CN105863573B - A kind of self-lubricating paraffin antiscale flow string - Google Patents
A kind of self-lubricating paraffin antiscale flow string Download PDFInfo
- Publication number
- CN105863573B CN105863573B CN201610367415.1A CN201610367415A CN105863573B CN 105863573 B CN105863573 B CN 105863573B CN 201610367415 A CN201610367415 A CN 201610367415A CN 105863573 B CN105863573 B CN 105863573B
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- self
- oil
- lubricating
- oil pipe
- sucker rod
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- 239000012188 paraffin wax Substances 0.000 title claims abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 69
- 239000010687 lubricating oil Substances 0.000 claims abstract description 33
- 239000003129 oil well Substances 0.000 claims abstract description 26
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 239000011572 manganese Substances 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000001993 wax Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000010779 crude oil Substances 0.000 abstract description 7
- 238000005086 pumping Methods 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000008021 deposition Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 241001463139 Vitta Species 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The present invention provides a kind of self-lubricating paraffin antiscale flow strings, box cupling including oil pipe, oil pipe thread, the more sucker rods in oil pipe and adjacent two sucker rods of connection, the first sucker rod is connect with polished rod, last root sucker rod is connect with oil well pump, the oil pipe and oil pipe thread endosexine have self-lubricating oil film, and the sucker rod and box cupling outer surface have self-lubricating oil film.This self-lubricating paraffin antiscale flow string provided by the invention, so that wax and dirty matter can not adhere to adhesion on tube rod surface, existing flow string is solved in pumping process, the wax component in crude oil is easy to be precipitated from crude oil and condense in tubing wall and increase load；Or since water flooding and injection water are incompatible, oil well tube rod pumps fouling, and beam hanger is caused to break, pump valve failure, influences the problem of oil well normally produces.
Description
Technical field
The invention belongs to technical field of petroleum extraction, and in particular to a kind of self-lubricating paraffin antiscale flow string.
Background technology
The flow string of oil well, water injection well, gas recovery well at present, the complexity due to flow string and deep-well next week
And the long-term reciprocating motion renewed, cause abrasion and product fluid, the chemically unstable for injecting liquid of beam hanger and oil pipe
Property, in addition CO2, sulfate reducing bacteria effect, cause the inside and outside corrosion of most of oil, tubular column of water well, while China has developed
Oil field in occur the problems such as wax deposition, fouling on a large scale, the easy fouling of universal flow string, wax deposition, oil well is once fouling
It can seriously affect production, snaking complex procedures and be easy to damage rod tube ontology, influence equipment life.Simultaneously because oil pumping
Bar is disconnected, oil well pump valve Its Failures, drastically influences the normal production of oil, gas and water well.
In oilfield, wax control, antiscaling method have chemistry, the methods of machinery and electromagnetism, sound wave.But due to pit shaft ring
Border is complicated, and the crude oil chemical constituent of different geology blocks is different, and chemical method has a limitation, and the methods of machinery, electromagnetism, sound wave
It is deposited in the wellbore in the form of a kind of underground attachment, is damaged in use, due to equipment damage or other be possible to influence
Normal production.
The flow string for carrying out preservative treatment using common paint now cannot be satisfied wax control, antiscale, heatproof, anti-oxidant
Requirement, coating tubing is by applying one layer of solidification rear surface is smooth and hydrophily is strong substance in tube inner wall, and new oil pipe makes
It is preferable with effect, but coating tubing is not wear-resisting, but after a period of use wax control, dirt effect are lost since coating performance changes
Fruit.
And some disclosure satisfy that the measure of requirement, such as using the methods of centralizer, Ceramic Lined Pipes Made, be tested by actual production
Card, and certain negative effect is produced, such as increase tubing string weight, change string size.And glass inner-lining oil pipe is used,
It is by one layer of glass lining of oil tube inner lining, having hydrophilic and oleophobic, surface smooth, preventing the effect of wax, dirt deposition, but this
Oil pipe not impact resistance, transport preserves and lower oil tube requirement condition is harsh, and when use is easily damaged, and is not achieved and prolongs the service life
Purpose.
Invention content
Present invention aim to address existing flow strings in pumping process, due to stratum and temperature in wellbore difference,
Wax component in crude oil is easy to be precipitated from crude oil and condense in tubing wall and increase load；Or due to water flooding and injection
Water is incompatible, and oil well tube rod pumps fouling, influences oil well and normally produces, and overcomes in the prior art that coating tubing is not wear-resisting, liner
The problem of glass oil pipe not impact resistance, to extend tube rod service life and production time efficiency.
For this purpose, the present invention provides a kind of self-lubricating paraffin antiscale flow string, including oil pipe, oil pipe thread, it is set to oil
The box cupling of more sucker rods and adjacent two sucker rods of connection in pipe, the first sucker rod are connect with polished rod, and last root is taken out
Beam hanger is connect with oil well pump, and the oil pipe and oil pipe thread endosexine have a self-lubricating oil film, outside the sucker rod and box cupling
Has self-lubricating oil film in surface.
The length of the oil pipe and sucker rod with self-lubricating oil film is from well head at least 500 meters of underground.
It is described with the oil pipe of self-lubricating oil film and the length of sucker rod from oil well pump to oil well pump top at least 500 meters.
The self-lubricating oil film is by spraying or being plated on oil pipe, oil pipe thread, sucker rod and box cupling.
Gloss oil 31%, silicone oil 10%, amine-oxides 6%, zirconium oxide 6%, polyurethanes 23%, isopropanol 16% and high manganese close
Gold 8% forms.
The oil pipe and sucker rod surface roughness Ra ＞ 3.2, friction coefficient 0.03- with self-lubricating oil film
0.04, impact resistance 50kgcm, the self-lubricating oil film adhesive force are 1 grade.
, the self-lubricating oil film high temperature resistance is more than or equal to 100 DEG C.
The beneficial effects of the invention are as follows：
This self-lubricating paraffin antiscale flow string provided by the invention so that wax and dirty matter can not adhere on tube rod surface
Adhesion solves existing flow string in pumping process, and the wax component in crude oil is easy to be precipitated and condense from crude oil
Increase load in tubing wall；Or since water flooding and injection water are incompatible, oil well tube rod pumps fouling, causes beam hanger to break, pump
Valve failure, influences the problem of oil well normally produces.
Compared with prior art, it has the characteristics that：
1, in sucker rod in pumping unit up-down stroke operational process, the oil pipe thread crossed with inner surface treatment is not broken off a friendship
It is wrong so that inside pit shaft, oil pipe, sucker rod all round process are without wax, dirt attachment.
2, self-lubricating oil film improves coating abrasion performance and smoothness, has reached wax-proof anti-scaling, extends the mesh of pump detection period
's；
3, optimization use coated pipe post structure locations, reduce Meteorological, reduce workover cost, double down comparison, reduce at
This, increases benefit.
It is described in further details below in conjunction with attached drawing.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is sucker rod structural schematic diagram；
Fig. 3 is vitta structure schematic diagram.
In figure：1, oil pipe；2, sucker rod；3, casing；4, tubing centrilizer；5, wiper block；6, oil well pump；7, floral tube；8、
Plug；9, box cupling；10, oil pipe thread.
Specific implementation mode
Embodiment 1：
Present embodiments provide a kind of self-lubricating paraffin antiscale flow string as shown in Figure 1, Figure 2, Figure 3 shows, including oil pipe
1, the box cupling 9 of oil pipe thread 10, the more sucker rods 2 in oil pipe 1 and adjacent two sucker rods 2 of connection, described first
Sucker rod 2 is connect with polished rod, and last root sucker rod 2 is connect with oil well pump 6, and the oil pipe 1 and 10 endosexine of oil pipe thread have
Self-lubricating oil film, the sucker rod 2 and 9 outer surface of box cupling have self-lubricating oil film.
As shown in Figure 1, being oil pipe 1 in production string 3, connected by oil pipe thread 10 between oil pipe 1 and oil pipe 1, oil pipe 1
Interior is sucker rod 2, is connected by box cupling 9 between two sucker rods 2, has wiper block 5 on sucker rod 2, there is oil pipe righting on oil pipe 1
Device 4, last 2 lower end of root sucker rod are sequentially connected oil well pump 6, floral tube 7 and plug 8 from top to bottom.
1 column surface flatness of this production pipe is high, and wax and dirty matter are not easy to condense, be attached to inside and outside tube rod on wall surface, thorough
Bottom prevents to solve the problems, such as oil well pipe wax deposition dirt, extends pump detection period.
Embodiment 2：
On the basis of embodiment 1, it is described with the oil pipe 1 of self-lubricating oil film and the length of sucker rod 2 from well head to well
Under at least 500 meters；The length of the oil pipe 1 and sucker rod 2 with self-lubricating oil film from oil well pump 6 to oil well pump 6 top to
It is 500 meters few.
Since the serious position of wax deposition is 500 meters below well head, the serious sometimes full well section fouling of fouling, the general fouling of oil well
Upper 500 meters of inner oil tubes, 1 bar surface is being pumped, fouling thickness is in 3mm or so or pump barrel fouling when serious.Oil well is once fouling
It can seriously affect production, snaking complex procedures and be easy to damage rod tube ontology, influence equipment life.
Self-lubricating oil film is by spraying or being plated on oil pipe 1, oil pipe thread 10, sucker rod 2 and box cupling 9.By self-lubricating
After oil film processing, index is had the following performance：
Surface roughness：Ra ＞ 3.2, friction coefficient：0.03-0.04,
Coating adhesion：1 grade, impact resistance：50kg.cm,
Load-carrying properties：＞ 12KN, high temperature resistance：≥100℃.
Self-lubricating oil film in the present embodiment by following mass percent material composition：Gloss oil 31%, silicone oil 10%, oxidation
Ammonium 6%, zirconium oxide 6%, polyurethanes 23%, isopropanol 16% and high manganese 8% form.
The self-lubricating oil film preparation process：
At room temperature, the gloss oil of formula ratio is dissolved in the polyurethanes and isopropanol of formula ratio first, is stirred evenly
30 minutes；The silicone oil, zirconium oxide, amine-oxides of formula ratio are sequentially added, mixing is abundant, then rear that high violent alloy is added, and continues
It stirs to it and is uniformly distributed.Wherein, gloss oil is coating primary raw material, silicone oil for reducing the friction between mill material because
Number, improves the smoothness of coating；Polyurethanes and isopropanol are for improving coating thermosetting property, thermoplasticity；Amine-oxides, oxidation
Zirconium effect is to improve corrosion resistance；High manganese effect is to improve coating toughness, wearability.
Self-lubricating oil film is uniformly distributed each ingredient in the way of mechanical blending, electromagentic resonance is finally utilized, in Gao He
Hereby under vibration frequency, so that self-lubricating oil film is steadily distributed in oil pipe 1,2 surface of sucker rod, be then dried at room temperature for, obtain institute
Need self-lubricating oil film.Self-lubricating oil film so that column surface smoothness is high, and wax and dirty matter are not easy to condense, be attached to inside and outside tube rod
On wall surface, thoroughly prevents to solve the problems, such as oil well pipe wax deposition dirt, extend pump detection period.
Self-lubricating oil film is sprayed or is plated in 2 box cupling of sucker rod, 9 outer surface, in oil pipe thread 10 by the present invention by interior
Surface；Tripping in design position；In sucker rod 2 with the pipe wire in pumping unit up-down stroke operational process, crossed with inner surface treatment
Button 10 is constantly staggeredly so that inside pit shaft, oil pipe 1,2 all round process of sucker rod are without wax, dirt attachment.
In conclusion compared with prior art, the present invention having the characteristics that：
1, continuous with the oil pipe thread 10 in pumping unit up-down stroke operational process, crossed with inner surface treatment in sucker rod 2
Staggeredly so that inside pit shaft, oil pipe 1,2 all round process of sucker rod ensure that oil well normally produces, prolong without wax, dirt attachment adhesion
Long tube rod service life and production time efficiency.
2, self-lubricating oil film improves coating abrasion performance and smoothness, has reached wax-proof anti-scaling, extends the mesh of pump detection period
's；
3, optimization use coated pipe post structure locations, reduce Meteorological, reduce workover cost, double down comparison, reduce at
This, increases benefit.
The well-known components and common structure of component and the structure category industry that the present embodiment does not describe in detail, differ here
One narration.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
Be with the present invention it is same or analogous design all belong to the scope of protection of the present invention within.
Claims (5)
1. a kind of self-lubricating paraffin antiscale flow string, it is characterised in that：Including oil pipe（1）, oil pipe thread（10）, be set to oil pipe
（1）More interior sucker rods（2）And adjacent two sucker rods of connection（2）Box cupling（9）, the first sucker rod（2）With light
Bar connects, last root sucker rod（2）With oil well pump（6）Connection, the sucker rod（2）On have wiper block（5）, the oil pipe（1）With
Oil pipe thread（10）Have self-lubricating oil film, the sucker rod in endosexine（2）And box cupling（9）Has self-lubricating oil in outer surface
Film；
With the oil pipe of self-lubricating oil film（1）And sucker rod（2）Length from well head at least 500 meters of underground, have self-lubricating
The oil pipe of oil film（1）And sucker rod（2）Length from oil well pump（6）To oil well pump（6）At least 500 meters of top；
The self-lubricating oil film by following mass percent material composition：Gloss oil 31%, silicone oil 10%, amine-oxides 6%, zirconium oxide
6%, polyurethanes 23%, isopropanol 16% and high manganese 8% form.
2. a kind of self-lubricating paraffin antiscale flow string according to claim 1, it is characterised in that：The self-lubricating oil film
By spraying or being plated in oil pipe（1）, oil pipe thread（10）, sucker rod（2）And box cupling（9）On.
3. a kind of self-lubricating paraffin antiscale flow string according to claim 1, it is characterised in that：The self-lubricating oil film
Thickness is 200 μm.
4. according to a kind of self-lubricating paraffin antiscale flow string of claim 1-3 any one of them, it is characterised in that：It is described attached
There is the oil pipe of self-lubricating oil film（1）And sucker rod（2）Surface roughness Ra ＞ 3.2, friction coefficient 0.03-0.04, impact resistance
Performance is 50kgcm, and self-lubricating oil film adhesive force is 1 grade.
5. according to a kind of self-lubricating paraffin antiscale flow string of claim 1-3 any one of them, it is characterised in that：It is described from
Lubricating oil film high temperature resistance is more than or equal to 100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610367415.1A CN105863573B (en) | 2016-05-30 | 2016-05-30 | A kind of self-lubricating paraffin antiscale flow string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610367415.1A CN105863573B (en) | 2016-05-30 | 2016-05-30 | A kind of self-lubricating paraffin antiscale flow string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863573A CN105863573A (en) | 2016-08-17 |
| CN105863573B true CN105863573B (en) | 2018-07-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610367415.1A Active CN105863573B (en) | 2016-05-30 | 2016-05-30 | A kind of self-lubricating paraffin antiscale flow string |
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| CN (1) | CN105863573B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194047A (en) * | 2016-08-22 | 2016-12-07 | 中国石油天然气股份有限公司 | A kind of rod collar |
| CN108590545A (en) * | 2018-05-30 | 2018-09-28 | 中国石油天然气股份有限公司 | A kind of abrasion resistant corrosion resistant wax-proof anti-scaling type sucker rod and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786270Y (en) * | 2004-11-11 | 2006-06-07 | 康玉波 | Self-lubricating paraffin control wearable sucker rod assembly |
| CN101581293A (en) * | 2009-05-27 | 2009-11-18 | 中国石油天然气股份有限公司 | Self-lubricating string for rod and tubing wear prevention and sucker rod pumping of inclined wells |
| CN202659218U (en) * | 2012-06-26 | 2013-01-09 | 刘庆敏 | Oil lubrication oil-pumping device |
| RU2539459C1 (en) * | 2013-10-15 | 2015-01-20 | Закрытое акционерное общество "ЭЛКАМ-нефтемаш" | Oil-well sucker-rod pumping unit |
| CN205172464U (en) * | 2015-11-07 | 2016-04-20 | 李珂 | Oil pipe post is taken out to self -lubricating sucker rod abrasionproof |
-
2016
- 2016-05-30 CN CN201610367415.1A patent/CN105863573B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786270Y (en) * | 2004-11-11 | 2006-06-07 | 康玉波 | Self-lubricating paraffin control wearable sucker rod assembly |
| CN101581293A (en) * | 2009-05-27 | 2009-11-18 | 中国石油天然气股份有限公司 | Self-lubricating string for rod and tubing wear prevention and sucker rod pumping of inclined wells |
| CN202659218U (en) * | 2012-06-26 | 2013-01-09 | 刘庆敏 | Oil lubrication oil-pumping device |
| RU2539459C1 (en) * | 2013-10-15 | 2015-01-20 | Закрытое акционерное общество "ЭЛКАМ-нефтемаш" | Oil-well sucker-rod pumping unit |
| CN205172464U (en) * | 2015-11-07 | 2016-04-20 | 李珂 | Oil pipe post is taken out to self -lubricating sucker rod abrasionproof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863573A (en) | 2016-08-17 |
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