arrow in fig. 6) because the flow passage on the side of the upper valve seat 1001 is a slotted structure 1004, and the check valve 10 is in an open state as shown in fig. 6 and 7.
In this embodiment, when setting the interlayer separation packer, toward the inside of water control center pipe 2 liquid injection, make liquid pass through water control module 8 and get into the inside of first annular channel 12, the action of flowing down is used in the ball sealer 1002 of check valve 10, ball sealer 1002 pastes down disk seat 1003 under the pressure effect at top this moment, check valve 10 is closed, the runner space that the lower half section of first annular channel 12 and second annular channel 13 formed in the screen pipe is sealed from inside to outside, inside rising pressure reaches the effect that the interlayer separation packer realized the seat seal, effectively realize the sand control of layering and control water, need not special seat seal instrument, need not to lift and lower the service string, the cost is saved, the operation risk has been reduced, and the efficiency of construction is improved.
In this embodiment, after the seat seal is completed, oil gas can be produced, when oil gas is generated, produced liquid at the bottom of an oil well enters the second annular channel 13 between the filter sleeve 11 and the base pipe 4 through the filter sleeve 11, and upwards enters the first annular channel 12 part through the liquid passing hole 501 inside the upper end ring 5, the produced liquid continues to upwelling and acts on the sealing ball 1002 of the check valve 10, the sealing ball 1002 is separated from the lower valve seat 1003 under the action of bottom pressure, the check valve 10 is opened, the flow passage space formed by the first annular channel 12 and the second annular channel 13 in the screen pipe is communicated from inside to outside, the produced liquid flows through the check valve 10 and the water control module 8 to enter the water control central pipe 2, and then the pipeline connected through the connector 1 is exploited out of the ground, the filtering effect during oil gas production is improved, and the quality of the exploited oil gas is improved.
Referring to fig. 2, in the present embodiment, the fixing ring 9 is provided with a plurality of through holes uniformly distributed around, and each through hole is correspondingly provided with a check valve 10, and the number of check valves 10 is large, so that the reliability of liquid circulation can be improved.
In this embodiment, the water control module 8 specifically refers to a water control valve, which may be an AICD water control valve or an ICD water control valve; the AICD water control valve is called as a self-adaptive water control valve or an intelligent water control valve, and the flow rate of water and oil is controlled through an internal special flow passage, so that the recovery ratio of the water and the oil is controlled, and the purposes of controlling water and increasing oil are achieved; the ICD water control valve realizes water control by adjusting the size of an internal channel of the water control valve and the number of the water control valves, a water control valve with a smaller channel is used for an oil layer with large water yield, a water control valve with a larger channel is used for an oil layer with small water yield, and the oil layer with small water yield is easier to be exploited during oil and gas exploitation, so that the purposes of water control and oil increase are realized.
When the multifunctional water control screen pipe is used for layered sand control and water control, the flow passage space formed by the first annular channel 12 and the second annular channel 13 in the screen pipe can be sealed from inside to outside by the check valve 10 positioned in the screen pipe, and the interlayer isolation packer can be set by directly pressurizing the inside of the water control central pipe 2 without a special setting tool or lifting and lowering a service pipe column, so that the cost is saved, the operation risk is reduced, and the construction efficiency is improved. Meanwhile, when oil gas is produced, after the produced liquid flows into the second annular channel 13 from the filter sleeve 11, the produced liquid flows upwards to act on the check valve 10, so that a flow passage space formed by the first annular channel 12 and the second annular channel 13 in the sieve tube is communicated from inside to outside, the produced liquid flows through the check valve 10 and the water control module 8 to enter the water control central tube 2 and then is mined out of the ground, at the moment, the produced liquid can only go out but not go in, impurities in an oil well are effectively prevented from falling into the sieve tube, the filtering effect during oil gas production is improved, and the quality of the mined oil gas is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A water control sieve tube is characterized by comprising a connector, a water control central tube, an intermediate connector, a base tube, an upper end ring, a lower end ring, a sheath, a water control module, a fixing ring, a check valve and a filter sleeve;
the top end of the water control central pipe is inserted at the bottom end of the connector and is in sealing connection, the bottom end of the water control central pipe is in sealing connection with the top end of the base pipe through the middle connector, the upper end ring and the lower end ring are fixedly sleeved on the base pipe, and the upper end ring is positioned above the lower end ring;
the inner side wall of the top end of the sheath is hermetically connected with the outer side wall of the connector, and the bottom end of the sheath is hermetically spliced with the top of the upper end ring, so that a first annular channel is formed between the outer side wall of the water control central pipe, the outer side wall of the middle joint, the outer side wall of the base pipe between the upper end ring and the middle joint and the inner side wall of the sheath;
the water control module is arranged in the first annular channel and is arranged on the outer side wall of the water control central pipe to be communicated with the water control central pipe;
the fixing ring is arranged in the first annular channel, is positioned between the water control module and the intermediate joint, is sleeved and mounted on the water control central pipe, an inner ring of the fixing ring is tightly attached to the outer side wall of the water control central pipe in a sealing manner, an outer ring of the fixing ring is tightly attached to the inner side wall of the sheath in a sealing manner, the first annular channel is isolated, the fixing ring is provided with a through hole, and the check valve is mounted in the through hole;
the filter sleeve is sleeved on the base pipe and is arranged between the upper end ring and the lower end ring, the inner side wall of the top end of the filter sleeve is welded with the bottom of the upper end ring, and the inner side wall of the bottom end of the filter sleeve is welded with the top of the lower end ring, so that a second annular channel is formed between the inner side wall of the filter sleeve and the outer side wall of the base pipe between the upper end ring and the lower end ring;
the upper end is annularly provided with a liquid passing hole, so that the second annular channel is communicated with the first annular channel.
2. The water control screen as recited in claim 1 wherein the check valve includes an upper seat, a sealing ball and a lower seat, the upper seat and the lower seat are welded together, the upper seat and the lower seat define a flow path therebetween, the flow path is wide in the middle and narrow on both sides, and the sealing ball is disposed in the wide flow path between the upper seat and the lower seat.
3. The water control screen as recited in claim 2 wherein the flow port on the side of the upper seat is a slotted structure and when the ball seal abuts the flow channel on the side of the upper seat, fluid exits the check valve through a gap between the slotted structure and the flow channel; the runner port on one side of the lower valve seat is of a ball seat structure, and when the sealing ball is tightly attached to the runner on one side of the lower valve seat, the runner is sealed, and at the moment, liquid cannot pass through the check valve.
4. The water control screen pipe as recited in claim 1 or 3 wherein the retaining ring has a plurality of through holes uniformly distributed around it, each through hole having a check valve correspondingly mounted therein.
5. The water control screen pipe as recited in claim 1 wherein the water control center pipe is perforated with through holes, and the water control modules are in communication with the water control center pipe through the through holes.
6. The water control screen pipe as recited in claim 1 wherein the top end of the water control center pipe is provided with external threads, the inner side wall of the bottom end of the connector is provided with internal threads, and the top end of the water control center pipe is inserted into the bottom end of the connector and is connected with the bottom end of the connector in a sealing manner through threads.
7. The water control screen pipe as recited in claim 1 wherein the inner side walls of the two ends of the middle joint are provided with inner threads, the bottom end of the water control center pipe is provided with outer threads, the top end of the base pipe is provided with outer threads, the bottom end of the water control center pipe is inserted into the top end of the middle joint and is connected with the middle joint in a thread sealing manner, and the top end of the base pipe is inserted into the bottom end of the middle joint and is connected with the middle joint in a thread sealing manner.
8. The water control screen as recited in claim 1 wherein the upper end ring and the lower end ring are welded to an outer sidewall of the base pipe.
9. The water control screen pipe as recited in claim 1 wherein the outer sidewall of the connector is externally threaded and the inner sidewall of the top end of the jacket is internally threaded, the top end of the jacket being in threaded sealing engagement with the connector.
10. The water control screen as recited in claim 1 wherein the inner sidewall of the bottom end of the jacket is internally threaded and the outer sidewall of the top end ring is externally threaded, the top of the top end ring being inserted into the bottom end of the jacket and sealingly engaged by the threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110215607.1A CN112878967A (en) | 2021-02-26 | 2021-02-26 | Water control sieve tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110215607.1A CN112878967A (en) | 2021-02-26 | 2021-02-26 | Water control sieve tube |
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| CN112878967A true CN112878967A (en) | 2021-06-01 |
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| CN202110215607.1A Pending CN112878967A (en) | 2021-02-26 | 2021-02-26 | Water control sieve tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116181282A (en) * | 2023-03-21 | 2023-05-30 | 西南石油大学 | Intelligent well completion inflow control device and method based on Tesla valve |
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| CN112127859A (en) * | 2020-11-02 | 2020-12-25 | 沧州瑞泰石油机械有限公司 | Two-way flow control valve, water control screen pipe and well completion pipe string |
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| CN116181282A (en) * | 2023-03-21 | 2023-05-30 | 西南石油大学 | Intelligent well completion inflow control device and method based on Tesla valve |
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Application publication date: 20210601 |