CN204941475U - A kind of sealing mechanism for underground vortex instrument - Google Patents
A kind of sealing mechanism for underground vortex instrument Download PDFInfo
- Publication number
- CN204941475U CN204941475U CN201520684452.6U CN201520684452U CN204941475U CN 204941475 U CN204941475 U CN 204941475U CN 201520684452 U CN201520684452 U CN 201520684452U CN 204941475 U CN204941475 U CN 204941475U
- Authority
- CN
- China
- Prior art keywords
- liquid phase
- expandable strip
- seal groove
- sealing mechanism
- vortex generator
- 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 - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 18
- 239000007791 liquid phase Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 10
- 229920006332 epoxy adhesive Polymers 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract description 15
- 239000003345 natural gas Substances 0.000 abstract description 10
- 239000002343 natural gas well Substances 0.000 abstract description 10
- 241000521257 Hydrops Species 0.000 abstract description 8
- 206010030113 Oedema Diseases 0.000 abstract description 8
- 238000007654 immersion Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 235000019198 oils Nutrition 0.000 description 8
- 239000012071 phase Substances 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 229920001195 polyisoprene Polymers 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000019476 oil-water mixture Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 206010027336 Menstruation delayed Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Abstract
The utility model discloses a kind of sealing mechanism for underground vortex instrument, comprise vortex generator, the surface of vortex generator is provided with helicla flute, position between helicla flute forms spiral boss, spiral boss is provided with spiral helicine seal groove, liquid phase Expandable strip is installed in seal groove, liquid phase Expandable strip is not when being soaked for a long time by oil or water, liquid phase Expandable strip is embedded in seal groove completely, make between vortex generator and the well casing of the natural gas well, to there is enough large gap, be convenient to down-hole install, after being in place, the rear volume of long-time immersion expansion that liquid phase Expandable strip is subject to oil or water at well casing increases several times, the gap of vortex generator and well casing is sealed completely, solve the assemblage gap between vortex generator and well casing inwall and working seal problem, greatly can improve the content liquid entrained by unit volume natural gas, thus improve natural gas well discharge opeing efficiency, reduce or avoid the underproduction or stop-spraying that the natural gas well causes due to hydrops.
Description
Technical field
The utility model relates to the underground vortex instrument in a kind of oil and gas exploitation industry, the underground vortex instrument sealing mechanism particularly in a kind of natural gas liquid discharging gas producing.
Background technology
Generally three phases is divided in the construction of natural gas fields.First be initial stage mining phase, now the energy on stratum is huge, can directly from ejection natural gas and seldom containing liquid parts in well casing; Next is stable mining phase, now main based on natural gas and containing a small amount of liquid parts, by physical actions such as atomizations, a small amount of liquid oozed out in stratum is discharged outside well together with natural gas in well casing, with not easily hydrops in well casing in stratum; It is finally mining phase in late period, now because the decline of gas well stratum energy and the reserves of natural gas also decline, hydrops in the hydrops in shaft bottom and well casing cannot be got rid of by the natural gas of extraction in flow production completely, progressively hydrops is formed in well casing, the liquid level of hydrops rises and well head pressure is declined, and causes the decline of gas production further until well casing is liquid filled full and cannot exploits continuously.Therefore, in the exploitation later stage of the natural gas well, liquid discharging gas producing technique extends one of gas well production life of well, the important method improving coefficient of mining.
One of technology of liquid discharging gas producing adopts underground vortex instrument, and its cardinal principle by eddy current effect, the fluidised form of the biphase gas and liquid flow in well casing is changed.Eddy current effect make gas formed in well casing inside upwards, the fluidised form of spinning, liquid formed on well casing inwall upwards, the fluidised form that rotates along tube wall, thus make gas under identical flow velocity can carry more liquid.
Because underground vortex instrument will be installed to very dark down-hole, installation site from hundreds of rice to six kms not etc., so underground vortex instrument will be rendered to the predetermined degree of depth in down-hole, is a very risky operation.From the operating principle of underground vortex instrument, the external diameter of vortex generator and the gap of well casing less eddy current generation effect is better, the non-eddy current loss amount of gas can be greatly reduced, on the other hand, the too little meeting of external diameter and well casing internal diameter gap of swirling body causes and cannot throw in and cause the failure of underground vortex instrument installation exercise.In order to solve this contradiction, way of the prior art leaves certain gap between vortex generator external diameter and well casing internal diameter, this gap is generally 2-5mm, and the existence in gap greatly have impact on the effect of eddy current generation, causes the practical application effect of underground vortex instrument to have a greatly reduced quality.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of sealing mechanism for underground vortex instrument that can solve assemblage gap between vortex generator and well casing and working seal problem.
The utility model solves the technical scheme that its technical problem adopts:
A kind of sealing mechanism for underground vortex instrument, comprise vortex generator, the surface of described vortex generator is provided with helicla flute, and the position between described helicla flute forms spiral boss, described spiral boss is provided with spiral helicine seal groove, liquid phase Expandable strip is installed in described seal groove.
The diameter 4-10mm less of the internal diameter of well casing of described spiral boss.
Described helicla flute is consistent with lead angle with the hand of spiral of seal groove.
Described seal groove is positioned at the symmetric position of described spiral boss.
The cross section of described liquid phase Expandable strip is rectangle.
Described liquid phase Expandable strip can be made up of the material of meeting oil expansion, also can be made up of the material of water-swellable, and the material that all can also be expanded by chance water or chance oil is made.
Described liquid phase Expandable strip is bonded in described seal groove by epoxy adhesive.
The beneficial effects of the utility model are: the spiral boss of vortex generator of the present utility model is provided with spiral helicine seal groove, liquid phase Expandable strip is installed in seal groove, liquid phase Expandable strip is not when being soaked for a long time by oil or water, the volume of liquid phase Expandable strip is little, be embedded in completely in seal groove, make between vortex generator and the well casing of the natural gas well, to there is enough large gap, the eddy current instrument of down-hole can be smoothly through steel wire salvaging operation and be installed to designated depth in well casing, after being in place, the long-time immersion that liquid phase Expandable strip is subject to oil or water at well casing starts progressively to expand, after expanding, volume increases several times, the gap of vortex generator and well casing is sealed completely, solve the assemblage gap between vortex generator and well casing inwall and working seal problem, greatly can improve the content liquid entrained by unit volume natural gas, thus improve natural gas well discharge opeing efficiency, reduce or avoid the underproduction or stop-spraying that the natural gas well causes due to hydrops.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural representation of the underground vortex instrument of liquid phase Expandable strip when not expanding;
The structural representation of underground vortex instrument when Fig. 2 is the expansion of liquid phase Expandable strip;
Fig. 3 is that liquid phase Expandable strip forms gap state schematic diagram when not expanding;
Fig. 4 forms sealing state schematic diagram after liquid phase Expandable strip expands.
Detailed description of the invention
Referring to figs. 1 through Fig. 4, a kind of sealing mechanism for underground vortex instrument, comprise connect successively from top to bottom do fishing 2, vortex generator 3, air deflector 5 and set 6.Described 2 effects that do fishing are by wire rope operation, realize input to fish head and whole underground vortex instrument and seizure with fishing tool.The effect of described vortex generator 3 is the fluidised forms changing downhole gas liquid two-phase, realizes tornado effect.The effect of described air deflector 5 is the positions of the tube wall be transitioned into from the center setting 6 by the mixed airflow of down-hole near well casing 1.The described effect setting 6 is used to fixing whole underground vortex instrument in the position of down-hole, and has certain axial setting force.
In order to ensure that underground vortex instrument is mounted to power in well casing, the diameter 4-10mm less of the internal diameter of well casing 1 of described spiral boss, make to form a gap between the outer wall of vortex generator and well casing, when such underground vortex instrument is thrown in down-hole with the inwall of well casing 1 without any contacting, successfully underground vortex instrument can be thrown in down-hole assigned address, ensure the success rate that underground vortex instrument is thrown in and reliability.
The surface of described vortex generator 3 is provided with helicla flute, position between described helicla flute forms spiral boss, described spiral boss is provided with spiral helicine seal groove, liquid phase Expandable strip 4 is installed in described seal groove, the effect of liquid phase Expandable strip 4 is soaked by the liquid phase (oil water mixture) long-time (48H) of down-hole to make its volume expansion, seals the gap formed between vortex generator 3 outer wall and well casing 1 inwall.
In order to improve sealing performance, described helicla flute is consistent with lead angle with the hand of spiral of seal groove, and described seal groove is positioned at the symmetric position of described spiral boss, and namely in the axial direction, seal groove is equidistant to the both sides of spiral boss.
The cross section of described seal groove can be circular arc, rectangle or other shape, the cross section of liquid phase Expandable strip 4 also can be circular arc, rectangle or other shape, in the present embodiment, rectangle is preferentially selected in the cross section of seal groove, rectangle is also preferentially selected in the cross section of liquid phase Expandable strip 4, and the cross section of liquid phase Expandable strip 4 can be identical with the cross section of seal groove, also can be slightly less than the cross section of seal groove, in order to improve safety, described liquid phase Expandable strip 4 is bonded in described seal groove by epoxy adhesive.
Liquid phase due to down-hole is oil water mixture, on the material of liquid phase Expandable strip 4, can select and meet material that oil expands as the mixing thing of natural rubber or artificial caoutchouc and oleophilic resin, also the material of water-swellable can be selected as the mixing thing of natural rubber or artificial caoutchouc and high hydroscopic resin, can also select and meet oil or meet the mixing thing etc. of the equal expanding material of water as natural rubber or artificial caoutchouc and oleophilic resin and high hydroscopic resin.
Liquid phase Expandable strip of the present utility model is not when being soaked for a long time by oil or water, the volume of liquid phase Expandable strip is little, be embedded in completely in seal groove, make between vortex generator and the well casing of the natural gas well, to there is enough large gap, the eddy current instrument of down-hole can be smoothly through steel wire salvaging operation and be installed to designated depth in well casing, after being in place, the long-time immersion that liquid phase Expandable strip is subject to oil or water at well casing starts progressively to expand, after expanding, volume increases more than 4 times, the gap of vortex generator and well casing is sealed completely, block the passage of mine gas from Clearance Flow, the gas of down-hole is made to form eddy current near 100% by vortex generator, solve the assemblage gap between vortex generator and well casing inwall and working seal problem, greatly can improve the content liquid entrained by unit volume natural gas, thus improve natural gas well discharge opeing efficiency, reduce or avoid the underproduction or stop-spraying that the natural gas well causes due to hydrops.
Claims (9)
1. the sealing mechanism for underground vortex instrument, comprise vortex generator (3), the surface of described vortex generator (3) is provided with helicla flute, position between described helicla flute forms spiral boss, it is characterized in that described spiral boss is provided with spiral helicine seal groove, liquid phase Expandable strip (4) is installed in described seal groove.
2. sealing mechanism according to claim 1, is characterized in that the diameter of described spiral boss 4-10mm less of the internal diameter of well casing (1).
3. sealing mechanism according to claim 1, is characterized in that described helicla flute is consistent with lead angle with the hand of spiral of seal groove.
4. sealing mechanism according to claim 3, is characterized in that described seal groove is positioned at the symmetric position of described spiral boss.
5. sealing mechanism according to claim 1, is characterized in that the cross section of described liquid phase Expandable strip (4) is rectangle.
6. sealing mechanism according to claim 1, is characterized in that described liquid phase Expandable strip (4) is made up of the material of meeting oil expansion.
7. sealing mechanism according to claim 1, is characterized in that described liquid phase Expandable strip (4) is made up of the material of water-swellable.
8. sealing mechanism according to claim 1, is characterized in that described liquid phase Expandable strip (4) is made by meeting water or meeting the oily material all expanded.
9. sealing mechanism according to claim 1, is characterized in that described liquid phase Expandable strip (4) is bonded in described seal groove by epoxy adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520684452.6U CN204941475U (en) | 2015-09-07 | 2015-09-07 | A kind of sealing mechanism for underground vortex instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520684452.6U CN204941475U (en) | 2015-09-07 | 2015-09-07 | A kind of sealing mechanism for underground vortex instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204941475U true CN204941475U (en) | 2016-01-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520684452.6U Expired - Fee Related CN204941475U (en) | 2015-09-07 | 2015-09-07 | A kind of sealing mechanism for underground vortex instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204941475U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134138A (en) * | 2015-09-07 | 2015-12-09 | 中山乐满石油设备有限公司 | Sealing mechanism used for down hole vortex tool |
-
2015
- 2015-09-07 CN CN201520684452.6U patent/CN204941475U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134138A (en) * | 2015-09-07 | 2015-12-09 | 中山乐满石油设备有限公司 | Sealing mechanism used for down hole vortex tool |
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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: 20160106 |