CN106437622B - Hydraulic oil pipe stain eliminating device - Google Patents
Hydraulic oil pipe stain eliminating device Download PDFInfo
- Publication number
- CN106437622B CN106437622B CN201611203672.8A CN201611203672A CN106437622B CN 106437622 B CN106437622 B CN 106437622B CN 201611203672 A CN201611203672 A CN 201611203672A CN 106437622 B CN106437622 B CN 106437622B
- Authority
- CN
- China
- Prior art keywords
- core bar
- connector
- screw thread
- main body
- scale removal
- 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.)
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Links
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 14
- 238000012856 packing Methods 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims description 28
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003129 oil well Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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)
- Crushing And Pulverization Processes (AREA)
Abstract
The present invention relates to a kind of hydraulic oil pipe stain eliminating devices, it includes fishing head (1), main body (2), core bar (3), connector (4), packing element core (5), packing element assembly (6), connector (7), scale removal body (8) and guide head (9), the outer wall of scale removal body (8) is equipped with several spiral cutting swords (81), core bar (3) is located on the body of rod in main body (2) is separately equipped with several impellers (31) from the top down, inlet opening (21) are respectively equipped on main body (2) side wall above each impeller (31), apopore (22) are respectively equipped on main body (2) side wall below each impeller (31), main body (2) inner wall of each apopore (22) lower position cooperates with core bar (3) rotary seal respectively.It works not against gravitational thrusts, and scale removal effect is more preferable.It uses spiral scale removal mechanism, so that the rotation of spiral descaler is carried out scale removal by waterpower compressing, has well solved the problem of oil pipe fouling not easy-clear.
Description
Technical field
The present invention relates to petroleum tools, and in particular to a kind of oilfield oil well oil pipe stain eliminating operation oil pipe stain eliminating device.
Background technique
After oilfield oil well longtime running, pipe inner surface has a large amount of greasy dirt, scale and other fouls.So that pipe
Diameter internal diameter reduces, and causes test, salvaging and other tools that cannot pass through, seriously affects the progress of normal work.Field operations
Personnel are usually to use the gauguste cutter of certain diameter to carry out drifting to solve this problem, but gauguste cutter is rushed by gravity
It hits and works, it is limited that gauguste cutter by weight is limited impact force, can not often pass through.And harder layer of scale, latus rectum
Rule can not remove it at all.
Summary of the invention
The object of the present invention is to provide one kind to work not against gravitational thrusts, the better hydraulic oil pipe of scale removal effect
Descaler.
The technical solution of the invention is as follows: it includes fishing head, main body, core bar, connector, packing element core, packing element assembly, connection
Body, scale removal body and guide head, the lower end for fishing out head are connected by screw thread with the top axial of main body, and core bar is rotatably installed in main body
And be axially connected with main body, core bar is located at the lower end below main body and is connected by screw thread with the top axial of connector, under connector
End is connected by screw thread with the top axial of packing element core, and de- cylinder assembly is sleeved on packing element core, and the lower end of packing element core passes through screw thread
It is connected with the top axial of connector, the upper end of scale removal body is axially connected by screw thread with the lower end of connector, lower end passes through spiral shell
Line is connected with the top axial of guide head, the upper end of packing element core centre bore by being connected outside the radial hole and connector on connector,
It is connected outside the centre bore and radial hole and connector that lower end passes through connector, is equipped with steel in the centre bore of connector from the top down
Ball and pressure spring, steel ball are matched with the lower mouth of packing element core centre bore, and the upper end of pressure spring is matched with steel ball, in lower end and connector
The inner face in heart hole matches, and the outer wall of scale removal body is equipped with several spiral cutting swords, and core bar is located on the main intracorporal body of rod
It is separately equipped with several from the top down and is fixedly mounted on the impeller on core bar and being equipped with helical blade, the main body above each impeller
It is respectively equipped with the connection inlet opening of inside and outside of the main body on side wall, is respectively equipped with connection inside and outside of the main body in the main body wall below each impeller
Apopore, each impeller up and down two sides inlet opening and apopore be connected by the gap between screw between impeller blade, respectively
The main body inner wall of apopore lower position cooperates with core bar rotary seal respectively.
The solution have the advantages that: it works not against gravitational thrusts, and scale removal effect is more preferable.It is using spiral
Scale removal mechanism makes the rotation of spiral descaler carry out scale removal, has well solved oil pipe fouling not easy-clear by waterpower compressing
Problem.It is easy for operation, is purged by rotary scraping to the layer of scale in oil pipe, can quickly remove various dirts
Dirt can also directly be washed away the dirt under removing by water flow, and scale removal is cleaner, is more advantageous to and continues scale removal and next step downwards
Work is gone on smoothly.
Detailed description of the invention
Fig. 1 is cross-sectional view of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1, it includes fishing head 1, main body 2, core bar 3, connector 4, packing element core 5, packing element assembly 6, connector 7, removes
The lower end of dirty body 8 and guide head 9, fishing head 1 is connected by screw thread with the top axial of main body 2, and core bar 3 is rotatably installed in main body 2
It is interior and with main body 2 is axial is connected, core bar 3 is located at the lower end below main body 2 and passes through screw thread to be connected with the top axial of connector 4, connects
First 4 lower end is connected by screw thread with the top axial of packing element core 5, and de- cylinder assembly 6 is sleeved on packing element core 5, under packing element core 5
End is connected by screw thread with the top axial of connector 7, and the upper end of scale removal body 8 passes through the lower end axial direction phase of screw thread and connector 7
Even, lower end is connected by screw thread with the top axial of guide head 9, and the upper end of 5 centre bore of packing element core passes through the radial hole on connector 4
It is connected outside with connector 4, is connected outside the centre bore and radial hole and connector 7 that lower end passes through connector 7, in connector 7
Steel ball 71 and pressure spring 72 are equipped in heart hole from the top down, steel ball 71 matches with the lower mouth of 5 centre bore of packing element core, pressure spring 72 it is upper
End is matched with steel ball 71, lower end is matched with the inner face of 7 centre bore of connector, and the outer wall of scale removal body 8 is equipped with several
Spiral cutting sword 81 is separately equipped with several on the body of rod that core bar 3 is located in main body 2 from the top down and is fixedly mounted on core bar 3
Go up and be equipped with the impeller 31 of helical blade, the water inlet being respectively equipped with inside and outside connection main body 2 on 2 side wall of main body of each 31 top of impeller
The apopore 22 being respectively equipped on 2 side wall of main body below hole 21, each impeller 31 inside and outside connection main body 2, each about 31 impeller
The inlet opening 21 of two sides and apopore 22 are connected by the gap between screw between 31 blade of impeller, each 22 lower position of apopore
2 inner wall of main body respectively with 3 rotary seal of core bar cooperate.
Main body 2 by top connection 23, upper joint sleeve 24, it is upper be shorted 25, middle connector sleeve 26, it is lower be shorted 27, lower joint sleeve 28, under
Connector 29 and lower nut 30 are constituted, and the upper end of top connection 23 is axially connected by screw thread with the lower end of fishing head 1, lower end passes through screw thread
Be connected with the top axial of upper joint sleeve 24, it is upper be shorted 25 upper end by the lower end of screw thread and upper joint sleeve 24 it is axial be connected,
Lower end is connected by screw thread with the top axial of middle connector sleeve 26, and the upper end of lower short circuit 27 passes through under screw thread and middle connector sleeve 26
The axial connected, lower end in end is connected by screw thread with the top axial of lower joint sleeve 28, and the upper end of lower contact 29 is by screw thread under
The lower end of connector sleeve 28 is axially connected, lower end is connected by screw thread with the top axial of lower nut 30.Each inlet opening in main body 2
21 and apopore 22 be respectively arranged on the side wall of upper joint sleeve 24, middle connector sleeve 26 and lower joint sleeve 28, upper short circuit 25, lower short circuit
27 and lower contact 29 upper end respectively with 3 rotary seal of core bar cooperate.
Core bar 3 is made of upper core bar 32 and lower core bar 33, and the upper end of upper core bar 32 is equipped with by screw thread positioned at top connection
Standby cap 34 in 23, upper core bar 32 are upper in top connection 23 on core bar 32 equipped with being sleeved below standby cap 34
Spacer 35, the lower section of upper spacer 35 are set with the upper bearing (metal) 36 being mounted in female connector 24, and the lower section of upper bearing (metal) 36 is equipped with position
In the spacer ring 37 being sleeved on upper core bar 32 with upper 32 rotary seal of core bar cooperation in upper joint sleeve 24, each impeller 31 is distinguished alternate
Every being mounted on upper core bar 32 and be located in upper joint sleeve 24, middle connector sleeve 26 and lower joint sleeve 28, lower core bar 33 it is upper
End is axially connected by screw thread with the lower end of upper core bar 32, lower end is connected by screw thread with the top axial of connector 4, lower core bar 33
Be connected with upper core bar 32 lower section of position by screw thread and 29 rotary seal of lower contact cooperate, lower core bar 33 with 29 turns of lower contact
The lower bearing 38 being mounted in lower contact 29 is set with below dynamic sealing cooperation position, the lower section of lower bearing 38 is equipped under being located at
The lower spacer 39 on lower core bar 33 with lower 30 rotary seal of nut cooperation, the upper end of lower spacer 39 and lower axle are sleeved in nut 30
Hold that 38 inner rings match, lower end is matched with the upper surface of connector 4.
The inner wall of spacer ring 37 and the sealing cooperation that rotates on the outer wall of 24 phase of upper joint sleeve sealing cooperation and with upper core bar 32
On be respectively equipped with seal groove and be separately installed with sealing ring 10.It is upper to be shorted on the outer wall that 25 cooperate with the sealing of 24 phase of upper joint sleeve
It is respectively equipped with seal groove on the inner wall for the sealing cooperation that rotates with upper core bar 32 and is separately installed with sealing ring 10, lower short circuit
27 with middle 26 phase of connector sleeve sealing cooperation outer walls on and with upper core bar 32 rotate sealing cooperation inner wall on be respectively equipped with it is close
Seal slot is simultaneously separately installed with sealing ring 10, on the outer wall of lower contact 29 and 28 phase of lower joint sleeve sealing cooperation and with lower core bar 33
Rotate sealing cooperation inner wall on be respectively equipped with seal groove and be separately installed with sealing ring 10.Lower nut 30 by screw thread with
Lower contact 29 is connected the outer wall matched above position with lower contact 29 equipped with seal groove and is equipped with sealing ring 10.Under
Spacer 39 rotates on the outer wall that sealing cooperates with lower nut 30 and seals with lower 33 phase of core bar and is respectively equipped on the inner wall of cooperation
Seal groove is simultaneously equipped with sealing ring 10.
Packing element assembly 6 is by 63 structure of upper packing element 61, dottle pin 62 and lower rubber cylinder that is successively sleeved on packing element core 5 from the top down
At.
Scale removal body 8 by upper scale removal body 82, be shorted 83 and lower scale removal body 84 constitute, the upper end of upper scale removal body 82 by screw thread with
The lower end of connector 7 is axially connected, lower end is connected by screw thread with the top axial for being shorted 83, and the upper end of lower scale removal body 84 passes through
Screw thread is axially connected with the lower end for being shorted 83, lower end is connected by screw thread with the top axial of guide head 9.The spiral shell of upper scale removal body 82
Revolving 81 periphery of cutting edge, outer diameter is identical up and down, and the periphery of lower 84 spiral cutting sword 81 of scale removal body is upper coarse and lower fine cone-shaped.On
Several high rigidity cutting blades 85 are respectively equipped in the spiral cutting sword 81 of scale removal body 82 and lower scale removal body 84.
Each component is respectively equipped with by the position that screw thread is connected by being threadably mounted on interior threaded part, end and outer
The steady nail that screwed part matches.
Working principle: this descaler is put by the pre- scale removal oil in underground by the wirerope connection fishing head 1 of winch wire on well
Guan Hou, the high pressure water flow inputted from well enter main body 2 by the inlet opening 21 in main body 2, after pushing each impeller 31 to rotate from
Apopore 22 flows out, then next impeller 31 is pushed to rotate, and each rotation of impeller 31 drives core bar 3 to rotate, and core bar 3 passes through connector 4, glue
Tube filler 5 and connector 7 drive scale removal body 8 to rotate, so that the fouling in oil pipe be scraped away.Water flow passes through the radial direction on connector 4
Hole is flowed through compressing steel ball 71 and pressure spring 72 from the centre bore of packing element core 5 and is flowed out from the centre bore and radial hole of connector 7, downwards will
Underground is flushed to by the fouling that scale removal body scrapes away to remove.Steel ball 71 and pressure spring 72 on connector 7 have non-return effect, can be to prevent
Only gushed on down-hole pressure.
Claims (10)
1. hydraulic oil pipe stain eliminating device, it is total including fishing head (1), main body (2), core bar (3), connector (4), packing element core (5), packing element
At (6), connector (7), scale removal body (8) and guide head (9), the lower end for fishing out head (1) passes through the top axial of screw thread and main body (2)
It is connected, core bar (3) is rotatably installed in main body (2) and is axially connected with main body (2), under core bar (3) is located at below main body (2)
End is connected by screw thread with the top axial of connector (4), and the lower end of connector (4) passes through the top axial of screw thread and packing element core (5)
It is connected, de- cylinder assembly (6) are sleeved on packing element core (5), and the lower end of packing element core (5) passes through the upper shaft of screw thread and connector (7)
To being connected, the upper end of scale removal body (8) is axially connected by screw thread with the lower end of connector (7), lower end passes through screw thread and guide head
(9) top axial is connected, and the upper end of packing element core (5) centre bore is connected by the radial hole on connector (4) with connector (4) outside
Be connected outside the centre bore and radial hole and connector (7) that logical, lower end passes through connector (7), the centre bore of connector (7) it is interior from
On to steel ball (71) and pressure spring (72) is had, steel ball (71) is matched with the lower mouth of packing element core (5) centre bore, pressure spring (72)
Upper end is matched with steel ball (71), lower end is matched with the inner face of connector (7) centre bore, it is characterised in that: scale removal body (8)
Outer wall be equipped with several spiral cutting swords (81), separately set on the body of rod that core bar (3) is located in main body (2) from the top down
There are several to be fixedly mounted on the impeller (31) on core bar (3) and being equipped with helical blade, main body (2) side above each impeller (31)
It is respectively equipped with the inlet opening (21) inside and outside connection main body (2) on wall, is respectively equipped on main body (2) side wall below each impeller (31)
The apopore (22) being connected to inside and outside main body (2), the inlet opening (21) of two sides and apopore (22) pass through each impeller (31) up and down
Gap between screw between impeller (31) blade is connected, main body (2) inner wall of each apopore (22) lower position respectively with core bar
(3) rotary seal cooperates.
2. hydraulic oil pipe stain eliminating device as described in claim 1, it is characterised in that the main body (2) by top connection (23),
Upper joint sleeve (24), upper short circuit (25), middle connector sleeve (26), lower short circuit (27), lower joint sleeve (28), lower contact (29) and lower spiral shell
Cap (30) is constituted, and the upper end of top connection (23) is axially connected by screw thread with the lower end for fishing out head (1), lower end passes through screw thread and upper company
The top axial of female connector (24) is connected, the upper upper end for being shorted (25) by screw thread and the lower end of upper joint sleeve (24) it is axial be connected,
Lower end is connected by screw thread with the top axial of middle connector sleeve (26), and the lower upper end for being shorted (27) passes through screw thread and middle connector sleeve
(26) lower end is axially connected, lower end is connected by screw thread with the top axial of lower joint sleeve (28), the upper end of lower contact (29)
Axially it is connected by screw thread with the lower end of lower joint sleeve (28), lower end is connected by screw thread with the top axial of lower nut (30).
3. hydraulic oil pipe stain eliminating device as claimed in claim 2, it is characterised in that each inlet opening on the main body (2)
(21) it is respectively arranged on the side wall of upper joint sleeve (24), middle connector sleeve (26) and lower joint sleeve (28) with apopore (22), it is upper short
The upper end for connecing (25), lower short circuit (27) and lower contact (29) cooperates with core bar (3) rotary seal respectively.
4. hydraulic oil pipe stain eliminating device as claimed in claim 2, it is characterised in that the core bar (3) by upper core bar (32) and
Lower core bar (33) is constituted, and the upper end of upper core bar (32) is equipped with the standby cap (34) in top connection (23), upper core by screw thread
Bar (32) is equipped with the upper spacer (35) being located in top connection (23) for being located at and being sleeved on core bar (32) below standby cap (34),
The upper bearing (metal) (36) being mounted in female connector (24) is set with below upper spacer (35), the lower section of upper bearing (metal) (36) is equipped with position
In the spacer ring (37) being sleeved in upper joint sleeve (24) on upper core bar (32) with upper core bar (32) rotary seal cooperation, each impeller
(31) upper joint sleeve (24), middle connector sleeve (26) and lower joint sleeve are separately mounted on core bar (32) and are located at respectively
(28) in, the upper end of lower core bar (33) is axially connected by screw thread with the lower end of upper core bar (32), lower end passes through screw thread and connector
(4) top axial is connected, and lower core bar (33) is connected the lower section and lower contact (29) of position by screw thread with upper core bar (32)
It is set with below rotary seal cooperation, lower core bar (33) and lower contact (29) rotary seal cooperation position and is mounted on lower contact
(29) lower bearing (38) in, the lower section of lower bearing (38) are equipped with to be located in lower nut (30) and be sleeved on lower core bar (33) under
The lower spacer (39) of nut (30) rotary seal cooperation, the upper end of lower spacer (39) matches with lower bearing (38) inner ring, lower end
It is matched with the upper surface of connector (4).
5. hydraulic oil pipe stain eliminating device as claimed in claim 4, it is characterised in that the spacer ring (37) and upper joint sleeve
(24) it mutually seals and is respectively equipped with seal groove simultaneously on the inner wall for the sealing cooperation that rotates on the outer wall of cooperation and with upper core bar (32)
It is separately installed with sealing ring (10).
6. hydraulic oil pipe stain eliminating device as claimed in claim 4, it is characterised in that upper short circuit (25) and the upper joint sleeve
(24) it mutually seals and is respectively equipped with seal groove simultaneously on the inner wall for the sealing cooperation that rotates on the outer wall of cooperation and with upper core bar (32)
Be separately installed with sealing ring (10), lower short circuit (27) and middle connector sleeve (26) mutually seal on the outer wall of cooperation and with upper core bar (32)
Rotate sealing cooperation inner wall on be respectively equipped with seal groove and be separately installed with sealing ring (10), lower contact (29) and lower company
Female connector (28) mutually seal on the outer wall of cooperation and the inner wall for the sealing cooperation that rotates with lower core bar (33) on be respectively equipped with sealing ring
Slot is simultaneously separately installed with sealing ring (10).
7. hydraulic oil pipe stain eliminating device as claimed in claim 4, it is characterised in that the lower nut (30) by screw thread with
Lower contact (29) is connected the outer wall matched above position with lower contact (29) equipped with seal groove and is equipped with sealing ring
(10), lower spacer (39) rotates on the outer wall that sealing cooperates with lower nut (30) and mutually seals the interior of cooperation with lower core bar (33)
It is respectively equipped with seal groove on wall and sealing ring (10) are installed.
8. hydraulic oil pipe stain eliminating device as described in claim 1, it is characterised in that the packing element assembly (6) is by from the top down
Upper packing element (61), dottle pin (62) and the lower rubber cylinder (63) being successively sleeved on packing element core (5) are constituted.
9. hydraulic oil pipe stain eliminating device as described in claim 1, it is characterised in that the scale removal body (8) is by upper scale removal body
(82), (83) are shorted and lower scale removal body (84) is constituted, the upper end of upper scale removal body (82) passes through the lower end axis of screw thread and connector (7)
It is connected to connected, lower end by screw thread with the top axial for being shorted (83), the upper end of lower scale removal body (84) passes through screw thread and short circuit
(83) lower end is axially connected, lower end is connected by screw thread with the top axial of guide head (9).
10. hydraulic oil pipe stain eliminating device as claimed in claim 9, it is characterised in that the spiral of the upper scale removal body (82) is cut
Cutting sword (81) periphery, outer diameter is identical up and down, the periphery of lower scale removal body (84) spiral cutting sword (81) be it is upper coarse and lower fine cone-shaped,
Several high rigidity cutting blades (85) are respectively equipped in the spiral cutting sword (81) of upper scale removal body (82) and lower scale removal body (84).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203672.8A CN106437622B (en) | 2016-12-23 | 2016-12-23 | Hydraulic oil pipe stain eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203672.8A CN106437622B (en) | 2016-12-23 | 2016-12-23 | Hydraulic oil pipe stain eliminating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106437622A CN106437622A (en) | 2017-02-22 |
| CN106437622B true CN106437622B (en) | 2019-01-04 |
Family
ID=58215376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611203672.8A Active CN106437622B (en) | 2016-12-23 | 2016-12-23 | Hydraulic oil pipe stain eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106437622B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379540B (en) * | 2018-12-29 | 2021-11-30 | 中国石油天然气股份有限公司 | Mechanical pipe-dredging tool for oil-water well |
| CN109577918B (en) * | 2019-01-03 | 2021-01-26 | 中国石油天然气集团有限公司 | Wax-removing and descaling device for oil well |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6808019B1 (en) * | 2002-09-06 | 2004-10-26 | John F. Mabry | Sucker rod guide and paraffin scraper for oil wells |
| CN101988377B (en) * | 2009-08-04 | 2014-03-19 | 中国石化集团胜利石油管理局钻井工艺研究院 | Energy storage type salvageable underground hydraulic impulse tool |
| CN104100231B (en) * | 2014-07-22 | 2016-08-17 | 西南石油大学 | Pit shaft automatic descaling apparatus and descaling method thereof |
| CN204371209U (en) * | 2014-12-31 | 2015-06-03 | 牡丹江博实石油机械科技有限公司 | Salvagable oil pipe stain eliminating blanking plug |
| CN105156070B (en) * | 2015-10-19 | 2018-03-20 | 中国石油化工股份有限公司 | A kind of oil pipe stain eliminating cleans doctor blade system |
| CN206352500U (en) * | 2016-12-23 | 2017-07-25 | 牡丹江博实石油机械科技有限公司 | Hydraulic oil pipe stain eliminating device |
-
2016
- 2016-12-23 CN CN201611203672.8A patent/CN106437622B/en active Active
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| Publication number | Publication date |
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| CN106437622A (en) | 2017-02-22 |
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Effective date of registration: 20200724 Address after: 157000 Heilongjiang District, Mudanjiang City, Dongan Province East seven road Xin'an Street Woodworking Machinery Factory Patentee after: Mudanjiang Jinheng Petroleum Machinery Technology Co.,Ltd. Address before: 157000 Heilongjiang Mudanjiang District, Dongan District, Xin'an Street East seven road Woodworking Machinery Factory Patentee before: MUDANJIANG BOSHI PETROLEUM MACHINERY TECHNOLOGY Co.,Ltd. |