CN108412444A - Rodless pump fluid power paraffin cleaner well head launches retracting device - Google Patents
Rodless pump fluid power paraffin cleaner well head launches retracting device Download PDFInfo
- Publication number
- CN108412444A CN108412444A CN201810384728.7A CN201810384728A CN108412444A CN 108412444 A CN108412444 A CN 108412444A CN 201810384728 A CN201810384728 A CN 201810384728A CN 108412444 A CN108412444 A CN 108412444A
- Authority
- CN
- China
- Prior art keywords
- flange
- cylinder
- level
- folding
- slip pipe
- 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
Links
- 239000012188 paraffin wax Substances 0.000 title claims abstract description 54
- 239000012530 fluid Substances 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000001993 wax Substances 0.000 abstract description 24
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005493 welding type Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008141 laxative Substances 0.000 description 1
- 230000002475 laxative effect Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 230000032258 transport Effects 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
Landscapes
- 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
A kind of rodless pump fluid power paraffin cleaner well head dispensing retracting device.Main purpose be using the device may be implemented to rodless pump producing well fluid power automatic wax removal apparatus well head dispensing and recycling.It is characterized in that：Including upper and lower two-part structure, top is divided into hydraulic cylinder, and lower part is paraffin cleaner recovery unit, and telescopic hydraulic cylinder is for promoting fluid power paraffin cleaner downlink；Hydraulic cylinder is connected by flange form cylinder barrel with the paraffin cleaner recovery unit of lower section, and paraffin cleaner recovery unit is mainly made of folding and unfolding cylinder, slip pipe, slip ring, spring catch etc.；Wherein, track pin is placed in across slip ring in slip pipe track, and slip pipe deployed configuration is the track of two kinds of different lengths, and under the action of fluid power paraffin cleaner, slip pipe can move up and down, and slip ring is fixed by lower flange and level-one folding and unfolding cylinder；Spring latch structure is made of lower flange, steel ball, compressed spring, sealing ring, side bolt, and spring latch structure is used for blocking paraffin cleaner after initial and paraffin cleaner third time wax removal.
Description
Technical field
The present invention relates to a kind of dispensing of well head fluid power paraffin cleaner and retracting devices, can be applied to oil machinery wax removal process
In, realize automation.
Background technology
Currently, each oilfield exploitation all has been enter into the middle and later periods, the yield of waxy crude oil increases sharply, molten in oil recovery process
Wax of the solution in crude oil can be precipitated with crystal form and is adsorbed on oil pipe and underground equipment, and oil well paraffinication does not only result in fluid act
The overflow section risen becomes smaller, and increases the local resistance of fluid, can also influence the normal work of oil well rig, oil field is significantly greatly increased and adopts
Oily cost.Oilfield submersible pump generally uses now, not with submersible screw pump and down-hole linear motor oil extraction system technology
Disconnected development so that rodless pump pumpingh well quantity is continuously increased, and the liquid stream that rodless pump oil production method changes in original tubing string transports
Condition, while also increasing the chance of wax deposition.For rodless pump well tubing wax problem, devises fluid power paraffin removal unit and apply
Patent of invention, during wax removal, fluid power paraffin removal unit controls wax removal by changing the annular space area of passage formed in oil pipe
The hydraulic power size that device is born realizes rise and fall.Hydraulic automatic paraffin removal unit is not necessarily to additionaling power, and scraper is received when downlink
It returns, diameter is small, is easy to transfer, and wax removal diameter is flexibly controllable.Fluid power paraffin removal unit need to put into well before work in rodless pump well head
In, after completing wax removal operation, it need to also be recycled out of well, entire dispensing-wax removal-removal process oil well responding curve of well, therefore, it is necessary to
Design launches retracting device to realize above-mentioned function.
Invention content
The technical issues of in order to solve to be previously mentioned in background technology, the present invention provide a kind of rodless pump fluid power paraffin cleaner well head
Retracting device is launched, this kind of apparatus structure is simple, ingenious in design, can realize dispensing and the removal process of fluid power paraffin cleaner.
The technical scheme is that：This kind of rodless pump fluid power paraffin cleaner well head launches retracting device, including telescopic hydraulic
Cylinder, level-one folding and unfolding cylinder and two level folding and unfolding cylinder, are unique in that：
The telescopic hydraulic cylinder is double acting two-stage telescopic cylinder, and oil inlet and outlet has level-one in cylinder barrel 1, the telescopic hydraulic cylinder
Piston rod and second piston rod, the cylinder barrel are flange form cylinder barrel, and are integral type.
The upper end of level-one folding and unfolding cylinder is connected with level-one folding and unfolding drum flange by welding；The lower end of level-one folding and unfolding cylinder passes through
The mode of welding is connected with upper flange；The upper end of two level folding and unfolding cylinder is connected with lower flange by welding, and two level is received
The lower end for putting cylinder is connected with wellhead flange by welding；The ring flange of hydraulic cylinder flange and level-one folding and unfolding drum flange it
Between, the first non-metallic gasket is placed, fastening bolt and nut check are passed through.
On the ring flange of lower flange, it is radially provided with the tapped through-hole of at least four, the through-hole is evenly distributed on method
On blue disk, the point of the center line of the through-hole is located on the ring flange center line of lower flange；In the through-hole from inside and outside
It is equipped with steel ball, compressed spring, sealing ring and side bolt successively, side bolt is connected through a screw thread with the through-hole；The top of side bolt
End is touched with compressed spring, to realize the compression to compressed spring；The inner curve of the through-hole is arc, so that steel ball is stretched
The part for going out the through-hole is less than half.
Described device further includes slip pipe and slip ring；The upper rail and lower railway being recessed inwardly are provided on slip pipe；The upper rail
Road by three crown angles it is identical fall sawtooth connected by arc transition after constitute, three circular arcs are three be located above
A stationary point position, the included angle formed between the first guide surface and the second guide surface of the crown of falling sawtooth are less than 60 degree；Institute
It states lower railway and the first vertical slots, the second vertical slots and third vertical slots company is passed sequentially through by the identical positive sawtooth of three crown angles
It is constituted after connecing, wherein the second vertical slots are identical with the depth of third vertical slots, and the first vertical slots are longer than other two vertical slots
Depth；The included angle constituted between the third guide surface and the 4th guide surface of the positive sawtooth crown is equal to 60 degree, the upper rail
Sawtooth corresponds to a vertical slots of the lower railway in the axial direction in each of road, but passes through the slip pipe axis of the crown of falling sawtooth
It is misaligned to section and the slip pipe axial slices of the process vertical slots center line；The upper rail and lower railway are flat on slip pipe
Face displaypattern is closed figures；Slip ring is fixed in the inner cylinder of upper flange, and the pin hole being inserted into for track pin is provided on slip ring；
Slip ring is placed on the outer wall of slip pipe, and track pin is placed in across slip ring in the track of slip pipe.
The present invention has the advantages that：This kind of dispensing retracting device includes mainly that telescopic hydraulic cylinder is recycled with paraffin cleaner
Unit, the telescopic hydraulic cylinder are double acting two-stage telescopic cylinder, and oil inlet and outlet passes through down-hole liquid pressure and three in cylinder tube
Position four-way valve control hydraulic cylinder piston rod stretching and withdrawal, the paraffin cleaner recovery unit mainly include slip pipe slip ring structure with
Spring latch structure.Slip pipe outer wall is equipped with track, passes through track pin connection with slip ring.By the relative motion of track pin and slip pipe,
The control and recycling to paraffin cleaner three-level wax removal can be achieved.Spring latch structure is by steel ball, spring, the compositions such as sealing ring and bolt,
In flange, totally four, it is evenly distributed in flange.It is designed as arc on the inside of through-hole in flange, ensures that steel ball leaks out
Part is less than half, and in Hydraulic Cylinder paraffin cleaner downlink, steel ball is retracted, and spring is compressed, and paraffin cleaner is smoothly transported downwards
It is dynamic.After paraffin cleaner third time wax removal is completed, paraffin cleaner is stuck on spring catch, to complete the recycling work to paraffin cleaner
Make.
First, this kind of retracting device promotes fluid power paraffin cleaner downlink using telescopic hydraulic cylinder, can effectively lower stroke, saves
Space, and the pressure of down-hole liquid is effectively utilized；Secondly, slip pipe slip ring and spring catch in this kind of retracting device are set
The characteristics of fluid power paraffin cleaner itself is utilized in meter realizes the automatic recycling of paraffin cleaner；Again, this kind of retracting device may be implemented in
In the case of being not related to pump, paraffin cleaner is launched and is recycled, improved work efficiency, greatly reduces working strength and production
Cost.
Description of the drawings：
Fig. 1 is longitudinal sectional structure chart that fluid power paraffin cleaner launches retracting device；
Fig. 2 is appearance graphics of the present invention；
Fig. 3 is slip pipe orbit plane expanded view of the present invention；
Fig. 4 is slip pipe slip ring structure schematic diagram of the present invention；
Fig. 5 is jack structural schematic diagram of the present invention.
1- cylinder barrels；2 first stage piston bars；3- second piston rods；4- fastening bolts；5- hydraulic cylinder flanges；6- first is nonmetallic
Gasket；7- level-one folding and unfolding drum flanges；8- gaskets；9- nuts；10- level-one folding and unfolding cylinders；11- slip pipes；12- upper flanges；13- second is non-
Metal gasket 14- lower flanges；15- two level folding and unfolding cylinders；16- wellhead flanges；17- sealing rings；The sides 18- bolt；19- compressed springs；
20- steel balls；21- slip rings；22- track pins, 23- third guide surfaces, the 4th guide surfaces of 24-, 25 first guide surfaces, 26- second are led
To face.
Specific implementation mode：
The invention will be further described below in conjunction with the accompanying drawings：
Shown in Fig. 1 to Fig. 5, this kind of rodless pump fluid power paraffin cleaner well head launches retracting device, including telescopic hydraulic cylinder, level-one are received
Cylinder 10 and two level folding and unfolding cylinder 15 are put, is unique in that：
The telescopic hydraulic cylinder is double acting two-stage telescopic cylinder, and oil inlet and outlet has level-one in cylinder barrel 1, the telescopic hydraulic cylinder
Piston rod 2 and second piston rod 3, the cylinder barrel are flange form cylinder barrel, and are integral type.
The upper end of level-one folding and unfolding cylinder 10 is connected with level-one folding and unfolding drum flange 7 by welding；Under level-one folding and unfolding cylinder 10
End is connected with upper flange 12 by welding；The upper end of two level folding and unfolding cylinder 15 by welding with 14 phase of lower flange
Connection, the lower end of two level folding and unfolding cylinder 15 is connected with wellhead flange 16 by welding；The ring flange of hydraulic cylinder flange with
Between level-one folding and unfolding drum flange 7, the first non-metallic gasket 6 is placed, is locked by fastening bolt 4 and nut 9.
On the ring flange of lower flange 14, it is radially provided with the tapped through-hole of at least four, the through-hole is evenly distributed on
On ring flange, the point of the center line of the through-hole is located on the ring flange center line of lower flange 14；By inner in the through-hole
And it is equipped with steel ball 20, compressed spring 19, sealing ring 17 and side bolt 18 successively outside, side bolt 18 is connected with the through-hole by screw thread
It connects；The top of side bolt 18 is touched with compressed spring 19, to realize the compression to compressed spring 19；The inner curve of the through-hole
For arc, so that the part that steel ball 20 stretches out the through-hole is less than half.
It further includes slip pipe 11 and slip ring 21 to state device；The upper rail and lower railway being recessed inwardly are provided on slip pipe 11；It is described
Upper rail by three crown angles it is identical fall sawtooth connected by arc transition after constitute, three circular arcs are to be located above
Three stationary points position, the included angle formed between the first guide surface 25 and the second guide surface 26 of the crown of falling sawtooth is less than
60 degree；The lower railway passes sequentially through the first vertical slots a, the second vertical slots b and by the identical positive sawtooth of three crown angles
It is constituted after three vertical slots c connections, wherein the second vertical slots b is identical with the depth of third vertical slots c, and the first vertical slots are longer than separately
The depth of outer two vertical slots；Constitute the included angle between the third guide surface 23 and the 4th guide surface 24 of the positive sawtooth crown
Equal to 60 degree, each of the upper rail falls sawtooth and corresponds to vertical slots of the lower railway in the axial direction, but described in passing through
The slip pipe axial slices for the crown of falling sawtooth and the slip pipe axial slices for passing through the vertical slots center line are misaligned；It is described upper rail and
Planar development figure of the lower railway on slip pipe 11 is closed figures；Slip ring 21 is fixed in the inner cylinder of upper flange 12, slip ring
The pin hole being inserted into for track pin 22 is provided on 21；Slip ring 21 is placed on the outer wall of slip pipe 11, and track pin 22 is placed in across slip ring 21
In the track of slip pipe 11.
Generally, this kind of paraffin cleaner is launched is as general as two-part structure up and down with retracting device, and top is divided into flexible
Hydraulic cylinder, function are to promote fluid power paraffin cleaner downlink, make it through spring catch and pass through at head valve.Utilize underground
Fluid pressure pushes piston rod downlink, hydraulic cylinder to be connected with the paraffin cleaner retracting device of lower section by flange.Lower part is clear
Wax device recovery unit, is mainly made of folding and unfolding cylinder, slip pipe, slip ring, spring catch etc..Track pin 22 is placed in slip pipe 11 across slip ring 21
At the positions track a, it is illustrated in figure 3 slip pipe slip ring structure schematic diagram.Due to the rail that slip pipe deployed configuration is two kinds of different lengths
Road, under the action of fluid power paraffin cleaner, slip pipe can move up and down, and slip ring is carried out by lower section lower flange 14 and level-one folding and unfolding cylinder 10
Fixed, level-one folding and unfolding cylinder is connected by the connection type of welding with upper flange 12, and upper flange is connected by bolt with lower flange, under
Flange is connected by the connection type of welding with two level folding and unfolding cylinder 15, the connection type and uphole method that two level folding and unfolding cylinder passes through welding
Orchid 16 is connected.Wellhead flange is connected by bolt with production tree wax removal valve upper flange.Spring latch structure by lower flange, steel ball,
Compressed spring, sealing ring, side bolt composition, steel ball 20, compressed spring 19, sealing ring 17, side bolt 18 are sequentially arranged at down
In flange 14, side bolt is attached with laxative remedy your beautiful writings by screw thread.Spring catch is used in initial and paraffin cleaner third time wax removal
After block paraffin cleaner.
Fluid power paraffin cleaner is launched as follows with the course of work of retracting device：First fluid power paraffin cleaner is hung on spring catch, by
The steel ball of stretching tangles fluid power paraffin cleaner, and slip pipe is headed on above paraffin cleaner, and track pin is sliding at the positions slip pipe long track a at this time
There is corresponding track in pipe outer wall, be illustrated in figure 3 orbit plane expanded view, slip pipe deployed configuration includes two kinds of different lengths
The length of track, two short tracks, a long track, middle orbit is determined by fluid power paraffin cleaner fishing head.Top is three and stays
Point position, when it is implemented, the angle between two guide surfaces 25,26 is 52 °, the angle between guide surface 23,24 is 60 °.According to
The track size designed can just control the climb of paraffin cleaner each time, to achieve the effect that three-level wax removal.It is sliding
Track pin between ring and slip pipe is run along track.Slip ring is motionless, and slip pipe moves up and down.Telescopic hydraulic cylinder pushes fluid power wax removal
Device downlink, steel ball are retracted, and spring is compressed, fluid power paraffin cleaner downlink, and slip pipe follows paraffin cleaner downward under Gravitative Loads at this time
Movement, track pin are slid into position d via long track, are tangled at this time by track pin due to slip pipe, slip pipe is not followed by under paraffin cleaner
Row, fluid power paraffin cleaner, which enters, carries out wax removal work in well, telescopic hydraulic cylinder is withdrawn.At the end of level-one wax removal, paraffin cleaner is in oil
Automatic uplink under the action of well casing column inner fluid encounters to push after slip pipe and go thereon, at this time track pin by position d along guide surface 23
It slides at the positions short track b, due to paraffin cleaner own structural characteristics, paraffin cleaner continues to move downward, and carries out two level wax removal work,
As motion conditions work with above-mentioned completion level-one wax removal when completing the work of two level wax removal.When completing the work of three-level wax removal,
During uplink, track pin slides back to position a along track, and fluid power paraffin cleaner can rise higher height, is more than spring catch, again
It is tangled by spring catch, completes the recycling of fluid power paraffin cleaner.
Claims (1)
1. a kind of rodless pump fluid power paraffin cleaner well head launches retracting device, including telescopic hydraulic cylinder, level-one folding and unfolding cylinder and two level
Folding and unfolding cylinder, it is characterised in that：
The telescopic hydraulic cylinder is double acting two-stage telescopic cylinder, and oil inlet and outlet has level-one in cylinder barrel, the telescopic hydraulic cylinder
Piston rod and second piston rod, the cylinder barrel are flange form cylinder barrel, and are integral type；
The upper end of level-one folding and unfolding cylinder is connected with level-one folding and unfolding drum flange by welding；The lower end of level-one folding and unfolding cylinder passes through
The mode of welding is connected with upper flange；The upper end of two level folding and unfolding cylinder is connected with lower flange by welding, and two level is received
The lower end for putting cylinder is connected with wellhead flange by welding；The ring flange of hydraulic cylinder flange and level-one folding and unfolding drum flange it
Between, the first non-metallic gasket is placed, fastening bolt and nut check are passed through；
On the ring flange of lower flange, it is radially provided with the tapped through-hole of at least four, the through-hole is evenly distributed on ring flange
On, the point of the center line of the through-hole is located on the ring flange center line of lower flange；In the through-hole from inside and outside successively
It is equipped with steel ball, compressed spring, sealing ring and side bolt, side bolt is connected through a screw thread with the through-hole；The top of side bolt with
Compressed spring touches, to realize the compression to compressed spring；The inner curve of the through-hole is arc, so that steel ball stretches out institute
The part for stating through-hole is less than half；
Described device further includes slip pipe and slip ring；The upper rail and lower railway being recessed inwardly are provided on slip pipe；It is described upper rail by
The identical sawtooth of three crown angles is constituted after being connected by arc transition, and three circular arcs are that three be located above stay
Point position, the included angle formed between the first guide surface and the second guide surface of the crown of falling sawtooth are less than 60 degree；Under described
After track passes sequentially through the first vertical slots by the identical positive sawtooth of three crown angles, the second vertical slots are connected with third vertical slots
It constitutes, wherein the second vertical slots are identical with the depth of third vertical slots, and the first vertical slots are longer than the depth of other two vertical slots
Degree；The included angle constituted between the third guide surface and the 4th guide surface of the positive sawtooth crown is equal to 60 degree, the upper rail
Each of fall sawtooth and correspond to vertical slots of the lower railway in the axial direction, but by the slip pipe axial direction of the crown of falling sawtooth
Section and the slip pipe axial slices for passing through the vertical slots center line are misaligned；The upper rail and plane of the lower railway on slip pipe
Displaypattern is closed figures；Slip ring is fixed in the inner cylinder of upper flange, and the pin hole being inserted into for track pin is provided on slip ring；It is sliding
It is located on the outer wall of slip pipe, track pin is placed in across slip ring in the track of slip pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384728.7A CN108412444B (en) | 2018-04-26 | 2018-04-26 | Wellhead throwing and recycling device of hydraulic paraffin cleaner of rodless pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384728.7A CN108412444B (en) | 2018-04-26 | 2018-04-26 | Wellhead throwing and recycling device of hydraulic paraffin cleaner of rodless pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108412444A true CN108412444A (en) | 2018-08-17 |
| CN108412444B CN108412444B (en) | 2023-05-12 |
Family
ID=63136814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810384728.7A Active CN108412444B (en) | 2018-04-26 | 2018-04-26 | Wellhead throwing and recycling device of hydraulic paraffin cleaner of rodless pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108412444B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382430A (en) * | 2021-11-26 | 2022-04-22 | 中国石油天然气股份有限公司 | Oil recovery downhole tool releaser |
| CN114687689A (en) * | 2022-04-21 | 2022-07-01 | 西南石油大学 | Recoverable bridging plug dropping tool |
| CN116927722A (en) * | 2023-08-05 | 2023-10-24 | 东北石油大学 | Oil pipe paraffin removal and descaling method and assembly and device for implementing same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2203776A (en) * | 1987-04-10 | 1988-10-26 | Otis Eng Co | Pressure actuated cleaning tool |
| US6065541A (en) * | 1997-03-14 | 2000-05-23 | Ezi-Flow International Limited | Cleaning device |
| CN103306640A (en) * | 2013-07-04 | 2013-09-18 | 东北石油大学 | Fluid power paraffin removal device of rodless pump oil recovery system |
| CN206220931U (en) * | 2016-10-27 | 2017-06-06 | 中国石油天然气股份有限公司 | Mechanical paraffin removal device for rodless oil production well |
-
2018
- 2018-04-26 CN CN201810384728.7A patent/CN108412444B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2203776A (en) * | 1987-04-10 | 1988-10-26 | Otis Eng Co | Pressure actuated cleaning tool |
| US4799554A (en) * | 1987-04-10 | 1989-01-24 | Otis Engineering Corporation | Pressure actuated cleaning tool |
| US6065541A (en) * | 1997-03-14 | 2000-05-23 | Ezi-Flow International Limited | Cleaning device |
| CN103306640A (en) * | 2013-07-04 | 2013-09-18 | 东北石油大学 | Fluid power paraffin removal device of rodless pump oil recovery system |
| CN206220931U (en) * | 2016-10-27 | 2017-06-06 | 中国石油天然气股份有限公司 | Mechanical paraffin removal device for rodless oil production well |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382430A (en) * | 2021-11-26 | 2022-04-22 | 中国石油天然气股份有限公司 | Oil recovery downhole tool releaser |
| CN114382430B (en) * | 2021-11-26 | 2023-08-22 | 中国石油天然气股份有限公司 | Downhole tool releaser for oil extraction |
| CN114687689A (en) * | 2022-04-21 | 2022-07-01 | 西南石油大学 | Recoverable bridging plug dropping tool |
| CN116927722A (en) * | 2023-08-05 | 2023-10-24 | 东北石油大学 | Oil pipe paraffin removal and descaling method and assembly and device for implementing same |
| CN116927722B (en) * | 2023-08-05 | 2024-05-10 | 东北石油大学 | Oil pipe paraffin removal and descaling method and assembly and device for implementing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108412444B (en) | 2023-05-12 |
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