CN112554810A - High-strength corrosion-resistant aluminum alloy special threaded oil well pipe - Google Patents
High-strength corrosion-resistant aluminum alloy special threaded oil well pipe Download PDFInfo
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- CN112554810A CN112554810A CN202011563644.3A CN202011563644A CN112554810A CN 112554810 A CN112554810 A CN 112554810A CN 202011563644 A CN202011563644 A CN 202011563644A CN 112554810 A CN112554810 A CN 112554810A
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- oil well
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 85
- 238000005260 corrosion Methods 0.000 title claims abstract description 40
- 230000007797 corrosion Effects 0.000 title claims abstract description 39
- 239000003129 oil well Substances 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 230000008878 coupling Effects 0.000 claims abstract description 35
- 238000010168 coupling process Methods 0.000 claims abstract description 35
- 238000005859 coupling reaction Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 13
- 238000004381 surface treatment Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 18
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 11
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 9
- 239000000956 alloy Substances 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 19
- 239000007789 gas Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a high-strength corrosion-resistant aluminum alloy special threaded oil well pipe. The technical scheme is as follows: including aluminum alloy pipe and aluminum alloy coupling, the outer surface processing of outer end at aluminum alloy pipe has the external screw thread, has the internal thread at the inner wall processing of aluminum alloy coupling tip, is equipped with bellied moment of torsion step between the internal thread at aluminum alloy coupling's both ends, is equipped with sealed face in the toper in the internal screw thread rear end of coupling, and the design has the outer seal face in the outer end of the external screw thread of pipe, through outer seal face and toper inner seal face cooperation. The beneficial effects are that: the invention is made of aluminum alloy materials, the weight is small, the whole weight of the well column is reduced, and the exploitation cost of the extended reach well is reduced; in addition, the aluminum alloy material is corrosion-resistant and shear-resistant, and the special sealing design can reduce the oil extraction cost of an oil well containing carbon dioxide, hydrogen sulfide and chloride ions for corrosion while ensuring the service life of the well column.
Description
Technical Field
The invention relates to a petroleum industry pipe, in particular to a high-strength corrosion-resistant aluminum alloy special threaded oil well pipe.
Background
The oil gas well is a channel for obtaining crude oil and natural gas, the petroleum casing is a life line for maintaining the operation of the oil well, the underground stress state is complex due to different geological conditions, and the comprehensive action of pulling, pressing, bending and twisting stress acts on the pipe body, so that higher requirements are provided for the quality of the casing, and once the casing is damaged due to a certain reason, the yield reduction or even the abandonment of the whole well can be caused. How to require the casing to have the corrosion resistance under the corrosive environment and the collapse resistance in places with complex geological conditions is always the main research direction in the field of oil and gas well design and manufacture. According to the statistics of the drilling contractor association (IADC), the average direct loss of 10.6 ten thousand dollars of the breakage accidents of each drilling column in China is achieved. Damage to the drill string or casing string can sometimes result in well abandonment. The cost of 1 oil well in western oil field in China is about several thousands of yuan or even hundreds of millions of yuan RMB. The life of the casing directly determines the life of the oil well, which in turn determines the life of the oil field, so that the safety, reliability, service life and economy of the oil well pipe are of great importance to the oil industry.
With the increasingly harsh production conditions of oil and gas wells, the corrosive environment that oil well pipes face is increasingly harsh. Among them, the combined corrosion of CO2, H2S and Cl-and other mediums has become a major problem and research hotspot of the corrosion protection research of the world petroleum industry. Accidents caused by corrosion failure of the above-mentioned media not only cause huge economic losses to the oil field, but also have serious social consequences. For this reason, much research work has been carried out on the corrosion and protection against CO2, H2S and Cl "at home and abroad and many positive application effects have been achieved, in which the use of the modified 13Cr and 22Cr duplex stainless steel having a high Cr (Mo, Ni) content is considered as an ideal material for corrosion resistance. However, the stainless steel material contains a large amount of strategic elements such as Cr, Ni or Ti, which are equivalent to expensive elements, so that the cost of the steel pipe is greatly increased, and the wide use of the stainless steel material in oil and gas fields is limited. Therefore, each oil and gas field needs an 'economical' corrosion-resistant oil casing pipe to meet the production requirement. A large number of experimental researches prove that the series of products have good CO2, H2S and Cl-corrosion resistance, and meanwhile, due to the selection of aluminum alloy elements, the production and manufacturing costs of the products are reduced, so that the oil casing is an economic non-API series oil casing product with moderate price. In addition, other stricter quality control is carried out when the oil casing pipe is produced, so that the stability of the product performance is ensured. Meanwhile, the whole oil well column adopting the steel pipe is high in whole weight, which is extremely unfavorable for the exploitation of the extended reach well (deep well and ultra-deep well), and the exploitation difficulty of the extended reach well can be reduced to the maximum extent by the application of the lightweight aluminum alloy material. The screwing matching of the aluminum alloy special threaded pipe and the coupling is different from the traditional steel pipe which must use screw thread oil, lead contained in the screw thread oil is harmful to human bodies, and the lead inevitably falls on the ground in the screwing process to cause pollution to the environment.
Disclosure of Invention
The invention aims to provide the high-strength corrosion-resistant aluminum alloy special threaded oil well pipe aiming at the defects in the prior art, the oil well pipe is manufactured by adopting the aluminum alloy pipe, the inner wall and the outer wall of the oil well pipe are smooth, the wall thickness of the oil well pipe is uniform, the oil well pipe is simpler to process and manufacture than a martensitic stainless steel pipe, has the characteristics of high strength, corrosion resistance, light weight and the like, is matched with a specially designed aluminum alloy special thread, and has the service performance and the cost which are more suitable for the market requirement of the oil well pipe.
The invention provides a high-strength corrosion-resistant aluminum alloy special threaded oil well pipe, which adopts the technical scheme that: the aluminum alloy pipe comprises an aluminum alloy pipe (1) and an aluminum alloy coupling (2), wherein an external thread (1-1) is processed on the outer end outer surface of the aluminum alloy pipe (1), an internal thread (2-1) is processed on the inner wall of the end part of the aluminum alloy coupling (2), a raised torque step (2-3) is arranged between the internal threads (2-1) at two ends of the aluminum alloy coupling (2), a conical inner sealing surface (2-2) is arranged at the rear end of the internal thread (2-1) of the coupling, an outer sealing surface is designed at the outer end of the external thread of the pipe (1), and the outer sealing surface is matched with the conical inner sealing surface (2-2).
Preferably, the outer end of the external thread of the aluminum alloy pipe (1) is provided with a first outer sealing surface (1-4) with an arc R1, the part close to the torque step (2-3) is provided with a second outer sealing surface (1-5) with an arc R2, and the two arcs of the first outer sealing surface (1-4) and the second outer sealing surface (1-5) form a complete outer sealing surface.
Preferably, the external thread (1-1) of the aluminum alloy pipe (1) adopts a conical structure, the internal thread (2-1) of the aluminum alloy coupling (2) adopts a conical structure, and the external thread (1-1) and the internal thread (2-1) are matched with each other.
Preferably, the height of the torque step (2-3) in the aluminum alloy coupling (2) is matched with the thickness of the pipe wall of the aluminum alloy pipe (1), so that the outer wall surface of the torque step (2-3) and the inner wall of the aluminum alloy pipe (1) form a stepless pipeline.
Preferably, after the external thread (1-1) and the internal thread (2-1) are buckled, the conical inner sealing surface (2-2) and the circular arc-shaped outer sealing surface generate interference fit.
Preferably, the outer side of the external thread (1-1) is provided with a thread starting button (1-2), and the outer side of the thread starting button (1-2) is provided with a nose end (1-3).
Preferably, the threads and the sealing surfaces of the aluminum alloy pipe (1) and the aluminum alloy coupling (2) are subjected to surface treatment, and the surface-treated material is sprayed at high speed to the threads and the sealing surfaces by forming a high-speed spray beam using compressed air as power to form an aluminum oxide film.
Preferably, the surface treatment spray is a ceramic spray.
Compared with the prior art, the invention has the following beneficial effects:
the invention is made of aluminum alloy materials, the weight is small, the whole weight of the well column is reduced, and the exploitation cost of the extended reach well is reduced; in addition, the aluminum alloy material is corrosion-resistant and shear-resistant, the special sealing design can reduce the oil extraction cost of a well containing carbon dioxide, hydrogen sulfide and chloride ions to corrode an oil well while the service life of the well column is ensured, screw thread oil is not needed for screwing the aluminum alloy pipe and the aluminum alloy coupling, the environmental pollution caused by the dripping of the screw thread oil is avoided, in addition, the sealing surface is small in excessive matching due to the special sealing structure, the inner wall of the screwed pipe is well matched with the coupling through hole, the inner wall has no step, the turbulent flow phenomenon is avoided when a medium flows, the energy loss is small, and the oil extraction cost can be reduced to a certain extent; the threads and the sealing surface are cleaned by Sa2.5-level surfaces, so that the surface compactness and the corrosion resistance of the connecting part are improved, the anti-thread sticking performance is improved, and the service performance is ensured to the greatest extent.
Drawings
FIG. 1 is a schematic view of the overall installation of the present invention;
FIG. 2 is an enlarged schematic view of an end of an aluminum alloy pipe at detail A;
FIG. 3 is an enlarged schematic view of an aluminum alloy coupling at detail B;
FIG. 4 is an enlarged fragmentary schematic view of a sealing surface;
FIG. 5 is a schematic view of the present invention in operation and with an enlarged view of a portion of the thread;
FIG. 6 is a typical static pitting topography for CO2 corrosion;
in the upper diagram: the aluminum alloy pipe comprises an aluminum alloy pipe 1, an aluminum alloy coupling 2, external threads 1-1, a thread starting buckle 1-2, a nose end 1-3, a first outer sealing surface 1-4, a second outer sealing surface 1-5, internal threads 2-1, a conical inner sealing surface 2-2 and a torque step 2-3.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The outer end of the external thread of the aluminum alloy pipe 1 is provided with a first outer sealing surface 1-4 with an arc R1, the part close to the torque step 2-3 is provided with a second outer sealing surface 1-5 with an arc R2, and the two sections of arcs of the first outer sealing surface 1-4 and the second outer sealing surface 1-5 form a complete outer sealing surface.
The external thread 1-1 of the aluminum alloy pipe 1 is of a conical structure, the internal thread 2-1 of the aluminum alloy coupling 2 is of a conical structure, and the external thread 1-1 and the internal thread 2-1 are matched with each other.
The height of the torque step 2-3 in the aluminum alloy coupling 2 is matched with the pipe wall thickness of the aluminum alloy pipe 1, so that the outer wall surface of the torque step 2-3 and the inner wall of the aluminum alloy pipe 1 form a stepless pipeline.
After the external thread 1-1 and the internal thread 2-1 are buckled, the conical inner sealing surface 2-2 and the circular arc-shaped outer sealing surface generate interference fit.
The outer side of the external thread 1-1 is provided with a thread starting buckle 1-2, the outer side of the thread starting buckle 1-2 is provided with a nose end 1-3, and the nose end has the following functions: after being matched with the aluminum alloy coupling 2, a part of thread grease can be stored at the position of the nose end, and the auxiliary sealing effect can be achieved.
The threads and the sealing surfaces of the aluminum alloy pipe 1 and the aluminum alloy coupling 2 are subjected to surface treatment, and compressed air is used as power to form a high-speed spray beam to spray the spray material subjected to surface treatment to the threads and the sealing surfaces at a high speed so as to form an aluminum oxide film. The spraying material for surface treatment adopts ceramic spraying material.
When the aluminum alloy pipe is used, the aluminum alloy pipe 1 and the aluminum alloy coupling 2 are screwed into a whole through the screwing machine, and the inner wall of the screwed aluminum alloy pipe 1 is connected with the through hole in the aluminum alloy coupling 2 to form a stepless pipeline; after the external thread 1-1 and the internal thread 2-1 are buckled, the conical inner sealing surface 2-2, the first outer sealing surface 1-4 and the second outer sealing surface 1-5 are in interference fit, when the pipeline is in work, an oil-gas medium rises to a well head through the inner wall of the pipeline, and the special sealing design can ensure reliable sealing; the stability of the well column can be ensured by the special thread design; the use of the aluminum alloy material can ensure the corrosion resistance of the well column.
The surface treatment process of the thread and the sealing surface comprises the following steps: after the aluminum alloy pipe material is cut, compressed air is used as power to form a high-speed spray beam to spray the spray material to the threads and sealing surfaces of a coupling and a pipe at a high speed, and due to the impact and cutting action of abrasive materials on the surface of a workpiece, the surface of the workpiece obtains certain cleanliness and different roughness, so that the mechanical property of the surface of the workpiece is improved, and the fatigue resistance of the workpiece is improved. The high-speed spraying of the spraying material can accelerate the formation of an aluminum oxide film, simultaneously increase the adhesive force between a workpiece and a coating, and prolong the service life of threads and sealing surfaces. The ceramic spray material is used for ensuring the Sa2.5-level surface cleaning requirement.
The specific experimental data are as follows
The pipe body has the following properties:
note that: s.m.y.s = minimum yield strength of the tube, m.i.y.p = minimum yield strength of the interior of the tube
The connection properties were as follows:
the recommended torque is as follows:
the average corrosion rates were as follows:
FIG. 6 shows CO2 corrosion test data and pitting morphology after corrosion. L80-13Cr showed pitting at each test temperature, and P110-13Cr and YL80SS showed smooth surfaces of the corrosion samples in each state. The material is suitable for comprehensive corrosion well conditions with high CO2 content, H2S content and the like.
The results of the corrosion test with 3.5% NaCl solution are as follows:
a test coupling is corroded by 3.5% NaCl solution, local corrosion occurs to L80-13Cr after the test, and P110-13Cr and YL80SS are smooth on the surface of a corrosion sample. The material performance is suitable for comprehensive corrosion well conditions such as high CO2, H2S and the like
The H2S stress corrosion cracking resistance was performed in accordance with NACE-TM-0177 method A, i.e., soaking in solution A at saturated H2S concentration for 720 hours did not crack. And (4) leaving the factory after strictly performing H2S performance inspection.
Loading 80% SMYS in solution B (10% H2S +90% CO gas mixture) according to NACE TM 0177-2005 did not break at 720 hours.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, the technical solution according to the present invention is subject to corresponding simple modifications or equivalent changes, as far as the scope of the present invention is claimed.
Claims (8)
1. A high-strength corrosion-resistant aluminum alloy special threaded oil well pipe is characterized in that: the aluminum alloy pipe comprises an aluminum alloy pipe (1) and an aluminum alloy coupling (2), wherein an external thread (1-1) is processed on the outer end outer surface of the aluminum alloy pipe (1), an internal thread (2-1) is processed on the inner wall of the end part of the aluminum alloy coupling (2), a raised torque step (2-3) is arranged between the internal threads (2-1) at two ends of the aluminum alloy coupling (2), a conical inner sealing surface (2-2) is arranged at the rear end of the internal thread (2-1) of the coupling, an outer sealing surface is designed at the outer end of the external thread of the pipe (1), and the outer sealing surface is matched with the conical inner sealing surface (2-2).
2. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 1, wherein: the outer end of the external thread of the aluminum alloy pipe (1) is provided with a first outer sealing surface (1-4) with an arc R1, the part close to the torque step (2-3) is provided with a second outer sealing surface (1-5) with an arc R2, and the two arcs of the first outer sealing surface (1-4) and the second outer sealing surface (1-5) form a complete outer sealing surface.
3. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 1, wherein: the external thread (1-1) of the aluminum alloy pipe (1) is of a conical structure, the internal thread (2-1) of the aluminum alloy coupling (2) is of a conical structure, and the external thread (1-1) and the internal thread (2-1) are matched with each other.
4. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 1 or 3, wherein: the height of the torque step (2-3) in the aluminum alloy coupling (2) is matched with the wall thickness of the aluminum alloy pipe (1), so that the outer wall surface of the torque step (2-3) and the inner wall of the aluminum alloy pipe (1) form a stepless pipeline.
5. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 1, wherein: after the external thread (1-1) and the internal thread (2-1) are buckled, the conical inner sealing surface (2-2) and the circular arc-shaped outer sealing surface generate interference fit.
6. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 1, 3 or 5, wherein: the outer side of the external thread (1-1) is provided with a thread starting button (1-2), and the outer side of the thread starting button (1-2) is provided with a nose end (1-3).
7. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 1, wherein: the threads and the sealing surfaces of the aluminum alloy pipe (1) and the aluminum alloy coupling (2) are subjected to surface treatment, and compressed air is used as power to form high-speed spray beams to spray the surface-treated spray materials to the threads and the sealing surfaces at high speed so as to form an aluminum oxide film.
8. The high-strength corrosion-resistant aluminum alloy special threaded oil well pipe as claimed in claim 7, wherein: the spraying material for surface treatment adopts ceramic spraying material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011563644.3A CN112554810A (en) | 2020-12-25 | 2020-12-25 | High-strength corrosion-resistant aluminum alloy special threaded oil well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011563644.3A CN112554810A (en) | 2020-12-25 | 2020-12-25 | High-strength corrosion-resistant aluminum alloy special threaded oil well pipe |
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| Publication Number | Publication Date |
|---|---|
| CN112554810A true CN112554810A (en) | 2021-03-26 |
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| CN202011563644.3A Pending CN112554810A (en) | 2020-12-25 | 2020-12-25 | High-strength corrosion-resistant aluminum alloy special threaded oil well pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306319A (en) * | 2022-06-27 | 2022-11-08 | 大庆西姆莱斯石油专用管制造有限公司 | Nano-coating high-strength anti-thread gluing anti-eccentric wear special threaded oil pipe |
| CN115370300A (en) * | 2022-07-12 | 2022-11-22 | 大庆西姆莱斯石油专用管制造有限公司 | Nano-coating high-strength anti-galling anti-eccentric wear anti-corrosion anti-fouling special threaded oil pipe |
-
2020
- 2020-12-25 CN CN202011563644.3A patent/CN112554810A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306319A (en) * | 2022-06-27 | 2022-11-08 | 大庆西姆莱斯石油专用管制造有限公司 | Nano-coating high-strength anti-thread gluing anti-eccentric wear special threaded oil pipe |
| CN115370300A (en) * | 2022-07-12 | 2022-11-22 | 大庆西姆莱斯石油专用管制造有限公司 | Nano-coating high-strength anti-galling anti-eccentric wear anti-corrosion anti-fouling special threaded oil pipe |
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