CN103993856B - A kind of level pressure underground throttle device - Google Patents
A kind of level pressure underground throttle device Download PDFInfo
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- CN103993856B CN103993856B CN201410243352.XA CN201410243352A CN103993856B CN 103993856 B CN103993856 B CN 103993856B CN 201410243352 A CN201410243352 A CN 201410243352A CN 103993856 B CN103993856 B CN 103993856B
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Abstract
The present invention relates to a kind of level pressure underground throttle device, belong to the downhole tool tapping natural gas, it mainly supports, lifts piece, cylinder, cone valve, valve seat, connector, spring bearer plate, spring, guide head by center push rod, main body, pin, fishing head, slips, baffle ring, sealing ring, upper packing element frame, upper packing element, lower rubber cylinder frame, lower rubber cylinder, slide cartridge, packing element and forms. Described center push rod is connected by pin with main body, and fishing head is connected with slips and is placed in main body outside; Upper packing element frame and upper packing element are fixed on main body middle part; Slide cartridge is contained in main body afterbody and can slides, and lower rubber cylinder frame is with being threaded in slide cartridge outside, and lower rubber cylinder frame afterbody is fixed with lower rubber cylinder, and slide cartridge tail end is hung with packing element and supports; Cone valve head socket cylinder, middle part cover has valve seat, afterbody linking springs pressing plate, cylinder is fixed with connector, and valve seat is fixed with connector. The present invention throws in and is convenient to remove reliable, can guarantee to set smoothly; When salvaging, conveniently, cartridge can reset in unfreezing.
Description
Technical field
The present invention relates to a kind of level pressure underground throttle device, belong to the downhole tool tapping natural gas.
Background technology
In gas exploitation course, for making well inner high voltage gas pressure drop to the defeated pressure of ground line, conventional way is to pacify on groundDress choke valve, carries out ground reducing pressure by regulating flow. Natural gas throttling is a decrease temperature and pressure process, and ground throttling generates hydrate,Ground installation is resulted in blockage, reduce the heat conduction of equipment, gas well is produced cannot normally carry out, and meanwhile, ground throttling is producedAlso make part ground installation in high pressure conditions, be unfavorable for safety in production and daily management. For this reason, current domestic many gas fields allPromoting the use of downhole choke gas producing technology.
Downhole Choking Technology is to rely on downhole-choke to realize Wellbore of Gas Wells reducing pressure by regulating flow, makes full use of ground temperature heating, makes after throttlingGas flow temperature returns to the front temperature of throttling substantially, in reducing pressure, can not form pit shaft hydrate, thereby avoid groundFace equipment results in blockage. Be also simultaneously ground installation in low-pressure state work, be conducive to safety in production and daily management.
Downhole choke valve arrangement analysis for on-the-spot service condition and use is at present found, because flow nipple is fixing port diametral pitchStem bar, obviously, along with down-hole pressure increases, the gas pressure after throttling increases thereupon. Due to bottom current press complicated and changeable andAfter closing well, reopening well, often there is abnormal pressure in down-hole pressure, easily causes flow controller to lose efficacy, and so just may cause wellhead equipmentDangerous, can not ensure safety in production. For this reason, need to design a kind of level pressure downhole choke device, make gas pressure after throttlingDo not change with down-hole pressure, to ensure safety in production. For a long time, there is no a kind of better flow controller, can solveThe problem running in above gas production work, has become a difficult problem in gas production work.
Summary of the invention
The object of the invention is to overcome prior art deficiency, a kind of level pressure underground throttle device is provided, can be at fluid pressure and springUnder synergy, adjust the size of valve opening, the gas pressure after throttling does not change with down-hole pressure, realizes downhole chokeLevel pressure gas production, make wellhead equipment can safety work.
Technical scheme of the present invention:
A kind of level pressure underground throttle device of the present invention, mainly by center push rod, main body, pin, fishing head, slips, baffle ring, closeSeal, upper packing element frame, upper packing element, lower rubber cylinder frame, lower rubber cylinder, slide cartridge, packing element support, lift piece, cylinder, cone valve, valveSeat, connector, spring bearer plate, spring, guide head composition. Described center push rod is connected by pin with main body, fishing head andSlips is connected and is placed in main body outside; Baffle ring is equipped with in slips outside, and upper packing element frame and upper packing element are fixed on main body middle part; Slide cartridge is contained inMain body afterbody also can slide, and lower rubber cylinder frame is with being threaded in slide cartridge outside; Lower rubber cylinder frame afterbody is fixed with lower rubber cylinder; Slide cartridgeTail end is hung with packing element and supports, and packing element supports and lifts piece and be connected by pin, lifts piece inwall and spiral shell is passed through in center push rod lower endLine connects; Cone valve head socket cylinder, middle part cover has valve seat, afterbody linking springs pressing plate, cylinder is fixed with connector, valve seatFix with connector; Spring is housed in guide head, and spring is connected with spring bearer plate; Connector and packing element support, connector and companyJoint, connector and guide head are all threaded connection respectively.
There is throttle orifice cylinder head top; Cone valve is the cylindric valve of a middle part with pyramidal structure, and pyramidal structure is upperLimit limited location groove, below with throttle orifice; Cone valve top is enclosed within cylinder, can move, and it is connected with spring bearer plate below;Valve seat have one with the supporting bellmouth of cone valve, when work, spring, spring bearer plate move together with cone valve.
The present invention reopens well after bottom current is pressed complicated and changeable and closing well, and down-hole pressure occurs also can be effective in abnormal pressure situationThrottling can be adjusted the size of valve opening under fluid pressure and spring synergy, and the gas pressure after throttling is not with down-hole pressureChange and change, realize the gas production of downhole choke level pressure, make wellhead equipment can safety work.
The advantage that the present invention has and beneficial effect: 1. in the time there is abnormal pressure in down-hole, can guarantee well head and ground installation inLow-pressure state work, and gas pressure after flow controller do not change with down-hole pressure, realizes downhole choke level pressure and adoptsGas, is applicable to gas production in deep-well or abnormal pressure well and inclined shaft; 2. input and convenient to remove reliable, available rope tool is by throttlingDevice is placed on the optional position in pit shaft oil pipe, and can guarantee to set smoothly; 3. the slip insert after the optimization angle in the design existsUnder the promotion of pressure, strong the acting on oil pipe of energy, is positioned at projected depth accurately, can not produce slip, guarantees safe lifeProduce; 4. in salvaging, unfreezing is convenient, and cartridge can reset.
Brief description of the drawings
Fig. 1 is that the first half of a kind of level pressure underground throttle device of the present invention is partly cutd open structural representation.
Fig. 2 is that the latter half of a kind of level pressure underground throttle device of the present invention is partly cutd open structural representation.
In figure: 1. center push rod, 2. main body, 3. pin, 4. fishing head, 5. slips, 6. baffle ring, 7. sealing ring,8. go up packing element frame, 9. go up packing element, 10. sealing ring, 11. lower rubber cylinder framves, 12. lower rubber cylinders, 13. sealing rings, 14. is slidingCylinder, 15. packing elements support, 16. pins, 17. lift piece, 18. cylinders, 19. cone valves, 20. valve seats, 21. connectors,22. connectors, 23. spring bearer plates, 24. springs, 25. guide heads
Detailed description of the invention:
Below in conjunction with specific embodiment and brief description of the drawings the present invention:
As shown in Figure 1 and Figure 2, a kind of level pressure underground throttle device of the present invention, mainly by center push rod 1, main body 2, pin (3,16), fishing head 4, slips 5, baffle ring 6, sealing ring (7,10,13), upper packing element frame 8, upper packing element 9, lower rubber cylinder frame 11,Lower rubber cylinder 12, slide cartridge 14, packing element support 15, lift piece 17, cylinder 18, cone valve 19, valve seat 20, connector (21,22), spring bearer plate 23, spring 24, guide head 25 form. Described center push rod 1 is connected by pin 3 with main body 2, beatsDragging for 4 is connected with slips 5 and is placed in main body 2 outsides; Baffle ring 6 is equipped with in slips 5 outsides, and upper packing element frame 8 and upper packing element 9 are fixingAt main body 2 middle parts; Slide cartridge 14 is contained in main body 2 afterbodys and can slides, and lower rubber cylinder frame 11 use are threaded in slide cartridge 14 outsides;Lower rubber cylinder frame 11 afterbodys are fixed with lower rubber cylinder 12; Slide cartridge 14 tail ends are hung with packing element and support 15, packing element support 15 with lift piece17 connect by pin 16, lift piece 17 inwalls and center push rod 1 lower end is threaded connection; Cone valve 19 head socket gasCylinder 18, middle part cover has valve seat 20, afterbody linking springs pressing plate 23, cylinder 18 use connectors 21 are fixing, and valve seat 20 use connect22 fixing; 25 li of guide heads are equipped with spring 24, and spring 24 is connected with spring bearer plate 23.
There is throttle orifice described cylinder 18 head tops; Cone valve 19 is a middle part cylindric valves with pyramidal structure, and coneThe top limited location groove of shape structure, below with throttle orifice; Cone valve 19 tops are enclosed within 18 li, cylinder, can move, below withSpring bearer plate 23 is connected; Valve seat 20 have one with the supporting bellmouth of cone valve 19, when work, spring 24, spring bearer plate 23Move together with cone valve 19.
As shown in Figure 1 and Figure 2, this level pressure underground throttle device is thrown in by steel wire operation. When level pressure underground throttle device is lowered into oilWhen pipe design attitude, by carry steel wire and make to move on flow controller center push rod 1 slips 5 relative to main body 2, the conical surface of main body 2Strut along being about to slips 5 on slips 5 inner conical surfaces, slips 5 opens engaging on tubing wall. In the time that steel wire loosens completely, suddenlyOn carry steel wire, rely on jarring force pin 3 is shaken disconnected. Center push rod 1 in up process, drive lift fast 17 up. Lift fast17 to drive packing elements to support 15 up, and packing element supports the 15 top conical surfaces and bores in lower rubber cylinder 12, by lower rubber cylinder 12 strut realize withTubing wall laminating. Slide cartridge 14 struts upper packing element 9 together with lower rubber cylinder frame 11 is up, realizes the sealing with tubing wall. Drive a wellWhen production, chock pressure difference acts in packing element and main body 2, and the upwards thrust of generation drives the cone continuation of main body 2 up,Slips 5 clamps tube inner wall, and the further distending of packing element further seals main body 2 and the annular space of oil pipe. Flow controller workWhile work, when down-hole pressure hour, the cone valve 19 of flow controller under pressure and spring 24 effects, to left movement, valve opening fromMoving increase, valve reducing pressure by regulating flow value reduces; And in the time that down-hole pressure is larger, the cone valve 19 of flow controller acts at pressure and spring 24Under, moving right, valve opening reduces automatically, and valve reducing pressure by regulating flow value increases. Thereby make gas pressure after choke valve not withDown-hole pressure changes and changes, and realizes the gas production of downhole choke level pressure.
The present invention utilizes 24 synergy of fluid pressure and spring to realize: when down-hole pressure hour, valve opening increases automatically, valveReducing pressure by regulating flow value reduces; And in the time that down-hole pressure is larger, valve opening reduces automatically, valve reducing pressure by regulating flow value increases. Thereby make throughGas pressure after choke valve does not change with down-hole pressure, realizes the gas production of downhole choke level pressure.
Claims (2)
1. a level pressure underground throttle device, mainly by center push rod (1), main body (2), pin (3,16), fishing head (4),Slips (5), baffle ring (6), sealing ring (7,10,13), upper packing element frame (8), upper packing element (9), lower rubber cylinder frame (11),Lower rubber cylinder (12), slide cartridge (14), packing element support (15), lift piece (17), cylinder (18), cone valve (19), valve seat (20),Connector (21,22), spring bearer plate (23), spring (24), guide head (25) composition, is characterized in that described centerPush rod (1) is connected by pin (3) with main body (2), and fishing head (4) is connected and is placed in outside main body (2) with slips (5)Portion; Baffle ring (6) is equipped with in slips (5) outside, and upper packing element frame (8) and upper packing element (9) are fixed on main body (2) middle part; SlidingCylinder (14) is contained in main body (2) afterbody and can slides, and lower rubber cylinder frame (11) is with being threaded in slide cartridge (14) outside; UnderPacking element frame (11) afterbody is fixed with lower rubber cylinder (12); Slide cartridge (14) tail end is hung with packing element and supports (15), and packing element supports (15)With lift piece (17) and be connected by pin (16), lift piece (17) inwall and center push rod (1) lower end is threaded connection;Cone valve (19) head socket cylinder (18), middle part cover has valve seat (20), afterbody linking springs pressing plate (23); Cylinder (18)Fixing with connector (21), valve seat (20) is fixing with connector (22); Inner spring (24), the bullet of being equipped with of guide head (25)Spring (24) is connected with spring bearer plate (23).
2. a kind of level pressure underground throttle device according to claim 1, is characterized in that, described cylinder (18) head topThere is throttle orifice; Cone valve (19) is the cylindric valve of a middle part with pyramidal structure, and the top limited location groove of pyramidal structure,Below with throttle orifice; It is inner that cone valve (19) top is enclosed within cylinder (18), can move its following and spring bearer plate (23)Be connected; Valve seat (20) have one with the supporting bellmouth of cone valve (19), when work, spring (24), spring bearer plate (23)Move together with cone valve (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410243352.XA CN103993856B (en) | 2014-06-04 | 2014-06-04 | A kind of level pressure underground throttle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410243352.XA CN103993856B (en) | 2014-06-04 | 2014-06-04 | A kind of level pressure underground throttle device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103993856A CN103993856A (en) | 2014-08-20 |
| CN103993856B true CN103993856B (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410243352.XA Expired - Fee Related CN103993856B (en) | 2014-06-04 | 2014-06-04 | A kind of level pressure underground throttle device |
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| Country | Link |
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| CN (1) | CN103993856B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996280A (en) * | 2017-05-22 | 2017-08-01 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of presetting system adjustable choke |
| CN111206899B (en) * | 2020-01-07 | 2022-02-01 | 青岛理工大学 | Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders |
| CN114687690B (en) * | 2022-03-31 | 2024-03-29 | 中海石油(中国)有限公司 | Slip setting mechanism and downhole throttler comprising same |
| CN114704223B (en) * | 2022-04-24 | 2022-11-18 | 四川大学 | Separable automatic grading pressure reduction device for high-pressure gas well |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070902A (en) * | 1990-12-05 | 1991-12-10 | Mcmurry Oil Tools, Inc. | Lateral orifice water regulator |
| CN200982180Y (en) * | 2006-11-03 | 2007-11-28 | 吐哈石油勘探开发指挥部钻采工艺研究院 | Throttling control device for down-hole oil pipe |
| CN201144674Y (en) * | 2007-07-25 | 2008-11-05 | 中国石油天然气股份有限公司 | Novel downhole choke having sealing structure |
| CN203879470U (en) * | 2014-05-22 | 2014-10-15 | 泸州聚源石油科技有限公司 | Pressure-balanced sand-proof movable underground throttle device |
-
2014
- 2014-06-04 CN CN201410243352.XA patent/CN103993856B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070902A (en) * | 1990-12-05 | 1991-12-10 | Mcmurry Oil Tools, Inc. | Lateral orifice water regulator |
| CN200982180Y (en) * | 2006-11-03 | 2007-11-28 | 吐哈石油勘探开发指挥部钻采工艺研究院 | Throttling control device for down-hole oil pipe |
| CN201144674Y (en) * | 2007-07-25 | 2008-11-05 | 中国石油天然气股份有限公司 | Novel downhole choke having sealing structure |
| CN203879470U (en) * | 2014-05-22 | 2014-10-15 | 泸州聚源石油科技有限公司 | Pressure-balanced sand-proof movable underground throttle device |
Non-Patent Citations (1)
| Title |
|---|
| "一种新型不压井作业自动卡瓦设计与分析";钟功祥，赵廷胜，彭彩珍;《钻采工艺》;20130731;第36卷(第4期);73-75 * |
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| CN103993856A (en) | 2014-08-20 |
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