CN104314544B - Adjustable annular flow injection valve and steam injection string - Google Patents
Adjustable annular flow injection valve and steam injection string Download PDFInfo
- Publication number
- CN104314544B CN104314544B CN201410573695.2A CN201410573695A CN104314544B CN 104314544 B CN104314544 B CN 104314544B CN 201410573695 A CN201410573695 A CN 201410573695A CN 104314544 B CN104314544 B CN 104314544B
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- Prior art keywords
- steam injection
- valve
- steam
- seating nipple
- annular flow
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Classifications
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
Abstract
The invention provides an adjustable annular flow injection valve and a steam injection string. The adjustable annular flow injection valve comprises a working cylinder provided with an accommodating cavity; the accommodating cavity is provided a steam injection valve; the inner side wall of the working cylinder is provided with a limit projection limiting the steam injection valve; an annular steam injection cavity is formed between the working cylinder and the steam injection valve, the side wall of the steam injection valve is provided with steam injection through holes communicating the accommodating cavity and the steam injection cavity, and a first channel communicated with the steam injection cavity is formed on the side wall of the working cylinder; the adjustable annular flow injection valve further comprises a control device to open and close the first channel. The steam injection string comprises the adjustable annular flow injection valves with the heads and tails are connected sequentially in a sealed manner. The adjustable annular flow injection valve is simple in structure, the steam injection quantity can be adjusted during steam configuration, the precipitated dirt is prevented from accumulating, and sands produced by oil wells are prevented from being sucked into the a steam configuration device and are easy to dredge; the steam injection string is capable of injecting steam with different quantities into different steam injecting layers.
Description
Technical field
The present invention relates to a kind of steam drives the steam-matching device of steam injection, particularly to a kind of adjustable annular flow injection allocation valve,
And a kind of steam injection string.
Background technology
Thick oil steam drive steam injection method is the major technique of current heavy crude producing, but due to each heavy crude reservoir feature not
Same, classification is different, in specific recovery process, needs to control different steam injections by steam-matching device.At present, steaming
Vapour drives steam injection valve used in steam injection and mainly adopts form of nozzle, enters work at present by same to nozzle and steam injection valve in work progress
In cylinder, structure is complex, and the steam injection amount during vapour of joining is fixed value.When needing to adjust steam injection amount during joining vapour, need
Want pulling seating nipple.However, causing corrosion and scaling phenomenon because nozzle inside diameter is generally less it is easy to be blocked by incrustation scale, so that
In the pulling workload that scene to steam injection in this layer, therefore, cannot be considerably increased.And the material due to steam injection valve and seating nipple
Relation between material thermal coefficient of expansion, would generally produce locking phenomenon between steam injection valve and seating nipple, even if leading to pulling and running tool
Capture steam injection valve, also salvage motionless, lead to salvage unsuccessfully, thus the steam injection amount of each layer cannot be adjusted.
Content of the invention
In order to overcome complex structure in prior art, during joining vapour, steam injection amount is difficult to adjust, the corrosion in steam injection process
Scale formation and steam injection valve and seating nipple often produce self-locking and are easily caused the problems such as salvage unsuccessfully, and the present invention provides one kind can
Mode annular flow injection allocation valve, can solve the problems, such as by changing steam injection valve to adjust steam injection amount, improve in steam injection process
Corrosion and scaling phenomenon, and avoid steam injection valve and seating nipple to see you later the generation of locking phenomenon.
Steam injection can be carried out to meet to each layer simultaneously, present invention also offers a kind of steam injection string.
The technical solution adopted for the present invention to solve the technical problems is: a kind of adjustable annular flow injection allocation valve, including
Seating nipple, has accommodating cavity in seating nipple, be provided with steam injection valve, the madial wall of seating nipple is provided with can spacing steam injection in accommodating cavity
The limiting stand of valve, is formed with the steam injection chamber of annular between seating nipple and steam injection valve, the side wall of steam injection valve is provided with connection accommodating
Chamber and the steam injection through hole in steam injection chamber, the side wall of seating nipple is provided with the first passage connecting with steam injection chamber；Described adjustable ring
Shape flow injection allocation valve also includes the control device that first passage can be made to be turned on and off.
Multiple steam injection through holes are provided with the side wall of steam injection valve, the gross area sum of all steam injection through holes exists more than steam injection chamber
Projected area in the plane of seating nipple axis, steam injection valve can be changed, and steam injection chamber is perpendicular to seating nipple axis
Projected area in plane can change.
Limiting stand is the ledge structure of annular, and the internal diameter of the epimere of limiting stand is more than the internal diameter of the hypomere of limiting stand, spacing
It is annular transitional face between the epimere of platform and limiting stand hypomere, the lower surface of steam injection valve is tightly connected with this annular transitional face.
First passage be with seating nipple be formed radially 0 ° of oblique through hole to 90 ° of angles.
It is arranged with overcoat outside seating nipple, between seating nipple and overcoat, form the annular space that can connect with first passage, overcoat
Side wall be provided with second channel, described control device includes valve block and spring, and valve block is arranged on the top of annular space, the top of valve block
Face is the inclined-plane corresponding with the outlet of first passage, and spring is arranged between bottom and the bottom of annular space of valve block, spring energy
Make the connection that valve block is resisted against the top of annular space and intercepts between first passage and second channel, when valve block forced compression spring
When, the second channel of sleeve side wall setting can be connected with first passage by annular space.
Second channel is parallel to horizontal plane, and first passage all can be connected with the top of annular space with second channel.
Steam injection valve is tubular, and steam injection through hole is arranged on the barrel of steam injection valve, the side wall of steam injection valve is provided with and can draw in
With the slips ejecting, the top of the inner chamber of seating nipple is provided with the screens platform of ring-shaped step structure, and the internal diameter of the epimere of screens platform is little
In the internal diameter of the hypomere of screens platform, it is annular transitional face between the epimere of screens platform and screens platform hypomere, when slips draws in, note
Steam valve can pass through screens platform；When slips ejects, steam injection valve can be fixed in seating nipple by limiting stand and screens platform.
In steam injection through hole, the base of slips is fixedly connected slips with the lower end of steam injection through hole.
The top surface of slips forms domatic with the mating shapes of the bottom surface of screens platform.
The top of seating nipple is provided with internal thread, and the bottom of seating nipple is provided with external screw thread, and described internal thread and described outer
Screw thread can mate connection.
Another technical scheme of the present invention is, steam injection string, is tightly connected adjustable as above successively including head and the tail
Annular flow injection allocation valve.
The beneficial effect of the present invention adjustable annular flow injection allocation valve is not use nozzle arrangements of the prior art, knot
Structure is simple；By adjusting the cross-sectional area of steam injection chamber annular space, during solving the problems, such as to join vapour, adjust steam injection amount；Can prevent
Only separate out dirty matter to be piled up, protect injection channel；Prevent from sand production suck-back from entering steam-matching device instrument to be caused damage；Using
Slips structure, steam injection valve is easy to salvage；When stopping steam injection, steam injection valve also can be limited in seating nipple, will not eject specific bit
Put.
The beneficial effect of steam injection string of the present invention is to can achieve the steam injection that different steam injection layers are carried out with different steam injection amounts.
Brief description
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of the present invention adjustable annular flow injection allocation valve.
Fig. 2 is the close-up schematic view at steam injection chamber of the present invention position.
Fig. 3 is the structural representation of seating nipple of the present invention.
Fig. 4 is the structural representation of steam injection valve of the present invention.
Fig. 5 is the structural representation of valve block of the present invention.
Description of reference numerals:
1. seating nipple, 10. accommodating cavity, 11. limiting stands, 12. steam injection chambeies, 13. first passages, 14. annular spaces, 15. screens platforms,
2. steam injection valve, 21. steam injection through holes, 22. slips, 3. overcoat, 31. second channels, 4. valve block, 41. inclined-planes, 5. spring.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now comparison brief description this
Bright specific embodiment.
As shown in Figures 1 to 4, the present invention proposes a kind of adjustable annular flow injection allocation valve, including seating nipple 1, works
In cylinder 1, there is accommodating cavity 10, be provided with steam injection valve 2 in accommodating cavity 10, the madial wall of seating nipple 1 is provided with can spacing steam injection valve 2
Limiting stand 11, be formed between seating nipple 1 and steam injection valve 2 annular steam injection chamber 12, the side wall of steam injection valve 2 is provided with connection
Accommodating cavity 10 and the steam injection through hole 21 in steam injection chamber 12, the side wall of seating nipple 1 is provided with the first passage connecting with steam injection chamber 12
13；Described adjustable annular flow injection allocation valve also includes the control device that first passage 13 can be made to be turned on and off.
The present invention does not use nozzle arrangements of the prior art, and is utilized in directly open-minded on the side wall of steam injection valve 2
Steam injection through hole 21, makes the steam injection between accommodating cavity 10, the steam injection through hole 21 of steam injection valve 2, seating nipple 1 and the steam injection valve 2 of seating nipple 1
The first passage 13 of chamber 12 and seating nipple 1 forms injection channel, completes steam injection process.
In a feasible embodiment, the side wall of steam injection valve 2 is provided with multiple steam injection through holes 21, all steam injections are led to
The gross area sum in hole 21 is more than projected area in the plane perpendicular to seating nipple 1 axis for the steam injection chamber 12, and steam injection valve 2 can
Change, projected area in the plane perpendicular to seating nipple 1 axis for the steam injection chamber 12 can change.In the present embodiment, multiple
Steam injection through hole 21 is evenly distributed on the barrel of steam injection valve 2, is equipped with a slips 22, slips 22 in each steam injection through hole 21
For strip, because slips 22 is arranged in steam injection through hole 21, so the excessively stream part of steam injection through hole 21 is rendered as concave shape, institute
The total area of passage sum having steam injection through hole 21 is more than perspective plane in the plane perpendicular to seating nipple 1 axis for the steam injection chamber 12
Long-pending.Adjustable annular flow injection allocation valve of the present invention can be combined with the steam injection valve 2 of multiple various outer diameters, is noted by changing
Steam valve 2, changes the described projected area in steam injection chamber 12, that is, adjust the cross-sectional area of steam injection chamber 12 annular space, solves to join vapour mistake
The problem of steam injection amount is adjusted in journey.
In a specific embodiment, limiting stand 11 is the ledge structure of annular, the internal diameter of the epimere of limiting stand 11
More than the internal diameter of the hypomere of limiting stand 11, it is annular transitional face between the epimere of limiting stand 11 and limiting stand 11 hypomere, steam injection valve 2
Lower surface be tightly connected with this annular transitional face.When steam injection valve 2 is lowered in seating nipple 1, the lower surface of steam injection valve 2 and limit
Form linear sealing between the platform 11 of position.Wherein, limiting stand 11 can adopt overlaying welding technique of carbide alloy, can not only strengthen metal strong
Degree, and fouling and corrosion phenomenon, save resources can be mitigated to greatest extent, also improve operating efficiency simultaneously.
Make first passage 13 be formed as with seating nipple 1 be formed radially 0 ° of oblique through hole to 90 ° of angles, i.e. first lead to
Road 13 is consistent with steam flow direction.In steam injection process, steam flow flows through the surface of first passage 13, the higher situation of steam flow flow velocity
Under, it is prevented from separating out dirty matter and piled up, thus protecting injection channel.At least 2 cylindricality knots are provided with seating nipple 1
The first passage 13 of structure.
It is arranged with overcoat 3 outside seating nipple 1, between seating nipple 1 and overcoat 3, form the ring that can connect with first passage 13
Empty 14, the side wall of overcoat 3 is provided with second channel 31, and described control device includes valve block 4 (as shown in Figure 5) and spring 5, valve block
4 tops being arranged on annular space 14, the top surface of valve block 4 is the inclined-plane 41 corresponding with the outlet of first passage 13, and spring 5 is arranged on
Between the bottom of the bottom of valve block 4 and annular space 14, spring 5 can make valve block 4 be resisted against the top of annular space 14 and intercept first passage
Connection between 13 and second channel 31, when valve block 4 forced compression spring 5, the second channel 31 of overcoat 3 side wall setting can lead to
Cross annular space 14 to connect with first passage 13.When the adjustable annular flow injection allocation valve of the present invention is in non-steam injection working condition,
Valve block 4 can be resisted against the top of annular space 14 by spring 5, thus prevent sand production suck-back from entering steam-matching device to cause to ruin to instrument
Bad, valve block 4 is combined with spring 5 and forms protection with the principle of ball-and-seat to first passage 13.Particularly, second channel 31 is parallel
In horizontal plane, and first passage 13 all can be connected with the top of annular space 14 with second channel 31.
In order to solve the problems, such as steam injection valve 2 be difficult salvage, make steam injection valve 2 be formed as tubular, steam injection through hole 21 is arranged on note
On the barrel of steam valve 2, the side wall of steam injection valve 2 is provided with the slips 22 that can draw in and eject, the top of the inner chamber of seating nipple 1 sets
There is the screens platform 15 of ring-shaped step structure, the internal diameter of the epimere of screens platform 15 is less than the internal diameter of the hypomere of screens platform 15, screens platform
It is annular transitional face between 15 epimere and screens platform 15 hypomere, when slips 22 draws in, steam injection valve 2 can pass through screens platform 15；
When slips 22 ejects, steam injection valve 2 can be fixed in seating nipple 1 by limiting stand 11 and screens platform 15, i.e. steam injection valve 2 is limited
Position is arranged in the annular groove of seating nipple 1 side wall.Even if stop steam injection, steam injection valve 2 also will not eject specified location, this
When it is only necessary to make slips 22 draw in, you can by steam injection valve 2 pass through screens platform 15 thus salvaging from seating nipple 1.Specifically
It is that in steam injection through hole 21, the base of slips 22 is fixedly connected slips 22 with the lower end of steam injection through hole 21.In addition, slips 22
Can also be integrally formed with the side wall of steam injection valve 2.
In order that steam injection valve 2 can firmly be stuck between limiting stand 11 and screens platform 15, slips 22 top surface formed with
The mating shapes of the bottom surface of screens platform 15 domatic.
In addition, being provided with internal thread on the top of seating nipple 1, the bottom of seating nipple 1 is provided with external screw thread, and described internal thread
Connection can be mated with described external screw thread.It is threaded connection, the adjustable annular flow injection allocation valve of the present invention can from beginning to end successively
It is tightly connected formation steam injection string, it is only necessary to the adjustable annular flow injection allocation valve in bottom arranges plug during use, you can
Realize different steam injection layers are carried out with the steam injection of different steam injection amounts.
The use process of the adjustable annular flow injection allocation valve of the present invention is exemplified below.
In work progress, first by the seating nipple 1 without steam injection valve 2 with oil pipe lower going-into-well cylinder, then basis should
The size of the steam injection valve 2 that the steam injection amount needed for block enters under selecting, after entering specified location under steam injection valve 2, the lower end of steam injection valve 2
Form linear sealing and the limiting stand 11 of seating nipple 1 between, because the power suffered by steam injection valve 2 in steam injection process is all a direction,
It is thus able to ensure the accuracy of steam injection amount.
The use process of the steam injection string of the present invention is exemplified below.
After seating nipple 1 is sequentially connected by screw thread head and the tail, with oil pipe lower going-into-well cylinder, then according to different steam injection layers
Requirement to steam injection amount, in different seating nipples 1 under enter various sizes of steam injection valve 2, enter specified location due under steam injection valve 2
Afterwards, linear sealing, therefore each adjustable annular flow injection allocation valve are formed between the limiting stand 11 of the lower end of steam injection valve 2 and seating nipple 1
Between formed and be tightly connected, afterwards, you can carry out steam injection.
The foregoing is only the schematic specific embodiment of the present invention, be not limited to the scope of the present invention.Any
Those skilled in the art, the equivalent variations made on the premise of the design without departing from the present invention and principle and modification, all should
Belong to the scope of protection of the invention.And it should be noted that each part of the present invention be not limited in above-mentioned entirety should
With each technical characteristic described in the specification of the present invention can select one individually to adopt or select multinomial according to actual needs
Combine use, and therefore, the present invention naturally covers other combinations relevant with this case innovative point and concrete application.
Claims (9)
1. a kind of adjustable annular flow injection allocation valve is it is characterised in that described adjustable annular flow injection allocation valve includes seating nipple
(1), it is provided with accommodating cavity (10) in seating nipple (1), in accommodating cavity (10), be provided with steam injection valve (2), the madial wall of seating nipple (1)
It is provided with the limiting stand (11) of the spacing steam injection valve (2) of energy, between seating nipple (1) and steam injection valve (2), be formed with the steam injection chamber of annular
(12), the side wall of steam injection valve (2) is provided with the steam injection through hole (21) of connection accommodating cavity (10) and steam injection chamber (12), seating nipple
(1) first passage (13) being connected with steam injection chamber (12) is provided with side wall；Described adjustable annular flow injection allocation valve also wraps
Include the control device that first passage (13) can be made to be turned on and off, first passage (13) be with seating nipple (1) be formed radially 0 °
Oblique through hole to 90 ° of angles；
Steam injection valve (2) is tubular, and steam injection through hole (21) is arranged on the barrel of steam injection valve (2), and the side wall of steam injection valve (2) is arranged
There is the slips (22) that can draw in and eject, the top of the inner chamber of seating nipple (1) is provided with the screens platform (15) of ring-shaped step structure, card
The internal diameter of the epimere of position platform (15) is less than the internal diameter of the hypomere of screens platform (15), under the epimere of screens platform (15) and screens platform (15)
It is annular transitional face between section, when slips (22) draws in, steam injection valve (2) can pass through screens platform (15)；When slips (22) ejects
When, steam injection valve (2) can be fixed in seating nipple (1) by limiting stand (11) and screens platform (15).
2. adjustable annular flow injection allocation valve according to claim 1 is it is characterised in that set on the side wall of steam injection valve (2)
It is equipped with multiple steam injection through holes (21), the gross area sum of all steam injection through holes (21) is more than steam injection chamber (12) perpendicular to seating nipple
(1) projected area in the plane of axis, steam injection valve (2) can be changed, and steam injection chamber (12) are perpendicular to seating nipple (1) axis
Projected area in plane can change.
3. adjustable annular flow injection allocation valve according to claim 1 is it is characterised in that limiting stand (11) is the platform of annular
Stage structure, the internal diameter of the epimere of limiting stand (11) is more than internal diameter, the epimere of limiting stand (11) and the limit of the hypomere of limiting stand (11)
It is annular transitional face between platform (11) hypomere of position, the lower surface of steam injection valve (2) is tightly connected with this annular transitional face.
4. adjustable annular flow injection allocation valve according to claim 1 is it is characterised in that be arranged with outer outside seating nipple (1)
Set (3), forms the annular space (14) that can connect, the side of overcoat (3) with first passage (13) between seating nipple (1) and overcoat (3)
Wall is provided with second channel (31), and described control device includes valve block (4) and spring (5), and valve block (4) is arranged on annular space (14)
Top, the top surface of valve block (4) is the inclined-plane (41) corresponding with the outlet of first passage (13), and spring (5) is arranged on valve block (4)
Bottom and the bottom of annular space (14) between, spring (5) can make valve block (4) be resisted against the top of annular space (14) and intercept first and lead to
Connection between road (13) and second channel (31), when valve block (4) forced compression spring (5), the of the setting of overcoat (3) side wall
Two passages (31) can be connected with first passage (13) by annular space (14).
5. adjustable annular flow injection allocation valve according to claim 4 is it is characterised in that second channel (31) is parallel to water
Plane, and first passage (13) all can be connected with the top of annular space (14) with second channel (31).
6. adjustable annular flow injection allocation valve according to claim 1 is it is characterised in that slips (22) is located at steam injection through hole
(21), in, the base of slips (22) is fixedly connected with the lower end of steam injection through hole (21).
7. adjustable annular flow injection allocation valve according to claim 1 it is characterised in that slips (22) top surface formed with
The mating shapes of bottom surface of screens platform (15) domatic.
8. adjustable annular flow injection allocation valve according to claim 1 is it is characterised in that the top of seating nipple (1) is arranged
There is internal thread, the bottom of seating nipple (1) is provided with external screw thread, and described internal thread and described external screw thread can mate connection.
9. a kind of steam injection string is it is characterised in that include arbitrary in multiple such as claims 1 to 8 that head and the tail are tightly connected successively
Adjustable annular flow injection allocation valve described in item claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573695.2A CN104314544B (en) | 2014-10-24 | 2014-10-24 | Adjustable annular flow injection valve and steam injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573695.2A CN104314544B (en) | 2014-10-24 | 2014-10-24 | Adjustable annular flow injection valve and steam injection string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104314544A CN104314544A (en) | 2015-01-28 |
| CN104314544B true CN104314544B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410573695.2A Active CN104314544B (en) | 2014-10-24 | 2014-10-24 | Adjustable annular flow injection valve and steam injection string |
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| CN (1) | CN104314544B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401399B (en) * | 2017-08-29 | 2019-06-11 | 中国石油天然气股份有限公司 | Controllable steam injection string |
| CN114109306B (en) * | 2020-08-31 | 2023-11-28 | 中国石油天然气股份有限公司 | Injection valve structure and application method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5052482A (en) * | 1990-04-18 | 1991-10-01 | S-Cal Research Corp. | Catalytic downhole reactor and steam generator |
| CN2648058Y (en) * | 2003-07-01 | 2004-10-13 | 中国石油天然气股份有限公司 | Auto gas distribution valve for thickened oil injecting gas well |
| US7032675B2 (en) * | 2003-10-06 | 2006-04-25 | Halliburton Energy Services, Inc. | Thermally-controlled valves and methods of using the same in a wellbore |
| CN200952384Y (en) * | 2006-08-24 | 2007-09-26 | 潘昌德 | Constant gas injection valve |
| CN101358518B (en) * | 2008-09-03 | 2012-12-19 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Heavy oil thermal recovery balanced steam injection and regulation device |
| CN201963284U (en) * | 2011-03-31 | 2011-09-07 | 中国石油天然气集团公司 | Uniform steam injector |
| CN103075134B (en) * | 2013-01-18 | 2015-11-18 | 中国石油天然气股份有限公司 | Air injection and steam match note tubing string automatically |
| CN204175269U (en) * | 2014-10-24 | 2015-02-25 | 中国石油天然气股份有限公司 | Adjustable annular flow injection allocation valve and steam injection string |
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2014
- 2014-10-24 CN CN201410573695.2A patent/CN104314544B/en active Active
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| CN104314544A (en) | 2015-01-28 |
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