CN204371274U - Adjustable steam flow control device - Google Patents
Adjustable steam flow control device Download PDFInfo
- Publication number
- CN204371274U CN204371274U CN201420678653.0U CN201420678653U CN204371274U CN 204371274 U CN204371274 U CN 204371274U CN 201420678653 U CN201420678653 U CN 201420678653U CN 204371274 U CN204371274 U CN 204371274U
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- movable float
- steam
- flow
- transmission device
- control device
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Abstract
The utility model provides a kind of adjustable steam flow control device, comprise flow regulator, transmission device, described flow regulator comprises movable float, critical flow nozzle, described critical flow nozzle is enclosed in steam pipe inwall, at critical flow nozzle center, movable float is set, described movable float profile is conical, critical flow nozzle inwall is tubaeform, and movable float, annular space formula runner is formed between critical flow nozzle, described movable float front end connection for transmission device, described transmission device drives the area of passage of movable float axially-movable and then stepless change annular space formula runner to realize steam flow and controls.The axes coincide of described flow regulator, transmission device, steam pipe three; Described movable float circular cone external diameter diminishes from left to right gradually, and the loudspeaker internal diameter of described critical flow nozzle becomes large from left to right gradually.The utility model will substantially increase in heavy crude heat extraction development process, the regulation and control of moist steam and distribution level.
Description
Technical field
The utility model relates to flow control device, especially a kind of adjustable steam flow control device for uphole steam generator outlet or ground feed-line in heavy crude heat extraction process.
Background technology
Earth heavy oil reserves is very abundant, utilizes Thermal Recovery For Viscous Oil By Steam to be a kind of important method of oil recovery by heating, wherein injects the flow of steam and mass dryness fraction and plays a very important role oil well production increasing and increasing economic efficiency.Current on-the-spot individual well steam injection all regulates and controls with the steam flow control valve in steam injection pipe network or stop valve, due in oil field gas injection process, steam quality major part is within the scope of 30-90%, belong to steam water two phase flow, there is steam-water twin phases slip phenomenon, common control valve cannot realize accurate flow control, causes on-the-spot each steam injection branch or steam injection well cannot inject by the flow of design, greatly limit the raising of the oil field gas injection thermal efficiency.
Utility model content
The purpose of this utility model is to provide a kind of adjustable steam flow control device, to greatly improve regulation and control and the distribution level of moist steam in heavy crude heat extraction development process, technical barrier in effective solution oil field development, has obvious technology, price and field conduct advantage in like product in the world.
The purpose of this utility model realizes by following technical measures:
This adjustable steam flow control device comprises flow regulator, transmission device, described flow regulator comprises movable float, critical flow nozzle, described critical flow nozzle is enclosed in steam pipe inwall, at critical flow nozzle center, movable float is set, described movable float profile is conical, critical flow nozzle inwall is tubaeform, and movable float, annular space formula runner is formed between critical flow nozzle, described movable float front end connection for transmission device, described transmission device drives the area of passage of movable float axially-movable and then stepless change annular space formula runner to realize steam flow and controls.
The purpose of this utility model also realizes by following technical measures:
The axes coincide of described flow regulator, transmission device, steam pipe three; Described movable float circular cone external diameter diminishes from left to right gradually, and the loudspeaker internal diameter of described critical flow nozzle becomes large from left to right gradually.
Described transmission device comprises horizontal conveyor gear shaft, the vertical-transmission gear shaft of perpendicular engagement, described horizontal conveyor gear shaft rear end is connected with movable float, and the upper end of described vertical-transmission gear shaft passes the tube wall of steam pipe and mounting strap flow scale shows handwheel dish.
The upper end of described vertical-transmission gear shaft is provided with airtight and watertight padding through the tube wall place of steam pipe, and airtight and watertight padding upper end is provided with pressure cap.
Described steam pipe inside is also provided with fore-stock, after-poppet, and described horizontal conveyor gear shaft front end is connected to fore-stock center, and described movable float rear end is connected to after-poppet center by limit spring.
Described fore-stock and after-poppet are tripod shape at axial direction.
The utility model has following beneficial effect:
Utilize the adjustable oil field ground steam flow control of the principle development and Design of critical flow nozzle, this device is the mass dryness fraction (30-90%) according to oil field ground moist steam, pressure (0-21MPa), the parameters such as temperature (0-370 DEG C) and caliber carry out structure design, ensure each steam injection branch of installing adjustable steam flow control device, the steam flow of every a bite well can distribute by designing requirement, thus improve the thermal recovery effect of oil well, decrease invalid steam injection and saved steam energy consumption, improve single well capacity, and can displace oil field facial canal on the net general according to steam flow control valve.Therefore, the application of this technology will substantially increase regulation and control and the distribution level of moist steam in heavy crude heat extraction development process, efficiently solve the technical barrier in oil field development, have obvious technology, price and field conduct advantage at home and abroad in like product.
Flow rate adjustable scope is 0t/h-23t/h; Adjustable pressure limit is 0-21MPa; Adjustable temperature range is 0-370 DEG C; 4, controllable error is less than 5%.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present utility model.
In figure: 1, tube wall; 2, fore-stock; 3, horizontal conveyor gear shaft; 4, pressure cap annular seal space; 5, flow scale display handwheel dish is with; 6, airtight and watertight padding; 7, vertical-transmission gear shaft; 8, movable float; 9, critical flow nozzle; 10, limit spring; 11, after-poppet.
Detailed description of the invention
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the utility model.
With reference to accompanying drawing 1, adjustable oil field ground steam flow control, fore-stock 2 and after-poppet 11 are together fixed on the inside of tube wall 1, play the effect of the whole internal mechanism of righting, this structure is A-frame structure, horizontal conveyor gear shaft 3 front end is connected with fore-stock 2, rear end and movable float 8 link together, and form transmission mechanism with vertical-transmission gear shaft 7 above, thus control movable float 8 in critical flow nozzle 9, drive limit spring 10 to advance, retreat, reach the object changing the area of passage of steam in critical flow nozzle, thus realize adjustable steam flow controlling organization, wherein pressure cap annular seal space 4 and airtight and watertight padding 6 constitute the effect of a set of sealing vertical-transmission gear shaft 7 polished rod part, and the display handwheel dish 5 with flow scale, above with pointer and tuning drive gear dish, rotate hand wheel type adjustment steam flow simultaneously directly perceived, adjustable steam flow numerical value.Inverse operation flow set is passed through good as the pointer on handwheel dish and needle dial, namely the changes in flow rate between nozzle and float is calculated by vertical teeth wheel shaft and the horizontal teeth wheel shaft anglec of rotation, set the corresponding relation of needle dial and pointer, after setting, only need to carry out rotation hand wheel dish according to set certain flow value that controls to, the flow that electrodeless formula controls steam can be realized.
Its central principle is the characteristic according to steam-water two-phase fluid, utilizes single special flow limited nozzle device, according to steam-water two phase flow theory model calculation of steam flow.Flow limited nozzle is used for the flow of limit fluid or reduces the pressure of fluid.Fluid will produce Pressure Drop by nozzle, is then increased with the increase of Pressure Drop by the flow of nozzle.But exceed certain numerical value when Pressure Drop, namely exceed critical pressure when falling, no matter how outlet pressure reduces, the certain numerical value of maintenance no longer increases by flow.Adjustable oil field ground steam flow control is exactly around this principle, vertical and horizontal gear transmission mechanism is utilized to control movable float overcurrent position in critical flow nozzle, thus according to different steam injection pressures, mass dryness fraction can manual control by the steam flow of this device, thus solve the object that steam flow control valve conventional at present plays adjustment in limited aperture, also solve labyrinth adjusting valve complex structure, the shortcoming large to about 70% mass dryness fraction flow control error simultaneously.
Adjustable oil field ground steam flow control steam flow regulation and control are calculated as follows:
In formula:
The weight flow of w---fluid, kg/h;
C---nozzle orifice coeficient, by Re and do/D value;
D
l---nozzle minimum diameter and nozzle throat size, m;
D
f---float external diameter, float is at external diameter m corresponding to nozzle throat;
D---internal diameter of the pipeline, m;
P
1---pressure before nozzle, Pa;
P
2---pressure or critical limit flowing pressure after nozzle, get its large one, Pa;
M---molecular weight;
Z---compression coefficient, looks into gas compressibility factor figure according to fluid reduced pressure (Pr) reduced temperature Tr and asks for;
T---fluid temperature (F.T.) before nozzle, K;
K---specific heat ratio.
The foregoing is only preferred embodiment of the present utility model, be not used to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.
Claims (6)
1. adjustable steam flow control device, it is characterized in that comprising flow regulator, transmission device, described flow regulator comprises movable float, critical flow nozzle, described critical flow nozzle is enclosed in steam pipe inwall, at critical flow nozzle center, movable float is set, described movable float profile is conical, critical flow nozzle inwall is tubaeform, and movable float, annular space formula runner is formed between critical flow nozzle, described movable float front end connection for transmission device, described transmission device drives the area of passage of movable float axially-movable and then stepless change annular space formula runner to realize steam flow and controls.
2. adjustable steam flow control device according to claim 1, is characterized in that the axes coincide of described flow regulator, transmission device, steam pipe three; Described movable float circular cone external diameter diminishes from left to right gradually, and the loudspeaker internal diameter of described critical flow nozzle becomes large from left to right gradually.
3. adjustable steam flow control device according to claim 1, it is characterized in that described transmission device comprises horizontal conveyor gear shaft, the vertical-transmission gear shaft of perpendicular engagement, described horizontal conveyor gear shaft rear end is connected with movable float, and the upper end of described vertical-transmission gear shaft passes the tube wall of steam pipe and mounting strap flow scale shows handwheel dish.
4. adjustable steam flow control device according to claim 3, it is characterized in that the upper end of described vertical-transmission gear shaft is provided with airtight and watertight padding through the tube wall place of steam pipe, airtight and watertight padding upper end is provided with pressure cap.
5. adjustable steam flow control device according to claim 3, it is characterized in that described steam pipe inside is also provided with fore-stock, after-poppet, described horizontal conveyor gear shaft front end is connected to fore-stock center, and described movable float rear end is connected to after-poppet center by limit spring.
6. adjustable steam flow control device according to claim 5, is characterized in that described fore-stock and after-poppet are tripod shape at axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420678653.0U CN204371274U (en) | 2014-11-07 | 2014-11-07 | Adjustable steam flow control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420678653.0U CN204371274U (en) | 2014-11-07 | 2014-11-07 | Adjustable steam flow control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204371274U true CN204371274U (en) | 2015-06-03 |
Family
ID=53327503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420678653.0U Expired - Fee Related CN204371274U (en) | 2014-11-07 | 2014-11-07 | Adjustable steam flow control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204371274U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626020A (en) * | 2014-11-07 | 2016-06-01 | 中国石油化工股份有限公司 | Adjustable type steam flow control device |
| TWI552941B (en) * | 2015-11-23 | 2016-10-11 | 財團法人工業技術研究院 | Device for transportation of powder |
| CN111075416A (en) * | 2019-12-12 | 2020-04-28 | 中国石油化工股份有限公司 | Gas-liquid equal-dryness constant-flow intelligent regulation and control device |
-
2014
- 2014-11-07 CN CN201420678653.0U patent/CN204371274U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626020A (en) * | 2014-11-07 | 2016-06-01 | 中国石油化工股份有限公司 | Adjustable type steam flow control device |
| CN105626020B (en) * | 2014-11-07 | 2018-08-14 | 中国石油化工股份有限公司 | Adjustable steam volume control device |
| TWI552941B (en) * | 2015-11-23 | 2016-10-11 | 財團法人工業技術研究院 | Device for transportation of powder |
| CN111075416A (en) * | 2019-12-12 | 2020-04-28 | 中国石油化工股份有限公司 | Gas-liquid equal-dryness constant-flow intelligent regulation and control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20211107 |