CN110711689A - Process method for coating inside large-sized drill collar - Google Patents
Process method for coating inside large-sized drill collar Download PDFInfo
- Publication number
- CN110711689A CN110711689A CN201910939155.4A CN201910939155A CN110711689A CN 110711689 A CN110711689 A CN 110711689A CN 201910939155 A CN201910939155 A CN 201910939155A CN 110711689 A CN110711689 A CN 110711689A
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- Prior art keywords
- drill collar
- sand blasting
- primer
- finish
- curing
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- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000000576 coating method Methods 0.000 title claims abstract description 28
- 239000011248 coating agent Substances 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 20
- 238000005488 sandblasting Methods 0.000 claims abstract description 59
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 239000003973 paint Substances 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 15
- 238000005422 blasting Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0272—After-treatment with ovens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a process method for coating in a large-size drill collar, which comprises the following steps: s1: cleaning the cleaned large-size drill collar at high temperature in a thermal cleaning furnace; s2: carrying out inner surface steel shot sand blasting treatment on the large-sized drill collar; s3: spraying primer on the inner surface of the large-sized drill collar, and then baking the drill collar in a primer baking furnace; s4: after baking the primer, taking the large-sized drill collar out of the primer baking furnace, placing the drill collar on a finish rotating roller, and spraying finish on the inner surface by using finish spraying equipment; s5: after spraying finish paint, conveying the large-size drill collar to a curing furnace for curing; s6: and (4) carrying out internal coating quality inspection after finishing the finish paint curing. Compared with the prior art, the invention improves the product specification, can prevent the corrosion of the large-specification drill collar in the drilling process, greatly prolongs the service life of the large-specification drill collar and has good economic efficiency.
Description
Technical Field
The invention relates to the technical field of drill collar corrosion prevention, in particular to a process method for coating an inner coating of a large-size drill collar.
Background
With the improvement of oil field development technology, the exploitation of deep wells, ultra-deep wells, high-temperature and high-pressure wells and high-sulfur wells is gradually increased, the requirements of the harsh oil well exploitation working conditions on drilling and exploitation tools are also continuously increased, the drilling fluid and the drilling mud contain corrosive substances such as chloride ions and the like in different degrees in the exploitation process, and the drilling tool can generate the inner wall corrosion phenomenon in the use process, so that the internal corrosion resistance of the drilling tool is necessary. The large-sized drill collar has the characteristics of large single-support weight, large outer diameter and thick wall, and has a great number of difficulties in inner coating construction, high processing difficulty and high cost, so that the inner coating of the large-sized drill collar is of little significance, but the inner coating of the large-sized drill collar is necessary in the scene of special requirements. A set of internal coating construction process method aiming at large-size drill collars is formed, and the capacity expansion of a company product library and the customer acceptance are greatly improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a process method for coating the inner surface of a large-size drill collar.
The purpose of the invention can be realized by the following technical scheme:
a process method for coating an inner coating of a large-size drill collar comprises the following steps:
s1: cleaning the cleaned large-size drill collar at high temperature in a thermal cleaning furnace;
s2: carrying out inner surface steel shot sand blasting treatment on the large-sized drill collar;
s3: spraying primer on the inner surface of the large-sized drill collar, and then baking the drill collar in a primer baking furnace;
s4: after baking the primer, taking the large-sized drill collar out of the primer baking furnace, placing the drill collar on a finish rotating roller, and spraying finish on the inner surface by using finish spraying equipment;
s5: after spraying finish paint, conveying the large-size drill collar to a curing furnace for curing;
s6: and (4) carrying out internal coating quality inspection after finishing the finish paint curing.
As a preferred embodiment of the present invention, the high temperature cleaning in step S1 is divided into three stages that are sequentially performed: in the first stage, the temperature is increased to 290 ℃, and the temperature is kept for 30 min; in the second stage, the temperature is increased to 400 ℃, and the temperature is kept for 90 min; the third stage was maintained at 400 ℃ for 480 min.
As a preferable technical scheme, in step S2, the inner surface of the large-sized drill collar is subjected to steel shot blasting until the anchoring degree of the inner wall reaches 45-60 mu m and the rust removal grade reaches Sa2.5 grade.
As a preferred technical scheme of the invention, in the step S2, a sand blasting device is adopted to perform inner surface steel shot sand blasting treatment on the large-size drill collar, and the sand blasting device comprises:
the rotating assembly comprises a plurality of carrier rollers for bearing the large-specification drill collar and a chuck for clamping and driving the large-specification drill collar to rotate,
the sand blasting assembly comprises a sand blasting trolley and a trolley guide mechanism, wherein the sand blasting trolley is provided with a sand blasting tank and a gun rod, the sand blasting tank is sequentially connected with a sand blasting hose and a sand blasting gun head, the sand blasting hose is arranged along the gun rod, the sand blasting gun head is fixed at the head of the gun rod, and the trolley guide mechanism is used for guiding the sand blasting trolley to reciprocate, so that the sand blasting gun head can stretch into a large-specification drill collar and move axially along the large-specification drill collar.
As the preferable technical scheme of the invention, the trolley guide mechanism is a guide rail, and a stopper for limiting the movement stroke of the sand blasting trolley is arranged on the guide rail.
As a preferable technical scheme of the invention, in step S3, the inner surface primer spraying is carried out on the large-size drill collar by adopting TC4028 phenolic coating, the baking temperature is 195 ℃, and the chain speed is 23 Hz.
As a preferable technical scheme of the invention, in the step S4, TC200P powder coating is adopted as the finish paint.
As a preferable technical scheme of the invention, in the step S5, the curing temperature of the curing oven is 235 ℃, and the chain speed is 10 Hz.
As a preferable technical scheme of the invention, in the step S6, the quality inspection of the inner coating comprises leak point detection and dry film thickness detection, wherein a leak point detector is adopted for the leak detection, and a dry film thickness gauge is adopted for the dry film thickness detection. In the invention, the detection of the missing points requires no missing points in the whole length. The dry film thickness is required to be 150-400 μm.
Compared with the prior art, the invention improves the product specification, can effectively prevent the large-specification drill collar from being corroded in the drilling process, greatly prolongs the service life of the large-specification drill collar, can improve the customer satisfaction of a company and bring additional income through the application of the invention, and has good economic benefit.
Drawings
FIG. 1 is a schematic structural view of a blasting apparatus according to the present invention;
fig. 2 is a schematic structural view of the blasting assembly of the present invention.
In the figure, 1 is a chuck, 21 is a left carrier roller, 22 is a right carrier roller, 3 is a sand blasting trolley, 4 is a sand blasting tank, 41 is a sand blasting hose, 42 is a sand blasting gun head, 5 is a gun rod, 6 is a guide rail, 7 is a limiter, 8 is a large-size drill collar, and 9 is a dust removal component.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
A process method for coating an inner coating of a large-size drill collar comprises the following steps:
s1: cleaning the cleaned large-size drill collar at high temperature in a thermal cleaning furnace;
s2: carrying out inner surface steel shot sand blasting treatment on the large-sized drill collar;
s3: spraying primer on the inner surface of the large-sized drill collar, and then baking the drill collar in a primer baking furnace;
s4: after baking the primer, taking the large-sized drill collar out of the primer baking furnace, placing the drill collar on a finish rotating roller, and spraying finish on the inner surface by using finish spraying equipment;
s5: after spraying finish paint, conveying the large-size drill collar to a curing furnace for curing;
s6: and (4) carrying out internal coating quality inspection after finishing the finish paint curing.
In the present embodiment, the first and second electrodes are,
preferably, the high temperature cleaning in step S1 is divided into three stages that are performed in sequence: in the first stage, the temperature is increased to 290 ℃, and the temperature is kept for 30 min; in the second stage, the temperature is increased to 400 ℃, and the temperature is kept for 90 min; the third stage was maintained at 400 ℃ for 480 min.
In the preferable step S2, the inner surface of the large-size drill collar is subjected to steel shot sand blasting until the degree of anchoring lines on the inner wall reaches 45-60 mu m and the derusting grade reaches Sa2.5 grade. Further preferably, in step S2, a sand blasting device is used to perform sand blasting on the inner surface of the large-sized drill collar, wherein the sand blasting device includes: rotation subassembly and sandblast subassembly, wherein: the rotating assembly comprises a plurality of carrier rollers for bearing the large-size drill collar 8 and a chuck 1 for clamping and driving the large-size drill collar 8 to rotate; the sand blasting component comprises a sand blasting trolley 3 and a trolley guide mechanism, a sand blasting tank 4 and a gun rod 5 are arranged on the sand blasting trolley 3, a sand blasting hose 41 and a sand blasting gun head 42 are sequentially connected onto the sand blasting tank 4, the sand blasting hose 41 is arranged along the gun rod 5, the sand blasting gun head 42 is fixed at the head of the gun rod 5, and the trolley guide mechanism is used for guiding the sand blasting trolley 3 to reciprocate, so that the sand blasting gun head 42 extends into the large-size drill collar 8 and moves axially along the large-size drill collar 8. In the embodiment, two carrier rollers including a left carrier roller 21 and a right carrier roller 22 are adopted, wherein the left carrier roller 21 is supported in the middle of the large-size drill collar 8, the right carrier roller 22 is supported at a position, close to the right end, of the large-size drill collar 8, the chuck 1 is clamped at the left end of the large-size drill collar 8, and the sand blasting assembly is located on the left side of the large-size drill collar 8. Preferably, the sand blasting trolley 3 moves under the dragging of a driving component consisting of a motor and a frequency converter, and the frequency converter adopts a Mitsubishi E7400.75Kw frequency converter. Preferably, the trolley guide mechanism is a guide rail 6, and a stopper 7 for limiting the movement stroke of the sand blasting trolley 3 is arranged on the guide rail 6. It is further preferable that the guide rail 6 is formed by welding 50-angle iron. Preferably, the gun shaft 5 is a hollow tube, the blasting hose 41 is inserted into the gun shaft 5 and is disposed along the axial direction of the gun shaft 5, and the blasting gun head 42 is fixed to the head of the gun shaft 5 (by a fixing means such as a bolt). In the embodiment, the sand blasting tank 4 uses compressed air as power to spray the grinding materials out through the sand blasting gun head, and the sand blasting gun head made of boron carbide is preferably used for the sand blasting gun head. In addition, the position of the limiting stopper 7 in the embodiment can be changed along the length direction of the guide rail 6, and the height position of the gun rod 5 on the sand blasting trolley 3 can be adjusted. The sand blasting device further comprises a dust removal assembly 9, wherein the dust removal assembly is arranged on the right side of the large-specification drill collar 8 and can be close to or far away from the large-specification drill collar 8 through the movable wheels and the rail. The dust-removing assembly 9 can adopt various types of dust-removing equipment, such as a bag type dust remover, a cyclone dust remover and the like, and when the dust-removing assembly is used, the dust-containing gas inlet of the dust-removing assembly 9 is aligned with the large-size drill collar 8.
In the preferable step S3, the TC4028 phenolic coating is adopted to spray the primer on the inner surface of the large-sized drill collar, the baking temperature is 195 ℃, and the chain speed is 23 Hz.
Preferably, in step S4, the finishing paint is TC200P powder paint.
Preferably, in step S5, the curing temperature of the curing oven is 235 ℃ and the chain speed is 10 Hz.
Preferably, in step S6, the quality inspection of the inner coating includes leak point detection and dry film thickness detection, the leak point detection is used for the electric leakage detection, and the dry film thickness detection is performed by using a dry film thickness gauge. In this embodiment, the missing point detection requires full-length missing point-free. The dry film thickness is required to be 150-400 μm.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (9)
1. A process method for coating the inner surface of a large-size drill collar is characterized by comprising the following steps:
s1: cleaning the cleaned large-size drill collar at high temperature in a thermal cleaning furnace;
s2: carrying out inner surface steel shot sand blasting treatment on the large-sized drill collar;
s3: spraying primer on the inner surface of the large-sized drill collar, and then baking the drill collar in a primer baking furnace;
s4: after baking the primer, taking the large-sized drill collar out of the primer baking furnace, placing the drill collar on a finish rotating roller, and spraying finish on the inner surface by using finish spraying equipment;
s5: after spraying finish paint, conveying the large-size drill collar to a curing furnace for curing;
s6: and (4) carrying out internal coating quality inspection after finishing the finish paint curing.
2. The process of claim 1, wherein the high temperature cleaning step S1 comprises three sequential stages: in the first stage, the temperature is increased to 290 ℃, and the temperature is kept for 30 min; in the second stage, the temperature is increased to 400 ℃, and the temperature is kept for 90 min; the third stage was maintained at 400 ℃ for 480 min.
3. The process as claimed in claim 1, wherein in step S2, the large size drill collar is treated by shot blasting to reach an inner wall anchoring depth of 45-60 μm and a rust removal rating of sa 2.5.
4. The internal coating process method for large-sized drill collars as claimed in claim 1 or 3, wherein the step S2 is performed by blasting the inner surfaces of the large-sized drill collars with steel shots by using a blasting device, wherein the blasting device comprises:
the rotating assembly comprises a plurality of carrier rollers for bearing the large-specification drill collar and a chuck for clamping and driving the large-specification drill collar to rotate,
the sand blasting assembly comprises a sand blasting trolley and a trolley guide mechanism, wherein the sand blasting trolley is provided with a sand blasting tank and a gun rod, the sand blasting tank is sequentially connected with a sand blasting hose and a sand blasting gun head, the sand blasting hose is arranged along the gun rod, the sand blasting gun head is fixed at the head of the gun rod, and the trolley guide mechanism is used for guiding the sand blasting trolley to reciprocate, so that the sand blasting gun head extends into a large-specification drill collar and moves axially along the large-specification drill collar.
5. The process method for internally coating the large-size drill collar as claimed in claim 4, wherein the trolley guide mechanism is a guide rail, and a stopper for limiting the movement stroke of the sand blasting trolley is arranged on the guide rail.
6. The process of claim 1, wherein in step S3, the inner surface of the large-format drill collar is coated with TC4028 phenolic paint at 195 ℃ and 23 Hz.
7. The process of claim 1, wherein in step S4, the topcoat is TC200P powder coating.
8. The process of claim 1, wherein in step S5, the curing temperature of the curing oven is 235 ℃ and the chain speed is 10 Hz.
9. The process of claim 1, wherein in step S6, the quality inspection of the inner coating includes a leak detection and a dry film thickness detection, the leak detection is a leak detector, and the dry film thickness detection is a dry film thickness gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910939155.4A CN110711689A (en) | 2019-09-30 | 2019-09-30 | Process method for coating inside large-sized drill collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910939155.4A CN110711689A (en) | 2019-09-30 | 2019-09-30 | Process method for coating inside large-sized drill collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110711689A true CN110711689A (en) | 2020-01-21 |
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ID=69212086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910939155.4A Pending CN110711689A (en) | 2019-09-30 | 2019-09-30 | Process method for coating inside large-sized drill collar |
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| Country | Link |
|---|---|
| CN (1) | CN110711689A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033046U (en) * | 1986-11-06 | 1989-02-22 | 地质矿产部探矿工程研究所 | Sand blower with water and gas dual-purpose |
| CN101422879A (en) * | 2008-11-24 | 2009-05-06 | 中北大学 | Ultralong thin-hole bore superficial hardening device |
| CN203542293U (en) * | 2013-07-31 | 2014-04-16 | 陈靖忠 | Drill collar inner step grinding machine |
| CN104138830A (en) * | 2013-05-10 | 2014-11-12 | 上海图博可特石油管道涂层有限公司 | Internal coating process for drill collar for well drilling |
| CN104772269A (en) * | 2014-01-10 | 2015-07-15 | 上海图博可特石油管道涂层有限公司 | Drill rod powder internal coating technology for well drilling |
| CN205438248U (en) * | 2016-01-08 | 2016-08-10 | 上海图博可特石油管道涂层有限公司 | Interior surface treatment device of tubular product for oil drilling |
| CN205572187U (en) * | 2016-04-28 | 2016-09-14 | 胜利油田胜鑫防腐有限责任公司 | Sand blasting unit and spout sand gun mouth thereof |
| CN207874004U (en) * | 2018-01-29 | 2018-09-18 | 上海广大基础工程有限公司 | A kind of drilling rod automatic cleaning apparatus |
-
2019
- 2019-09-30 CN CN201910939155.4A patent/CN110711689A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033046U (en) * | 1986-11-06 | 1989-02-22 | 地质矿产部探矿工程研究所 | Sand blower with water and gas dual-purpose |
| CN101422879A (en) * | 2008-11-24 | 2009-05-06 | 中北大学 | Ultralong thin-hole bore superficial hardening device |
| CN104138830A (en) * | 2013-05-10 | 2014-11-12 | 上海图博可特石油管道涂层有限公司 | Internal coating process for drill collar for well drilling |
| CN203542293U (en) * | 2013-07-31 | 2014-04-16 | 陈靖忠 | Drill collar inner step grinding machine |
| CN104772269A (en) * | 2014-01-10 | 2015-07-15 | 上海图博可特石油管道涂层有限公司 | Drill rod powder internal coating technology for well drilling |
| CN205438248U (en) * | 2016-01-08 | 2016-08-10 | 上海图博可特石油管道涂层有限公司 | Interior surface treatment device of tubular product for oil drilling |
| CN205572187U (en) * | 2016-04-28 | 2016-09-14 | 胜利油田胜鑫防腐有限责任公司 | Sand blasting unit and spout sand gun mouth thereof |
| CN207874004U (en) * | 2018-01-29 | 2018-09-18 | 上海广大基础工程有限公司 | A kind of drilling rod automatic cleaning apparatus |
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Application publication date: 20200121 |