CN208966312U - Reversible steam injection pipe column - Google Patents
Reversible steam injection pipe column Download PDFInfo
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- CN208966312U CN208966312U CN201821310970.1U CN201821310970U CN208966312U CN 208966312 U CN208966312 U CN 208966312U CN 201821310970 U CN201821310970 U CN 201821310970U CN 208966312 U CN208966312 U CN 208966312U
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- steam injection
- valve body
- steam
- reversible
- inner sleeve
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 289
- 230000002441 reversible effect Effects 0.000 title claims abstract description 59
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000003129 oil well Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000010779 crude oil Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 96
- 239000010410 layer Substances 0.000 description 28
- 238000002347 injection Methods 0.000 description 16
- 239000007924 injection Substances 0.000 description 16
- 238000011084 recovery Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides a reversible steam injection pipe column, it includes packer, reversible steam injection valve and lower packer, reversible steam injection valve includes valve body and break-make subassembly, the valve body has the steam injection passageway, the outside seal cover of valve body is equipped with the overcoat, form the annular space between overcoat and the valve body, be equipped with steam inlet, steam injection pipe, backstop portion and steam vent on the lateral wall of valve body, the break-make subassembly includes first break-make spare and second break-make spare, first break-make spare has the first operating position of shutoff steam injection pipe, and the second operating position that supports with backstop portion; the second on-off part is provided with a first steam injection port and a second steam injection port, the second on-off part is provided with a first steam injection position for plugging the steam inlet and a second steam injection position abutted against the first on-off part, when the second on-off part is positioned at the second steam injection position, the first steam injection port is communicated with the steam inlet, and the second steam injection port is communicated with the steam injection pipe. The utility model discloses can reach the steam injection volume of design and can not influence the production time rate and the oil well crude oil output of oil well again.
Description
Technical field
The utility model relates to the thermal recoveries in petroleum production engineering to match vapour technical field, in particular to a kind of reversible steam injection string.
Background technique
Thickened oil steam-stimulated exploitation causes longitudinally to employ unbalanced due to reservoir permeability difference, it is therefore desirable to according to
Each layer geology characteristic carries out multi-zone flow regulating steam.For well of handling up, the opportunity of multi-zone flow regulating steam the early more is conducive to improve
The balance degree of reservoir producing.But some well, due to hypertonia, single layer is often infused not with steam injection into not finishing halfway
Steam injection design flow thus influences the positive service work and crude output of heat note boiler.
Utility model content
The purpose of the utility model is to provide one kind can guarantee heat note boiler positive service work and crude output can
Inverse steam injection string.
A kind of in order to achieve the above object, the utility model provides reversible steam injection string, include at least from top to bottom according to
The upper packer of secondary connection, reversible steam injection valve and lower packet, the reversible steam injection valve include at least:
Valve body, have axially through steam injection channel, the upper packer and the lower packet are connected to institute
The external sealing shroud of the upper and lower ends of valve body, the valve body is equipped with housing, and forms annular space between the housing and the valve body,
The side wall of the valve body is from top to bottom successively arranged air intake, steam injection pipe, stopper section and steam drain, the air intake and the row
Steam ports is connected with the annular space, and the stopper section is located in the steam injection channel, the first end of the steam injection pipe and the note
Vapour channel is connected, and the second end of the steam injection pipe is along the outside for extending radially to the housing of the valve body；
On-off component comprising be set in the valve body and can be moved along the axial seal of the valve body from the bottom to top
First on-off part and the second on-off part, the first on-off part, which has, to be connected to the steam injection channel and blocks the of the steam injection pipe
One operating position and abutting second operating position of stopper section, are located at second working position in the first on-off part
In the state of setting, the first on-off part blocks the steam injection channel, and the steam injection pipe is connected to the steam injection channel；Described
Two-way broken piece is equipped with the first steam injection mouth and the second steam injection mouth, and the second on-off part, which has, to be connected to the steam injection channel and block
First steam injection position of the air intake and the second steam injection position for abutting the first on-off part, in second on-off
Part is located in the state of second steam injection position, and the first steam injection mouth is connected with the air intake, second steam injection
Mouth is connected with the steam injection pipe.
Reversible steam injection string as described above, wherein the first on-off part includes the first inner sleeve and the first ball sealer, institute
It states to be placed in first at first operating position and be connected by the first shear pin with the valve body, and first inner sleeve
The inner surface of outer peripheral surface and the valve body, which seals, to be cooperated, and first inner sleeve has the first axis being connected to the steam injection channel
Through hole, first ball sealer can be tightly connected with the first axis through hole, by first ball sealer with it is described
The sealed connection of first axis through hole, it is mobile by the first operating position that first inner sleeve can cut first shear pin
To the second operating position；
The second on-off part includes the second inner sleeve and the second ball sealer, is placed on first steam injection position in described second
Place is connected by the second shear pin with the valve body, and the inner surface of the outer peripheral surface of second inner sleeve and the valve body seals
Cooperation, second inner sleeve have the second axial pass-through holes being connected to the steam injection channel, and first ball sealer can pass through
Second axial pass-through holes, second ball sealer can be tightly connected with second axial pass-through holes, first steam injection
Mouth and the second steam injection mouth are set on the side wall of second inner sleeve, axially by second ball sealer and described second
The sealed connection of through hole, second inner sleeve can cut second shear pin and be moved to the second note by the first steam injection position
Vapour position.
Reversible steam injection string as described above, wherein the first axis through hole is in undergauge shape tapered from top to bottom,
And the bottom end internal diameter of the first axis through hole is less than the diameter of first ball sealer.
Reversible steam injection string as described above, wherein the lower end surface of second axial pass-through holes is circumferentially to contract
The baffle ring with a central hole formed, the center-hole diameter of the baffle ring are less than the diameter of second ball sealer, and the gear
The center-hole diameter of ring is greater than the diameter of first ball sealer.
Reversible steam injection string as described above, wherein the stopper section is the ring being set on the inner wall of the valve body
Shape boss, the internal diameter of the annular convex platform are less than the outer diameter of first inner sleeve.
Reversible steam injection string as described above, wherein the steam injection channel is up big and down small stepped hole, and the steam injection
The lower inner diameter in channel is less than the outer diameter of first inner sleeve, and the step surface in the steam injection channel forms the stopper section.
Reversible steam injection string as described above, wherein the side wall upper part of the valve body is circumferentially spaced equipped with multiple described
The quantity of air intake, the first steam injection mouth is identical as the quantity of the air intake, the lower sidewall of the valve body circumferentially between
Every equipped with multiple steam drains.
Reversible steam injection string as described above, wherein circumferentially-spaced along the valve body is equipped with multiple steam injection pipes, institute
The quantity for stating the second steam injection mouth is identical as the quantity of the steam injection pipe.
Reversible steam injection string as described above, wherein the reversible steam injection valve further includes top connection, under the top connection
Portion is equipped with external screw thread, and the top of the valve body is equipped with internal screw thread, passes through the cooperation that is screwed on of the external screw thread and the internal screw thread, institute
It states valve body to connect with the top connection, the reversible steam injection valve is connected by the top connection with the upper packer.
Reversible steam injection string as described above, wherein the reversible steam injection string further includes being connected to the upper packer
Upper end telescoping tube.
Compared with prior art, as follows the advantages of the utility model:
Reversible steam injection string provided by the utility model, it is real by changing the position of the first on-off part and the second on-off part
Independent oil reservoir steam injection to the lower part is showed, individually to top oil reservoir steam injection or simultaneously to top oil reservoir and bottom oil layer steam injection, no
It will increase operating cost and task difficulty, when the larger injection of formation pressure is difficult on top, by changing the first on-off part and the
The position of two-way broken piece makes upper and lower two oil reservoirs inject steam together, to reach design steam injection amount and not influence oil well
Production time efficiency and oil well crude oil yield.
Detailed description of the invention
Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model
It encloses.Wherein:
Fig. 1 is the structural schematic diagram for the reversible steam injection string that an embodiment of the present invention provides；
Fig. 2 is a using state structure diagram of reversible steam injection valve in reversible steam injection string shown in FIG. 1；
Fig. 3 is another using state structure diagram of reversible steam injection valve in reversible steam injection string shown in FIG. 1.
Drawing reference numeral explanation:
10, reversible steam injection valve；1, valve body；11, steam injection channel；12, air intake；13, steam injection pipe；14, stopper section；15, it arranges
Steam ports；2, housing；3, annular space；4, the first on-off part；41, the first inner sleeve；411, first axis through hole；42, the first ball sealer；
43, the first shear pin；5, the second on-off part；51, the second inner sleeve；511, the second axial pass-through holes；5111, baffle ring；512,
One steam injection mouth；513, the second steam injection mouth；52, the second ball sealer；53, the second shear pin；6, top connection；71, the first sealing ring；
72, the second sealing ring；20, upper packer；30, lower packet；40, telescoping tube；100, top oil reservoir；200, bottom oil layer.
Specific embodiment
In order to have clearer understanding to the technical solution of the utility model, purpose and effect, now in conjunction with Detailed description of the invention sheet
The specific embodiment of utility model.
As shown in Figure 1, Figure 2 and Figure 3, the utility model provides a kind of reversible steam injection string, and main application is upper and lower
In the oil well of two layers of steam injection, which includes at least from top to bottom sequentially connected upper packer 20, reversible steam injection
Valve 10 and lower packet 30, reversible steam injection valve 10 include at least valve body 1 and on-off component, in which:
Valve body 1 have axially through steam injection channel 11, steam injection channel 11, which is formed, injects steam for oil reservoir 200 to the lower part
The first injection channel, upper packer 20 and lower packet 30 be connected to the upper and lower ends of valve body 1, specifically, valve body 1
Upper and lower ends pass through oil pipe respectively and connect with upper packer 20 and lower packet 30, in use, upper packer 20 is located at top oil
The top of layer 100, to prevent steam from entering the space of 100 or more top oil reservoir, lower packet 30 be located at top oil reservoir 100 and
Between bottom oil layer 200, steam can be avoided to enter top oil reservoir 100 by lower packet 30, and lower packet 30 can be passed through
One oil reservoir is divided into two steam injection units up and down to recover the oil, the specific structure of upper packer 20 and lower packet 30 and is set
Principle is the prior art, and details are not described herein, and the external sealing shroud of valve body 1 is equipped with housing 2, and shape between housing 2 and valve body 1
At annular space 3, the side wall of valve body 1 is from top to bottom successively arranged air intake 12, steam injection pipe 13, stopper section 14 and steam drain 15, into vapour
Mouth 12 and steam drain 15 are connected with annular space 3, i.e., air intake 12, annular space 3 and steam drain 15 are sequentially communicated to be formed for the lower part
Oil reservoir 200 injects the second injection channel of steam, and the upper and lower ends of the second injection channel are upper with the first injection channel respectively
Portion is connected with lower part, and stopper section 14 is located in steam injection channel 11, and the first end of steam injection pipe 13 is connected with steam injection channel 11, note
The second end of steam pipe 13 is along the outside for extending radially to housing 2 of valve body 1, i.e., steam injection pipe 13 is formed for top oil reservoir 100
The third injection channel of steam injection, the steam in the first injection channel can flow into top oil reservoir 100 via third injection channel, and by
In the setting of upper packer 20 and lower packet 30, so that can only enter top oil reservoir from the steam that third injection channel is flowed out
100；
On-off component includes being set in valve body 1 from the bottom to top and can be along the first on-off that the axial seal of valve body 1 is moved
Part 4 and the second on-off part 5, the first on-off part 4 have connection steam injection channel 11 and block steam injection pipe 13 the first operating position, with
And abut the second operating position of stopper section 14, in the state that the first on-off part 4 is located at the second operating position, the first on-off part
4 block steam injection channel 11, and steam injection pipe 13 is connected to steam injection channel 11；Second on-off part 5 is equipped with the first steam injection mouth 512 and second
Steam injection mouth 513, the second on-off part 5 have connection steam injection channel 11 and block the first steam injection position of air intake 12 and abut
Second steam injection position of the first on-off part 4, in the state that the second on-off part 5 is located at the second steam injection position, the first steam injection mouth 512
It is connected with air intake 12, the second steam injection mouth 513 is connected with steam injection pipe 13, by changing the first on-off part 4 and the second on-off
Independent 200 steam injection of oil reservoir to the lower part may be implemented, individually to 100 steam injection of top oil reservoir or simultaneously to top oil in the position of part 5
Layer 100 and 200 steam injection of bottom oil layer；
Specifically, when in use, the upper end of reversible steam injection string is first connected into lower drain line, then makes reversible steam injection pipe
Column is lowered into purpose of horizon with oil pipe, at this point, upper packer 20 is located at 100 top of top oil reservoir, lower packet 30 is located at top
Between oil reservoir 100 and bottom oil layer 200, the lower end in steam injection channel 11 is connected to bottom oil layer 200, the second end of steam injection pipe 13 with
Top oil reservoir 100 is connected to, and the first on-off part 4 is located at the first operating position, and the second on-off part 5 is located at the first steam injection position, due to
First on-off part 4 has blocked steam injection pipe 13, the second on-off part 5 has blocked air intake 12, therefore, injects steam in steam injection channel 11
The oil recovery of bottom oil layer 200 can only be entered via the lower end in steam injection channel 11, after bottom oil layer 200 has injected design quantity of steam,
It controls the first on-off part 4 and is moved to the second operating position, at this point, the first on-off part 4 abuts with stopper section 14 and blocked steam injection
Channel 11, prevent steam is from bottom oil layer 200 of entering in injection steam injection channel 11, and the movement of the first on-off part 4 is opened
Steam injection pipe 13 so that steam injection pipe 13 is connected to steam injection channel 11, inject in steam injection channel 11 steam can only by steam injection pipe 13 into
Enter the oil recovery of top oil reservoir 100, stops infusing stewing well after having infused the steam of design flow；When the larger injection of the pressure of top oil reservoir 100 is difficult
When, in order to guarantee oily well yield, the second on-off part 5 of control is moved to the second steam injection position, at this point, the second on-off part 5 and the
One on-off part 4 abuts, and the first steam injection mouth 512 is connected with air intake 12, and the second steam injection mouth 513 is connected with steam injection pipe 13,
And since the first on-off part 4 is still in the second operating position, cause injection channel to be still blocked, therefore, injects steam injection channel 11
Interior a part of steam can enter annular space 3 by the first steam injection mouth 512 and air intake 12, via annular space 3, steam drain 15 and steam injection
The bottom in channel 11 enters the oil recovery of bottom oil layer 200, and another part steam can be by the second steam injection mouth 513 and via steam injection pipe 13
It recovers the oil into top oil reservoir 100.
Reversible steam injection string provided by the utility model, by changing the position of the first on-off part 4 and the second on-off part 5,
Realize independent 200 steam injection of oil reservoir to the lower part, individually to 100 steam injection of top oil reservoir or simultaneously to top oil reservoir 100 and lower part
200 steam injection of oil reservoir, not will increase operating cost and task difficulty, when on top, the larger injection of 100 pressure of oil reservoir is difficult, by changing
The position for becoming the first on-off part 4 and the second on-off part 5 makes upper and lower two oil reservoirs inject steam together, to reach design
Steam injection amount does not influence the production time efficiency and oil well crude oil yield of oil well again.
In a preferred embodiment of the utility model, as shown in Figures 2 and 3, the first on-off part 4 includes first
Inner sleeve 41 and the first ball sealer 42, the first inner sleeve 41 are connected by the first shear pin 43 with valve body 1 at the first operating position,
And first inner sleeve 41 outer peripheral surface and the inner surface of valve body 1 seal and cooperate, it is preferred that the outer peripheral surface of the first inner sleeve 41 and valve body 1
Inner surface between be equipped with the first sealing ring 71, the first inner sleeve 41 has the first axis through hole that is connected to steam injection channel 11
411, the first ball sealer 42 can be tightly connected with first axis through hole 411, be penetrated through by the first ball sealer 42 with first axis
The sealed connection in hole 411, the first inner sleeve 41 can cut the first shear pin 43 and be moved to the second working position by the first operating position
It sets, specifically, the first inner sleeve 41 is limited at the first operating position by the first shear pin 43, when 200 note of bottom oil layer
After having entered design quantity of steam, the first ball sealer 42, the first ball sealer 42 and first axis are put into first axis through hole 411
Through hole 411 is tightly connected, i.e., the first ball sealer 42 blocks first axis through hole 411, and outer due to the first inner sleeve 41
The inner surface of circumferential surface and valve body 1, which seals, to be cooperated, so that the first inner sleeve 41 and the first ball sealer 42 block steam injection channel 11, at this time
Since steam constantly injects in steam injection channel 11, the pressure in the steam injection channel 11 on 41 top of the first inner sleeve is caused constantly to increase
Add, when cutting pressure of the pressure increase to the first shear pin 43, the first shear pin 43 is cut, and is equipped with the first closure
First inner sleeve 41 of ball 42 is moved downward under the action of steam pressure to abut with stopper section 14, i.e. the first on-off part 4 is by
One operating position is moved to the second operating position, at this point, steam injection pipe 13 is connected to steam injection channel 11, since steam injection channel 11 is by
One on-off part 4 blocks can not inject steam to lower layer, and steam can only enter top oil reservoir 100 via steam injection pipe 13 and recover the oil, and realize
Oil production by layer；
Second on-off part 5 includes the second inner sleeve 51 and the second ball sealer 52, and the second inner sleeve 51 is led at the first steam injection position
It crosses the second shear pin 53 to connect with valve body 1, and the inner surface of the outer peripheral surface of the second inner sleeve 51 and valve body 1 seals and cooperates, preferably
, the second sealing ring 72 is equipped between the outer peripheral surface of the second inner sleeve 51 and the inner surface of valve body 1, the second inner sleeve 51 has and steam injection
The second axial pass-through holes 511 that channel 11 is connected to, the first ball sealer 42 can pass through the second axial pass-through holes 511, the second ball sealer
52 can be tightly connected with the second axial pass-through holes 511, and the first steam injection mouth 512 and the second steam injection mouth 513 are set to the second inner sleeve 51
Side wall on, by the sealed connection of the second ball sealer 52 and the second axial pass-through holes 511, the second inner sleeve 51 can cut second and cut
It cuts pin 53 and second steam injection position is moved to by the first steam injection position, specifically, when the larger injection of the pressure of top oil reservoir 100
When difficult, in order to guarantee oily well yield, the second ball sealer 52, the second ball sealer 52 are put into the second axial pass-through holes 511
It is tightly connected with the second axial pass-through holes 511, i.e., the second ball sealer 52 blocks the second axial pass-through holes 511, and the second inner sleeve
51 outer peripheral surface and the inner surface of valve body 1 seal and cooperate, so that the second inner sleeve 51 and the second ball sealer 52 are also by steam injection channel 11
Blocking, steam can not by the second on-off part 5, at this time since steam constantly injects in steam injection channel 11, cause be located at second
Pressure is continuously increased in the steam injection channel 11 on 51 top of inner sleeve, when cutting pressure of the pressure increase to the second shear pin 53,
Second shear pin 53 is cut, and the second inner sleeve 51 for being equipped with the second ball sealer 52 moves down under the action of steam pressure
To abutting with the first inner sleeve 41, i.e., the second on-off part 5 is moved to the second steam injection position by the first steam injection position, at this point, steam injection is logical
Road 11 is blocked can not be injected steam to lower layer simultaneously by the first on-off part 4 and the second on-off part 5, and is located in the second on-off part 5
In the state of second steam injection position, the first steam injection mouth 512 is connected with air intake 12, the second steam injection mouth 513 and 13 phase of steam injection pipe
Connection, therefore, a part of steam injected in steam injection channel 11 can enter annular space 3 by the first steam injection mouth 512 and air intake 12,
Enter bottom oil layer 200 via the bottom of annular space 3, steam drain 15 and steam injection channel 11 to recover the oil, another part steam can pass through
Second steam injection mouth 513 simultaneously enters the oil recovery of top oil reservoir 100 via steam injection pipe 13, realizes that two oil reservoirs inject steam together up and down and adopts
Oil, to reach design steam injection amount and not influence the production time efficiency and oil well crude oil yield of oil well.
Certainly, the first on-off part 4 and the second on-off part 5 can also use ball valve, set on the valve body 1 of the second on-off part 5
There are the first steam injection mouth 512 and the second steam injection mouth 513, ball valve can connect with valve body 1 by shear pin, can also pass through
Electromagnet connects with valve body 1, and the on-off by controlling ball valve realizes the first on-off part 4 and the second on-off part 5 and steam injection channel 11
Connection or blocking build the pressure, pin is cut by steam pressure or overcomes the first on-off of magnetic force moving part 4 and the second on-off part 5
It is mobile, realize that individually 200 steam injection of oil reservoir is recovered the oil to the lower part, individually to the oil recovery of 100 steam injection of top oil reservoir or simultaneously to upper and lower two
A oil reservoir injects steam-assisted recovery together.
Further, first axis through hole 411 is in tapered undergauge shape from top to bottom, and first axis through hole 411
Bottom end internal diameter less than the first ball sealer 42 diameter so that investment the first ball sealer 42 after, the first ball sealer 42 is in steam pressure
Under the action of can with first axis through hole 411 realize fit closely, thus effectively block steam injection channel.
Further, the gear with a central hole that the lower end surface of the second axial pass-through holes 511 is circumferentially formed to contract
Ring 5111, the center-hole diameter of baffle ring 5111 is less than the diameter of the second ball sealer 52, and the center-hole diameter of baffle ring 5111 is greater than
The diameter of first ball sealer 42, the first ball sealer 42 can pass through the first axis through hole that baffle ring 5111 enters the first inner sleeve 41
411, the second ball sealer 52 blocks the second axial pass-through holes 511 of closure to make to further block steam channel by baffle ring 5111
The steam for obtaining 5 top of the second on-off part can only make the second on-off part 5 be moved to the second steam injection position cutting off the second shear pin 53
It postpones, injects two up and down simultaneously via annular space 3 and steam injection pipe 13 respectively by the first steam injection mouth 512 and the second steam injection mouth 513
Oil reservoir recovers the oil.
It should be noted that the tool that the lower end surface of first axis through hole 411 can also be made circumferentially to be formed to contract
There are the baffle ring 5111 of centre bore, diameter of the center-hole diameter less than the first ball sealer 42 of baffle ring 5111, the second axial pass-through holes
511 in undergauge shape tapered from top to bottom, and the bottom end internal diameter of first axis through hole 411 is straight less than the second ball sealer 52
Diameter, the bottom end internal diameter of first axis through hole 411 are greater than the diameter of the first ball sealer 42, enable the first ball sealer 42 across the
Two axial pass-through holes 511 enter first axis through hole 411.
In a specific embodiment of embodiment, as shown in Fig. 2, stopper section 14 is the inner wall for being set to valve body 1
Annular convex platform on face, the internal diameter of annular convex platform less than the first inner sleeve 41 outer diameter so that the first inner sleeve 41 is in steam pressure
It when being moved down under effect, is limited, cannot be continued to move to by annular convex platform, block steam drain 15 to avoid the first inner sleeve 41,
To ensure that reversible steam injection string can simultaneously to upper and lower two oil reservoirs steam injection simultaneously, in addition, the structure of annular convex platform is simple,
Convenient for the processing and manufacturing of valve body 1, and since annular convex platform and valve body 1 are integrally formed, the use that annular convex platform has been effectively ensured is strong
Degree.
In another specific embodiment of embodiment, steam injection channel 11 is up big and down small stepped hole, and steam injection
The lower inner diameter in channel 11 is less than the outer diameter of the first inner sleeve 41, and the step surface in steam injection channel 11 forms stopper section 14, so that first
It when inner sleeve 41 moves down under the action of steam pressure, is limited, cannot be continued to move to by step surface, equally can be avoided
One inner sleeve 41 blocks steam drain 15, ensure that reversible steam injection string can be simultaneously to upper and lower two oil reservoirs while steam injection.
In a specific embodiment of embodiment, as shown in Fig. 2, in order to enable steam to uniformly enter annular space
3, the side wall upper part of valve body 1 is circumferentially spaced to be equipped with multiple air intakes 12, it is preferable that and multiple air intakes 12 are arranged at equal intervals, and first
The quantity of steam injection mouth 512 is identical as the quantity of air intake 12, so that each air intake 12 can pass through after the second inner sleeve 51 is mobile
The the first steam injection mouth 512 communicated therewith is connected with steam injection channel 11, so that steam can uniformly enter in annular space 3,
In order to enable the steam in annular space 3 can be discharged as early as possible, it is circumferentially spaced equipped with multiple steam drains in the lower sidewall of valve body 1
15, the steam in annular space 3 passes through multiple discharges rapidly of steam drains 15, it is preferred that the quantity of steam drain 15 and the number of air intake 12
It measures identical.
In a specific embodiment of embodiment, in order to improve individually to the efficiency of 100 steam injection of top oil reservoir, edge
The circumferentially-spaced of valve body 1 is equipped with multiple steam injection pipes 13, it is preferred that multiple steam injection pipes 13 are arranged at equal intervals, the second steam injection mouth 513
Quantity is identical as the quantity of steam injection pipe 13, so that each steam injection pipe 13 can pass through the second steam injection mouth after the second inner sleeve 51 is mobile
Steam is uniformly injected into top oil reservoir 100 and recovers the oil by 513, to improve oil recovery efficiency.
In a kind of embodiment of the utility model, the both ends of housing 2 are welded on valve body 1, and the mode of welding is simple
Reliably, and it can effectively ensure that the leakproofness of annular space 3.
In a kind of embodiment of the utility model, reversible steam injection valve 10 further includes top connection 6, the lower part of top connection 6
Equipped with external screw thread, the top of valve body 1 is equipped with internal screw thread, by the cooperation that is screwed on of external screw thread and internal screw thread, valve body 1 and top connection 6
Connect, valve body 1 can be connected by top connection 6 with other component, also, since the inner wall of top connection 6 protrudes from the interior table of valve body 1
Face enables top connection 6 to play restriction effect to the first on-off part 4 and the second moving up for on-off part 5, and avoiding can in upper mention
When inverse steam injection string, the first on-off part 4 and the second on-off part 5 fall off, and reversible steam injection valve 10 passes through top connection 6 and upper packer
20 connect, so that the connection between reversible steam injection valve 10 and upper packer 20 is simple and convenient.
In a kind of embodiment of the utility model, reversible steam injection string further includes the upper end for being connected to upper packer 20
Telescoping tube 40, telescoping tube 40 can prevent due to tubing string is by thermal stretching removing seal for packer to lose packing effect, it is preferred that stretch
The top of the draw 40 is connected with the instlated tubular of steam injection.
The course of work of the reversible steam injection string of the utility model is illustrated with reference to the accompanying drawing:
As shown in Figure 1, Figure 2 and Figure 3, the telescoping tube 40 of reversible steam injection string connects with lower drain line, and by under oil pipe
It is put into the oil well of upper layer and lower layer steam injection, upper packer 20 is connected with the upper end of valve body 1 by oil pipe and is located at top oil reservoir 100
Top, lower packet 30 are connected with the lower end of valve body 1 by oil pipe and are located between top oil reservoir 100 and bottom oil layer 200, note
The lower end in vapour channel 11 is connected to bottom oil layer 200, and the second end of steam injection pipe 13 is connected to top oil reservoir 100, the first inner sleeve 41
Positioned at the first operating position, the second inner sleeve 51 is located at the first steam injection position, since the first inner sleeve 41 has blocked steam injection pipe 13, second
Inner sleeve 51 has blocked air intake 12, and therefore, injecting steam in steam injection channel 11 can only be via under the entrance of the lower end in steam injection channel 11
Portion's oil reservoir 200 recovers the oil, after bottom oil layer 200 has injected design quantity of steam, to the first axis through hole 411 of the first inner sleeve 41
The first ball sealer 42 of interior investment, the first ball sealer 42 are tightly connected with first axis through hole 411, i.e. the first ball sealer 42 is by the
One axial pass-through holes 411 block, and cooperate since the inner surface of the outer peripheral surface of the first inner sleeve 41 and valve body 1 seals, so that first
Inner sleeve 41 and the first ball sealer 42 block steam injection channel 11, at this time since steam constantly injects in steam injection channel 11, lead to position
It is continuously increased in pressure in the steam injection channel 11 on 41 top of the first inner sleeve, when pressure increase to the cutting pressure of the first shear pin 43
When power, the first shear pin 43 is cut, be equipped with the first inner sleeve 41 of the first ball sealer 42 under the action of steam pressure to
Under be moved to and abutted with annular convex platform, i.e., the first on-off part 4 is moved to the second operating position by the first operating position, at this point, note
Steam pipe 13 is connected to steam injection channel 11, since steam injection channel 11 is blocked by the first on-off part 4 and can not be injected steam, steam to lower layer
Top oil reservoir 100 can only be entered via steam injection pipe 13 to recover the oil；
When the larger injection of the pressure of top oil reservoir 100 is difficult, in order to guarantee oily well yield, to the of the second inner sleeve 51
The second ball sealer 52 is put into two axial pass-through holes 511, the second ball sealer 52 and the second axial pass-through holes 511 are tightly connected, i.e.,
Second ball sealer 52 blocks the second axial pass-through holes 511, and the outer peripheral surface of the second inner sleeve 51 and the inner surface sealing of valve body 1 are matched
Close so that the second inner sleeve 51 and the second ball sealer 52 be also by the blocking in steam injection channel 11, steam can not by the second on-off part 5,
At this time since steam constantly injects in steam injection channel 11, cause the pressure in the steam injection channel 11 on 51 top of the second inner sleeve continuous
Increase, when cutting pressure of the pressure increase to the second shear pin 53, the second shear pin 53 is cut, and is equipped with the second envelope
Second inner sleeve 51 of stifled ball 52 is moved downward under the action of steam pressure to abut with the first inner sleeve 41, i.e. the second on-off part 5
Second steam injection position is moved to by the first steam injection position, at this point, steam injection channel 11 is same by the first on-off part 4 and the second on-off part 5
When block and can not inject steam, and in the state that the second on-off part 5 is located at the second steam injection position, the first steam injection mouth to lower layer
512 are connected with air intake 12, and the second steam injection mouth 513 is connected with steam injection pipe 13, therefore, inject one in steam injection channel 11
Divide steam that can enter annular space 3 by the first steam injection mouth 512 and air intake 12, via annular space 3, steam drain 15 and steam injection channel 11
Bottom enter bottom oil layer 200 oil recovery, another part steam can by the second steam injection mouth 513 and via steam injection pipe 13 enter it is upper
Portion's oil reservoir 100 recovers the oil, and realizes that two oil reservoirs inject steam-assisted recovery together up and down.
In conclusion reversible steam injection string provided by the utility model, by changing the first on-off part and the second on-off part
Position, realize individually to the lower part oil reservoir steam injection, individually to top oil reservoir steam injection or simultaneously to top oil reservoir and lower part oil
Layer steam injection, not will increase operating cost and task difficulty, logical by changing first when on top, the larger injection of formation pressure is difficult
The position of broken piece and the second on-off part makes upper and lower two oil reservoirs inject steam together, to be to have reached design steam injection amount again not
Influence the production time efficiency and oil well crude oil yield of oil well.
The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model
It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model
Change and modify, should belong to the range of the utility model protection.And it should be noted that the utility model each component part
It is not limited in above-mentioned overall applicability, each technical characteristic described in the specification of the utility model can select according to actual needs
It selects one and individually uses or select the multinomial use that combines, therefore, the utility model covers and this crime in the nature of things
The related other combinations of bright point and concrete application.
Claims (10)
1. a kind of reversible steam injection string, which is characterized in that the reversible steam injection string includes at least sequentially connected from top to bottom
Upper packer, reversible steam injection valve and lower packet, the reversible steam injection valve include at least:
Valve body, have axially through steam injection channel, the upper packer and the lower packet are connected to institute's valve body
Upper and lower ends, the external sealing shroud of the valve body is equipped with housing, and forms annular space between the housing and the valve body, described
The side wall of valve body is from top to bottom successively arranged air intake, steam injection pipe, stopper section and steam drain, the air intake and the steam drain
It is connected with the annular space, the stopper section is located in the steam injection channel, and the first end and the steam injection of the steam injection pipe are logical
Road is connected, and the second end of the steam injection pipe is along the outside for extending radially to the housing of the valve body；
On-off component comprising be set to can move in the valve body and along the axial seal of the valve body first from the bottom to top
On-off part and the second on-off part, the first on-off part have the first work for being connected to the steam injection channel and blocking the steam injection pipe
Make position and abut second operating position of stopper section, is located at second operating position in the first on-off part
Under state, the first on-off part blocks the steam injection channel, and the steam injection pipe is connected to the steam injection channel；Described second is logical
Broken piece is equipped with the first steam injection mouth and the second steam injection mouth, and the second on-off part, which has, to be connected to described in the steam injection channel and closure
First steam injection position of air intake and the second steam injection position for abutting the first on-off part, in the second on-off part position
In the state of second steam injection position, the first steam injection mouth is connected with the air intake, the second steam injection mouth with
The steam injection pipe is connected.
2. reversible steam injection string according to claim 1, which is characterized in that
The first on-off part includes the first inner sleeve and the first ball sealer, is placed at first operating position and leads in described first
It crosses the first shear pin to connect with the valve body, and the outer peripheral surface of first inner sleeve and the inner surface sealing of the valve body are matched
Close, first inner sleeve has the first axis through hole that is connected to the steam injection channel, first ball sealer can with it is described
First axis through hole is tightly connected, described by the sealed connection of first ball sealer and the first axis through hole
First inner sleeve can cut first shear pin and be moved to the second operating position by the first operating position；
The second on-off part includes the second inner sleeve and the second ball sealer, is placed at first steam injection position and leads in described second
It crosses the second shear pin to connect with the valve body, and the outer peripheral surface of second inner sleeve and the inner surface sealing of the valve body are matched
It closes, second inner sleeve has the second axial pass-through holes being connected to the steam injection channel, and first ball sealer can pass through institute
The second axial pass-through holes are stated, second ball sealer can be tightly connected with second axial pass-through holes, the first steam injection mouth
It is set to the second steam injection mouth on the side wall of second inner sleeve, is axially passed through by second ball sealer with described second
The sealed connection of through-hole, second inner sleeve can cut second shear pin and be moved to the second steam injection by the first steam injection position
Position.
3. reversible steam injection string according to claim 2, which is characterized in that
The first axis through hole is in undergauge shape tapered from top to bottom, and the bottom end internal diameter of the first axis through hole is small
In the diameter of first ball sealer.
4. reversible steam injection string according to claim 2, which is characterized in that
The baffle ring with a central hole that the lower end surface of second axial pass-through holes is circumferentially formed to contract, the baffle ring
Center-hole diameter is less than the diameter of second ball sealer, and the center-hole diameter of the baffle ring is greater than first ball sealer
Diameter.
5. reversible steam injection string according to claim 2, which is characterized in that
The stopper section is the annular convex platform being set on the inner wall of the valve body, and the internal diameter of the annular convex platform is less than described
The outer diameter of first inner sleeve.
6. reversible steam injection string according to claim 2, which is characterized in that
The steam injection channel is up big and down small stepped hole, and the lower inner diameter in the steam injection channel is less than first inner sleeve
The step surface of outer diameter, the steam injection channel forms the stopper section.
7. reversible steam injection string according to claim 2, which is characterized in that
The side wall upper part of the valve body it is circumferentially spaced be equipped with multiple air intakes, the quantity of the first steam injection mouth with it is described
The quantity of air intake is identical, and the lower sidewall of the valve body is circumferentially spaced to be equipped with multiple steam drains.
8. reversible steam injection string according to claim 2, which is characterized in that
Circumferentially-spaced along the valve body is equipped with multiple steam injection pipes, the quantity of the second steam injection mouth and the steam injection pipe
Quantity is identical.
9. reversible steam injection string according to any one of claim 1 to 8, which is characterized in that
The reversible steam injection valve further includes top connection, and the lower part of the top connection is equipped with external screw thread, and the top of the valve body is equipped with
Internal screw thread, by the cooperation that is screwed on of the external screw thread and the internal screw thread, the valve body connects with the top connection, described reversible
Steam injection valve is connected by the top connection with the upper packer.
10. reversible steam injection string according to any one of claim 1 to 8, which is characterized in that
The reversible steam injection string further includes the telescoping tube for being connected to the upper end of the upper packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821310970.1U CN208966312U (en) | 2018-08-15 | 2018-08-15 | Reversible steam injection pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821310970.1U CN208966312U (en) | 2018-08-15 | 2018-08-15 | Reversible steam injection pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208966312U true CN208966312U (en) | 2019-06-11 |
Family
ID=66752968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821310970.1U Active CN208966312U (en) | 2018-08-15 | 2018-08-15 | Reversible steam injection pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208966312U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469287A (en) * | 2019-07-17 | 2019-11-19 | 中国石油天然气股份有限公司 | A kind of injection well Multifunctional blowout-prevention setting ball seat and its working method |
| CN114575810A (en) * | 2020-12-01 | 2022-06-03 | 中国石油天然气股份有限公司 | Layered treatment and layered steam injection process pipe column |
-
2018
- 2018-08-15 CN CN201821310970.1U patent/CN208966312U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469287A (en) * | 2019-07-17 | 2019-11-19 | 中国石油天然气股份有限公司 | A kind of injection well Multifunctional blowout-prevention setting ball seat and its working method |
| CN114575810A (en) * | 2020-12-01 | 2022-06-03 | 中国石油天然气股份有限公司 | Layered treatment and layered steam injection process pipe column |
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