CN104454477B - Sealing device for electric submersible reciprocating pump oil production system - Google Patents
Sealing device for electric submersible reciprocating pump oil production system Download PDFInfo
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- CN104454477B CN104454477B CN201410726053.1A CN201410726053A CN104454477B CN 104454477 B CN104454477 B CN 104454477B CN 201410726053 A CN201410726053 A CN 201410726053A CN 104454477 B CN104454477 B CN 104454477B
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- 238000007789 sealing Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title description 4
- 239000003921 oil Substances 0.000 claims abstract description 85
- 238000000605 extraction Methods 0.000 claims abstract description 22
- 239000010687 lubricating oil Substances 0.000 claims abstract description 5
- 239000003129 oil well Substances 0.000 claims description 20
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 18
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract 2
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000007654 immersion Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a sealing device for an oil extraction system of an electric submersible reciprocating pump, which comprises an electric submersible reciprocating pump cylinder, an oil pump pull rod and a linear motor, wherein the upper end and the lower end of the linear motor are respectively sealed and surrounded by an upper corrugated pipe and a lower corrugated pipe, the upper corrugated pipe and the lower corrugated pipe are respectively externally provided with an upper corrugated pipe protective pipe and a lower corrugated pipe protective pipe, and the high-elasticity corrosion-resistant rubber corrugated pipe is adopted, so that the complete isolation of a moving part of the submersible linear motor from well liquid is realized, and simultaneously, lubricating oil is filled in the corrugated pipes, so that a rotor shaft is always in a good lubricating state, and the fault-free working time of the oil extraction system of the electric submersible reciprocating pump.
Description
Technical field
The invention belongs to industrial gas oil underground operation tool technical field, it is specifically related to a kind of sealing device for electric submersible oil reciprocation pump oil extraction system, it is the sealing device designed for oil field electric submersible oil reciprocation pump oil extraction system, it is adaptable to use oil immersion line motor to connect the producing well of reciprocating pump lifting crude oil.
Background technology
Electric submersible oil reciprocation pump oil extraction system is that oil immersion line motor is placed in down-hole, straight reciprocating motion mechanical energy is converted electrical energy into by magnetic pumping, need not the actuating device of any intermediate conversion mechanism, thus directly drive oil well pump to realize moving back and forth, lifting oil pumping.
Such as Chinese patent CN103557145A, disclosing electric submersible oil reciprocation pump, including linear electric motors, oil well pump and ground control cabinet three part, linear electric motors are electric drive, linear motor rotor is connected with tubing pump push rod by polished rod, is provided with centralizer below linear electric motors；Oil well pump includes urceolus, inner core and plunger, is followed successively by connection coupling, push rod, feed liquor screen casing, plunger, travelling valve ball, travelling spring, standing valve ball, fixing spring, elevator position and box cupling in succession inside oil well pump from bottom to top.Described linear motor rotor is made up of permanent magnet, Ci Dui, center-pole；Permanent magnet uses non-corrosive alloy material seal；Magnetic heap and center-pole are stainless steel material；Linear motor stator electric is made up of winding iron core, inner core and shell；Bearing is not had between stator, mover；Mover iron hoop outer surface and stator support guide pin bushing and constitute friction pair；Linear electric motors outgoing cable uses stainless steel tube to protect, and stainless steel tube outer wall is weldingly connected at line outlet with field frame assembly；Outgoing cable docks with little flat cable in wiring cylinder.Described at feed liquor screen pipe sleeve on push rod, feed liquor screen casing upper end is provided with multi-blade and strike-offs device, closely cooperates with push rod.Described plunger
Outside is cased with sleeve pipe.Described standing valve ball upper end has installed spring reset guide valve additional.Annulus between described inner core and urceolus is sand-precipitating tube.Described standing valve ball is positioned at pump chamber upper end, and during ram travel to top dead centre, the distance between plunger and fixed ball seat is less than 10mm, and feed liquor screen casing 11 lower end is provided with cup of strike-ofing.
Well liquid is to lower and go up (peupendicular hole) and flow to oil well pump through linear electric motors outer wall, and motor is dispelled the heat by well liquid, and well liquid plays the effect of heating simultaneously, enhances the mobility of well liquid.The travelling-magnetic-field of motor stator alternation, has diluting effect to well liquid.When motor stator is up, well liquid was inhaled into motor counter balance pocket by counter balance pocket inlet opening within 1 second time；When motor stator is descending, the well liquid in counter balance pocket was got rid of by mover extruding within 1 second time.Go round and begin again, constantly oil reservoir is produced local assault, also can increase the mobility of fluid, the effective de-plugging problem solved, it is adapted to the exploitation of straight well, inclined shaft, horizontal well.
And for example Chinese patent CN202900189U, disclose a kind of electric submersible pump process pipe string, this electric submersible pump process pipe string includes tubing string assembly and the electric submersible pump assembly loaded in tubing string assembly, described tubing string assembly includes the oil pipe being inserted in inside pipe casing, the front end of oil pipe is provided with no killing well switch, described electric submersible pump assembly includes electric submersible pump and is installed on the no killing well switch operating rod of pump leading section, and described electric submersible pump is installed on inside oil pipe, and described no killing well switch operating rod is positioned at above no killing well switch.It is additionally provided with pump between described oil pipe and no killing well switch and connects seat, described electric submersible pump is provided with lock claw and is combined on pump connection seat with locking claw clip；It is provided with sealing ring between described lock claw and electric submersible pump；Described electric submersible pump front end connects the position of no killing well switch operating rod and is further opened with suction inlet；Described electric submersible pump rear end connects into cable, and this cable is covered in continuously in pipe by sealing；Described oil pipe is divided into the oil pipe that interconnective two sections of diameters are different, installs electric submersible pump in the oil pipe that diameter is big, installs packer and air bleeding valve between oil-pipe external wall and sleeve pipe that diameter is little；Described sleeve pipe is 7in sleeve pipe, and oil pipe is respectively 4in oil pipe and 5in oil pipe.
Tubing string uses up-thin-low-thick two-stage oil pipe combination, it is provided with outside the oil pipe of top without casing pressure packer, being provided with the no killing well switch connecting seat and unidirectional unlatching of plug-in type electric submersible pump bottom the oil pipe of bottom, this whole set of tubing string and tool combinations are installed on down-hole as the phase of column length in well casing.The plug-in type electric submersible pump of suction inlet underneath type is gone into the well by the conveying of continuous pipe, insert pump and connect locking, sealing in seat, no killing well switch operating rod opens no killing well switch simultaneously, gets through oil pipe passage, and stratum production fluid is via annular space output ground between pipe and oil pipe continuously, electric submersible pump lifting edge.When electric submersible pump trips out, no killing well switch is automatically switched off, and cuts off oil pipe passage.Use simple downhole tool to realize electric immersible pump well inspection pump snubbing serving, simplify work flow, shorten the activity duration, save job platform, save operating cost；Without kill-job during inspection pump, reduce reservoir damage, protect reservoir productivity.
Can be seen that from above-mentioned two patents, compared with oil pumper sucker rod pumping system, electric submersible oil reciprocation pump oil extraction system is owing to need not sucker rod, eliminate loss of plunger stroke, improve pumping efficiency of oil pump and running efficiency of system, reduction energy consumption, the most fundamentally solve the rod and tube partial-wear problem that directional well generally exists.
But discovery is investigated through both at home and abroad, the movable sealing Problem of Failure that current motor exists has become the big obstacle restricting these system popularization and application.Once movable sealing was lost efficacy, and will enter motor internal with the well liquid of impurity and cause mover magnet steel corrode, stator inner hole abrasion, and even motor damage has had a strong impact on the service life of this oil extraction system.Accordingly, it would be desirable to the dynamic sealing device of this system is redesigned to meet the production needs of oil well.
Summary of the invention
It is an object of the invention to overcome current motor to there is movable sealing lost efficacy, after seal failure, will enter motor internal with the well liquid of impurity and cause mover magnet steel to corrode, stator inner hole weares and teares, even motor damage, the problem having had a strong impact on the service life of this oil extraction system.
For this, the invention provides a kind of sealing device for electric submersible oil reciprocation pump oil extraction system, including the oil well pump pull bar within electric submersible oil reciprocation pump pump barrel, electric submersible oil reciprocation pump pump barrel, also include linear electric motors, oil well pump pull bar lower end connects the upper connecting rod upper end of linear electric motors, and the lower end of the motor urceolus of linear electric motors connects plug；
Upper connecting rod external wall of upper portion is cased with corrugated tube, upper corrugated tube is outside equipped with corrugated tube protecting tube, the upper end of upper corrugated tube is connected to oil well pump pull bar and upper connecting rod junction, the lower end of upper corrugated tube is connected to the upper end of motor urceolus, and the upper and lower side of upper corrugated tube protecting tube connects lower end and the upper end of motor urceolus of electric submersible oil reciprocation pump pump barrel respectively；
The lower link bottom outer wall of linear electric motors is cased with lower corrugated tube, lower corrugated tube is outside equipped with lower corrugated tube protecting tube, the upper end of lower corrugated tube connects the lower end of the motor tail pipe of linear electric motors, the lower end of lower corrugated tube connects lower link lower end, and the upper and lower side of lower corrugated tube protecting tube connects the lower end of motor tail pipe and the upper end of plug respectively.
Described oil well pump pull bar and upper connecting rod junction are provided with the first ring flange, and the upper end of motor urceolus is provided with the second ring flange, and the upper and lower side of upper corrugated tube is connected on the first ring flange and the second ring flange；
The lower end of described motor tail pipe is provided with three-flange dish, and lower link lower end is provided with the 4th ring flange, and the upper and lower side of lower corrugated tube is connected on three-flange dish and the 4th ring flange.
The inwall upper end of described upper corrugated tube protecting tube is threadedly attached in the outer wall lower end of electric submersible oil reciprocation pump pump barrel, the lower end of described upper corrugated tube protecting tube is bolted the upper end of motor urceolus, the inwall upper end of lower corrugated tube protecting tube is threaded connection the outer wall lower end of motor tail pipe, and the outer wall lower end of lower corrugated tube protecting tube is threaded connection the inwall upper end of plug.
The internally installed buffer spring having vertical direction of described plug, the upper end of described buffer spring is connected to lower link bottom, and the lower end of buffer spring is fixed on bottom plug.
Described upper corrugated tube and lower corrugated tube are rubber bellows.
Described upper corrugated tube and lower corrugated tube are embedded with stainless steel spring.
Described stainless steel spring is in free state when linear electric motors are in lower limit, and described stainless steel spring is in maximum energy storage state when linear electric motors are in upper limit.
Lubricating oil it is full of in described upper corrugated tube and lower corrugated tube.
The positive stop of the displacements such as multi-turn it is provided with on described upper corrugated tube protecting tube and lower corrugated tube protecting tube inwall.
Beneficial effects of the present invention: the present invention uses the anti-corrosion rubber bellows of high resiliency, achieve the thorough isolation of oil immersion line motor motion parts and well liquid, in corrugated tube, it is full of lubricating oil simultaneously, mover axle is made to be in good lubricating status all the time, it is ensured that the time between failures of electric submersible oil reciprocation pump oil extraction system.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
Description of reference numerals: 1, electric submersible oil reciprocation pump pump barrel；2, oil well pump pull bar；3, upper corrugated tube protecting tube；4, upper corrugated tube；5, motor urceolus；6, upper connecting rod；7, motor tail pipe；8, lower corrugated tube protecting tube；9, lower corrugated tube；10, lower link；11, plug；12, buffer spring.
Detailed description of the invention
The movable sealing Problem of Failure that motor exists at present has become the big obstacle restricting these system popularization and application.Once movable sealing was lost efficacy, and will enter motor internal with the well liquid of impurity and cause mover magnet steel corrode, stator inner hole abrasion, and even motor damage has had a strong impact on the service life of this oil extraction system.Accordingly, it would be desirable to the dynamic sealing device of this system is redesigned to meet the production needs of oil well.
Embodiment 1:
The present embodiment provides a kind of sealing device for electric submersible oil reciprocation pump oil extraction system, as shown in Figure 1, including the oil well pump pull bar 2 within electric submersible oil reciprocation pump pump barrel 1, electric submersible oil reciprocation pump pump barrel 1, also include linear electric motors, oil well pump pull bar 2 lower end connects upper connecting rod 6 upper end of linear electric motors, and the lower end of the motor urceolus 5 of linear electric motors connects plug 11；
Upper connecting rod 6 external wall of upper portion is cased with corrugated tube 4, upper corrugated tube 4 is outside equipped with corrugated tube protecting tube 3, the upper end of upper corrugated tube 4 is connected to oil well pump pull bar 2 and upper connecting rod 6 junction, the lower end of upper corrugated tube 4 is connected to the upper end of motor urceolus 5, and the upper and lower side of upper corrugated tube protecting tube 3 connects lower end and the upper end of motor urceolus 5 of electric submersible oil reciprocation pump pump barrel 1 respectively；
The lower link 10 bottom outer wall of linear electric motors is cased with lower corrugated tube 9, lower corrugated tube 9 is outside equipped with lower corrugated tube protecting tube 8, the upper end of lower corrugated tube 9 connects the lower end of the motor tail pipe 7 of linear electric motors, the lower end of lower corrugated tube 9 connects lower link 10 lower end, and the upper and lower side of lower corrugated tube protecting tube 8 connects lower end and the upper end of plug 11 of motor tail pipe 7 respectively.
This structure in the present embodiment makes corrugated tube 4 and lower corrugated tube 9 lay respectively at the top and bottom of linear electric motors, plays the effect that oil immersion line motor motion parts is thoroughly isolated with well liquid.Along with the axle of linear electric motors produces axial displacement (showing as upper connecting rod 6 and the axially reciprocating of lower link 10 in the present invention) when motion, corrugated tube 4 and lower corrugated tube 9 is made constantly to be stretched and compress, isolation well liquid enters inside submersible electric machine with oil, upper and lower corrugated tube protecting tube lays respectively at outside upper and lower rubber bellows, plays guide effect when deforming upon corrugated tube.
Embodiment 2:
Annexation everywhere in above-described embodiment 1, can be this situation in the present embodiment: oil well pump pull bar 2 and upper connecting rod 6 junction are provided with the first ring flange, the upper end of motor urceolus 5 is provided with the second ring flange, and the upper and lower side of upper corrugated tube 4 is connected on the first ring flange and the second ring flange；The lower end of motor tail pipe 7 is provided with three-flange dish, and lower link 10 lower end is provided with the 4th ring flange, and the upper and lower side of lower corrugated tube 9 is connected on three-flange dish and the 4th ring flange.
Ring flange connects the upper and lower pull bar of oil immersion line motor respectively, the ring flange being connected with corrugated tube double as ripple protecting tube support, prevent corrugated tube directly contact damage by friction corrugated tube with ripple protecting tube outside effect.
Several ring flanges in the present embodiment seal with upper corrugated tube 4 and lower corrugated tube 9 with being all connected with very much, well liquid will not be made to enter the motive position of linear electric motors from there, such structure is just so that the motive position of linear electric motors is sealed encirclement by ring flange, upper corrugated tube 4 and lower corrugated tube 9, during motion, there will not be well liquid can permeate, ensured that the complete seal of motor internal is run.
Embodiment 3:
The protection tubing string structure in the present embodiment of the periphery in above-described embodiment 1 is as follows, the inwall upper end of upper corrugated tube protecting tube 3 is threadedly attached in the outer wall lower end of electric submersible oil reciprocation pump pump barrel 1, the lower end of described upper corrugated tube protecting tube 3 is bolted the upper end of motor urceolus 5, the inwall upper end of lower corrugated tube protecting tube 8 is threaded connection the outer wall lower end of motor tail pipe 7, and the outer wall lower end of lower corrugated tube protecting tube 8 is threaded connection the inwall upper end of plug 11.
Upper corrugated tube 4 and the working environment of lower corrugated tube 9 has been ensured so that it is be not easily susceptible to the invasion of extraneous well fluid environment, be better able to the long-play of guarantee equipment, extend its service life to a certain extent by this kind of structure.
Embodiment 4:
On the basis of above-described embodiment 1,2,3, the present embodiment is at the internally installed buffer spring 12 having vertical direction of plug 11, and the upper end of described buffer spring 12 is connected to lower link 10 bottom, and the lower end of buffer spring 12 is fixed on bottom plug 11.
Because the running status of linear electric motors is for moving axially in reciprocal fashion, this kind of structure enables to the pull bar of linear electric motors certain buffering in running, will not mechanical colliding plug and make linear electric motors damaged.
Embodiment 5:
In the present embodiment, upper corrugated tube 4 and lower corrugated tube 9 are specially rubber bellows, and rubber bellows flexibility is stronger, on the premise of satisfied sealing, can the most constantly realize stretching and shrink, compared to the corrugated tube of other materials, being more suitable for the structure type of the present invention.And ripple struction can be designed to the vertical form in ripple both sides and make corrugated tube stretching and compression more smooth and easy, stress is less.
Further, upper corrugated tube 4 and lower corrugated tube 9 are embedded with stainless steel spring, are not only able to increase its elasticity, and are prevented from corrugated tube and are excessively stretched or compress.Stainless steel spring is in free state when linear electric motors are in lower limit, and described stainless steel spring is in maximum energy storage state when linear electric motors are in upper limit.Drag oil pump during the downward spaced motion of linear electric motors and discharge well liquid, spring release energy storage, reduce oil immersion line motor operating current, reduce system energy consumption.
In the present embodiment, it is full of lubricating oil in upper corrugated tube 4 and lower corrugated tube 9 so that the motive position of linear electric motors is in good lubricating status all the time, keeps inner chamber and well fluid pressure balance simultaneously.
Embodiment 6:
On the basis of above-described embodiment 1 to 5, the present embodiment is provided with on upper corrugated tube protecting tube 3 and lower corrugated tube protecting tube 8 inwall the positive stop of the displacements such as multi-turn.Owing to upper corrugated tube 4 and lower corrugated tube 9 are during moving back and forth, portion may be produced and stretch uneven state, overlap can be caused time serious, affect the service life of corrugated tube, the setting of these positive stops, is equivalent to corrugated tube divide into multiple junior unit part, and it is the same that each positive stop is equivalent to scraping brushing device, a bit of corrugated tube can be revised, it is ensured that unit corrugated tube uniform extension.
In sum, this sealing device for electric submersible oil reciprocation pump oil extraction system of the present invention, oil immersion line motor motion parts is thoroughly isolated with well liquid, to obtaining longer time between failures.
Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention belongs to protection scope of the present invention.
Claims (8)
1. the sealing device for electric submersible oil reciprocation pump oil extraction system, including electric submersible oil reciprocation pump pump barrel (1), the oil well pump pull bar (2) of electric submersible oil reciprocation pump pump barrel (1) inside, also include linear electric motors, it is characterized in that: oil well pump pull bar (2) lower end connects upper connecting rod (6) upper end of linear electric motors, the lower end of the motor urceolus (5) of linear electric motors connects plug (11)；
Upper connecting rod (6) external wall of upper portion is cased with corrugated tube (4), upper corrugated tube (4) is outside equipped with corrugated tube protecting tube (3), the upper end of upper corrugated tube (4) is connected to oil well pump pull bar (2) and upper connecting rod (6) junction, the lower end of upper corrugated tube (4) is connected to the upper end of motor urceolus (5), and the upper and lower side of upper corrugated tube protecting tube (3) connects lower end and the upper end of motor urceolus (5) of electric submersible oil reciprocation pump pump barrel (1) respectively；
Lower link (10) the bottom outer wall of linear electric motors is cased with lower corrugated tube (9), lower corrugated tube (9) is outside equipped with lower corrugated tube protecting tube (8), the upper end of lower corrugated tube (9) connects the lower end of the motor tail pipe (7) of linear electric motors, the lower end of lower corrugated tube (9) connects lower link (10) lower end, and the upper and lower side of lower corrugated tube protecting tube (8) connects lower end and the upper end of plug (11) of motor tail pipe (7) respectively；
Described oil well pump pull bar (2) and upper connecting rod (6) junction are provided with the first ring flange, and the upper end of motor urceolus (5) is provided with the second ring flange, and the upper and lower side of upper corrugated tube (4) is connected on the first ring flange and the second ring flange；
The lower end of described motor tail pipe (7) is provided with three-flange dish, and lower link (10) lower end is provided with the 4th ring flange, and the upper and lower side of lower corrugated tube (9) is connected on three-flange dish and the 4th ring flange.
2. the sealing device for electric submersible oil reciprocation pump oil extraction system as claimed in claim 1, it is characterized in that: the inwall upper end of described upper corrugated tube protecting tube (3) is threadedly attached in the outer wall lower end of electric submersible oil reciprocation pump pump barrel (1), the lower end of described upper corrugated tube protecting tube (3) is bolted the upper end of motor urceolus (5), the inwall upper end of lower corrugated tube protecting tube (8) is threaded connection the outer wall lower end of motor tail pipe (7), and the outer wall lower end of lower corrugated tube protecting tube (8) is threaded connection the inwall upper end of plug (11).
3. the sealing device for electric submersible oil reciprocation pump oil extraction system as claimed in claim 2, it is characterized in that: the internally installed buffer spring (12) having vertical direction of described plug (11), the upper end of described buffer spring (12) is connected to lower link (10) bottom, and the lower end of buffer spring (12) is fixed on plug (11) bottom.
4. the sealing device for electric submersible oil reciprocation pump oil extraction system as described in claim 1 or 2 or 3, it is characterised in that: described upper corrugated tube (4) and lower corrugated tube (9) they are rubber bellows.
5. the sealing device for electric submersible oil reciprocation pump oil extraction system as claimed in claim 4, it is characterised in that: described upper corrugated tube (4) and lower corrugated tube (9) are embedded with stainless steel spring.
6. the sealing device for electric submersible oil reciprocation pump oil extraction system as claimed in claim 5, it is characterized in that: described stainless steel spring is in free state when linear electric motors are in lower limit, described stainless steel spring is in maximum energy storage state when linear electric motors are in upper limit.
7. the sealing device for electric submersible oil reciprocation pump oil extraction system as described in claim 5 or 6, it is characterised in that: it is full of lubricating oil in described upper corrugated tube (4) and lower corrugated tube (9).
8. the sealing device for electric submersible oil reciprocation pump oil extraction system as described in claim 1 or 2 or 3 or 5 or 6, it is characterised in that: it is provided with the positive stop of the displacements such as multi-turn on described upper corrugated tube protecting tube (3) and lower corrugated tube protecting tube (8) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726053.1A CN104454477B (en) | 2014-12-04 | 2014-12-04 | Sealing device for electric submersible reciprocating pump oil production system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410726053.1A CN104454477B (en) | 2014-12-04 | 2014-12-04 | Sealing device for electric submersible reciprocating pump oil production system |
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| CN104454477A CN104454477A (en) | 2015-03-25 |
| CN104454477B true CN104454477B (en) | 2016-08-24 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929917B (en) * | 2015-05-18 | 2016-08-31 | 薛国清 | A kind of sealing system of oil immersion line motor |
| CN108590592B (en) * | 2018-07-02 | 2024-05-24 | 河北国创石油设备有限公司 | Underground linear motor oil pumping device |
| CN108612645A (en) * | 2018-07-02 | 2018-10-02 | 河北国创石油设备有限公司 | Down-hole linear motor pumping unit air assisted balancing device |
| CN109667749B (en) * | 2018-11-21 | 2020-04-10 | 大连华科机械有限公司 | Gas well pressure self-pumping pump |
| CN109854475A (en) * | 2019-04-04 | 2019-06-07 | 河北国创石油设备有限公司 | A kind of straight line latent oil lifting unit |
| CN114183100B (en) * | 2022-02-16 | 2022-09-27 | 中油智科(吉林)技术装备有限公司 | Rodless oil extraction integrated device of submersible linear motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1844668A (en) * | 2006-04-26 | 2006-10-11 | 许一星 | Down-hole corrugated pipe sealed and linear motor driven oil-well pump |
| CN2904441Y (en) * | 2006-05-26 | 2007-05-23 | 大庆油田有限责任公司 | Sand-proof oil-submersible linear motor |
| CN201063477Y (en) * | 2007-04-10 | 2008-05-21 | 胜利油田胜利泵业有限责任公司 | Fully sealed submersible linear motor |
| US8651837B2 (en) * | 2010-05-05 | 2014-02-18 | Baker Hughes Incorporated | Modular bellows with instrumentation umbilical conduit for electrical submersible pump system |
| CN202007642U (en) * | 2011-04-28 | 2011-10-12 | 陶桂林 | Wellhead sealing device for oil pumping unit |
| CN204371621U (en) * | 2014-12-04 | 2015-06-03 | 中国石油天然气股份有限公司 | Sealing device for electric submersible reciprocating pump oil production system |
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