CN104941964B - A kind of pipeline corrosion protection coating region pipe end cleaning technology - Google Patents
A kind of pipeline corrosion protection coating region pipe end cleaning technology Download PDFInfo
- Publication number
- CN104941964B CN104941964B CN201510260969.7A CN201510260969A CN104941964B CN 104941964 B CN104941964 B CN 104941964B CN 201510260969 A CN201510260969 A CN 201510260969A CN 104941964 B CN104941964 B CN 104941964B
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- pipe end
- water
- pipe
- cylinder
- support plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/021—Cleaning pipe ends or pipe fittings, e.g. before soldering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a kind of pipeline corrosion protection coating region pipe end cleaning technology, using following steps：One) in coating pipeline area, pipe end cleaning plant is arranged in into setting regions, pipe end cleaning plant includes water-cooling system and cleaning system, cleaning system includes frame, left and right two sets of hob cutter mechanisms arranged side by side and left and right two sets of shovel blade mechanisms arranged side by side are installed at the top of frame, two sets of shovel blade mechanisms are centrally located；Water-cooling system includes water outlet steel pipe, and multiple apopores are provided with the side wall of water outlet steel pipe, and water outlet steel pipe is fixed on the lower section of perching knife structure；Make the original position of top support plate, shovel blade mechanism and hob cutter mechanism in cleaning；Two) pipe end of the pipeline after completing to apply starts pipe end cleaning plant when arrangement is described the region of cleaning plant, after completing pipe end cleaning, makes pipe end cleaning plant reset.The present invention carries out mechanization to the pipe end of pipeline corrosion protection coating region using the cleaning plant of mechanization and clears up automatically, and efficiency high, security are good.
Description
Technical field
The present invention relates to a kind of technique for pipeline corrosion protection production, particularly a kind of pipeline corrosion protection coating region pipe end cleaning
Technique.
Background technology
With the development of pipeline corrosion protection, production technology is improved constantly.To ensure the welding procedure between steel pipe, preservative process
Need the naked steel for carrying out certain size in pipe end to reserve, the technique for adopting at present for：A work is arranged in corrosion prevention workshop coating region
Adjacent two pipe ends reserved anticorrosive coat is scratched by people with special stroke of knife, then by two workmans at product inspection station (below
Claim four stations) clear up the coating that pipe end is scratched.There are many defects in this kind of technique：One) four stage spaces are limited, when every tubing is stopped
Between it is short, surrounding also has quality inspection operation, and operation comparatively dense has corresponding potential safety hazard.Two) this technique by three employees in difference
Position is carried out, and is manual operations, there is the waste of manpower.Three) coating region steel pipe skin temperature reaches 200 degree or so, manually
There is the danger scalded in high-temperature operation.
The content of the invention
The present invention provides a kind of pipeline corrosion protection coating region pipe end cleaning to solve technical problem present in known technology
Pipe end cleaning process is moved forward by technique, the technique, reserved with coating region pipe end to scratch operation and merge, and is existed using mechanized equipment
Coating region is on-line automatic to be completed.
The present invention is adopted the technical scheme that by solving technical problem present in known technology：A kind of pipeline corrosion protection is applied
Deposited area's pipe end cleaning technology, using following steps：One) in coating pipeline area, pipe end cleaning plant is arranged in into setting regions,
The pipe end cleaning plant includes water-cooling system and cleaning system, and the cleaning system includes frame, in frame
Top is provided with left and right two sets of hob cutter mechanisms arranged side by side and left and right two sets of shovel blade mechanisms arranged side by side, and two sets of shovel blade mechanisms are placed in the middle
Arrange；Often covering the shovel blade mechanism includes perching knife, shovel seat, cylinder I, support I and two guide posts I, and the perching knife is fixed
On the shovel seat, the cylinder I is fixed on the support I, and the support I is fixed on the top of the frame, two
The guide post I is slidably connected on the support I, and the shovel seat is fixed on two guide posts I, is led described in two
It is connected with the output end of the cylinder I to bar I by connector I；Often covering the hob cutter mechanism includes hobboing cutter, hob head, gas
Cylinder II, support II and two guide posts II, the hobboing cutter are arranged on the hob head, and the cylinder II is fixed on the support
On II, the support II is fixed on the top of the frame, and two guide posts II are slidably connected on the support II, institute
State hob head to be fixed on two guide posts II, two guide posts II are defeated with the cylinder II by connector II
Go out end connection；The water-cooling system includes water tank, water pump, flexible connection water pipe and water outlet steel pipe, and the water tank is fixedly installed, institute
The import for stating water pump is connected with the water tank, and the outlet of the water pump is connected with the import of the flexible connection water pipe, described soft
The outlet of property connecting water pipe is connected with the import of the water outlet steel pipe, on the side wall of the water outlet steel pipe is provided with multiple jet sides
To the apopore towards cleaned pipe end, the water outlet steel pipe is arranged on the lower section of the perching knife and is fixed on the support I；
Make the original position of the top support plate, the shovel blade mechanism and the hob cutter mechanism in cleaning；Two) after completing to apply
Pipeline pipe end through being disposed with it is described state the region of cleaning plant when, start the Motor drive described in screw mandrel I rotate, band
Move the top support plate and the shovel blade mechanism thereon, the hob cutter mechanism and the water outlet steel pipe and complete after coating
Tunnel synchronization moves right, while starting the water pump and the cylinder II, the cylinder II drives the hobboing cutter reach to cut
Pipe surface coating, the water outlet steel pipe spray cooling water, then, start the cylinder I and drive the perching knife reach, shovel to fall pipe
The coating on road surface；After completing pipe end cleaning, the top support plate, the shovel blade mechanism and the hob cutter mechanism reach cleaning
Final position, makes the cylinder II drive the hobboing cutter to reset, and makes the cylinder I drive the perching knife to reset, makes the motor
The top braces sheet reset is driven, the water pump is closed, is completed a duty cycle.
The frame includes top support plate, midfoot support plate, middle frame and the base for setting gradually from top to bottom,
The midfoot support plate is provided with guide rail horizontal-extending in left-right direction, is provided with slide block, on the slide block on the guide rail
The top support plate affixed with which is provided with, screw is connected with the bottom surface of the top support plate, the screw is installed
On screw mandrel I, the screw mandrel I and the guide rail parallel, the screw mandrel I are supported on the midfoot support plate, the screw mandrel I by
Motor drive, the motor are arranged on the midfoot support plate；It is connected with the bottom surface of the midfoot support plate and vertically sets
The screw mandrel II put, the screw mandrel II are arranged in the via of the top board of the middle frame, on the screw mandrel II are provided with two
Individual locknut I, two locknuts I are separately positioned in the cover top surface and lower surface of the middle frame；The middle part frame
Erection has base plate, and chute horizontal-extending along the longitudinal direction and supporting vertical plate, the base plate are provided with the top surface of the base
In the chute, the base plate is provided with locking screw, and the locking screw is connected on the chute, in the base plate
On be connected with screw mandrel III horizontal-extending along the longitudinal direction, the screw mandrel III is arranged in the via of the supporting vertical plate, in institute
State and two locknuts II are installed on screw mandrel III, two locknuts II are separately positioned on the front surface and rear table of the supporting vertical plate
On face.
The present invention has the advantages and positive effects that：Using pipe of the cleaning plant of mechanization to pipeline corrosion protection coating region
End carries out mechanization and clears up automatically, and efficiency high, security are good.Existing pipe end prune job is moved forward, it is pre- with coating region pipe end
Stay and scratch operation merging, improve existing process, only need one man operation, it is possible to reduce two workmans, save human cost, and drop
The low labour intensity of operating personnel, reduces the security risk of prune job.
Description of the drawings
Fig. 1 is the stereogram of pipe end cleaning plant of the present invention；
Front views of the Fig. 2 for Fig. 1；
Top views of the Fig. 3 for Fig. 1；
Sectional views of the Fig. 4 for Fig. 1.
In figure：1-1, top support plate；1-2, midfoot support plate；1-3, middle frame；1-4, base；1-5, guide rail；1-
6th, slide block；1-7, screw；1-8, screw mandrel I；1-9, motor；1-10, screw mandrel II；1-11, locknut I；1-12, base plate；1-13, cunning
Groove；1-14, supporting vertical plate；1-15, locking screw；1-16, screw mandrel III；1-17, locknut II；2-1, hobboing cutter；2-2, hob head；2-
3rd, cylinder II；2-4, support II；2-5, guide post II；2-6, connector；3-1, perching knife；3-2, shovel seat；3-3, cylinder I；3-
4th, support I；3-5, guide post I；3-6, connector I；4-1, water tank；4-2, water pump；4-3, flexible connection water pipe；4-4, water outlet steel
Pipe.
Specific embodiment
For the content of the invention, feature and effect of the present invention can be further appreciated that, following examples are hereby enumerated, and coordinates accompanying drawing
Describe in detail as follows：
Refer to Fig. 1～Fig. 4, a kind of pipeline corrosion protection coating region pipe end cleaning technology, using following steps：
One) in coating pipeline area, pipe end cleaning plant is arranged in into setting regions, the pipe end cleaning plant, including water
Cooling system and cleaning system, the cleaning system include frame, left and right two sets of hobboing cutter machines arranged side by side are provided with the top of frame
Structure and left and right two sets of shovel blade mechanisms arranged side by side, two sets of shovel blade mechanisms are centrally located.
Often covering the shovel blade mechanism includes perching knife 3-1, shovel seat 3-2, I 3-3 of cylinder, I 3-4 and two guide post of support
I 3-5, the perching knife 3-1 are fixed on the shovel seat 3-2, and I 3-3 of the cylinder is fixed on I 3-4 of the support, described
I 3-4 of frame is fixed on the top of the frame；Two I 3-5 of the guide post are slidably connected on I 3-4 of the support, the shovel
Tool rest 3-2 is fixed on two I 3-5 of the guide post, and two I 3-5 of the guide post pass through I 3-6 of connector and the cylinder I
The output end connection of 3-3.
The hob cutter mechanism is covered often including hobboing cutter 2-1, hob head 2-2, II 2-3 of cylinder, II 2-4 and two guiding of support
, on the hob head 2-2, II 2-3 of the cylinder is fixed on II 2-3 of the support for II 2-5 of bar, the hobboing cutter 2-1,
II 2-3 of the support is fixed on the top of the frame, and two II 2-5 of the guide post are slidably connected at II 2-4 of the support
On, the hob head 2-2 is fixed on two II 2-5 of the guide post, and two II 2-5 of the guide post pass through II 2- of connector
6 are connected with the output end of II 2-3 of the cylinder.
The water-cooling system includes water tank 4-1, water pump 4-2, flexible connection water pipe 4-3 and water outlet steel pipe 4-4, the water tank
4-1 is fixedly installed, and the import of the water pump 4-2 is connected with the water tank 4-1, and the outlet of the water pump 4-2 is with the flexibility even
The import connection of water receiving pipe 4-3, the outlet of the flexible connection water pipe 4-3 is connected with the import of the water outlet steel pipe 4-4, in institute
The side wall for stating water outlet steel pipe 4-4 is provided with multiple jet directions towards the apopore of cleaned pipe end, and the water outlet steel pipe 4-4 sets
Put in the lower section of the perching knife 3-1 and be fixed on I 3-4 of the support.Make top support plate 1-1, the shovel blade mechanism
With original position of the hob cutter mechanism in cleaning.
In the present embodiment, the position adjustments of system are cleared up for convenience, before and after the frame is designed to, up and down and left
Right adjustable structure.Top support plate 1-1 that the frame includes setting gradually from top to bottom, midfoot support plate 1-2, in
Portion framework 1-3 and base 1-4.
Guide rail 1-5 horizontal-extending in left-right direction is provided with the midfoot support plate 1-2, is pacified on the guide rail 1-5
Equipped with slide block 1-6, the slide block 1-6 is provided with top support plate 1-1 affixed with which, in top support plate 1-1
Bottom surface on be connected with screw 1-7, on I 1-8 of screw mandrel, I 1-8 of the screw mandrel and guide rail 1-5 puts down the screw 1-7
OK, I 1-8 of the screw mandrel is supported on the midfoot support plate 1-2, and I 1-8 of the screw mandrel is driven by motor 1-9, the motor 1-
9 on the midfoot support plate 1-2.The present embodiment enables top support plate 1-1 or so to move using screw-drive mechanism
It is dynamic.
Vertically arranged II 1-10 of screw mandrel, II 1-10 of the screw mandrel are connected with the bottom surface of the midfoot support plate 1-2
In the via of the top board of middle frame 1-3, two I 1-11 of locknut are installed on II 1-10 of the screw mandrel, two
Individual I 1-11 of the locknut is separately positioned in the cover top surface and lower surface of middle frame 1-3.The present embodiment is by twisting
Tight I 1-11 of locknut is adjustable come the upper-lower position for realizing midfoot support plate 1-2.
Middle frame 1-3 is provided with base plate 1-12, is provided with level along the longitudinal direction and prolongs on the top surface of the base 1-4
The chute 1-13 for stretching and supporting vertical plate 1-14, in the chute 1-13, the base plate 1-12 is provided with the base plate 1-12
Locking screw 1-15, the locking screw 1-15 are connected on the chute 1-13, are connected with along front on the base plate 1-12
Horizontal-extending III 1-16 of screw mandrel of rear direction, III 1-16 of the screw mandrel are arranged in the via of supporting vertical plate 1-14, in institute
State and two II 1-17 of locknut are installed on III 1-6 of screw mandrel, two II 1-17 of the locknut are separately positioned on supporting vertical plate 1-
On 14 front surface and rear surface.Locking screw 1-15 is unclamped, middle frame 1-3 can be realized by tightening II 1-17 of locknut
Front and back position is adjusted.
Two) pipe end of the pipeline after completing to apply through being disposed with it is described state the region of cleaning plant when, start described
Motor 1-9 drives I 1-8 of the screw mandrel rotations, drives top support plate 1-1 and the shovel blade mechanism thereon, the rolling
Cutter mechanism and the water outlet steel pipe 4-4 are moved right with the tunnel synchronization completed after coating, while starting the water pump 4-2 and institute
II 2-3 of cylinder is stated, II 2-3 of the cylinder drives the hobboing cutter 2-1 reaches to cut pipe surface coating, the water outlet steel pipe 4-4
Cooling water is sprayed, then, is started I 3-3 of cylinder and is driven the perching knife 3-1 reaches, shovel to fall the coating of pipe surface；Complete pipe
After the cleaning of end, top support plate 1-1, the shovel blade mechanism and the hob cutter mechanism reach cleaning final position, make described
II 2-3 of cylinder drives the hobboing cutter 2-1 to reset, and makes I 3-3 of the cylinder drive the perching knife 3-1 to reset, makes the motor 1-9
Drive top support plate 1-1 to reset, close the water pump 4-2, complete a duty cycle.
Although being described to the preferred embodiments of the present invention above in conjunction with accompanying drawing, the invention is not limited in
The specific embodiment stated, above-mentioned specific embodiment are only schematic, be not it is restricted, this area it is common
Technical staff in the case of without departing from present inventive concept and scope of the claimed protection, may be used also under the enlightenment of the present invention
To make many forms, these are belonged within protection scope of the present invention.
Claims (1)
1. a kind of pipeline corrosion protection coating region pipe end cleaning technology, it is characterised in that adopt following steps：
One) in coating pipeline area, pipe end cleaning plant is arranged in into setting regions,
The pipe end cleaning plant includes water-cooling system and cleaning system, and the cleaning system includes frame, at the top of frame
Left and right two sets of hob cutter mechanisms arranged side by side and left and right two sets of shovel blade mechanisms arranged side by side are installed, two sets of shovel blade mechanisms are set between two parties
Put；
Often covering the shovel blade mechanism includes perching knife, shovel seat, cylinder I, support I and two guide posts I, and the perching knife is fixed on
On the shovel seat, the cylinder I is fixed on the support I, and the support I is fixed on the top of the frame, two institutes
State guide post I to be slidably connected on the support I, the shovel seat is fixed on two guide posts I, two guiding
Bar I is connected with the output end of the cylinder I by connector I；
Often covering the hob cutter mechanism includes hobboing cutter, hob head, cylinder II, support II and two guide posts II, the hobboing cutter peace
It is mounted on the hob head, the cylinder II is fixed on the support II, the support II is fixed on the top of the frame,
Two guide posts II are slidably connected on the support II, and the hob head is fixed on two guide posts II, and two
Guide post II described in root is connected with the output end of the cylinder II by connector II；
The water-cooling system includes water tank, water pump, flexible connection water pipe and water outlet steel pipe, and the water tank is fixedly installed, the water
The import of pump is connected with the water tank, and the outlet of the water pump is connected with the import of the flexible connection water pipe, and the flexibility is even
The outlet of water receiving pipe is connected with the import of the water outlet steel pipe, and multiple jet direction courts are provided with the side wall of the water outlet steel pipe
To the apopore of cleaned pipe end, the water outlet steel pipe is arranged on the lower section of the perching knife and is fixed on the support I；
The frame includes top support plate, midfoot support plate, middle frame and the base for setting gradually from top to bottom, described
Midfoot support plate is provided with guide rail horizontal-extending in left-right direction, and slide block is provided with the guide rail, and the slide block is provided with
The top support plate affixed with which, is connected with screw on the bottom surface of the top support plate, and the screw is arranged on silk
On bar I, the screw mandrel I and the guide rail parallel, the screw mandrel I are supported on the midfoot support plate, and the screw mandrel I is by motor
Drive, the motor is arranged on the midfoot support plate；
Vertically arranged screw mandrel II is connected with the bottom surface of the midfoot support plate, the screw mandrel II is arranged on the middle part frame
In the via of the top board of frame, two locknuts I are installed on the screw mandrel II, two locknuts I be separately positioned on it is described in
In the cover top surface and lower surface of portion's framework；
The middle frame is provided with base plate, and chute horizontal-extending along the longitudinal direction and support are provided with the top surface of the base
Riser, the base plate are arranged in the chute, and the base plate is provided with locking screw, and the locking screw is connected to the chute
On, screw mandrel III horizontal-extending along the longitudinal direction is connected with the base plate, the screw mandrel III is arranged on the supporting vertical plate
Via in, two locknuts II are installed on the screw mandrel III, two locknuts II are separately positioned on the supporting vertical plate
Front surface and rear surface on；
Make the original position of the top support plate, the shovel blade mechanism and the hob cutter mechanism in cleaning；
Two) pipe end of the pipeline after completing to apply when being disposed with the region of the cleaning plant starts the motor and drives
The dynamic screw mandrel I rotates, and drives the top support plate and the shovel blade mechanism thereon, the hob cutter mechanism and the water outlet
Steel pipe is moved right with the tunnel synchronization completed after coating, while starting the water pump and the cylinder II, the cylinder II drives
Pipe surface coating is cut in the dynamic hobboing cutter reach, and the water outlet steel pipe sprays cooling water, then, starts the cylinder I and drives
The coating of pipe surface is fallen in the perching knife reach, shovel；Complete pipe end cleaning after, the top support plate, the shovel blade mechanism and
The hob cutter mechanism reaches cleaning final position, makes the cylinder II drive the hobboing cutter to reset, drives the cylinder I described
Perching knife resets, and makes the motor drive the top braces sheet reset, closes the water pump, complete a duty cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260969.7A CN104941964B (en) | 2015-05-20 | 2015-05-20 | A kind of pipeline corrosion protection coating region pipe end cleaning technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260969.7A CN104941964B (en) | 2015-05-20 | 2015-05-20 | A kind of pipeline corrosion protection coating region pipe end cleaning technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104941964A CN104941964A (en) | 2015-09-30 |
| CN104941964B true CN104941964B (en) | 2017-03-29 |
Family
ID=54157323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510260969.7A Active CN104941964B (en) | 2015-05-20 | 2015-05-20 | A kind of pipeline corrosion protection coating region pipe end cleaning technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN104941964B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226759B (en) * | 2020-09-24 | 2022-09-06 | 哈尔滨科能熔敷科技有限公司 | Cladding tube bank processing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087971A1 (en) * | 1982-03-01 | 1983-09-07 | Mcdermott Incorporated | Apparatus for removing covering material from underwater pipelines |
| CN102125916A (en) * | 2010-11-24 | 2011-07-20 | 番禺珠江钢管有限公司 | Process for removing anti-corrosive coating from steel pipe end |
| CN202070973U (en) * | 2011-03-29 | 2011-12-14 | 天华化工机械及自动化研究设计院 | Anticorrosive coating removing and chamfer forming device for pipe end of outer wall of steel pipe |
| CN202780067U (en) * | 2012-10-17 | 2013-03-13 | 成都蕴达管业有限公司 | Special tool for peeling end of portable plastic-lined aluminum alloy pipe |
| CN103542197A (en) * | 2013-10-15 | 2014-01-29 | 浙江越州防腐工程有限公司 | Anticorrosive coating production line and process for steel pipes |
| CN103737084A (en) * | 2013-12-30 | 2014-04-23 | 中国海洋石油总公司 | Pipe end coating cutting device |
| CN204277113U (en) * | 2014-11-28 | 2015-04-22 | 长春亚大汽车零件制造有限公司 | Metal tube pipe end processor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3563391B2 (en) * | 2002-02-07 | 2004-09-08 | 有信株式会社 | Cleaning, polishing and painting method of steel pipe inner surface using pipe end closing jig |
-
2015
- 2015-05-20 CN CN201510260969.7A patent/CN104941964B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087971A1 (en) * | 1982-03-01 | 1983-09-07 | Mcdermott Incorporated | Apparatus for removing covering material from underwater pipelines |
| CN102125916A (en) * | 2010-11-24 | 2011-07-20 | 番禺珠江钢管有限公司 | Process for removing anti-corrosive coating from steel pipe end |
| CN202070973U (en) * | 2011-03-29 | 2011-12-14 | 天华化工机械及自动化研究设计院 | Anticorrosive coating removing and chamfer forming device for pipe end of outer wall of steel pipe |
| CN202780067U (en) * | 2012-10-17 | 2013-03-13 | 成都蕴达管业有限公司 | Special tool for peeling end of portable plastic-lined aluminum alloy pipe |
| CN103542197A (en) * | 2013-10-15 | 2014-01-29 | 浙江越州防腐工程有限公司 | Anticorrosive coating production line and process for steel pipes |
| CN103737084A (en) * | 2013-12-30 | 2014-04-23 | 中国海洋石油总公司 | Pipe end coating cutting device |
| CN204277113U (en) * | 2014-11-28 | 2015-04-22 | 长春亚大汽车零件制造有限公司 | Metal tube pipe end processor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104941964A (en) | 2015-09-30 |
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Effective date of registration: 20161214 Address after: 100010 Beijing city Dongcheng District Dongzhimen Street No. 6 Applicant after: CNOOC Energy Technology Co., Ltd. Address before: 100010 Dongcheng District, Chaoyangmen, North Street, No. 25, CNOOC building, mailbox,, 4705 Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Energy Technology Co., Ltd. |
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Effective date of registration: 20180207 Address after: Gaolan Port Economic Zone 519090 Guangdong city of Zhuhai Province Hong Kong Ping Road No. 348 Co-patentee after: CNOOC Energy Development Co., Ltd. Patentee after: CNOOC DEVELOPMENT ZHUHAI PIPELINE ENGINEERING CO., LTD. Address before: 100010 Beijing city Dongcheng District Dongzhimen Street No. 6 Patentee before: CNOOC Energy Development Co., Ltd. |