CN201437717U - Underground sand-proof throttle - Google Patents
Underground sand-proof throttle Download PDFInfo
- Publication number
- CN201437717U CN201437717U CN2009201090067U CN200920109006U CN201437717U CN 201437717 U CN201437717 U CN 201437717U CN 2009201090067 U CN2009201090067 U CN 2009201090067U CN 200920109006 U CN200920109006 U CN 200920109006U CN 201437717 U CN201437717 U CN 201437717U
- Authority
- CN
- China
- Prior art keywords
- sand
- seating nipple
- assembly
- centre bore
- filter sand
- 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.)
- Expired - Lifetime
Links
- 239000004576 sand Substances 0.000 claims abstract description 129
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 210000002445 nipple Anatomy 0.000 claims description 89
- 239000013049 sediment Substances 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 18
- 238000001914 filtration Methods 0.000 abstract description 9
- 239000002343 natural gas well Substances 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000005192 partition Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000003345 natural gas Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008436 biogenesis Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910002059 quaternary alloy Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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- Lift Valve (AREA)
Abstract
An underground sand control restrictor is applied to throttling and pressure controlling of a natural gas well. Is characterized in that: the working barrel assembly mainly comprises an upper joint, an upper working barrel and a lower working barrel. The outer wall of the middle part of the lower working barrel is in threaded connection with a sand filtering assembly; the sand filtering assembly mainly comprises a sand filtering cylinder, a sand filtering pipe and a sand filtering baffle; the lower end of the lower working barrel is in threaded connection with a sand setting assembly, and the sand setting assembly mainly comprises a sand setting pipe and a bottom plug. A central hole of a sand filtering assembly mounting seat is communicated with a through hole of a lower working barrel partition plate, and a blocking throttling assembly is fixed on the mounting seat; the blocking and throttling assembly mainly comprises a fishing rod, a spring, a torsion spring, a cam shaft, a cam, a sealing ring, an air leakage short section, an air tap and an air tap pressing cap. The effect is as follows: the problem of the upper portion sand setting of gas well throttle air cock bailing head is solved, it is main to increase substantially to throw and drag for the success rate, extension downhole choke ware life.
Description
Technical field
The utility model relates to gas field development technique field, in the particularly a kind of natural gas well production high-pressure natural gas is carried out the presetting system sand control restriction choke of throttling pressure control.
Background technology
The downhole choke technology is the new technology of preparing promoted of gas field at home and abroad in recent years, promptly rely on the downhole choke valve to realize pit shaft throttling step-down, make full use of the ground temperature heating, make gas flow temperature after the throttling return to temperature before the throttling substantially, thereby the prevention air-flow form hydrate in pit shaft, reach to reduce the methyl alcohol injection rate, improve the gas well fluid-carrying capability, realize energy-saving and cost-reducing and stable gas well production capacity, simplify ground flow, reduce the purpose of cost of investment.
During the natural gas well was produced, throttling was a step-down temperature-fall period to natural gas, and conventional ground throttling technology is before throttling natural gas to be heated, and stopped up in order to avoid form hydrate.Downhole choke is to rely on underground throttle device to realize pit shaft throttling step-down, to make full use of the ground temperature heating, gas flow temperature can be risen to be higher than hydrate-formation temperature, can not form the hydrate obstruction in pit shaft and surface line.At present, restriction choke divides presetting system and rear-mounted two kinds according to use principle.
In use mainly there is following problem in rear-mounted restriction choke: 1. the cartridge deflection is big, use single, seal failure in a short time, can not reach the purpose of throttling, 2. owing to the needs of sealing, often the external diameter design is bigger for rear-mounted restriction choke, after the crystallization of formation salt the restriction choke body often takes place also in the gas production tubing string and is blocked, cause the pulling steel wire to be broken, instrument drops to the down-hole accident in shaft bottom; 3. spring easily ruptures midway, thereby causes operational failure in the medium-term and long-term work of downhole corrosion environment; When 4. changing flow nipple, also to change slips, packing element etc., use cost height simultaneously.
The presetting system restriction choke uses the problem that also has following several respects in the gas well that shakes out: 1. because the gas well stratum easily shakes out, easily formation salt crystallization and incrustation scale in the water outlet, oil pipe, conventional presetting system restriction choke lacks structures such as sand control, in use during the pulling valve, valve often takes place to be buried by sand, make pulling and running tool can't arrive throttling assembly pulling position smoothly, cause the pulling success rate very low; 2. sand output well valve serious wear, valve is stung badly in a short time, can't reach the purpose of effective throttling; 3. down-hole string well damage.
The utility model content
The purpose of this utility model is: a kind of down-hole sand control restriction choke is provided, at domestic Quaternary system biogenesis loose sand gas reservoir, formation cementation is loose, the loose powder packsand gas reservoir of the high shale in gas field easily shakes out, water outlet, down-hole valve serious wear, the pulling success rate is low, the throttling instrument can't reach safely, efficiently develop gas well in the past, it is good to develop a kind of sand controlling result, the underground throttle device that the pulling success rate is high, the problem that solves that downhole choke instrument valve drags for that head is often buried by sand and can't pulling improves the pulling success rate.Overcome in the gas well throttling pressure control process shortcoming of sand control capability deficiency.
The technical solution adopted in the utility model is: down-hole sand control restriction choke, mainly form by seating nipple assembly, obstruction throttling assembly, filter sand assembly and sand setting assembly four major parts, and it is characterized in that:
The seating nipple assembly mainly is made up of top connection, last seating nipple, following seating nipple, and the top connection lower end is threaded and goes up seating nipple, and last seating nipple is a cylindrical tube.Last seating nipple lower end is threaded down on the seating nipple.The middle part outer wall of following seating nipple has screw thread, and following seating nipple middle part outer wall thread is connected with the filter sand assembly.
The filter sand assembly mainly is made up of filter sand tube, sand screen, filter sand baffle plate.The filter sand tube is cylindric, and filter sand tube upper end is connected down on the outer wall thread of seating nipple middle part.Sand screen is threaded in the lower end of filter sand tube.The annular filter sand baffle plate that the band through hole is arranged in the sand screen bottom.
The following seating nipple lower end sand setting assembly that is threaded, sand setting assembly are mainly by sand sediment pipe, the stifled composition of the end.Sand sediment pipe upper end is threaded with following seating nipple lower end, and sand sediment pipe is in sand screen and pass annular filter sandpipe its centre hole bottom the sand screen.It is stifled at the bottom of the bottom of sand sediment pipe is fixed with one.
Following seating nipple lower outer diameter forms annular space less than filter sand tube internal diameter between following seating nipple and the filter sand tube inwall.In following seating nipple inside dividing plate is arranged, dividing plate will descend seating nipple to be divided into epicoele and cavity of resorption.In the seating nipple dividing plate cross through hole is being arranged down.The filter sand assembly mount pad that projection is arranged on the top of following seating nipple dividing plate.Filter sand assembly mount pad has centre bore, filter sand assembly mount pad centre bore and following seating nipple bulkhead through-hole UNICOM.On mount pad, be fixed with and stop up the throttling assembly.
Stopping up the throttling assembly mainly is made up of disappointing pipe nipple, valve, valve pressure cap.Disappointing short circuit lower end is fixed in the filter sand assembly mount pad centre bore.Disappointing short circuit upper end is fixed in the cylindrical mount pad hole at seating nipple center.A valve is arranged at the bottom of disappointing short circuit, and valve is fixing by the valve pressure cap.The valve pressure cap is cylindrical, and the valve pressure cap has centre bore, and outer wall has screw thread, and the valve pressure cap is fixed in the filter sand assembly mount pad centre bore by external screw thread and compresses valve.Centre bore and valve centre bore UNICOM are arranged at disappointing short circuit bottom.There is transverse holes at disappointing short circuit middle part, the short circuit transverse holes of losing heart and centre bore UNICOM.
Stop up the throttling assembly for the ease of salvaging, on the cylindrical mount pad top at last seating nipple center centre bore is arranged, cylindrical mount pad top has camshaft and cam is arranged in the centre bore, and cam is stuck in the draw-in groove of seating nipple.Torsionspring is arranged on camshaft.Top at the short circuit that loses heart is fixed with the spring pressure cap.The spring pressure cap has centre bore, and passing spring pressure cap centre bore has a fishing rod.In the annular space between fishing rod and spring pressure cap spiral compression spring is arranged.The lower end of spring is against on the ring-shaped step of fishing rod bottom.
In order to improve sealing performance, last seating nipple has O type circle with the junction of following seating nipple; There is sealing ring the junction of stopping up throttling assembly and following seating nipple; There is the O RunddichtringO junction of following seating nipple and filter sand tube.
Top connection, fishing rod, sand screen and the end are stifled to be the parts that those skilled in the art know, use always, no longer describes in detail.
During use, with oil pipe that the seating nipple assembly is following after the predetermined down well placement of design, to stop up under the throttling assembly up and down in the seating nipple with the wire Launching and Bailing car, the cam draw-in groove is arranged in last seating nipple, cam is stuck in the stopper slot when carrying on the steel wire, to stop up the throttling assembly and throw in seating nipple up and down, finish the input work of throttling valve.During opening well and making production, natural gas enters sand screen the artificial bottom of a well is sunk in the most of fine silt filtration in the natural gas, natural gas after the filtration enters the valve throttling, because the natural gas after filtering is with the ultra-fine flour sand of part, this part ultra-fine flour sand overwhelming majority follows natural gas to take ground to, all the other small parts sink to tail pipe, avoided fishing rod often by sand bury cause can't the pulling situation generation, simultaneously owing to adopted the filter sand assembly to reduce the wearing and tearing of valve, solved restriction choke valve short problem in application life, because it is little to stop up throttling assembly external diameter, be easy in oil pipe, pull out, adjusting the valve size easily according to the gas production designing requirement at the scene, is the ideal tools that gas field sand output well downhole choke is promoted the use of.
The beneficial effects of the utility model: the utility model down-hole sand control restriction choke, solve gas well throttling valve and dragged for a problem of top sand setting, it is main increasing substantially the pulling success rate, prolongs underground throttle device application life.
Description of drawings
Fig. 1 is the utility model down-hole sand control restriction choke the first half structural profile schematic diagram.
Fig. 2 is the utility model down-hole sand control restriction choke the latter half structural profile schematic diagram.
Fig. 3 is the A-A generalized section of Fig. 1.
Among the figure, 1. top connection, 2. fishing rod, 3. overcoat, 4. spring, 5. torsionspring, 6. camshaft, 7. cam, 8. the short circuit that loses heart, 9. sealing ring, 10.O type circle, seating nipple on 11., 12.O RunddichtringO, 13. times seating nipples, 14. valves, 15. the valve pressure cap, 16. filter sand tubes, 17. sand sediment pipes, 18. sand screen, 19. sand screen baffle plates, 20. ends, are stifled.
The specific embodiment
Embodiment 1: with a down-hole sand control restriction choke is example, and the utility model is described in further detail.
The utility model down-hole sand control restriction choke mainly is made up of seating nipple assembly, obstruction throttling assembly, filter sand assembly and sand setting assembly four major parts.
Consult Fig. 1.The seating nipple assembly mainly is made up of top connection 1, last seating nipple 11, following seating nipple 13, and top connection 1 lower end external screw thread connects one and goes up seating nipple 11, and last seating nipple 11 is a cylindrical tube.Following seating nipple 13 upper ends that are threaded, last seating nipple 11 lower ends, last seating nipple 11 has twice O type circle 10 with the junction of following seating nipple 13.The middle part outer wall of following seating nipple 13 has screw thread, and following seating nipple 13 middle part outer wall threads are connected with the filter sand assembly.
The filter sand assembly mainly is made up of filter sand tube 16, sand screen 17, filter sand baffle plate 19.Filter sand tube 16 is cylindric, and filter sand tube 16 upper ends are connected down on the seating nipple 13 middle part outer wall threads, and following seating nipple 13 has two O RunddichtringOs 12 with the junction of filter sand tube 16.Sand screen 17 is threaded in the lower end of filter sand tube 16.Be welded with the annular filter sand baffle plate 19 that a band centre bore and centre bore are evenly equipped with 6 through holes on every side in sand screen 17 bottoms.
The following seating nipple 13 lower ends sand setting assembly that is threaded, sand setting assembly mainly are made up of sand sediment pipe 17, the end stifled 20.Sand sediment pipe 17 upper ends are threaded with following seating nipple 13 lower ends, and sand sediment pipe 17 is in sand screen 17 and pass the centre bore of the annular filter sandpipe baffle plate 19 of sand screen 17 bottoms.Stifled 20 (consulting Fig. 2) at the bottom of the bottom of sand sediment pipe 17 is fixed with one.
Following seating nipple 13 lower outer diameter form an annular space less than filter sand tube 16 internal diameters between following seating nipple 13 and filter sand tube 16 inwalls.In following seating nipple 13 inside dividing plate is arranged, dividing plate will descend seating nipple 13 to be divided into epicoele and cavity of resorption.In seating nipple 13 dividing plates cross through hole is being arranged down.The column type filter sand assembly mount pad that projection is arranged on the top of following seating nipple 13 dividing plates.Filter sand assembly mount pad has centre bore, filter sand assembly mount pad centre bore and following seating nipple 13 bulkhead through-hole UNICOMs (consulting Fig. 3).On mount pad, be fixed with and stop up the throttling assembly.
Stopping up the throttling assembly mainly is made up of a disappointing pipe nipple 8, a valve 14 and a valve pressure cap 15.Disappointing short circuit 8 lower ends are fixed in the filter sand assembly mount pad centre bore, and short circuit 8 upper ends of losing heart are fixed in the cylindrical mount pad hole at seating nipple 11 centers.A valve 14 is arranged at the bottom of disappointing short circuit 8, and valve 14 is fixing by valve pressure cap 15.Valve pressure cap 15 is cylindrical, and valve pressure cap 15 has centre bore, and outer wall has screw thread, and valve pressure cap 15 is fixed in the filter sand assembly mount pad centre bore by external screw thread and compresses valve 14.Centre bore and valve 14 centre bore UNICOMs are arranged at disappointing short circuit 8 bottoms.There is transverse holes at disappointing short circuit 8 middle parts, short circuit 8 transverse holes of losing heart and centre bore UNICOM.There is sealing ring 9 junction of stopping up throttling assembly and following seating nipple 13.Centre bore is arranged at the cylindrical mount pad top at last seating nipple 11 centers, and cylindrical mount pad top has camshaft 6 and cam 7 in the centre bore, and cam 7 is stuck in the draw-in groove of seating nipple 11.Torsionspring 5 is arranged on camshaft 6.Top at the short circuit 8 that loses heart is fixed with spring pressure cap 3.Spring pressure cap 3 has centre bore, and passing spring pressure cap 3 centre bores has a fishing rod 2.In the annular space between fishing rod 2 and spring pressure cap 3 spiral compression spring 4 is arranged.The lower end of spring 4 is against on the ring-shaped step of fishing rod 2 bottoms.
Claims (3)
1. a down-hole sand control restriction choke mainly is made up of seating nipple assembly, obstruction throttling assembly, filter sand assembly and sand setting assembly four parts, it is characterized in that:
The seating nipple assembly mainly is made up of top connection (1), last seating nipple (11) and following seating nipple (13), top connection (1) lower end is threaded and goes up seating nipple (11), last seating nipple (11) is a cylindrical tube, last seating nipple (11) lower end is threaded down on the seating nipple (13), the middle part outer wall of following seating nipple (13) has screw thread, and following seating nipple (13) middle part outer wall thread is connected with the filter sand assembly;
The filter sand assembly mainly is made up of filter sand tube (16), sand screen (17) and filter sand baffle plate (19), filter sand tube (16) is cylindric, filter sand tube (16) upper end is connected down on the outer wall thread of seating nipple (13) middle part, the sand screen (17) that is threaded in the lower end of filter sand tube (16) has the annular filter sand baffle plate (19) of band through hole in sand screen (17) bottom;
Following seating nipple (13) the lower end sand setting assembly that is threaded, the sand setting assembly mainly is made up of sand sediment pipe (17) and the end stifled (20), sand sediment pipe (17) upper end is threaded with following seating nipple (13) lower end, sand sediment pipe (17) is in sand screen (17) and pass the centre bore of the annular filter sandpipe baffle plate (19) of sand screen (17) bottom, at the bottom of the bottom of sand sediment pipe (17) is fixed with one stifled (20);
Following seating nipple (13) lower outer diameter is less than filter sand tube (16) internal diameter, form annular space between following seating nipple (13) and filter sand tube (16) inwall, in following seating nipple (13) inside dividing plate is arranged, dividing plate will descend seating nipple (13) to be divided into epicoele and cavity of resorption, in seating nipple (13) dividing plate cross through hole is being arranged down, the filter sand assembly mount pad that projection is arranged on the top of following seating nipple (13) dividing plate, filter sand assembly mount pad has centre bore, filter sand assembly mount pad centre bore and following seating nipple (13) bulkhead through-hole UNICOM are fixed with on mount pad and stop up the throttling assembly;
Stop up the throttling assembly mainly by disappointing pipe nipple (8), valve (14) and valve pressure cap (15) are formed, disappointing short circuit (8) lower end is fixed in the filter sand assembly mount pad centre bore, disappointing short circuit (8) upper end is fixed in the cylindrical mount pad hole at seating nipple (11) center, a valve (14) is arranged at the bottom of disappointing short circuit (8), valve (14) is fixing by valve pressure cap (15), valve pressure cap (15) is cylindrical, valve pressure cap (15) has centre bore, outer wall has screw thread, valve pressure cap (15) is fixed in the filter sand assembly mount pad centre bore by external screw thread and compresses valve (14), centre bore and valve (14) centre bore UNICOM are arranged at disappointing short circuit (8) bottom, there is transverse holes at disappointing short circuit (8) middle part, short circuit (8) transverse holes of losing heart and centre bore UNICOM.
2. down-hole according to claim 1 sand control restriction choke, it is characterized in that: centre bore is arranged at the cylindrical mount pad top at last seating nipple (11) center, cylindrical mount pad top has camshaft (6) and cam (7) is arranged in the centre bore, cam (7) is stuck in the draw-in groove of seating nipple (11), torsionspring (5) is arranged on camshaft (6), top at the short circuit (8) that loses heart is fixed with spring pressure cap (3), spring pressure cap (3) has centre bore, pass spring pressure cap (3) centre bore a fishing rod (2) is arranged, in the annular space between fishing rod (2) and spring pressure cap (3) spiral compression spring (4) is arranged, the lower end of spring (4) is against on the ring-shaped step of fishing rod (2) bottom.
3. down-hole according to claim 1 and 2 sand control restriction choke is characterized in that: there is O type circle (10) junction of going up seating nipple (11) and following seating nipple (13); There is sealing ring (9) junction of stopping up throttling assembly and following seating nipple (13); Following seating nipple (13) has O RunddichtringO (12) with the junction of filter sand tube (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201090067U CN201437717U (en) | 2009-06-26 | 2009-06-26 | Underground sand-proof throttle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201090067U CN201437717U (en) | 2009-06-26 | 2009-06-26 | Underground sand-proof throttle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201437717U true CN201437717U (en) | 2010-04-14 |
Family
ID=42399693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201090067U Expired - Lifetime CN201437717U (en) | 2009-06-26 | 2009-06-26 | Underground sand-proof throttle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201437717U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949281A (en) * | 2010-09-21 | 2011-01-19 | 中国石油天然气股份有限公司 | Underground throttle |
| CN101967966A (en) * | 2010-09-21 | 2011-02-09 | 中国石油天然气股份有限公司 | Sand-burying-proof throwing-dragging single rubber barrel downhole choke |
| CN105443087A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Underground throttle |
| CN112343564A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Gas well underground throttler air faucet automatic falling mechanism and use method |
-
2009
- 2009-06-26 CN CN2009201090067U patent/CN201437717U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949281A (en) * | 2010-09-21 | 2011-01-19 | 中国石油天然气股份有限公司 | Underground throttle |
| CN101967966A (en) * | 2010-09-21 | 2011-02-09 | 中国石油天然气股份有限公司 | Sand-burying-proof throwing-dragging single rubber barrel downhole choke |
| CN101967966B (en) * | 2010-09-21 | 2013-02-13 | 中国石油天然气股份有限公司 | Sand-burying-proof throwing-dragging single rubber barrel downhole choke |
| CN101949281B (en) * | 2010-09-21 | 2013-03-27 | 中国石油天然气股份有限公司 | Underground throttle |
| CN105443087A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Underground throttle |
| CN105443087B (en) * | 2014-08-29 | 2018-06-01 | 中国石油天然气股份有限公司 | Underground throttle |
| CN112343564A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Gas well underground throttler air faucet automatic falling mechanism and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100414 |