CN201144674Y - Novel seal structure downhole choke ware - Google Patents
Novel seal structure downhole choke ware Download PDFInfo
- Publication number
- CN201144674Y CN201144674Y CNU2007201698764U CN200720169876U CN201144674Y CN 201144674 Y CN201144674 Y CN 201144674Y CN U2007201698764 U CNU2007201698764 U CN U2007201698764U CN 200720169876 U CN200720169876 U CN 200720169876U CN 201144674 Y CN201144674 Y CN 201144674Y
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- main body
- slips
- packing element
- movable sleeve
- overcoat
- 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
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- 238000007789 sealing Methods 0.000 claims abstract description 56
- 238000012856 packing Methods 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000002343 natural gas well Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 241000283216 Phocidae Species 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model provides a novel seal structure throttle in pit of throttle depressurization in natural gas well production process, including salvaging neck (3), main part (4), center tube (5), slips (7), go up packing element (8), packing element (9) etc. down, it is connected with packing element (9) down to go up packing element (8), slips (7) cup joint on main part (4), movable sleeve (10) are connected with main part (4), overcoat (11) are connected with movable sleeve (10), endotheca (13) are connected with main part (4), air cock (15) are connected with center tube (5), adjusting screw (19) are equipped with adjusting coat (18) outward, sealing performance is reliable, long service life, can satisfy the long-term stable production's of gas well needs, and open the well after shut-in can guarantee same effective sealing.
Description
Technical field
The utility model is the downhole tool of throttling step-down in a kind of natural gas well manufacturing process, specifically, is a kind of novel sealing structure underground throttle device.
Background technology
Downhole choke technology is to rely on the downhole choke mouth to realize gas well pit shaft throttling step-down, makes full use of the ground temperature heating, makes after the throttling gas flow temperature can return to temperature before the throttling substantially, when reducing pressure, can not form hydrate in pit shaft.
Domestic and international many oil gas fields were all once carried out the experimental study of downhole choke in conjunction with the characteristics of this oil gas field, for efficient, the economic development of oil gas field contributes.As at the isolated island of Gas field, Shengli Oil Field with cultivate western oil gas field etc., confirm that by application test downhole choke can prevent that freezing of well head pipeline in winter is stifled, reduce construction investment, accelerate gas well engineering construction speed, make things convenient for production management, guarantee that gas well produces winter continuously.
Look into of the retrieval of new center according to the Scientific and Technical Information Institute, Shaanxi Province, filter out 14 pieces of pertinent literatures the domestic scientific and technical literature of collection, data of optical disk storehouse and domestic on-line deta base.By analysis, have 6 pieces to be the relevant document of the utility model research and application, the characteristics of 8 pieces of documents are as follows in addition:
1, the good two gas reservoir high pressure downhole choke technology field trial effects in Mo Xi gas field are followed the tracks of in the river
At be the super-pressure gas reservoir, what carry out is the research of high pressure downhole choke process application, restriction choke is fixed, is made up of seating nipple and restriction choke.
2, the application of downhole choke technology in two lump gas field developments
The described restriction choke of the document only is applicable to a kind of oil pipe, uses single.
3, the application of downhole choke technology in gas field development
The described restriction choke of the document has fixed and movable two kinds, and wherein movable is applicable to a kind of oil pipe.
4, the downhole choke technology is in the application of Ma Zhuan gas field
The document can prevent gas well hydrate blockage problem after just having described the application underground throttle device effectively.
5, the movable underground throttle device of gas well
The sealing means of restriction choke described in the document is end face seal, only is applicable to a kind of oil pipe.
6, gas well underground throttle device technology
The valve sealing means of restriction choke described in the document is the sealing mat end face seal, only is applicable to a kind of oil pipe.
7, novel gas well underground throttle device
The described restriction choke structure of this patent is made up of various mechanism with to look into new projects different, and flow nipple is installed in fishing head inside, and a whole set of structure adopts the sealing of self sealss mechanism.
8, underground throttle device
This patent is the described restriction choke of document [6], and the valve sealing means is the sealing mat end face seal, only is applicable to a kind of oil pipe.
According to looking into new result, simultaneously domestic downhole choke technology applicable cases is investigated, in the prior art, except that the fixation type throttle device, all the other restriction chokes and the utility model be basically identical on general structure and technological principle: mainly be made up of fishing head, slips, main body, cartridge and flow nipple etc.; Utilize piano wire G.I.H design attitude, the seat slips of being honored as a queen struts seat in oil pipe, and cartridge is strutted realizes sealing, and air communication is crossed the valve output, relies on valve size control output and pressure.
Mainly there is following weak point in prior art: the first, and main body and central tube, valve and center-pole sealing means are end face seal, and sealing ring is in " freedom " state in the process of going into the well, and easily causes sealing ring damage or poorly sealed; The second, cartridge adopts rubber and steel part to sulfide, and often stress is concentrated fragile in the work; The 3rd, drive a well again after the problem, particularly closing well that underground throttle device ubiquity bearing capacity is poor in the prolonged application process, period of validity is short and cause the restriction choke actual effect easily.
Summary of the invention
The purpose of this utility model provides a kind of novel sealing structure underground throttle device, and its sealing performance is reliable, and long working life can satisfy the gas well needs of producing steady in a long-term, and drives a well behind the closing well and can guarantee the same effectively sealing of restriction choke.
The utility model is achieved in that and comprises the input head, pin, fishing neck, main body, central tube, snap ring, slips, last packing element, lower rubber cylinder, movable sleeve, overcoat, sealing ring, interior cover, sealing ring, valve, the compression spring, adjusting nut, regulate overcoat, adjusting screw(rod), sealing cap, the outside socket main body of central tube, the outer cover of main body is connected to fishing neck, pin is housed on the main body, last packing element is connected with lower rubber cylinder, slip sleeve is connected on the main body, movable sleeve is connected with main body, overcoat is connected with movable sleeve, interior cover is connected with main body, valve is connected with central tube, and adjusting screw(rod) is equipped with the adjusting overcoat outward, and adjusting nut is connected with adjusting screw(rod).
Main body is connected by pin with the input head.
Main body is provided with the conical surface.
Slips is provided with the conical surface.
Slips is provided with snap ring.
Be provided with sealing ring between the movable sleeve main body, be provided with sealing ring between central tube and the main body endoporus.
Advantage of the present utility model is: its sealing performance is reliable, and long working life can satisfy the gas well needs of producing steady in a long-term, and drives a well behind the closing well and can guarantee the same effectively sealing of restriction choke.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
As shown in drawings, comprise and throw in 1, pin 2, fishing neck 3, main body 4, central tube 5, snap ring 6, slips 7, last packing element 8, lower rubber cylinder 9, movable sleeve 10, overcoat 11, sealing ring 12, interior cover 13, sealing ring 14, valve 15, compression spring 16, adjusting nut 17, regulate overcoat 18, adjusting screw(rod) 19, sealing cap 20, the outside socket main body 4 of central tube 5, the outer cover of main body 4 is connected to fishing neck 3, pin 2 is housed on the main body 4, last packing element 8 is connected with lower rubber cylinder 9, slips 7 is socketed on the main body 4, movable sleeve 10 is connected with main body 4, overcoat 11 is connected with movable sleeve 10, in cover 13 be connected with main body 4, valve 15 is connected with central tube 5, adjusting screw(rod) 19 outer being equipped with are regulated overcoat 18, and adjusting nut 17 is connected with adjusting screw(rod) 19.Main body 4 with throw in 1 and be connected by pin 2.Main body 4 is provided with the conical surface.Slips 7 is provided with the conical surface.Slips 7 is provided with snap ring 6.Be provided with sealing ring 12 between movable sleeve 10 main bodys 4, be provided with sealing ring 14 between central tube 5 and main body 4 endoporus.
Throw in 1 and be used for finishing equipment and throw in the gas well pit shaft, pin 2 guarantees to make restriction choke keep packing element 8 and lower rubber cylinder 9 to be in contraction state in the process of going into the well by central tube 5 compression springs 16.Fishing neck 3, snap ring 6 and slips 7 actings in conjunction make the restriction choke fastening on oil pipe, slide on the conical surface of main body 4, and slips 7 conical surfaces and main body 4 cone match impel slips 7 to fix on the oil pipe.Movable sleeve 10 can make throttling when the process of salvaging, drives and makes upper and lower packing element be in contraction state by adjusting screw(rod) 19, adjusting nut 17, adjusting overcoat 18, overcoat 11, is convenient to restriction choke and salvages.In cover 13 is connected with main body by screw thread, thereby the force direction of spring 16 is compressed in change.Use twice " O " RunddichtringO in the design, the sealing that sealing ring 12 is realized between movable sleeve 10 and the main body 4, the sealing that sealing ring 14 is realized between central tube 5 and main body 4 endoporus.On central tube 5, and sealing cap 20 is used for regulating the restriction choke packing element and struts degree by the direct rivet of tight fit for valve 15; Rely on pin 2 to make compression spring 16 be in compressive state, jarring shear pin nail 2 discharges compression springs 16 behind following people's pit shaft design attitude, rely on compression spring 16 power to make a packing element support big sealed tube wall, utilize gas pressure to promote another packing element during opening well and making production and finish sealing.
The utility model changes main body 4 and central tube 5 sealings into radial seal by end face seal, and valve and center-pole sealing means change the nonrubber sealing into by the end face rubber seal, have improved the underground throttle device functional reliability.
The utility model has been developed novel " split type " packing element, new packing element can guarantee effective sealing.
The utility model restriction choke can keep excellent sealing performance under high temperature, big pressure reduction environment, can satisfy long celebrating gas field gas well application conditions substantially.
The utility model need of work was finished by three steps: 1, throw in; 2, seat envelope; 3, sealing.
1, launch process
As shown in drawings, the utility model is thrown in by steel wire operation, transfer in the process by throwing in 1 a promotion central tube 5, thereby compression is positioned at the spring on the adjusting screw(rod) 19, make spring be in contraction state, thereby packing element 8 and lower rubber cylinder 9 are in retracted mode on having guaranteed in the process of going into the well, and make its maximum outside diameter less than pipe aperture 3～5mm.Throwing in 1 a dependence pin 2 links together with main body 4.In descending process, slips 7 is near tube inner wall, is hampered a little then that slips 7 moves upward, and slips 7 withdrawals can be passed through smoothly.And if on carry and throw in 1, main body 4 because of with throw in 1 and link together by pin 2, move so make progress.Main body 4 conical surfaces will strut slips 7 this moment, make slips 7 fastenings on oil pipe, so this instrument in launch process, is forbidden to carry.
2, seat envelope process
As shown in drawings, when restriction choke is lowered into the oil pipe design attitude, by on carry steel wire and make on the restriction choke main body 4 relative slips 7 and move, slips 7 opens fastening on tubing wall.Slowly the below steel wire illustrates that when showing pulling force less than static pulling force restriction choke fastening is on oil pipe.To guarantee in this process that steel wire transfers slowly, especially, prevent down that the power of hitting is with restriction choke shake pine in that close must be steady when closing bumper jar.When steel wire loosens fully, carry steel wire on suddenly, rely on jarring force that pin 2 shakes are disconnected, to carry steel wire on directly will throw in 1 a proposition pit shaft, input work is finished.
3, seal process
As shown in drawings, restriction choke is effectively realized sealing, throttling action need go up packing element 8, lower rubber cylinder 9 is finished and tube inner wall between sealing.When pin 2 was cut off, slips 7 fastenings this moment were on tubing wall, and main body 4 keeps motionless, and interior cover 13 is threaded with main body 4 also will keep motionless.Spring promoted adjusting screw(rod) 19 and moved upward this moment, drove sealing cap 20, regulated overcoat 18, overcoat 11 together moves upward, and this moment, the overcoat 11 upper end conical surfaces were bored in the lower rubber cylinder 9, lower rubber cylinder 9 were strutted the first sealing that has realized restriction choke.And when opening well and making production, because lower rubber cylinder 9 sealing oil pipes, packing element 8 struts in the promotion that will move up under differential pressure action, thereby finishes secondary seal.The back air communication that drives a well is crossed the valve output, relies on valve size control output and pressure.
Claims (6)
1. novel sealing structure underground throttle device, comprise and throw in head (1), pin (2), fishing neck (3), main body (4), central tube (5), snap ring (6), slips (7), last packing element (8), lower rubber cylinder (9), movable sleeve (10), overcoat (11), sealing ring (12), interior cover (13), sealing ring (14), valve (15), compression spring (16), adjusting nut (17), regulate overcoat (18), adjusting screw(rod) (19), it is characterized in that: the outside socket main body (4) of central tube (5), the outer cover of main body (4) is connected to fishing neck (3), pin (2) is housed on the main body (4), last packing element (8) is connected with lower rubber cylinder (9), slips (7) is socketed on the main body (4), movable sleeve (10) is connected with main body (4), overcoat (11) is connected with movable sleeve (10), interior cover (13) is connected with main body (4), valve (15) is connected with central tube (5), outer being equipped with of adjusting screw(rod) (19) regulated overcoat (18), and adjusting nut (17) is connected with adjusting screw(rod) (19).
2. a kind of novel sealing structure underground throttle device according to claim 1 is characterized in that: main body (4) is connected by pin (2) with input head (1).
3. a kind of novel sealing structure underground throttle device according to claim 1 is characterized in that: main body (4) is provided with the conical surface.
4. a kind of novel sealing structure underground throttle device according to claim 1 is characterized in that: slips (7) is provided with the conical surface.
5. a kind of novel sealing structure underground throttle device according to claim 1 is characterized in that: slips (7) is provided with snap ring (6).
6. a kind of novel sealing structure underground throttle device according to claim 1 is characterized in that: be provided with sealing ring (12) between movable sleeve (10) and the main body (4), be provided with sealing ring (14) between central tube (5) and main body (4) endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201698764U CN201144674Y (en) | 2007-07-25 | 2007-07-25 | Novel seal structure downhole choke ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201698764U CN201144674Y (en) | 2007-07-25 | 2007-07-25 | Novel seal structure downhole choke ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201144674Y true CN201144674Y (en) | 2008-11-05 |
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ID=40081550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201698764U Expired - Lifetime CN201144674Y (en) | 2007-07-25 | 2007-07-25 | Novel seal structure downhole choke ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201144674Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798913A (en) * | 2010-03-10 | 2010-08-11 | 中国石油天然气股份有限公司 | Differential pressure type downhole choke |
| CN101892823A (en) * | 2010-02-25 | 2010-11-24 | 中国石油天然气股份有限公司 | Method for throwing and fishing downhole choke without steel wire in natural gas well |
| 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 |
| CN103867167A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN103993856A (en) * | 2014-06-04 | 2014-08-20 | 西南石油大学 | Constant-pressure downhole throttle device |
| CN105370252A (en) * | 2014-08-25 | 2016-03-02 | 中国石油天然气股份有限公司 | Condensate gas well exploitation method and equipment |
| CN106869873A (en) * | 2017-03-16 | 2017-06-20 | 濮阳市长盛石油技术有限公司 | Underground throttle device and application process |
| 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 |
| CN111206899A (en) * | 2020-01-07 | 2020-05-29 | 青岛理工大学 | Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders |
| CN112302583A (en) * | 2019-07-29 | 2021-02-02 | 中国石油化工股份有限公司 | Restrictor and outer working barrel |
| CN114687690A (en) * | 2022-03-31 | 2022-07-01 | 中海石油(中国)有限公司 | Slip setting mechanism and underground throttle comprising same |
-
2007
- 2007-07-25 CN CNU2007201698764U patent/CN201144674Y/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892823A (en) * | 2010-02-25 | 2010-11-24 | 中国石油天然气股份有限公司 | Method for throwing and fishing downhole choke without steel wire in natural gas well |
| CN101892823B (en) * | 2010-02-25 | 2013-02-20 | 中国石油天然气股份有限公司 | Method for throwing and fishing downhole choke without steel wire in natural gas well |
| CN101798913B (en) * | 2010-03-10 | 2012-11-14 | 中国石油天然气股份有限公司 | Differential pressure type downhole choke |
| CN101798913A (en) * | 2010-03-10 | 2010-08-11 | 中国石油天然气股份有限公司 | Differential pressure type downhole choke |
| 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 |
| CN103867167B (en) * | 2012-12-10 | 2016-08-10 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN103867167A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN103993856A (en) * | 2014-06-04 | 2014-08-20 | 西南石油大学 | Constant-pressure downhole throttle device |
| CN103993856B (en) * | 2014-06-04 | 2016-05-25 | 西南石油大学 | A kind of level pressure underground throttle device |
| CN105370252A (en) * | 2014-08-25 | 2016-03-02 | 中国石油天然气股份有限公司 | Condensate gas well exploitation method and equipment |
| CN105370252B (en) * | 2014-08-25 | 2017-11-10 | 中国石油天然气股份有限公司 | Condensate gas well exploitation method and equipment |
| CN106869873A (en) * | 2017-03-16 | 2017-06-20 | 濮阳市长盛石油技术有限公司 | Underground throttle device and application process |
| 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 |
| CN112302583A (en) * | 2019-07-29 | 2021-02-02 | 中国石油化工股份有限公司 | Restrictor and outer working barrel |
| CN112302583B (en) * | 2019-07-29 | 2023-03-14 | 中国石油化工股份有限公司 | Restrictor and outer working barrel |
| CN111206899A (en) * | 2020-01-07 | 2020-05-29 | 青岛理工大学 | Spring-driven step-by-step axial extrusion throttling device with double rubber cylinders |
| CN114687690A (en) * | 2022-03-31 | 2022-07-01 | 中海石油(中国)有限公司 | Slip setting mechanism and underground throttle comprising same |
| 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 |
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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 |
Granted publication date: 20081105 |
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| CX01 | Expiry of patent term |