CN104499996B - Hydraulic working vehicle for oil well - Google Patents
Hydraulic working vehicle for oil well Download PDFInfo
- Publication number
- CN104499996B CN104499996B CN201410804627.2A CN201410804627A CN104499996B CN 104499996 B CN104499996 B CN 104499996B CN 201410804627 A CN201410804627 A CN 201410804627A CN 104499996 B CN104499996 B CN 104499996B
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- Prior art keywords
- hydraulic
- oil well
- cylinder
- power
- piston cylinder
- Prior art date
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- 239000003129 oil well Substances 0.000 title claims abstract description 38
- 239000010720 hydraulic oil Substances 0.000 claims description 32
- 230000008859 change Effects 0.000 claims description 14
- 239000003921 oil Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 239000007788 liquid Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000013011 mating Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002699 waste material Substances 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to the hydraulic technology field of oilfield and relates to a hydraulic working vehicle for an oil well. The hydraulic working vehicle for the oil well comprises a vehicle body, the vehicle body is provided with a medicine chest, a high-pressure pipe coil, a hydraulic workstation, a hydraulic wrench, a high-pressure water gun and a hydraulic motor, the medicine chest is connected with the high-pressure pipe coil through a power hydraulic cylinder, and the hydraulic workstation is respectively communicated with the hydraulic wrench, high-pressure water gun, hydraulic motor and power hydraulic cylinder to control them. The hydraulic working vehicle for the oil well uses the vehicle as power and uses the hydraulic workstation to perform different function extensions, such as hydraulic dosing pump, hydraulic motor, hydraulic wrench, high-pressure water gun and the like, and daily maintenance can be conveniently carried out on equipment. The hydraulic working vehicle for the oil well is easy to process and manufacture, low in cost, and convenient and quick to run, the labor intensity of the staff can be greatly reduced, the safety risk is lowered, the working efficiency is improved, and the large-scale popularization can be realized.
Description
Technical field
The invention belongs to oil field hydraulic technical field, it is related to a kind of oil well hydraulic pressure Operation Van.
Background technology
Oil field region is wide, and external environment condition compares evil slightly, and the instrument of oil well site configuration is simpler and cruder, and many work do not have
Easily tool operation, and there is potential safety hazard, such as:
1st, the problems such as oilfield generally existing wax deposition, fouling, corrosion, the normal production of oil well, oil supply well are had a strong impact on
Production management bring great difficulty, therefore, it is necessary to periodically carry out dosing to oil well, but oil well dosing at this stage is mainly
Well group employee is relied on manually to operate, workload is big, inefficiency also has potential safety hazard.
2nd, oil field equipment runs well is the normal important leverage producing of oil well, and therefore oil well rig will ensure daily dimension
Shield, marks closely screw or changes ring flange, also want routine cleaning oil pumper, these routine works seem simple, but with common
Instrument, waste time and energy, also there is potential safety hazard.
Content of the invention
The purpose of the present invention is for above problems, develops one kind and can conveniently complete regular maintenance
The device of work.
For this reason, the invention provides a kind of oil well hydraulic pressure Operation Van, including the change speed gear box in car body and car body, described car body
On oil well hydraulic system is installed, this oil well hydraulic system includes medicine-chest, high pressure coil pipe, hydraulic workstation, hydraulic spanner, high pressure
Hydraulic giant and hydraulic motor, described medicine-chest is connected with high pressure coil pipe by power hydraulic cylinder, and described hydraulic workstation connects respectively
Logical control hydraulic spanner, giant, hydraulic motor, power hydraulic cylinder.
Power takeoff is provided with the change speed gear box in described car body, it is dynamic to hydraulic workstation offer that change speed gear box passes through power takeoff
Power.
Described hydraulic workstation includes hydraulic pump, hydraulic oil container and the solenoid valve block providing hydraulic coupling,
Hydraulic pump provides power by the power takeoff installed on change speed gear box, and hydraulic oil container provides the confession of whole oil well hydraulic system
Oil and oil return；
Solenoid valve block includes the first two-position four-way solenoid valve of control giant, controls the two or two of power hydraulic cylinder
Four way solenoid valve, the first three position four-way electromagnetic valve controlling hydraulic motor and the second 3-position 4-way electromagnetism controlling hydraulic spanner
Valve.
Described power hydraulic cylinder is made up of a double acting hydraulic cylinder and a piston cylinder, the piston of double acting hydraulic cylinder
The piston rod of bar and piston cylinder is connected as a single entity；
The both sides of the piston of double acting hydraulic cylinder are respectively arranged with opening, and the external pipeline of opening passes through the first two-position four-way
Connect with hydraulic pump and hydraulic oil container respectively after electromagnetic valve；
Inlet and outlet is had on piston cylinder, piston cylinder is connected with medicine-chest by import, piston cylinder passes through outlet and high pressure
Coil pipe connects.
It is provided with check valve, this check valve one-way conduction is from medicine in the pipeline connecting between described piston cylinder and medicine-chest
Case is to piston cylinder；
It is provided with check valve, this check valve one-way conduction is in the pipeline connecting between described piston cylinder and high pressure coil pipe
From piston cylinder to high pressure coil pipe.
Described hydraulic motor forms loop with hydraulic pump and hydraulic oil container after first three position four-way electromagnetic valve.
Described hydraulic spanner is connected with booster pump, booster pump after second three position four-way electromagnetic valve with hydraulic pump
Form loop with hydraulic oil container.
Described giant forms loop with hydraulic pump and hydraulic oil container after second two-position four-way solenoid valve.
Beneficial effects of the present invention:
1st, using vehicle as power, various functions extension, such as hydraulic pressure dosing pump, hydraulic pressure can be carried out using hydraulic workstation
Motor, hydraulic spanner and giant etc. are in that context it may be convenient to carry out regular maintenance to equipment.
2nd, all can use on each elephant enterprise oil production field, the oil well hydraulic pressure Operation Van making of this principle, very
The routine work of suitable well site and the needs of equipment regular maintenance.
3rd, the processing and manufacturing of oil well hydraulic pressure Operation Van is simple, low cost, runs convenient, fast, the work that can mitigate employee is strong
Degree, reduces security risk, improves work efficiency, can popularization and application on a large scale.
Below with reference to accompanying drawing, the present invention is described in further details.
Brief description
Fig. 1 is oil well hydraulic pressure Operation Van lateral plan.
Fig. 2 is oil well hydraulic pressure Operation Van back view.
Fig. 3 is fundamental diagram of the present invention.
Description of reference numerals: 1, medicine-chest；2nd, high pressure coil pipe；3rd, hydraulic workstation；4th, hydraulic spanner；5th, giant；6、
Hydraulic motor；7th, power hydraulic cylinder；8th, hydraulic pump；9th, double acting hydraulic cylinder；10th, piston cylinder；11st, booster pump；12nd, the one or two
Four way solenoid valve；13rd, the second two-position four-way solenoid valve；14th, the first three position four-way electromagnetic valve；15th, the second three position four-way electromagnetic valve.
Specific embodiment
Embodiment 1:
The present embodiment provides a kind of oil well hydraulic pressure Operation Van, as shown in Figure 1, Figure 2 and Figure 3, including in car body and car body
Change speed gear box, described car body is provided with oil well hydraulic system, and this oil well hydraulic system includes medicine-chest 1, high pressure coil pipe 2, hydraulic pressure work
Make station 3, hydraulic spanner 4, giant 5 and hydraulic motor 6, described medicine-chest 1 passes through power hydraulic cylinder 7 with high pressure coil pipe 2 even
Connect, described hydraulic workstation 3 is respectively communicated with control hydraulic spanner 4, giant 5, hydraulic motor 6, power hydraulic cylinder 7.
This oil well hydraulic pressure Operation Van that the present embodiment provides, it is possible to achieve high pressure coil pipe 2 dosing given by medicine-chest 1, using height
The problems such as wax deposition of platen pipe 2 solution oil well generally existing, fouling, corrosion, control hydraulic spanner additionally by hydraulic workstation 3
4th, giant 5 or hydraulic motor 6 action, realize daily maintenance.
Embodiment 2
In the present embodiment, power takeoff is provided with the change speed gear box in car body, change speed gear box passes through power takeoff to hydraulic
Stand 3 offer power, power takeoff on change speed gear box power taking supply hydraulic workstation power structure in hydraulic power structure should
With more ripe, do not do the special instruction of structure in the present embodiment.
Using the change speed gear box in car body as the power source of hydraulic workstation 3 in the present embodiment, carried out using hydraulic workstation 3
Various actions it is achieved that integrated self-centered function so that this oil well hydraulic pressure Operation Van function in the present embodiment more
Strengthen big.
It is known that power source and mailbox are requisite in hydraulic system, the hydraulic described in the present embodiment
Stand and 3 include providing the hydraulic pump 8 of hydraulic coupling, hydraulic oil container and solenoid valve block, hydraulic pump 8 is carried by the power takeoff installed on change speed gear box
For power, hydraulic oil container provides fuel feeding and the oil return of whole oil well hydraulic system；Solenoid valve block includes controlling the of giant 5
One two-position four-way solenoid valve 12, control power hydraulic cylinder 7 the second two-position four-way solenoid valve 13, control hydraulic motor 6 first
Three position four-way electromagnetic valve 14 and the second three position four-way electromagnetic valve 15 controlling hydraulic spanner 4.
Hydraulic pump 8, as the power source of the present embodiment, forms closed circuit with hydraulic oil container, by various hydraulic implement (examples
As the hydraulic spanner 4 in the present invention, giant 5, hydraulic motor 6, power hydraulic cylinder 7) install in the loop just can achieve its
Function, the multiple independent electromagnetic valve of increase can select different electromagnetic valves according to the actual requirements, and electromagnetic valve can be adjusted respectively
The action of individual hydraulic implement.
Embodiment 3:
In the present embodiment, power hydraulic cylinder 7 is made up of a double acting hydraulic cylinder 9 and a piston cylinder 10, double acting liquid
The piston rod of the piston rod of cylinder pressure 9 and piston cylinder 10 is connected as a single entity；
The both sides of the piston of double acting hydraulic cylinder 9 are respectively arranged with opening, and the external pipeline of opening passes through the one or two four
Connect with hydraulic pump 8 and hydraulic oil container respectively after three-way electromagnetic valve 12；
Inlet and outlet is had on piston cylinder 10, piston cylinder 10 is connected with medicine-chest 1 by import, piston cylinder 10 passes through outlet
Connect with high pressure coil pipe 2.
The present embodiment is realized by procedure below, as shown in figure 3, hydraulic pump 8 provides power so that double-action hydraulic
Action about the piston of cylinder 9.
When needing dosing, the first two-position four-way solenoid valve 12 is located at right position, and hydraulic pump 8 first pumps out hydraulic oil
Enter double acting hydraulic cylinder 9 left side cavity, promote piston to move right, the hydraulic oil on the right side of piston flows back to fuel tank, now piston
The piston of cylinder 10 also moves right, and the medicinal liquid in medicine-chest 1 enters piston cylinder 10 under suction and stores, then the one or two four
Three-way electromagnetic valve 12 is converted into left position, and now hydraulic pump 8 pumps out hydraulic oil and enters double acting hydraulic cylinder 9 right side cavity, promotes and lives
Fill in left movement, the hydraulic oil on the left of piston flows back to fuel tank, now the piston of piston cylinder 10 is also to left movement, the medicine in medicine-chest 1
Liquid enters high pressure coil pipe 2 under pressure, enters oil well cleaning by high pressure coil pipe 2.
Embodiment 4:
On the basis of embodiment 3, it is provided with unidirectional in the pipeline connecting between piston cylinder 10 and medicine-chest 1 in the present embodiment
Valve, this check valve one-way conduction is to piston cylinder 10 from medicine-chest 1；
Be provided with check valve in the pipeline connecting between piston cylinder 10 and high pressure coil pipe 2, this check valve one-way conduction be from
Piston cylinder 10 arrives high pressure coil pipe 2.
The effect of check valve be fluid can only one-way movement, the hydraulic pump 8 in embodiment 3 have from medicine-chest 1 draw
Medicinal liquid and medicinal liquid pressure is entered 2 two processes of high pressure coil pipe, the check valve between piston cylinder 10 and high pressure coil pipe 2, can prevent
When drawing medicinal liquid process, medicinal liquid is sucked out from high pressure coil pipe 2, and the check valve between piston cylinder 10 and medicine-chest 1 can prevent
Medicinal liquid is entered medicine-chest 1 by pressure, and this two check valves are it is ensured that the normal operation of dosing.
Embodiment 5:
In the present embodiment, hydraulic motor 6 is formed with hydraulic pump 8 and hydraulic oil container by after the first three position four-way electromagnetic valve 14
Loop.
Hydraulic motor 6, the first three position four-way electromagnetic valve 14, hydraulic pump 8 and hydraulic oil container define the work of hydraulic motor 6
Loop, when the first three position four-way electromagnetic valve 14 is in left position, under hydraulic pump 8 and hydraulic oil container mating reaction, hydraulic pressure horse
Reach 6 to rotate forward, export power；When the first three position four-way electromagnetic valve 14 is in right position, join in hydraulic pump 8 and hydraulic oil container
Under cooperation, hydraulic motor 6 rotates backward, and exports power；When the first three position four-way electromagnetic valve 14 is in middle position, loop is not
Logical, hydraulic motor 6 is failure to actuate.
Embodiment 6:
In the present embodiment, hydraulic spanner 4 is connected with booster pump 11, after booster pump 11 passes through the second three position four-way electromagnetic valve 15
Form loop with hydraulic pump 8 and hydraulic oil container.
The work that booster pump 11, the second three position four-way electromagnetic valve 15, hydraulic pump 8 and hydraulic oil container define booster pump 11 is returned
Road, when the second three position four-way electromagnetic valve 15 is in left position, under hydraulic pump 8 and hydraulic oil container mating reaction, booster pump 11
Pressurize to hydraulic spanner 4, make hydraulic spanner 4 clamping workpiece；When the second three position four-way electromagnetic valve 15 is in right position, in hydraulic pressure
Under pump 8 and hydraulic oil container mating reaction, hydraulic spanner 4 release given by booster pump 11, makes hydraulic spanner 4 unclamp workpiece；When the two or three
, when middle position, loop is obstructed for position four-way solenoid valve 15, and booster pump 11 does not act on.
Embodiment 7:
In the present embodiment, giant 5 is formed with hydraulic pump 8 and hydraulic oil container by after the second two-position four-way solenoid valve 13
Loop.
Giant 5, the second two-position four-way solenoid valve 13, hydraulic pump 8 and hydraulic oil container define the work of giant 5
Loop, when the second two-position four-way solenoid valve 13 is in left position, under hydraulic pump 8 and hydraulic oil container mating reaction, to high pressure
Hydraulic giant 5 gradually pressurizes, and enables giant 5 to carry out operations involving high pressure；When the second two-position four-way solenoid valve 13 is in right position,
Under hydraulic pump 8 and hydraulic oil container mating reaction, to giant 5 gradually release, now giant 5 not operation.
The only illustration to the present invention exemplified as above, does not constitute the restriction to protection scope of the present invention, all
It is that same or analogous design belongs within protection scope of the present invention with the present invention.The portion of the present embodiment not narration in detail
Part and structure belong to well-known components and common structure or the conventional means of the industry, do not describe one by one here.
Claims (6)
1. a kind of oil well hydraulic pressure Operation Van, including the change speed gear box in car body and car body it is characterised in that: be provided with described car body
Oil well hydraulic system, this oil well hydraulic system include medicine-chest (1), high pressure coil pipe (2), hydraulic workstation (3), hydraulic spanner (4),
Giant (5) and hydraulic motor (6), described medicine-chest (1) is connected with high pressure coil pipe (2) by power hydraulic cylinder (7), described
Hydraulic workstation (3) be respectively communicated with control hydraulic spanner (4), giant (5), hydraulic motor (6), power hydraulic cylinder (7)；
Power takeoff is provided with the change speed gear box in described car body, it is dynamic to hydraulic workstation (3) offer that change speed gear box passes through power takeoff
Power；
Described hydraulic workstation (3) includes hydraulic pump (8), hydraulic oil container and the solenoid valve block providing hydraulic coupling, hydraulic pump (8)
There is provided power by the power takeoff installed on change speed gear box, hydraulic oil container provides fuel feeding and the oil return of whole oil well hydraulic system；Electromagnetism
Valve group includes first two-position four-way solenoid valve (12) of control giant (5), controls the two or two four of power hydraulic cylinder (7)
The two or three of three-way electromagnetic valve (13), first three position four-way electromagnetic valve (14) of control hydraulic motor (6) and control hydraulic spanner (4)
Position four-way solenoid valve (15).
2. oil well hydraulic pressure Operation Van as claimed in claim 1 it is characterised in that: described power hydraulic cylinder (7) is double by one
Acting cylinder (9) and piston cylinder (10) composition, the piston rod of the piston rod of double acting hydraulic cylinder (9) and piston cylinder (10)
It is connected as a single entity；
The both sides of the piston of double acting hydraulic cylinder (9) are respectively arranged with opening, and the external pipeline of opening passes through the first two-position four-way
Connect with hydraulic pump (8) and hydraulic oil container respectively after electromagnetic valve (12)；
Inlet and outlet is had on piston cylinder (10), piston cylinder (10) is connected with medicine-chest (1) by import, and piston cylinder (10) passes through
Outlet is connected with high pressure coil pipe (2).
3. oil well hydraulic pressure Operation Van as claimed in claim 2 it is characterised in that: described piston cylinder (10) and medicine-chest (1) it
Between connection pipeline in be provided with check valve, this check valve one-way conduction is from medicine-chest (1) to piston cylinder (10)；
It is provided with check valve, this check valve is unidirectional in the pipeline connecting between described piston cylinder (10) and high pressure coil pipe (2)
Lead to is from piston cylinder (10) to high pressure coil pipe (2).
4. the oil well hydraulic pressure Operation Van as described in claim 1 or 2 or 3 it is characterised in that: described hydraulic motor (6) passes through
First three position four-way electromagnetic valve (14) forms loop with hydraulic pump (8) and hydraulic oil container afterwards.
5. oil well hydraulic pressure Operation Van as claimed in claim 4 it is characterised in that: described hydraulic spanner (4) is connected with supercharging
Pump (11), booster pump (11) passes through the second three position four-way electromagnetic valve (15) and forms loop with hydraulic pump (8) and hydraulic oil container afterwards.
6. oil well hydraulic pressure Operation Van as claimed in claim 5 it is characterised in that: described giant (5) pass through the two or two
Position four-way solenoid valve (13) forms loop with hydraulic pump (8) and hydraulic oil container afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804627.2A CN104499996B (en) | 2014-12-23 | 2014-12-23 | Hydraulic working vehicle for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804627.2A CN104499996B (en) | 2014-12-23 | 2014-12-23 | Hydraulic working vehicle for oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104499996A CN104499996A (en) | 2015-04-08 |
| CN104499996B true CN104499996B (en) | 2017-01-25 |
Family
ID=52941436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410804627.2A Active CN104499996B (en) | 2014-12-23 | 2014-12-23 | Hydraulic working vehicle for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104499996B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577190A (en) * | 2020-04-23 | 2020-08-25 | 王水波 | Oil well foreign matter active protection type fishing equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4151597B2 (en) * | 2004-03-31 | 2008-09-17 | コベルコ建機株式会社 | Hydraulic control circuit and construction machinery |
| CN201062496Y (en) * | 2007-08-10 | 2008-05-21 | 中国石油化工股份有限公司 | Oil field well-washing manifold truck |
| CN201778766U (en) * | 2010-08-17 | 2011-03-30 | 山东陆海石油装备有限公司 | Hydraulic oil layer unblocking pump |
| CN202364706U (en) * | 2011-11-18 | 2012-08-08 | 成都盛尔嘉科技有限公司 | Medicine spraying machine for farmland |
| CN204457639U (en) * | 2014-12-23 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of oil well hydraulic pressure working vehicle |
-
2014
- 2014-12-23 CN CN201410804627.2A patent/CN104499996B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104499996A (en) | 2015-04-08 |
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