CN106639958A - Pithead steam injection anti-leakage sealing device - Google Patents
Pithead steam injection anti-leakage sealing device Download PDFInfo
- Publication number
- CN106639958A CN106639958A CN201710016599.1A CN201710016599A CN106639958A CN 106639958 A CN106639958 A CN 106639958A CN 201710016599 A CN201710016599 A CN 201710016599A CN 106639958 A CN106639958 A CN 106639958A
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- China
- Prior art keywords
- packing
- sealing
- flexible pipe
- polished rod
- section
- 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
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- 238000007789 sealing Methods 0.000 title claims abstract description 91
- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 26
- 241000269793 Cryothenia peninsulae Species 0.000 title abstract 6
- 238000012856 packing Methods 0.000 claims abstract description 38
- 238000005461 lubrication Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims description 38
- 230000007704 transition Effects 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 241001633942 Dais Species 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000004519 grease Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 5
- 229920000265 Polyparaphenylene Polymers 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000007770 graphite material Substances 0.000 claims description 4
- -1 polyparaphenylene Polymers 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 7
- 239000000945 filler Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- 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)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of pithead anti-jet device, and provides a pithead steam injection anti-leakage sealing device. The device comprises a packing seal assembly, a flexible pipe and a secondary sealing assembly. The lower end of the packing sealing assembly is connected with the secondary sealing assembly through the flexible pipe. The secondary sealing assembly comprises an anti-jet cylinder and a sealing part. The lower end of the flexible pipe is fixedly installed on the upper end of the anti-jet cylinder. At least one sealing part is arranged in the anti-jet cylinder. The sealing part is a high temperature and high pressure resistant sealing part. The pithead steam injection anti-leakage sealing device is reasonable and compact in structure, and convenient to use. The anti-jet cylinder uses the flexible pipe connected with the packing sealing assembly. The camber wear situation between a pole and the sealing part is avoided. At the same time, the applied high temperature and high pressure resistant sealing ring can be used for long term in the high temperature and high pressure environment during the steam injection. The leakage is avoided. The effective sealing is guaranteed. The packing becomes simpler. The automatic lubrication is available. The downhole pressure can be predicted. The pithead steam injection anti-leakage sealing device can improve the effect of the dynamic sealing performance at the pithead packing sealing assembly.
Description
Technical field
The present invention relates to wellhead blowout preventer technical field, is a kind of Wellhead steam injection anti-pricked sealing device.
Background technology
The polish rod seal device for typically having bar producing well is made up of polished rod seal box, polished rod and rubber gate valve substantially, respectively
Have the disadvantage that：
First, polished rod seal box
1st, packing replacing trouble, high labor intensive;
Packing_seal chamber and polished rod match somebody with somebody synthesis of cyclic counterbore, and space is not only narrow but also deep, and rubber seal etc. is difficult to take out or loads, more
Change jobs trouble, and intensity is big；
2nd, non-design pressure observation valve or grease fitting on seal box, it is impossible to which anticipation is carried out to down-hole pressure；Down-hole feed flow is not enough
When, it is impossible to add lubricating oil to packing chamber, easily cause packing dry grinding failure, sealing cycle is short;
3rd, effectively solving eccentric wear problem is unable to, sealing cycle is short；
4th, under the HTHP of steam injection, because of sealed packing problem of materials, easily there are the accidents such as thorn leakage, Wellhead steam injection blowout.
2nd, polished rod
The polished rod in oil field is substantially divided to two classes：Common polished rod and surface spraying weld polished rod, have the disadvantage that respectively：
（One）Common polished rod
1st, the unprotected layer in common polished rod surface, the period of the day from 11 p.m. to 1 a.m of checking card, surface easily causes card trace, causes the sharp wear of packing,
Cause seal failure；
（Two）Surface anticorrosion polished rod
1st, outer diameter tolerance scope is big, and usually -0.25mm arrives+0.13mm；It is poor with the sealing effectiveness of packing endoporus；
2nd, polished rod surface does not have spacing mark, in lifting process, it is difficult to judge lower end position, easily causes well workover accident；
3rd, surface spraying weld layer or coating hardness are high, and optical-rod clamp is easily slipped, and form potential safety hazard.
The content of the invention
The invention provides a kind of Wellhead steam injection anti-pricked sealing device, overcomes the deficiency of above-mentioned prior art, its energy
Effectively solving, because of sealed packing problem of materials, easily occurs piercing the problem leaked under the HTHP of steam injection.
The technical scheme is that by following measures to realize：A kind of Wellhead steam injection anti-pricked sealing device, bag
Include packing_seal assembly, flexible pipe and secondary seal assembly；Two grades are connected with the lower end of packing_seal assembly by flexible pipe
Seal assembly；Secondary seal assembly includes anti-spraying tube and seal；The lower end of flexible pipe is fixedly mounted on the upper end of anti-spraying tube
Together, at least one seal is built-in with anti-spraying tube, seal is high temperature high voltage resistant seal.
The further optimization and/or improvements to foregoing invention technical scheme are presented herein below：
Above-mentioned high temperature high voltage resistant seal can be in flexible sealing ring of the opening towards the inverted L-shaped of lower outside for section, in flexibility
The lower end of the vertical section of sealing ring slopes inwardly and forms frustum；Screw thread is provided with the downside of anti-spraying tube, and is threadably secured
Lower hold-down ring is installed, from the bottom to top successively interval is installed with least together soft in the anti-spraying tube of lower hold-down ring upper end
Property sealing ring, in the anti-spraying tube between adjacent flexible sealing ring support ring is provided with；The section of support ring is L-shaped, support ring with
Mutually button is installed together the flexible sealing ring of its upper end；Conic clamp corresponding with frustum is provided with the horizontal segment upper end of support ring
Groove, frustum is stuck in taper draw-in groove；Screw thread is provided with the upside of anti-spraying tube, and is threadably secured that be provided with can be flexible close
Seal ring and support ring are pressed on downwards the upper hold-down ring on lower hold-down ring.
The upside of above-mentioned flexible pipe can be provided with external screw thread, and flexible pipe upside is fixedly mounted by screw thread with packing_seal assembly
Together；External screw thread is provided with the downside of flexible pipe, flexible pipe downside is fixedly installed togather by screw thread with anti-spraying tube；Soft
Property pipe downside outside be threadably secured the upper standby tight nut that can be held out against on anti-spraying tube top be installed；Or/and, anti-spraying tube lower end
It is threadably secured on lower hold-down ring and lower standby tight nut is installed.
Above-mentioned packing_seal assembly may include base lower box body, upper cartridge body and briquetting；It is provided with the top of base lower box body
The counterbore of opening upwards, the upper end of base lower box body is fixedly connected with upper cartridge body, is provided with corresponding with counterbore logical in upper cartridge body
Hole, forms packing filling groove between through hole and counterbore, being installed with the top of through hole can be pressed abd fixed on disk by packing
Briquetting in root packing groove；The lubrication emptying passage of up/down perforation is provided with lower box body base, is provided with base lower box body
The injecting hole of the radial direction being connected with lubrication emptying passage；Flexible pipe upper end is fixedly mounted in the downside of base lower box body.
The counterbore base of above-mentioned base lower box body can respectively be built-in with the copper sheathing that polished rod can be made placed in the middle, and the upper end of copper sheathing can set
Have a packing pressure-bearing groove, packing pressure-bearing groove for flat cone groove wide at the top and narrow at the bottom；Being respectively fixed with briquetting lower end can make light
Bar copper packing placed in the middle；Or/and, outside the middle part of upper cartridge body can circumference be installed with least one opening taper knob outwardly；
Removable handlebar is separately installed with taper knob.
Grease fitting can be installed with above-mentioned injecting hole；Or, being installed with atmospheric valve at injecting hole；Or, in note
Shape internal thread is provided with the external port in agent hole, and be threadably secured be provided with injecting emptying mouth, injecting emptying mouth in be provided with
The horizontal channel of injecting hole connection, on the injecting emptying mouth of horizontal channel right part side opening is provided with, and is led in the right part of horizontal channel
Cross to be screwed and the plug that can be blocked side opening is installed.
It is above-mentioned to may also include polished rod；The upper end of polished rod is section of checking card, and the polished rod on the downside of section of checking card is surfacing section, and packing is close
Envelope assembly, flexible pipe and seal assembly are arranged on outside the surfacing section of polished rod；Upset head is fixed with surfacing section lower end；In surfacing
The polished rod of section is outer and upset head is externally provided with spray-welding coating.
Can be provided with arc transition section between above-mentioned upset head top and polished rod, the cylindricity of arc transition section be 0.01 to
0.03；The axiality of arc transition section is 0.01 to 0.03；The surface roughness of arc transition section is 0.4 to 6.3.
Above-mentioned high temperature high voltage resistant seal can be the sealing ring of polyparaphenylene material or the sealing ring of polytetrafluoroethylmaterial material
Or the sealing ring of graphite material；Or/and, interval is installed with outer protection tube, outer protection tube on the packing_seal assembly outside flexible pipe
Lower end in be provided with limited ring dais, limited ring dais are located at the surface of secondary seal assembly；Limited ring dais lower end and secondary seal
Flexible pipe compression spacing is formed between assembly top.
Present configuration is reasonable and compact, easy to use；Anti-spraying tube employs flexible pipe and is connected on packing_seal assembly,
Therefore anti-spraying tube can be moved with the skew of oil pumping polish rod, be not in the situation of polished rod and seal eccentric wear；Adopt simultaneously
High temperature high voltage resistant sealing ring, can for a long time use in the high temperature and high pressure environment of steam injection, it is to avoid thorn leakage, it is ensured that effectively sealing；
In addition, this sealing device is also convenient with packing replacing, can self-lubricating, down-hole pressure carries out anticipation；Spray on polished rod surface
Weldering, improves the effect with the dynamic sealing performance of the packing_seal assembly of well head.
Description of the drawings
Accompanying drawing 1 is the cross section structure diagram of preferred embodiment.
Coding in accompanying drawing is respectively：1 is flexible pipe, and 2 is anti-spraying tube, and 3 is flexible sealing ring, and 4 is horizontal channel, and 5 are
Upper hold-down ring, 6 is lower hold-down ring, and 7 is frustum, and 8 is support ring, and 9 is arc transition section, and 10 is upset head, and 11 is upper standby tight
Nut, 12 are lower standby tight nut, and 13 is standby tight ring, and 14 is outer protection tube, and 15 is limited ring dais, and 16 is base lower box body, and 17 is upper
Box body, 18 is briquetting, and 19 are lubrication emptying passage, and 20 is injecting hole, and 21 is taper knob, and 22 is copper sheathing, and 23 is copper packing, and injecting is put
Empty mouth 24,25 is plug, and 26 is side opening, and 27 are section of checking card, and 28 is surfacing section, and 34 is handlebar 29.
Specific embodiment
The present invention is not limited by following embodiments, can technology according to the present invention scheme and actual conditions determining specifically
Embodiment.
In the present invention, for the ease of description, the description of the relative position relation of each part is according to Figure of description 1
Butut mode being described, such as：The position relationship of upper and lower, left and right etc. is according to the Butut direction of Figure of description 1
Come what is determined.
With reference to embodiment and accompanying drawing, the invention will be further described：
As shown in Figure 1, the Wellhead steam injection anti-pricked sealing device includes that packing_seal assembly, flexible pipe 1 and secondary seal are total
Into；Secondary seal assembly is connected with by flexible pipe 1 in the lower end of packing_seal assembly；Secondary seal assembly includes anti-spraying tube 2
And seal；The lower end of flexible pipe 1 is fixedly installed togather with the upper end of anti-spraying tube 2, is built-in with least one in anti-spraying tube 2 close
Sealing, seal is high temperature high voltage resistant seal.When using, polished rod penetrates from top to bottom packing_seal assembly, flexible pipe 1 and prevents
In spray canister 2, the high temperature high voltage resistant seal in anti-spraying tube 2 can be by polished rod seal；Connect because anti-spraying tube 2 employs flexible pipe 1
It is connected on packing_seal assembly, therefore anti-spraying tube 2 can be moved with the skew of oil pumping polish rod, be not in polished rod and seal
The situation of eccentric wear, improves the sealing effectiveness of high temperature high voltage resistant seal, can for a long time use in the high temperature and high pressure environment of steam injection,
Avoid thorn leakage, it is ensured that effectively sealing.
Above-mentioned Wellhead steam injection anti-pricked sealing device can be made further optimization and/or improvements according to actual needs：
As shown in Figure 1, high temperature high voltage resistant seal is section in flexible sealing ring 3 of the opening towards the inverted L-shaped of lower outside；
Slope inwardly in the lower end of the vertical section of flexible sealing ring and form frustum 7；Screw thread is provided with the downside of anti-spraying tube 2, and is passed through
It is screwed and lower hold-down ring 6 is installed, from the bottom to top successively interval is installed with the anti-spraying tube 2 of the upper end of lower hold-down ring 6
Support ring 8 is installed in flexible sealing ring 3 at least together, the anti-spraying tube 2 between adjacent flexible sealing ring 3；Support ring 8 cut
Face is L-shaped, and support ring 8 is mutually detained with the flexible sealing ring 3 of its upper end and is installed together；It is provided with the horizontal segment upper end of support ring 8
Taper draw-in groove corresponding with frustum 7, frustum 7 is stuck in taper draw-in groove；Screw thread is provided with the upside of anti-spraying tube 2, and by spiral shell
Line is installed with the upper hold-down ring 5 that can be downwards pressed on flexible sealing ring 3 and support ring 8 on lower hold-down ring 6.Upper hold-down ring
5 and lower hold-down ring 6 flexible sealing ring 3 can be pressed abd fixed in anti-spraying tube 2, can further improve flexible sealing ring 3
Sealing effectiveness, it is to avoid reveal；Support ring 8 can improve the rigidity of secondary seal assembly；And support is played to flexible sealing ring 3
Effect, facilitates the dismounting of flexible sealing ring 3；Wherein, the taper draw-in groove of support ring 8 is used to install positioning to flexible sealing ring 3
Effect.
As shown in Figure 1, external screw thread is provided with the upside of flexible pipe 1, the upside of flexible pipe 1 is total with packing_seal by screw thread
Into being fixedly installed togather；External screw thread is provided with the downside of flexible pipe 1, peace is fixed in the downside of flexible pipe 1 by screw thread with anti-spraying tube 2
It is fitted together；It is threadably secured outside the downside of flexible pipe 1 and the upper standby tight nut 11 that can be held out against on the top of anti-spraying tube 2 is installed；
Using the flexible pipe 1 of threaded connection, that is, the sealing of flexible pipe 1 is ensure that, the dismounting of flexible pipe 1 is facilitated again；Or/and, blowout prevention
It is threadably secured on the lower hold-down ring 6 of 2 lower ends of cylinder and lower standby tight nut 12 is installed.Upper standby tight nut 11 and lower standby tight nut
12 effects for each serving as locking thread.
As shown in Figure 1, packing_seal assembly includes base lower box body 16, upper cartridge body 17 and briquetting 18；Base lower box body
The counterbore of opening upwards is provided with 16 top, the upper end of base lower box body 16 is fixedly connected with upper cartridge body 17, in upper cartridge body 17
Through hole corresponding with counterbore is inside provided with, packing filling groove is formed between through hole and counterbore, be installed with the top of through hole
The briquetting 18 that packing can be pressed abd fixed in packing filling groove；The lubrication emptying that up/down perforation is provided with lower box body base is logical
Road 19, is provided with the injecting hole 20 of the radial direction being connected with lubrication emptying passage 19 on base lower box body 16；The upper end of flexible pipe 1 is consolidated
Dingan County is mounted in the downside of base lower box body 16.Using such packing_seal assembly when packing filling is changed, can first the bottom of by
Seat lower box body 16, upper cartridge body 17 and briquetting 18 are unloaded respectively after separating, then carry out old filler taking-up and new replacement, are more saved time
It is laborsaving；After the depth of the lower box body counterbore after especially splitting substantially shoals, not only facilitate old filler to clear up, be also convenient for new filler
Coiling install, reduce packing replacing labour intensity；Grease fitting can be installed at injecting hole 20 to realize oil injecting lubricating
Effect；Or atmospheric valve is installed at injecting hole 20, and anticipation is accomplished to down-hole pressure, improve security.
As shown in Figure 1, the counterbore base of base lower box body 16 is built-in with respectively the copper sheathing 22 that polished rod can be made placed in the middle；Copper sheathing
22 and copper packing 23 not only act as the effect of auxiliary polished rod centering, can also protect polished rod, it is to avoid polished rod is respectively directly and unit block
Friction is come in contact between lower box body 21, base lower box body 16, briquetting 18 and unit block briquetting 23；The upper end of copper sheathing 22 is provided with
Packing pressure-bearing groove, packing pressure-bearing groove for flat cone groove wide at the top and narrow at the bottom；Packing can so be increased and bear thrust, be prolonged
The sealing cycle of long packing；The copper packing 23 that polished rod can be made placed in the middle is respectively fixed with the lower end of briquetting 18.
As shown in Figure 1, the middle part excircle of upper cartridge body 17 is installed with least one opening taper knob 21 outwardly；
It is installed with removable handlebar 29 respectively on taper knob 21.Can be to upper cartridge body 17, unit block with handlebar 29
Lower box body 21 and unit block upper cartridge body 22 apply torque, and realization is tightened, loosens operation；At ordinary times handlebar 29 can be from taper knob
Disassemble at 21, taken up room with reducing, reduce the radius of gyration of this seal box, to in-site installation and operating space adaptability
More preferably.
As shown in Figure 1, it is installed with grease fitting at injecting hole 20；Grease fitting is applied not only to fill lubricating oil,
Down-hole pressure can also be judged by the airflow condition sprayed from grease fitting；Or, being installed with emptying at injecting hole 20
Valve；Or, be provided with shape internal thread at the external port in injecting hole 20, and it is threadably secured injecting emptying mouth 24, injecting is installed
The horizontal channel 4 connected with injecting hole 20 is provided with emptying mouth 24, on the injecting emptying mouth 24 of the right part of horizontal channel 4 side is provided with
Hole 26, is threadably secured in the right part of horizontal channel 4 and is provided with the plug 25 that can be blocked side opening 26；In emptying and note lubrication
When oily, inject or deflate by side opening 26；So need not only remove plug 25, moreover it is possible to which closing is quickly tightened by plug 25
Side opening 26, the problem that pressure is easily shut off greatly when prevention is deflated improves site safety；In addition, injecting emptying mouth 24
It is threadedly coupled using shape, plays a part of further to improve sealing.
As shown in Figure 1, also including polished rod；The upper end of polished rod is section 27 of checking card, and the polished rod in the downside of section 27 of checking card is spray
Weldering section 28, packing_seal assembly, flexible pipe 1 and seal assembly are arranged on outside the surfacing section 28 of polished rod；It is solid in the lower end of surfacing section 28
Surely there is upset head 10；Spray-welding coating is externally provided with outside the polished rod of surfacing section 28 with upset head 10.When in use, polished rod is checked card
Section 27 above connects oil pumper by installing optical-rod clamp；The lower end of polished rod under upset head 10 by connecing oil pump plunger piston；Polished rod
Surfacing section 28 contacts and is formed dynamic sealing with the packing_seal of well head；Increase spray-welding coating in the surfacing section 28 of polished rod, be prevented from
Polished rod surface damage, keeps smooth surface, makes sealing more preferable；In the surface not surfacing of the section 27 of checking card of polished rod, polish rod clamp is made
Sub- reliable lock, prevents slippage accident；The thickness of spray-welding coating is 0.2 millimeter to 0.4 millimeter, can further be strengthened to surfacing section
Outer and upset head 10 the protection of 28 polished rods；The outer diameter tolerance scope of the polished rod of surfacing section 28 is -0.1 millimeter to 0 millimeter, chi
It is very little more accurate, improve the dynamic sealing performance with the packing_seal assembly of well head, using more convenient, extend working life.
As shown in Figure 1, arc transition section 9, the circle of arc transition section 9 are provided between the top of upset head 10 and polished rod
Post degree is 0.01 to 0.03；The axiality of arc transition section 9 is 0.01 to 0.03；The surface roughness of arc transition section 9 is 0.4
To 6.3.When using, need by installing seal come the space between sealing oil pump plunger and polished rod in arc transition section 9；Cause
Cylindricity, axiality and the surface roughness that this is carried out to arc transition section 9 is further limited, i.e. the circle of arc transition section 9
Post degree is 0.01 to 0.03；The axiality of arc transition section 9 is 0.01 to 0.03；The surface roughness of arc transition section 9 is 0.4
To 6.3；The effective sealing at arc transition section 9 is so ensure that, sealing effectiveness between fuel feed pump plunger and polished rod is improved.
As shown in Figure 1, high temperature high voltage resistant seal is the sealing ring or polytetrafluoroethylmaterial material of polyparaphenylene material
The sealing ring of sealing ring or graphite material；The sealing ring of polyparaphenylene material or the sealing ring of polytetrafluoroethylmaterial material or graphite material
The sealing ring of material is existing known seal.
As shown in Figure 1, interval is installed with outer protection tube 14, outer protection tube on the packing_seal assembly outside flexible pipe 1
Limited ring dais 15 are provided with 14 lower end, limited ring dais 15 are located at the surface of secondary seal assembly；The lower end of limited ring dais 15 with
The compression spacing of flexible pipe 1 is formed between secondary seal assembly top.When polished rod is moved upwards, frictional force can be resisted, be protected
Flexible pipe 1 is not by excessive compression.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and it has stronger adaptability and optimal enforcement effect
Really, can according to actual needs increase and decrease non-essential technical characteristic to meet the demand of different situations.
Claims (10)
1. a kind of Wellhead steam injection anti-pricked sealing device, it is characterised in that including packing_seal assembly, flexible pipe and secondary seal
Assembly；Secondary seal assembly is connected with by flexible pipe in the lower end of packing_seal assembly；Secondary seal assembly includes anti-spraying tube
And seal；The lower end of flexible pipe is fixedly installed togather with the upper end of anti-spraying tube, and in anti-spraying tube at least one sealing is built-in with
Part, seal is high temperature high voltage resistant seal.
2. Wellhead steam injection anti-pricked sealing device according to claim 1, it is characterised in that high temperature high voltage resistant seal is
Section is in flexible sealing ring of the opening towards the inverted L-shaped of lower outside, is sloped inwardly in the lower end of the vertical section of flexible sealing ring
And form frustum；Screw thread is provided with the downside of anti-spraying tube, and is threadably secured lower hold-down ring is installed, in lower hold-down ring upper end
Anti-spraying tube in from the bottom to top successively interval is installed with flexible sealing ring at least together, between adjacent flexible sealing ring
Support ring is installed in anti-spraying tube；The section of support ring is L-shaped, and support ring is mutually detained with the flexible sealing ring of its upper end and is arranged on one
Rise；Taper draw-in groove corresponding with frustum is provided with the horizontal segment upper end of support ring, frustum is stuck in taper draw-in groove；In anti-spraying tube
Screw thread is provided with upside, and is threadably secured and is provided with and flexible sealing ring and support ring can be downwards pressed on lower hold-down ring
Upper hold-down ring.
3. Wellhead steam injection anti-pricked sealing device according to claim 2, it is characterised in that be provided with outer on the upside of flexible pipe
Screw thread, flexible pipe upside is fixedly installed togather by screw thread with packing_seal assembly；External screw thread is provided with the downside of flexible pipe,
Flexible pipe downside is fixedly installed togather by screw thread with anti-spraying tube；Installation is threadably secured outside the downside of flexible pipe can push up
The tight upper standby tight nut on anti-spraying tube top；Or/and, be threadably secured on the lower hold-down ring of anti-spraying tube lower end be provided with it is lower standby
Tight nut.
4. the Wellhead steam injection anti-pricked sealing device according to claim 1 or 2 or 3, it is characterised in that packing_seal assembly
Including base lower box body, upper cartridge body and briquetting；The counterbore of opening upwards is provided with the top of base lower box body, base lower box body
Upper end is fixedly connected with upper cartridge body, and through hole corresponding with counterbore is provided with upper cartridge body, packing is formed between through hole and counterbore and is filled out
Hopper, is installed with the briquetting that can be pressed abd fixed on packing in packing filling groove in the top of through hole；At lower box body bottom
The lubrication emptying passage of up/down perforation is provided with seat, is provided with base lower box body and is vented the radial direction that passage is connected with lubrication
Injecting hole；Flexible pipe upper end is fixedly mounted in the downside of base lower box body.
5. Wellhead steam injection anti-pricked sealing device according to claim 4, it is characterised in that the counterbore bottom of base lower box body
Portion is built-in with respectively the copper sheathing that polished rod can be made placed in the middle, and the upper end of copper sheathing is provided with packing pressure-bearing groove, packing pressure-bearing groove for upper
Narrow flat cone groove under width；The copper packing that polished rod can be made placed in the middle is respectively fixed with briquetting lower end；Or/and, outside the middle part of upper cartridge body
Circumference is installed with least one opening taper knob outwardly；Removable handlebar is separately installed with taper knob.
6. Wellhead steam injection anti-pricked sealing device according to claim 5, it is characterised in that injecting is installed with hole
Grease fitting；Or, being installed with atmospheric valve at injecting hole；Or, being provided with shape internal thread at the external port in injecting hole, and pass through
It is screwed and injecting emptying mouth is installed, in injecting emptying mouth the horizontal channel connected with injecting hole is provided with, it is right in horizontal channel
The injecting emptying mouth in portion is provided with side opening, be threadably secured in the right part of horizontal channel be provided with can by side opening block it is stifled
Head.
7. the Wellhead steam injection anti-pricked sealing device according to claim 1 or 2 or 3 or 5 or 6, it is characterised in that also include
Polished rod；To check card section, the polished rod on the downside of section of checking card is surfacing section, packing_seal assembly, flexible pipe and sealing for the upper end of polished rod
Assembly is arranged on outside the surfacing section of polished rod；Upset head is fixed with surfacing section lower end；With upset bar outside the polished rod of surfacing section
Head is externally provided with spray-welding coating.
8. Wellhead steam injection anti-pricked sealing device according to claim 4, it is characterised in that also including polished rod；Polished rod it is upper
Hold as section of checking card, the polished rod on the downside of section of checking card is surfacing section, packing_seal assembly, flexible pipe and seal assembly are arranged on polished rod
Surfacing section outside；Upset head is fixed with surfacing section lower end；Spray-welding coating is externally provided with outside the polished rod of surfacing section with upset head.
9. Wellhead steam injection anti-pricked sealing device according to claim 8, it is characterised in that upset head top and polished rod
Between be provided with arc transition section, the cylindricity of arc transition section is 0.01 to 0.03；The axiality of arc transition section be 0.01 to
0.03；The surface roughness of arc transition section is 0.4 to 6.3.
10. the Wellhead steam injection anti-pricked sealing device according to claim 1 or 2 or 3 or 5 or 6 or 9, it is characterised in that resistance to
The sealing ring of HTHP seal polyparaphenylene material or the sealing ring or the sealing ring of graphite material of polytetrafluoroethylmaterial material；
Or/and, interval is installed with outer protection tube on the packing_seal assembly outside flexible pipe, and in the lower end of outer protection tube spacing ring is provided with
Platform, limited ring dais are located at the surface of secondary seal assembly；Form soft between limited ring dais lower end and secondary seal assembly top
Property pipe compression spacing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016599.1A CN106639958B (en) | 2017-01-10 | 2017-01-10 | Wellhead steam injection puncture-proof sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016599.1A CN106639958B (en) | 2017-01-10 | 2017-01-10 | Wellhead steam injection puncture-proof sealing device |
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| CN106639958A true CN106639958A (en) | 2017-05-10 |
| CN106639958B CN106639958B (en) | 2023-04-07 |
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| CN109184582A (en) * | 2018-09-17 | 2019-01-11 | 克拉玛依胜利高原机械有限公司 | The replaceable assembly of split type polished rod, polished rod and polished rod Replacement procedure |
| CN109322636A (en) * | 2017-07-31 | 2019-02-12 | 克拉玛依胜利高原机械有限公司 | A kind of oil field shaft mouth blowout hookup |
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|---|---|
| CN106639958B (en) | 2023-04-07 |
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