CN114991686A - Wear-resistant erosion-resistant oil pipe nipple for underground fracturing and preparation method thereof - Google Patents
Wear-resistant erosion-resistant oil pipe nipple for underground fracturing and preparation method thereof Download PDFInfo
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- CN114991686A CN114991686A CN202210717369.9A CN202210717369A CN114991686A CN 114991686 A CN114991686 A CN 114991686A CN 202210717369 A CN202210717369 A CN 202210717369A CN 114991686 A CN114991686 A CN 114991686A
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 75
- 210000002445 nipple Anatomy 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 133
- 239000011248 coating agent Substances 0.000 claims abstract description 92
- 238000000576 coating method Methods 0.000 claims abstract description 92
- 238000000498 ball milling Methods 0.000 claims abstract description 76
- 239000006229 carbon black Substances 0.000 claims abstract description 56
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000002131 composite material Substances 0.000 claims abstract description 41
- 239000000945 filler Substances 0.000 claims abstract description 32
- 230000008878 coupling Effects 0.000 claims abstract description 29
- 238000010168 coupling process Methods 0.000 claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 claims abstract description 29
- 239000000956 alloy Substances 0.000 claims abstract description 28
- 238000004372 laser cladding Methods 0.000 claims abstract description 27
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 25
- 229910052742 iron Inorganic materials 0.000 claims abstract description 22
- 230000005291 magnetic effect Effects 0.000 claims abstract description 20
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 40
- 238000005245 sintering Methods 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 16
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000011261 inert gas Substances 0.000 claims description 11
- 239000011812 mixed powder Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
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- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000007865 diluting Methods 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000005253 cladding Methods 0.000 description 34
- 238000000034 method Methods 0.000 description 32
- 230000008569 process Effects 0.000 description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 14
- 229910001069 Ti alloy Inorganic materials 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 229910052786 argon Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000011056 performance test Methods 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
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- 238000012360 testing method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 244000137852 Petrea volubilis Species 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000007935 neutral effect Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003181 co-melting Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
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- 239000012895 dilution Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
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- 238000004381 surface treatment Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Images
Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of oil pipe short sections, and particularly relates to a wear-resistant erosion-resistant oil pipe short section for underground fracturing and a preparation method thereof. The oil pipe nipple comprises an oil pipe nipple body, an oil pipe coupling, a first wear-resistant and erosion-resistant coating, a second wear-resistant and erosion-resistant coating, a first prefabricated wrench bayonet and a second prefabricated wrench bayonet; the wear-resistant erosion-resistant coating is prepared by adopting an ultra-high-speed laser cladding technology and is cladded on the outer wall of the pipe nipple body and the outer wall of the oil pipe coupling; the wear-resistant erosion-resistant coating alloy powder consists of iron-based alloy powder and wear-resistant filler, the wear-resistant filler takes TiN powder, MgO powder and magnetic carbon black powder as raw materials, the TiN powder and the MgO powder are uniformly mixed in a ball milling mode to prepare TiN-MgO composite powder, and the TiN-MgO composite powder and the magnetic carbon black powder are mixed in a ball milling mode to finally obtain the TiN-MgO-magnetic carbon black composite powder, so that the wear-resistant erosion-resistant performance of the prepared coating is effectively improved.
Description
Technical Field
The invention relates to the technical field of oil pipe short sections, in particular to a wear-resistant erosion-resistant oil pipe short section for underground fracturing and a preparation method thereof.
Background
After the oil well is produced to a certain stage, the productivity and permeability are reduced, and in order to enhance the oil discharge capacity and increase the oil well yield, a hydraulic jet fracturing process is usually adopted to artificially crack the stratum, improve the flowing environment of oil in the underground and increase the oil well yield. During the fracturing and backflow processes, high-speed sand liquid can cause serious erosion to a pipe section between a hydraulic spray gun and a lower packer, when the pipe column is lifted out of a well, the pipe section and the packer are found to be pierced by the sand liquid to form grooves with different depths, and the packer and the pipe column are found to be pierced on the individual well. The result caused by the method can not meet the technical requirement of the separate-layer fracturing, the pipe column is seriously damaged, and the risk of accidents that the pipe column is broken and falls into the well to cause the falling of a tool into the well exists.
The oil pipe nipple is the main component of the well-descending pipe column, the replacement frequency of the oil pipe nipple is related to the continuity of the fracturing process and the number of fracturing sections, and the wear-resistant and erosion-resistant performance of the oil pipe nipple directly determines the replacement period of the oil pipe nipple. At present, no method capable of effectively improving the wear resistance and erosion resistance of the oil pipe nipple is available on the market, the traditional surface strengthening means is adopted, electroplating is gradually replaced due to high pollution, high cost and low bonding strength of thermal spraying are not applicable, and the traditional laser cladding method is very easy to cause bending deformation of a pipe body of the oil pipe nipple and deformation mismatch of internal and external threads of an oil pipe coupling due to large heat input amount of the traditional laser cladding method. Aiming at the increasingly urgent requirement of the oil pipe nipple on the aspect of wear resistance and erosion resistance, a method for effectively improving the wear resistance and erosion resistance of the oil pipe nipple is urgently needed to be developed.
Chinese patent with application number 202010391281.3 discloses a surface treatment method for a short section of a titanium alloy oil pipe, which is characterized in that the short section with required length is cut from a titanium alloy oil pipe blank, and a pipe end is processed into a threaded joint form; carrying out integral sand blasting, cleaning and degreasing treatment on the short section of the titanium alloy oil pipe in sequence; by using HF + HNO 3 The solution is used for pickling the titanium alloy oil pipe short section, and the titanium alloy oil pipe short section is cleaned after pickling; after acid cleaning, putting the titanium alloy oil pipe short section into micro-arc oxidation mixed electrolyte, and performing inner and outer surface micro-arc oxidation treatment on the titanium alloy oil pipe short section by adopting direct current pulse current; and finally, carrying out ultrasonic cleaning, drying, code spraying, packaging and warehousing on the titanium alloy oil pipe short section. A compact micro-arc oxidation ceramic coating is formed on the surface of the short section of the titanium alloy oil pipe, so that the corrosion resistance and the wear resistance of the short section are improved, galvanic corrosion between titanium alloy and dissimilar metal is avoided, and the underground service safety of the titanium alloy oil pipe is improved.
Disclosure of Invention
In order to solve the problems, the invention provides a wear-resistant erosion-resistant oil pipe nipple for underground fracturing and a preparation method thereof. The first wear-resistant erosion-resistant coating and the second wear-resistant erosion-resistant coating are prepared by adopting an ultra-high-speed laser cladding technology and are used for solving the problem that the tubing nipple is easy to erode, damage and lose efficacy in the oil field fracturing process.
The technical scheme for solving the problems is as follows:
a wear-resistant erosion-resistant oil pipe nipple for underground fracturing and a preparation method thereof are provided, wherein the oil pipe nipple comprises an oil pipe nipple body, an oil pipe coupling, a first wear-resistant erosion-resistant coating, a second wear-resistant erosion-resistant coating, a first preset wrench bayonet and a second preset wrench bayonet;
the first wear-resistant erosion-resistant coating and the second wear-resistant erosion-resistant coating are prepared by adopting an ultra-high-speed laser cladding technology, and ultra-high-speed laser cladding powder adopted by the first wear-resistant erosion-resistant coating and the second wear-resistant erosion-resistant coating consists of iron-based alloy powder and wear-resistant filler, wherein the iron-based alloy powder accounts for 85-90% of the proportion, and the wear-resistant filler accounts for 10-15% of the proportion;
the wear-resistant filler is TiN-MgO-magnetic carbon black composite powder.
Further, the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing the carbon black powder with mixed strong acid, diluting with deionized water after acid oxidation treatment, and obtaining oxidized carbon black powder after suction filtration, drying and grinding; immersing it in deionized water, adding FeCl under the protection of nitrogen 3 ·6H 2 O and FeSO 4 ·7H 2 Slowly dripping NaOH under the stirring state, adjusting the pH value of the solution, heating for reaction, washing with ethanol and deionized water, and separating and drying to obtain magnetic carbon black powder;
s2, mixing TiN powder, MgO powder and stearic acid, performing ball milling, introducing inert gas into a ball milling tank for protection, and sintering the mixed powder obtained by ball milling to obtain TiN-MgO composite powder;
and S3, mixing the magnetic carbon black powder and the TiN-MgO composite powder, performing ball milling again, introducing inert gas into a ball milling tank for protection, and obtaining the TiN-MgO-magnetic carbon black composite powder after ball milling.
The invention has the following beneficial effects:
the first wear-resistant erosion-resistant coating and the second wear-resistant erosion-resistant coating are prepared by adopting an ultrahigh-speed laser cladding technology, the ultrahigh-speed laser cladding technology has the characteristics of small heat input, low dilution rate and high cladding efficiency, the heat input quantity of the tubing nipple pipe body and the tubing coupling in the coating preparation process can be effectively reduced, the heated bending deformation of the tubing nipple pipe body and the tubing coupling is reduced, and the tight matching of the internal thread and the external thread of the tubing nipple pipe body and the tubing coupling is ensured; compared with the traditional oil pipe nipple, the wear-resistant erosion-resistant oil pipe nipple has the advantages that the service life is prolonged by more than 4 times, the maximum fracturing section number of a single oil pipe nipple is increased to 8 sections/time, the replacement frequency of the oil pipe nipple in the fracturing process is obviously reduced, and the fracturing efficiency is greatly improved. The wear-resistant filler takes TiN powder, MgO powder and magnetic carbon black powder as raw materials, the TiN powder and the MgO powder are uniformly mixed in a ball milling mode to prepare TiN-MgO composite powder, and then the TiN-MgO composite powder and the magnetic carbon black powder are mixed in a ball milling mode to finally obtain the TiN-MgO-magnetic carbon black composite powder, so that the wear-resistant and erosion-resistant performance of the prepared coating is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the wear-resistant and erosion-resistant oil pipe nipple of the present invention.
The parts in the drawings are numbered as follows: 1. a tubing coupling; 2. a first wear resistant erosion resistant coating; 3. a first preset wrench bayonet; 4. an oil pipe nipple pipe body; 5. a second wear resistant erosion resistant coating; 6. and a second preset wrench bayonet.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The carbon black powder used in the present invention was purchased from Hebei ink Yu chemical Co., Ltd, metallurgical carbon black.
Example 1
An abrasion-resistant erosion-resistant oil pipe nipple for underground fracturing and a preparation method thereof are disclosed, and as shown in figure 1, the oil pipe nipple comprises an oil pipe nipple pipe body 4, an oil pipe coupling 1, a first abrasion-resistant erosion-resistant coating 2, a second abrasion-resistant erosion-resistant coating 5, a first preset wrench bayonet 3 and a second preset wrench bayonet 6.
The first wear-resistant erosion-resistant coating 2 and the second wear-resistant erosion-resistant coating 5 are prepared by adopting an ultra-high-speed laser cladding technology, and the ultra-high-speed laser cladding powder adopted by the first wear-resistant erosion-resistant coating 2 and the second wear-resistant erosion-resistant coating 5 consists of iron-based alloy powder and wear-resistant filler, wherein the iron-based alloy powder accounts for 85-90% of the mixture ratio, and the wear-resistant filler accounts for 10-15% of the mixture ratio.
Wherein, the wear-resistant filler TiN-MgO-magnetic carbon black composite powder.
Wherein, the outer wall of the tubing nipple pipe body 4 and the outer wall of the tubing coupling 1 are coated with a first wear-resistant and erosion-resistant coating 2 and a second wear-resistant and erosion-resistant coating 5.
The preparation method of the wear-resistant filler comprises the following steps:
s1, mixing carbon black powder with strong acid (concentrated H) 2 SO 4 : concentrated HNO 3 1:3, v/v), heating to 50 ℃, performing ultrasonic dispersion for 2 hours under the conditions of 400w and 20kHz pulse ultrasonic waves, heating to 110 ℃ for reaction for 1 hour, performing acid oxidation treatment, diluting with deionized water, performing suction filtration with a Brinell suction filtration device, performing suction filtration for multiple times with deionized water until the filtrate is neutral, drying for 24 hours in a vacuum drying oven at 80 ℃, and grinding to obtain oxidized carbon black powder; immersing the carbon black powder into deionized water, and oxidizing the carbon black powder according to the mass ratio under the protection of nitrogen: FeCl 3 ·6H 2 O：FeSO 4 ·7H 2 O is in the ratio of 1:1:1.2, FeCl is added 3 ·6H 2 O and FeSO 4 ·7H 2 Slowly dripping NaOH (0.2moL/L) under the stirring state, adjusting the pH value of the solution to 11.0, quickly heating to 70 ℃, continuously stirring for 4 hours, washing with ethanol and deionized water after heating reaction to remove impurities, separating under the action of a magnet, drying in a vacuum drying oven at 100 ℃ for 3 hours, and drying to obtain magnetic carbon black powder;
s2, mixing TiN powder and MgO powder according to the mass ratio of 1:1, performing ball milling, and introducing inert gas (high-purity argon) into a ball milling tank for protection; specifically, during ball milling, the mixed powder and a grinding ball with the diameter of 10mm are put into a ball milling tank according to the ball-material mass ratio of 10:1, and the ball milling conditions are as follows: 750r/min, and ball milling for 36 h; after the ball milling is finished, sintering the mixed powder obtained by the ball milling, wherein the sintering conditions are as follows: heating to 1400 ℃ at the heating rate of 2 ℃/min, preserving heat for 10min, and naturally cooling to obtain TiN-MgO composite powder;
s3, mixing the magnetic carbon black powder and the TiN-MgO composite powder according to the mass ratio of 1:2, then carrying out ball milling again, and introducing inert gas (high-purity argon) into a ball milling tank for protection, wherein the ball milling conditions are as follows: 300r/min, ball milling for 48h, sintering the obtained composite powder after ball milling is finished, wherein the sintering conditions are as follows: heating to 1500 ℃ at the heating rate of 5 ℃/min, and preserving heat for 20min to obtain the TiN-MgO-magnetic carbon black composite powder.
The ultra-high-speed laser cladding powder consists of iron-based alloy powder and wear-resistant filler, wherein the mixture ratio of the iron-based alloy powder to the wear-resistant filler is 90% and the mixture ratio of the wear-resistant filler to the iron-based alloy powder to the wear-resistant filler is 10%; the iron-based alloy powder comprises the following components in percentage by weight: cr: 5.1%, Mo: 4.7%, Si: 0.5%, Co: 1.3%, W: 6.72%, V: 3.1%, Mn: 0.3%, and the balance of Fe and inevitable impurities.
By adopting the formula, the wear-resistant erosion-resistant coating is cladded on the P110 oil pipe nipple with the diameter of 73mm multiplied by 2000mm by adopting the following ultra-high-speed laser cladding process and steps:
(1) and screening and purifying the iron-based alloy powder, wherein the screened particle size range is 15-65 mu m, the D50 is 33 mu m, and the fluidity is 41/100 g.
(2) And (3) polishing by using 120-mesh abrasive paper to remove oil stains and rust on the surfaces of the tubing nipple pipe body 4 and the tubing coupling 1, and then cleaning the surfaces by using non-woven fabrics dipped with alcohol or acetone.
(3) Preparing a first wear-resistant erosion-resistant coating 2 and a second wear-resistant erosion-resistant coating 5 which are 0.5mm on the surfaces of the tubing nipple pipe body 4 and the tubing coupling 1 in the step (2) by adopting ultra-high-speed laser cladding, wherein the used laser is semiconductor laser, and the process parameters are as follows: the laser power is 2100W, the diameter of a light spot is 1mm, the scanning linear velocity is 30m/min, the feed amount per rotation is 0.4mm/r, and the powder feeding speed is 35 g/min.
(4) And (3) carrying out ultrahigh-speed laser cladding on the surface of the oil pipe nipple at a proper position in the step (3) to stack a 2Cr18Ni coating with the length of 40mm and the thickness of 2.5mm, and grinding two sides of the 2Cr18Ni coating by using a handheld grinder or an angle grinder to be flat, wherein the coating is used as a first preset wrench bayonet 3 and a second preset wrench bayonet 6, and the hardness of the 2Cr18Ni coating is HRC 21.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating has no cracks.
2) Wear resistance: the coating hardness reaches HRC 62.5.
3) Coating bonding strength: the bonding strength of the coating is 480 MPa.
4) Thermal deformation of the tubing coupling: the internal thread is 6.375mm close to the distance before cladding and 7.125mm after cladding, and the requirement of API5B standard is met.
5) Thermal deformation of the pipe body of the oil pipe nipple: the maximum deviation of the dial indicator is 0.6mm before cladding, and the maximum deviation of the dial indicator is 0.8mm after cladding, so that the use requirements are met.
6) And (5) performing a well-descending fracturing test, and abandoning after 8 sections of single fracturing.
Example 2
The ultra-high-speed laser cladding powder consists of iron-based alloy powder and wear-resistant filler, wherein the iron-based alloy powder accounts for 85% and the wear-resistant filler accounts for 15%; the iron-based alloy powder comprises the following components in percentage by weight: cr: 3.4%, Mo: 4.2%, Si: 0.7%, Co: 1.4%, W: 5%, V: 3.2%, Mn: 0.15%, and the balance of Fe and inevitable impurities.
The preparation process of the wear-resistant filler is compared with that of the embodiment 1: in step S1, the ratio of the mixed strong acid is: concentrated H 2 SO 4 : concentrated HNO 3 Heating to 65 ℃, ultrasonically dispersing for 1h, heating to 100 ℃, reacting for 40min, dropwise adding a NaOH solution, adjusting the pH value of the solution to 10.0, rapidly heating to 60 ℃, continuously stirring for 2h, and drying for 2h in a vacuum drying oven at 80 ℃; in step S2, TiN powder and MgO powder are mixed in a mass ratio of 2:1, and ball milling conditions are as follows: 500r/min, ball milling for 48h, and sintering conditions are as follows: heating to 1500 ℃ at the heating rate of 3 ℃/min,preserving the heat for 20 min; in step S3, the magnetic carbon black powder and the TiN-MgO composite powder are mixed in a mass ratio of 1:1, and the ball milling conditions are as follows: 200r/min, ball milling for 36h, wherein the sintering conditions are as follows: heating to 1200 ℃ at a heating rate of 3 ℃/min, and keeping the temperature for 25min, wherein the rest of the preparation process and the reaction conditions refer to example 1.
By adopting the formula, the wear-resistant erosion-resistant coating is cladded on the P110 oil pipe nipple with the diameter of 73mm multiplied by 2000mm by adopting the following laser cladding process and steps:
(1) and screening and purifying the iron-based alloy powder, wherein the screened particle size range is 16-65 mu m, the D50 is 34 mu m, and the fluidity is 35/100 g.
(2) And (3) polishing by using 120-mesh sand paper to remove oil stains and rust on the surfaces of the tubing nipple pipe body 4 and the tubing coupling 1, and then cleaning the surfaces by using non-woven fabrics dipped with alcohol or acetone.
(3) Preparing a first wear-resistant and erosion-resistant coating 2 and a second wear-resistant and erosion-resistant coating 5 which are 1.5mm in diameter on the surfaces of the tubing nipple pipe body 4 and the tubing coupling 1 in the step (2) by laser cladding, wherein the used laser is optical fiber laser, and the process parameters are as follows: the laser power is 1800W, the diameter of a light spot is 0.9mm, the scanning linear velocity is 25m/min, the feeding amount per rotation is 0.35mm/r, and the powder feeding speed is 20 g/min.
(4) Laser cladding is carried out on the proper position of the surface of the oil pipe nipple in the step (3) to deposit 1Cr21Ni coating with the length of 35mm and the thickness of 3mm, two sides of the 1Cr21Ni coating are ground flat by a handheld grinder or an angle grinder and used as a first preset wrench bayonet 3 and a second preset wrench bayonet 6, and the hardness of the 1Cr21Ni coating is HRC 25.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating has no cracks.
2) Wear resistance: the coating hardness reaches HRC 65.
3) Coating bonding strength: the bonding strength of the coating is 467 MPa.
4) Thermal deformation of the tubing coupling: the distance between the internal thread and the cladding is 6.725mm before cladding and 7.215mm after cladding, and the requirement of API5B standard is met.
5) Thermal deformation of the pipe body of the oil pipe nipple: the maximum deviation of the dial indicator is 0.7mm before cladding, and the maximum deviation of the dial indicator is 0.8mm after cladding, so that the use requirements are met.
The rest of the preparation is referred to example 1.
Example 3
The ultra-high-speed laser cladding powder consists of 88% of iron-based alloy powder and 12% of wear-resistant filler; the iron-based alloy powder comprises the following components in percentage by weight: cr: 6.6%, Mo: 5.9%, Si: 0.5%, Co: 0.8%, W: 7.53%, V: 1.4%, Mn: 0.4%, and the balance of Fe and inevitable impurities.
Wherein the preparation process of the wear-resistant filler is compared with that of example 1: in step S1, the ratio of the mixed strong acid is: concentrated H 2 SO 4 : concentrated HNO 3 Heating to 45 ℃, ultrasonically dispersing for 2.5h, heating to 120 ℃ for reacting for 1.5min, dropwise adding NaOH solution, adjusting the pH value of the solution to 11.0, quickly heating to 80 ℃, continuously stirring for 4.5h, and drying in a vacuum drying oven at 120 ℃ for 2 h; in step S2, TiN powder and MgO powder are mixed in a mass ratio of 1:2, and ball milling conditions are as follows: 800r/min, ball milling for 48h, and sintering conditions are as follows: heating to 1600 deg.C at a heating rate of 5 deg.C/min, and maintaining for 20 min; in step S3, the magnetic carbon black powder and the TiN-MgO composite powder are mixed in a mass ratio of 2:1, and the ball milling conditions are as follows: 400r/min, ball milling for 24h, and sintering conditions are as follows: heating to 1600 deg.C at a heating rate of 4 deg.C/min, and maintaining for 20min, wherein the rest of the preparation process and reaction conditions refer to example 1.
By adopting the formula, the wear-resistant erosion-resistant coating is cladded on the P110 oil pipe nipple with the diameter of 73mm multiplied by 2000mm by adopting the following laser cladding process and steps:
(1) and screening and purifying the iron-based alloy powder, wherein the screened particle size range is 18-61 mu m, the D50 is 36 mu m, and the flowability is 30/100 g.
(2) And (3) polishing by using 120-mesh sand paper to remove oil stains and rust on the surfaces of the tubing nipple pipe body 4 and the tubing coupling 1, and then cleaning the surfaces by using non-woven fabrics dipped with alcohol or acetone.
(3) Preparing a first wear-resistant and erosion-resistant coating 2 and a second wear-resistant and erosion-resistant coating 5 which are 1.5mm in diameter on the surfaces of the tubing nipple pipe body 4 and the tubing coupling 1 in the step (2) by laser cladding, wherein the used laser is optical fiber laser, and the process parameters are as follows: the laser power is 2300W, the diameter of a light spot is 1.8mm, the scanning linear velocity is 40m/min, the feed per revolution is 0.5mm/r, and the powder feeding speed is 50 g/min.
(4) Laser cladding is carried out on the appropriate position of the surface of the oil pipe nipple in the step (3) to deposit a 1Cr21Ni coating with the length of 35mm and the thickness of 3mm, two sides of the 1Cr21Ni coating are ground flat by a handheld grinder or an angle grinder and used as a first preset wrench bayonet 3 and a second preset wrench bayonet 6, and the hardness of the 1Cr21Ni coating is HRC 25.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating is crack-free.
2) Wear resistance: the coating hardness reaches HRC 61.
3) Coating bonding strength: the coating bonding strength is 460 MPa.
4) Thermal deformation of the tubing coupling: the internal thread is 5.215mm before cladding and 5.975mm after cladding, and the requirement of API5B standard is met.
5) Thermal deformation of the pipe nipple of the oil pipe: the maximum deviation of the dial indicator is 0.7mm before cladding, and the maximum deviation of the dial indicator is 0.9mm after cladding, so that the use requirements are met.
The rest of the preparation is referred to example 1.
Comparative example 1
Compared with the embodiment 1, in the preparation process of the wear-resistant filler, the carbon black powder is not treated, and the rest preparation process refers to the embodiment 1, and the specific preparation process is as follows:
the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing TiN powder and MgO powder according to the mass ratio of 1:1, then carrying out ball milling, and introducing inert gas (high-purity argon) into a ball milling tank for protection; specifically, during ball milling, the mixed powder and a grinding ball with the diameter of 10mm are put into a ball milling tank according to the ball-material mass ratio of 10:1, and the ball milling conditions are as follows: 750r/min, and ball milling for 36 h; after the ball milling is finished, sintering the mixed powder obtained by the ball milling, wherein the sintering conditions are as follows: heating to 1400 ℃ at the heating rate of 2 ℃/min, preserving heat for 10min, and naturally cooling to obtain TiN-MgO composite powder;
s2, mixing the carbon black powder and the TiN-MgO composite powder according to the mass ratio of 1:2, then carrying out ball milling again, and introducing inert gas (high-purity argon) into a ball milling tank for protection, wherein the ball milling conditions are as follows: 300r/min, ball milling for 48h, sintering the obtained composite powder after ball milling is finished, wherein the sintering conditions are as follows: heating to 1500 ℃ at the heating rate of 5 ℃/min, and preserving heat for 20min to obtain the TiN-MgO-carbon black composite powder.
The rest of the preparation is referred to example 1.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating is crack-free.
2) Wear resistance: the coating hardness reaches HRC 55.
3) Coating bonding strength: the bonding strength of the coating is 437 MPa.
4) Thermal deformation of the tubing coupling: the distance between the internal thread and the cladding is 6.245mm before cladding and 6.975mm after cladding, and the requirement of API5B standard is met.
5) Thermal deformation of the pipe body of the oil pipe nipple: the maximum deviation of the dial indicator is 0.8mm before cladding, and the maximum deviation of the dial indicator is 0.9mm after cladding, so that the use requirements are met.
The rest of the preparation is referred to example 1.
Comparative example 2
Compared with the embodiment 1, in the preparation process of the wear-resistant filler, no carbon black is added, only TiN-MgO composite powder is added, and the rest of the preparation process refers to the embodiment 1, and the specific preparation process is as follows:
the preparation method of the wear-resistant filler comprises the following steps:
mixing TiN powder and MgO powder according to the mass ratio of 1:1, performing ball milling, and introducing inert gas (high-purity argon) into a ball milling tank for protection; specifically, during ball milling, the mixed powder and a grinding ball with the diameter of 10mm are put into a ball milling tank according to the ball material mass ratio of 10:1, and the ball milling conditions are as follows: 750r/min, and ball milling for 36 h; after the ball milling is finished, sintering the mixed powder obtained by the ball milling, wherein the sintering conditions are as follows: heating to 1400 ℃ at the heating rate of 2 ℃/min, preserving the heat for 10min, and naturally cooling to obtain the TiN-MgO composite powder.
The rest of the preparation is referred to example 1.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating is crack-free.
2) Wear resistance: the coating hardness reaches HRC 52.
3) Coating bonding strength: the bonding strength of the coating is 440 MPa.
4) Thermal deformation of tubing coupling: the internal thread is 5.445mm before cladding and 5.965mm after cladding, and the requirement of API5B standard is met.
5) Thermal deformation of the pipe body of the oil pipe nipple: the maximum deviation of the dial indicator is 0.7mm before cladding, and the maximum deviation of the dial indicator is 0.9mm after cladding, so that the use requirements are met.
The rest of the preparation is referred to example 1.
Comparative example 3
In comparison with example 1, only carbon black powder was added during the preparation of the abrasion resistant filler, and the rest of the preparation was referred to example 1.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating is crack-free.
2) Wear resistance: the coating hardness reaches HRC 48.
3) Coating bonding strength: the coating bonding strength was 418 MPa.
4) Thermal deformation of the tubing coupling: the internal thread is 6.725mm before cladding and 14.225mm after cladding, and the requirements of API5B standard are not met.
5) Thermal deformation of the pipe nipple of the oil pipe: the maximum deviation of the dial indicator is 0.7mm before cladding, and the maximum deviation of the dial indicator is 4.3mm after cladding, which does not meet the use requirements.
The rest of the preparation is referred to example 1.
Comparative example 4
Compared with the embodiment 1, in the preparation process of the wear-resistant filler, the TiN-MgO composite powder is replaced by WC-MgO composite powder, and the specific preparation process is as follows:
the preparation method of the wear-resistant filler comprises the following steps:
s1, mixing carbon black powder with strong acid (concentrated H) 2 SO 4 : concentrated HNO 3 1:3, v/v), heating to 55 ℃, performing ultrasonic dispersion for 2 hours under the conditions of 400w and 20kHz pulse ultrasonic waves, heating to 110 ℃ for reaction for 1 hour, performing acid oxidation treatment, diluting with deionized water, performing suction filtration with a Brinell suction filtration device, performing suction filtration for multiple times with deionized water until the filtrate is neutral, drying for 24 hours in a vacuum drying oven at 80 ℃, and grinding to obtain oxidized carbon black powder; immersing it in deionized water, adding FeCl under the protection of nitrogen 3 ·6H 2 O and FeSO 4 ·7H 2 Slowly dripping NaOH (0.5moL/L) under the stirring state, adjusting the pH value of the solution to be 11.0, quickly heating to 70 ℃, continuously stirring for 4 hours, washing with ethanol and deionized water after heating reaction to remove impurities, separating under the action of a magnet, drying in a vacuum drying oven at 100 ℃ for 3 hours, and drying to obtain magnetic carbon black powder;
s2, mixing WC powder and MgO powder according to the mass ratio of 1:1, performing ball milling, and introducing inert gas (high-purity argon) into a ball milling tank for protection; specifically, during ball milling, the mixed powder and a grinding ball with the diameter of 10mm are put into a ball milling tank according to the ball-material mass ratio of 10:1, and the ball milling conditions are as follows: 750r/min, and ball milling for 36 h; after the ball milling is finished, sintering the mixed powder obtained by the ball milling, wherein the sintering conditions are as follows: heating to 1400 ℃ at the heating rate of 2 ℃/min, preserving the heat for 10min, and naturally cooling to obtain WC-MgO composite powder;
s3, mixing the magnetic carbon black powder and the WC-MgO composite powder according to the mass ratio of 1:2, then carrying out ball milling again, and introducing inert gas (high-purity argon) into a ball milling tank for protection, wherein the ball milling conditions are as follows: 300r/min, ball milling for 48h, sintering the obtained composite powder after ball milling is finished, wherein the sintering conditions are as follows: heating to 1500 ℃ at the heating rate of 5 ℃/min, and preserving heat for 20min to obtain the WC-MgO-magnetic carbon black composite powder.
Statistics and performance tests are carried out on the wear-resistant erosion-resistant oil pipe nipple cladded by the method, and the results are as follows:
1) the coating has no cracks.
2) Wear resistance: the coating hardness reaches HRC 58.
3) Coating bonding strength: the bonding strength of the coating is 450 MPa.
4) Thermal deformation of the tubing coupling: the internal thread is 6.225mm before cladding and 6.875mm after cladding, and the requirements of API5B standard are met.
5) Thermal deformation of the pipe body of the oil pipe nipple: the maximum deviation of the dial indicator is 0.7mm before cladding, and the maximum deviation of the dial indicator is 0.8mm after cladding, so that the use requirements are met.
The rest of the preparation is referred to example 1.
The test results of examples 1-3 and comparative examples 1-2 and 4 can be found to meet the use requirements, and the comparison of the test results of comparative example 1 and example 1 can be found to reduce the bonding strength of the coating under the condition that the carbon black is not subjected to magnetic treatment, probably because the surface of the carbon black contains ferromagnetic substances after the magnetic treatment, the ferromagnetic substances carried in the cladding process can be better fused with the cladding substrate, so that the bonding strength of the coating is enhanced; the test result of the comparative example 3 shows that when only carbon black powder is added as the wear-resistant filler, the bonding strength of the coating hardness meter is reduced, and the thermal deformation amount of the tubing coupling and the thermal deformation amount of the tubing nipple body do not meet the requirements, so that if only carbon black powder is added, the carbon black powder cannot be well fused with alloy powder and a base material in the cladding process, the relevant performance of the prepared coating is reduced.
In the invention, TiN has higher hardness and good wear resistance as a hard phase in the preparation of the ultrahigh-speed laser cladding powder, in the prior art, the metal Co can effectively improve the toughness of the alloy material, so the application is wider, but the characteristics of low Co melting point, easy softening at high temperature and high chemical property influence the hardness and corrosion resistance of the alloy material, in addition, in recent years, the cobalt resource is in shortage, the source is unstable and the price is higher, therefore, in the invention, MgO powder is used for replacing the metal Co, the price of MgO is lower than that of cobalt, and the MgO has corrosion resistance, high-temperature stability and higher toughness, so the alloy material can be effectively improvedThe comprehensive performance of gold is that TiN powder and MgO powder are mixed in a ball milling mode to prepare TiN-MgO composite powder, in the process of preparing the TiN-MgO composite powder, in order to control the reaction degree in the ball milling process, the rotating speed, the ball-to-material ratio and the ball milling time of ball milling are optimized on one hand, and stearic acid is added into the TiN-MgO composite powder as a process control agent on the other hand, so that the powder granularity is further refined, the powder is prevented from being adhered to walls, and the powder granularity uniformity is improved; in order to further improve the fluidity of the prepared composite powder, the magnetic carbon black powder is introduced into the invention, and the carbon black powder is mixed with mixed strong acid, dispersed in deionized water after acid oxidation treatment and FeCl 3 ·6H 2 O and FeSO 4 ·7H 2 And O, heating and reacting under an alkaline condition, separating and drying to obtain magnetic carbon black powder, and then ball-milling and mixing the magnetic carbon black powder and the obtained TiN-MgO composite powder to finally obtain the TiN-MgO-magnetic carbon black composite powder. Carbon atoms in the carbon black particles are arranged in a two-dimensional ordered layer plane formed by hexagonal planes in a net shape, and the carbon black particles have good fluidity because torsion and translation can occur between layers, and meanwhile, ferromagnetic substances are utilized to modify the carbon black powder to obtain magnetic carbon black powder; in addition, when the prepared TiN-MgO-magnetic carbon black composite powder is mixed with iron-based alloy powder, the prepared TiN-MgO-magnetic carbon black composite powder can uniformly cover the surfaces of alloy powder particles, so that the flowability and operability of the metal alloy powder are improved, and the coating has good adaptability.
According to the invention, the first wear-resistant erosion-resistant coating 2 and the second wear-resistant erosion-resistant coating 5 are prepared by adopting an ultrahigh-speed laser cladding technology, so that the heat input quantity of the tubing nipple pipe body and the tubing coupling in the coating preparation process can be effectively reduced, the heating bending deformation of the tubing nipple pipe body and the tubing coupling is reduced, and the tight matching of the internal thread and the external thread of the tubing nipple pipe body and the tubing coupling is effectively ensured.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The wear-resistant erosion-resistant oil pipe nipple for underground fracturing and the preparation method thereof are characterized in that the oil pipe nipple comprises an oil pipe nipple pipe body (4), an oil pipe coupling (1), a first wear-resistant erosion-resistant coating (2), a second wear-resistant erosion-resistant coating (5), a first preset wrench bayonet (3) and a second preset wrench bayonet (6);
the first wear-resistant erosion-resistant coating (2) and the second wear-resistant erosion-resistant coating (5) are prepared by adopting an ultrahigh-speed laser cladding technology, and ultrahigh-speed laser cladding powder adopted by the first wear-resistant erosion-resistant coating (2) and the second wear-resistant erosion-resistant coating (5) consists of iron-based alloy powder and wear-resistant filler, wherein the iron-based alloy powder accounts for 85-90% and the wear-resistant filler accounts for 10-15% of the mixture ratio;
the wear-resistant filler is TiN-MgO-magnetic carbon black composite powder.
2. The wear-resistant and erosion-resistant tubing nipple for downhole fracturing and the preparation method thereof according to claim 1 are characterized in that the outer wall of the tubing nipple body (4) and the outer wall of the tubing coupling (1) are coated with a first wear-resistant and erosion-resistant coating (2) and a second wear-resistant and erosion-resistant coating (5).
3. The wear-resistant erosion-resistant oil pipe nipple for downhole fracturing and the preparation method thereof according to claim 1, wherein the iron-based alloy powder comprises the following chemical components in percentage by mass: cr: 3.4-6.6%, Mo: 4.2-5.9%, Si: 0.5-0.7%, Co: 0.8-1.4%, W: 5-7.53%, V: 1.4-3.2%, Mn: 0.15-0.4%, and the balance of Fe and inevitable impurities.
4. The wear-resistant and erosion-resistant oil pipe nipple for downhole fracturing and the preparation method thereof according to claim 1 are characterized in that the preparation method of the wear-resistant filler is as follows:
s1, mixing the carbon black powder with mixed strong acid, diluting with deionized water after acid oxidation treatment, and obtaining oxidized carbon black powder after suction filtration, drying and grinding; immersing it in deionized water, adding FeCl under the protection of nitrogen 3 ·6H 2 O and FeSO 4 ·7H 2 Slowly dripping NaOH under the stirring state, adjusting the pH value of the solution, heating for reaction, washing with ethanol and deionized water, and separating and drying to obtain magnetic carbon black powder;
s2, mixing TiN powder, MgO powder and stearic acid, performing ball milling, introducing inert gas into a ball milling tank for protection, and sintering the mixed powder obtained by ball milling to obtain TiN-MgO composite powder;
and S3, mixing the magnetic carbon black powder and the TiN-MgO composite powder, performing ball milling again, introducing inert gas into a ball milling tank for protection, and obtaining the TiN-MgO-magnetic carbon black composite powder after the ball milling is finished.
5. The wear-resistant erosion-resistant oil pipe nipple for downhole fracturing and the preparation method thereof according to claim 1, wherein the particle size distribution of the iron-based alloy powder is 15-65 μm, and the fluidity is 30-41 s/100 g.
6. The wear-resistant erosion-resistant oil pipe nipple for downhole fracturing and the preparation method thereof according to claim 1, wherein the ultra-high speed laser cladding technological parameters are as follows: the laser power is 1800-2300W, the diameter of a light spot is 0.9-1.8 mm, the scanning linear velocity is 25-40 m/min, the feeding amount per rotation is 0.35-0.5 mm/r, and the powder feeding speed is 20-50 g/min.
7. The wear-resistant and erosion-resistant oil pipe nipple for underground fracturing and the preparation method thereof according to claim 1, wherein the hardness of the first wear-resistant and erosion-resistant coating (2) and the second wear-resistant and erosion-resistant coating (5) is more than or equal to HRC60, and the bonding strength is more than or equal to 400 MPa.
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| CN114991686B (en) | 2023-06-16 |
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