CN104747122A - Throttle valve for downhole liquid level control - Google Patents
Throttle valve for downhole liquid level control Download PDFInfo
- Publication number
- CN104747122A CN104747122A CN201310743940.5A CN201310743940A CN104747122A CN 104747122 A CN104747122 A CN 104747122A CN 201310743940 A CN201310743940 A CN 201310743940A CN 104747122 A CN104747122 A CN 104747122A
- Authority
- CN
- China
- Prior art keywords
- spool
- valve body
- liquid level
- valve
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000009837 dry grinding Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 238000011084 recovery Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 17
- 239000007924 injection Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 13
- 238000000926 separation method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 235000020681 well water Nutrition 0.000 description 3
- 239000002349 well water Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 230000001746 atrial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a throttle valve for downhole liquid level control. The throttle valve comprises a valve body, a valve element, an adjusting bolt, a compression spring, a seal ring and a limiting gasket. A valve element hole is processed in the valve body radially. The valve element is of a slide valve structure, and an oil groove, a seal ring groove and a reinjection water groove are processed in the valve element. A reinjection water channel and a gas generation channel are processed on the valve body radially. The adjusting bolt can adjust acting force of the compression spring. A through hole processed in the limiting gasket is communicated with the external annular space of the valve body and the right end of the valve element. The throttle valve simple in structure and convenient to connect is used for downhole liquid level control of a drainage gas recovery well to prevent pump burning caused by dry grinding of a reinjection pump.
Description
Technical field
The present invention relates to choke valve field, particularly relate to a kind of in down-hole gas-liquid separation and with the choke valve controlled for underground liquid level in the natural gas well of well re-injection.
Background technology
Gas well water logging is one of subject matter of restriction natural gas production, and especially in shallow layer gas gas reservoir exploitation process, the contradiction brought due to gas reservoir energy shortage is more outstanding.Adopt down-hole gas-liquid separation and reinjection technique, in down-hole, the water in natural gas can be separated, and direct reinjection into reservoir.The method that down-hole separation reinjection technique compares other water pumping gas production has the following advantages: 1. make High water cut gas well significantly reduce Liquid output and moisture content, thus can significantly reduce lifting cost and running cost; 2. save surface water disposal cost, reduce the use amount of the noxious chemicals such as anticorrisive agent, scale preventative and flocculant, reduce the pollution to environment; 3. extend the economic life of the High water cut gas well that should scrap, thus the productive life in gas field can be extended; 4. decrease the water injection well number for re-injection production water, save capital investment expense and set up ground installation development cost investment; In view of its plurality of advantages, down-hole gas-liquid separation and reinjection technique receive the concern of people gradually, and carry out equipment development and test to down-hole separation and re-injection system gradually.
In the gas well applying down-hole separation and reinjection technique, when utilizing down-hole pump (such as screw pump) to carry out re-injection, require that pump has sufficient water supply to prevent pump depletion, dry grinding occurs and causes pump to burn, so the control of the water suction liquid level of pump is vital.Nowadays the method for underground liquid level detection control mainly contains two kinds, and one is exactly acoustic sounding method, can only survey the hydrostatic level of oil well, and cannot the detection thimble gas well water logging liquid level of giving vent to anger at any time; Another kind is underground pressure sensor, owing to will place down-hole for a long time, and wants real-time Data Transmission, and downhole sensor exists life-span short and shortcoming costly.
Summary of the invention
The object of the invention is the shortcoming for prior art, provide a kind of can the detection thimble gas well water logging liquid level of giving vent to anger immediately, and structure is simple, connection is convenient, the choke valve controlled for underground liquid level of long service life.
The present invention adopts following design scheme:
A kind of choke valve controlled for underground liquid level, comprise valve body and spool, described valve body 4 is cylindrical, the middle part radial direction of valve body 4 offers the spool bore running through axle center, U-type groove is offered respectively along axle center in valve body 4 upper and lower part, upper and lower U-type groove is peripheral axially offers upper and lower through aerogenesis passage 16, and in upper and lower U-type groove, symmetry offers the backwater channel 15 through with spool bore, offers the air pressure balance duct 7 through with spool bore in lower U-type groove periphery; Described spool 13 is the sliding valve structures coordinated with spool bore slipper seal, offers oil groove 11 and reinjected water groove 10 at spool 13 external surface, and reinjected water groove 10 is formed with backwater channel 15 and coordinates; Spool 13 is limited in spool bore by Compress Spring 6 and adjusting bolt 5 in spool 13 one end, and Compress Spring 6 workspace is communicated with air pressure balance duct 7; Spool 13 is limited in spool bore by spacing shim 14 by spool 13 other end, and spacing shim 14 is processed with through hole, is communicated with in the spool bore gap of the outside annular space of valve body 4 with this spool 13 end.
Such scheme also comprises:
Also offer oil groove 11 and o-ring groove at spool 13 external surface, in o-ring groove, be provided with the sealing ring 12 be sealed and matched with spool bore.
In valve body about 4 U-type groove, grafting is sealed with interior pipe respectively.
Valve body 4 upper and lower end parts is connected to outer tube, and interior pipe and valve body 4 joint portion are provided with sealing ring.
The annular space formed between the inner and outer pipes of valve body about 4 is communicated with aerogenesis passage 16.
Advantage of the present invention is: (1) structure is simple, easy to process.(2) connection is convenient, is directly bound up on below oil pipe, does not increase the radial dimension of equipment.(3) guiding valve sliding friction is little, and Liquid level precision is high.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of a kind of choke valve for underground liquid level control of the present invention.
Fig. 2 is the valve A-A face sectional drawing of a kind of choke valve for underground liquid level control of the present invention.
Fig. 3 is the top view of a kind of choke valve for underground liquid level control of the present invention.
1. outer tube A in figure, pipe A, 3. sealing ring, 4. valve body, 5. adjusting bolt, 6. Compress Spring 2., 7. air pressure balance duct, pipe B 8., 9. outer tube B, 10. reinjected water groove, 11. oil grooves, 12. sealing rings, 13. spools, 14. spacing shims, 15. re-injection water channels, 16. aerogenesis passages.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the invention will be further described:
A kind of valve body 4 of the choke valve for underground liquid level control is cylindrical, and the radial direction of valve body 4 is processed with spool bore, and spool 13 and spool bore are sealed by sealing ring 12; Spool 13 one end is Compress Spring 6 and adjusting bolt 5, and the other end is spacing shim 14; Adjusting bolt 5 can regulate the active force of Compress Spring 6 and the left side as spool 13 is spacing; Spacing shim 14 is that the right of spool 13 is spacing; Spacing shim 14 is processed with through hole, is communicated with by the outside annular space of valve body 4 with spool 13 right-hand member; Spool 13 is sliding valve structure, and spool 13 is processed with oil groove 11, o-ring groove and reinjected water groove.
Valve body 4 top connects outer tube A1, and there is interior pipe A2 outer tube A1 inside, and interior pipe A2 is connected with valve body 4 top U-type groove; Valve body 4 bottom connects outer tube B9, and there is interior pipe B8 outer tube B9 inside, and interior pipe B8 is connected with valve body 4 bottom U-type groove; Valve body 4 is processed with aerogenesis passage 16, and aerogenesis passage 16 is axially extending bores of valve body 4; Form annular space A between outer tube A1 and interior pipe A2, form annular space B between outer tube B9 and interior pipe B8, annular space A is communicated with by aerogenesis passage 16 with annular space B; Valve body 4 is processed with backwater channel 15, backwater channel 15 be valve body 4 axially extending bore and and form communicating passage between interior pipe A2 and interior pipe B8; Valve body 4 is axially processed with air pressure balance duct 7, and spool 13 leftward space is communicated with annular space B by air pressure balance duct 7.
During concrete use, outer tube A1 top connecting downhole eliminator, downhole separator top connects re-injection pump; Outer tube B9 bottom splicing sleeve packing leather cup; Payzone gas arrives downhole separator through annular space B, aerogenesis passage 16 and annular space A, and the water that downhole separator is separated gathers downwards, accumulates in the outside annular space of casing off leather cup top and upper exterior tube A1; Through hole by spacing shim 14 on the right of spool 13 is communicated with Separation of Water, and the pressure acted on the right of spool 13 is the air pressure that Separation of Water forms water column pressure and Separation of Water top; Spool 13 left side is communicated with air pressure balance duct 7, and air pressure balance duct 7 is communicated with annular space B, and the pressure acting on spool 13 left side is the air pressure of spring pressure and annular space B; Re-injection pump sucks Separation of Water, then by Separation of Water along the downward re-injection of interior pipe A2, reinjected water successively through interior pipe A2 inner passage, the inner space of re-injection water channel 15, reinjected water groove 10 and interior pipe B8; When Separation of Water liquid level is in a high position, spool 13 right atrial pressure is greater than left pressure, spool 13 standard-sized sheet, and orifice size is maximum, and the re-injection pressure of re-injection pump is less; Along with Separation of Water liquid level declines, on the left of spool 13, spring promotes spool 13 gradually and moves right, and orifice size reduces, and the re-injection pressure of re-injection pump constantly becomes large.The change of re-injection blowback note pressure can change to judge by the pressure of gas production wellhead re-injection pump drive motors curent change or the ground pressure tap be communicated with re-injection pump leakage fluid dram, thus carries out start and stop according to electric current or the change of pressure tap pressure to backpressure pump.
Claims (5)
1. the choke valve controlled for underground liquid level, comprise valve body and spool, it is characterized in that: described valve body (4) is cylindrical, the middle part radial direction of valve body (4) offers the spool bore running through axle center, U-type groove is offered respectively along axle center in valve body (4) upper and lower part, upper and lower U-type groove is peripheral axially offers upper and lower through aerogenesis passage (16), in upper and lower U-type groove, symmetry offers the backwater channel (15) through with spool bore, offers the air pressure balance duct (7) through with spool bore in lower U-type groove periphery; Described spool (13) is the sliding valve structure coordinated with spool bore slipper seal, offer reinjected water groove (10) at spool (13) external surface, reinjected water groove (10) is formed with backwater channel (15) and coordinates; Spool (13) is limited in spool bore by Compress Spring (6) and adjusting bolt (5) in spool (13) one end, and Compress Spring (6) workspace is communicated with air pressure balance duct (7); Spool (13) is limited in spool bore by spacing shim (14) by spool (13) other end, spacing shim (14) is processed with through hole, is communicated with in the spool bore gap that the outside annular space of valve body (4) and this spool (13) are held.
2. the choke valve controlled for underground liquid level according to claim 1, is characterized in that: also offer oil groove (11) and o-ring groove at spool (13) external surface, arranges sealing ring (12) in o-ring groove.
3. the choke valve controlled for underground liquid level according to claim 1 and 2, is characterized in that: in the upper and lower U-type groove of valve body (4), grafting is sealed with interior pipe respectively.
4. the choke valve controlled for underground liquid level according to claim 3, it is characterized in that: valve body (4) upper and lower end parts is connected to outer tube, interior pipe and valve body (4) joint portion are provided with sealing ring.
5. the choke valve controlled for underground liquid level according to claim 4, is characterized in that: the annular space formed between the inner and outer pipes that valve body (4) is upper and lower is communicated with aerogenesis passage (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310743940.5A CN104747122B (en) | 2013-12-31 | 2013-12-31 | A kind of choke valve controlled for underground liquid level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310743940.5A CN104747122B (en) | 2013-12-31 | 2013-12-31 | A kind of choke valve controlled for underground liquid level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104747122A true CN104747122A (en) | 2015-07-01 |
| CN104747122B CN104747122B (en) | 2017-10-10 |
Family
ID=53587301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310743940.5A Active CN104747122B (en) | 2013-12-31 | 2013-12-31 | A kind of choke valve controlled for underground liquid level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747122B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109072679A (en) * | 2015-11-05 | 2018-12-21 | 鼎盛油田技术有限公司 | Downhole tool with the axial passageway and lateral fluid access that open/close |
| CN110552681A (en) * | 2019-08-31 | 2019-12-10 | 中国石油集团川庆钻探工程有限公司 | separator liquid level adjusting system for oil testing |
| CN116146153A (en) * | 2023-04-20 | 2023-05-23 | 天津市益彰石油科技发展有限公司 | Coaxial double-cylinder drag reduction lifting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2823545Y (en) * | 2005-07-22 | 2006-10-04 | 季会军 | Oil well sleeve gas releasing recovering device |
| RU2325508C2 (en) * | 2005-06-03 | 2008-05-27 | Республиканское унитарное предприятие "Производственное объединение "Белоруснефть" (РУП "Производственное объединение "Белоруснефть") | Circulating valve |
| CN101358515A (en) * | 2007-07-31 | 2009-02-04 | 中国石油天然气股份有限公司 | Flow divider for normal flushing well |
| CN201763296U (en) * | 2010-06-30 | 2011-03-16 | 天津津港石油机械修造有限公司 | Sleeve gas constant pressure throttling discharge device |
| CN202926284U (en) * | 2012-10-20 | 2013-05-08 | 中国石油化工股份有限公司 | Novel throttle valve |
| CN203756121U (en) * | 2013-12-31 | 2014-08-06 | 中国石油化工集团公司 | Throttling valve for controlling down-hole liquid level |
-
2013
- 2013-12-31 CN CN201310743940.5A patent/CN104747122B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2325508C2 (en) * | 2005-06-03 | 2008-05-27 | Республиканское унитарное предприятие "Производственное объединение "Белоруснефть" (РУП "Производственное объединение "Белоруснефть") | Circulating valve |
| CN2823545Y (en) * | 2005-07-22 | 2006-10-04 | 季会军 | Oil well sleeve gas releasing recovering device |
| CN101358515A (en) * | 2007-07-31 | 2009-02-04 | 中国石油天然气股份有限公司 | Flow divider for normal flushing well |
| CN201763296U (en) * | 2010-06-30 | 2011-03-16 | 天津津港石油机械修造有限公司 | Sleeve gas constant pressure throttling discharge device |
| CN202926284U (en) * | 2012-10-20 | 2013-05-08 | 中国石油化工股份有限公司 | Novel throttle valve |
| CN203756121U (en) * | 2013-12-31 | 2014-08-06 | 中国石油化工集团公司 | Throttling valve for controlling down-hole liquid level |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109072679A (en) * | 2015-11-05 | 2018-12-21 | 鼎盛油田技术有限公司 | Downhole tool with the axial passageway and lateral fluid access that open/close |
| CN110552681A (en) * | 2019-08-31 | 2019-12-10 | 中国石油集团川庆钻探工程有限公司 | separator liquid level adjusting system for oil testing |
| CN110552681B (en) * | 2019-08-31 | 2022-10-14 | 中国石油集团川庆钻探工程有限公司 | Separator liquid level adjusting system for oil testing |
| CN116146153A (en) * | 2023-04-20 | 2023-05-23 | 天津市益彰石油科技发展有限公司 | Coaxial double-cylinder drag reduction lifting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104747122B (en) | 2017-10-10 |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhu Huangang Inventor after: Miao Zhiyu Inventor after: Sun Yu Inventor after: Yu Tiejun Inventor after: Li Jiancheng Inventor after: Zhang Ying Inventor after: Li Zongqing Inventor after: Song Zhongwen Inventor after: Yu Haiye Inventor after: Xu Ping Inventor after: Zhao Xulong Inventor after: Li Jianxin Inventor before: Li Jiancheng Inventor before: Song Zhongwen Inventor before: Yu Haiye Inventor before: Xu Ping Inventor before: Zhao Xulong Inventor before: Li Jianxin Inventor before: Miao Zhiyu Inventor before: Sun Yu Inventor before: Yu Tiejun |
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