CN113882816A - Wax-proof coating oil pipe and manufacturing method thereof - Google Patents
Wax-proof coating oil pipe and manufacturing method thereof Download PDFInfo
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- CN113882816A CN113882816A CN202111326169.2A CN202111326169A CN113882816A CN 113882816 A CN113882816 A CN 113882816A CN 202111326169 A CN202111326169 A CN 202111326169A CN 113882816 A CN113882816 A CN 113882816A
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- 238000000576 coating method Methods 0.000 title claims abstract description 30
- 239000011248 coating agent Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 claims abstract description 27
- 239000010949 copper Substances 0.000 claims abstract description 27
- 238000007747 plating Methods 0.000 claims abstract description 27
- 238000005260 corrosion Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 46
- 238000010168 coupling process Methods 0.000 claims description 44
- 238000005859 coupling reaction Methods 0.000 claims description 44
- 230000008878 coupling Effects 0.000 claims description 42
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 36
- 230000008569 process Effects 0.000 claims description 35
- 238000009713 electroplating Methods 0.000 claims description 25
- 238000007689 inspection Methods 0.000 claims description 23
- 239000001993 wax Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims 1
- 238000009991 scouring Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 46
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000005488 sandblasting Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000002699 waste material Substances 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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses an oil pipe with a wax-proof coating and a manufacturing method thereof, and relates to the technical field of oil pipe corrosion resistance. According to the invention, the oil pipe copper plating layer and the oil pipe anti-corrosion and anti-wax layer are arranged on the oil pipe, so that the anti-scouring and anti-corrosion performances of the oil pipe body can be improved through the combined action of the oil pipe copper plating layer and the oil pipe anti-corrosion and anti-wax layer, and the service life of the oil pipe body is prolonged.
Description
Technical Field
The invention relates to the technical field of oil pipe corrosion prevention, in particular to an oil pipe with a wax-proof coating and a manufacturing method thereof.
Background
In a thin oil flowing well, produced fluid flows from an oil layer to a ground pipeline along an inner hole of an oil pipe under the pressure of the oil layer.
In the process, the temperature is gradually lowered along with the closer the produced liquid is to the ground, wax in the produced liquid can be gradually separated out and condensed into blocks, and oil pipe blockage can be seriously caused.
In addition, the produced liquid also contains H2S、H2CO3And Cl-Etc., which can corrode the oil pipe. Along with liquid flow scouring, the abrasion of the oil pipe is aggravated, and the service life of the oil pipe is obviously shortened.
Therefore, a new oil pipe is urgently needed in the market for solving the technical problems existing in the prior art.
Disclosure of Invention
The invention aims to provide an oil pipe with a wax-proof coating and a manufacturing method thereof, which are used for solving the technical problems in the prior art, improving the anti-scouring and anti-corrosion performance of an oil pipe body and prolonging the service life of the oil pipe body.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses an oil pipe with a wax-proof coating, which comprises a plurality of oil pipe bodies and a plurality of coupling bodies, wherein two adjacent oil pipe bodies are connected through one coupling body, an oil pipe copper plating layer and an oil pipe corrosion and wax-proof layer are arranged in each oil pipe body, and the oil pipe copper plating layer is positioned between the oil pipe corrosion and wax-proof layer and the oil pipe bodies.
Preferably, the two ends of the tubing body are provided with tubing external threads, the two ends of the coupling body are provided with coupling internal threads, and the tubing external threads are in threaded connection with the coupling internal threads.
Preferably, the external thread of the oil pipe is provided with an oil pipe copper plating layer and an oil pipe anti-corrosion and anti-wax layer;
and a coupling copper plating layer and a coupling anticorrosion and paraffin-proof layer are arranged on the coupling internal thread.
Preferably, the oil pipe anticorrosion and paraffin prevention layer and the coupling anticorrosion and paraffin prevention layer are both multilayer.
The invention also discloses a manufacturing method of the wax-proof coating oil pipe, which comprises the following steps:
s1: raw material purchasing and material inspection of the raw material;
s2: processing threads at two ends of the pipe;
s3: performing high-temperature sintering on the pipe;
s4: carrying out rust removal operation on the pipe, carrying out internal rust removal on the inner wall of the pipe, carrying out inspection after the internal rust removal is finished, repeatedly carrying out internal rust removal when the pipe is unqualified to be inspected, carrying out external rust removal on the outer wall of the pipe after the internal rust removal is finished, carrying out inspection after the external rust removal, and repeatedly carrying out external rust removal when the pipe is unqualified to be inspected;
s5: performing a pretreatment process on the pipe;
s6: carrying out an electroplating process on the pipe, and inspecting after the electroplating process;
s7: carrying out a heat treatment process on the pipe, and inspecting the pipe after the heat treatment process;
s8: spraying paint on the pipe, and then drying and airing the pipe;
s9: repeating the step of S8 for several times;
s10: and taking out the pipe and inspecting.
Preferably, after the step of S2, the threads and ports of the tubing are wiped clean with cotton yarn.
Preferably, before the step of S4, the pipe should be connected to the blaster by a sand wash guide head, which shields the threaded portion of the pipe.
Preferably, in step S5, the pretreatment process includes, in order, hanging up, immersion degreasing, water washing, flowing acid washing, flowing water washing, immersion neutralization, and hanging down.
Preferably, in step S6, the electroplating process includes, in order, plating, rinsing with running water, activating with running water, rinsing with running water, copper electroplating, rinsing with running water, and plating.
Compared with the prior art, the invention has the following technical effects:
according to the invention, the oil pipe copper plating layer and the oil pipe anti-corrosion wax-proof layer are respectively arranged on the oil pipe body, and the coupling copper plating layer and the coupling anti-corrosion wax-proof layer are arranged on the coupling body, so that the anti-scouring and anti-corrosion performances of the oil pipe body can be effectively improved, and the service life of the oil pipe body is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an installation structure of an oil pipe with a wax-proof coating according to an embodiment of the present invention;
FIG. 2 is a schematic view of a disassembled structure of an oil pipe with a wax-proof coating according to an embodiment of the present invention;
FIG. 3 is a process flow chart of a method for manufacturing an oil pipe with a wax-proof coating according to an embodiment of the present invention;
in the figure: 1-an oil pipe body; 1-oil pipe copper plating; 12-oil pipe anticorrosion and wax-proof layer; 13-oil pipe external thread; 2-a collar body; 21-coupling copper plating layer; 22-coupling anticorrosion and wax-proof layer; 23-internal threads of collar; 100-wax control coating oil pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
The invention aims to provide an oil pipe with a wax-proof coating and a manufacturing method thereof, which are used for solving the technical problems in the prior art, improving the anti-scouring and anti-corrosion performance of an oil pipe body and prolonging the service life of the oil pipe body.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, this embodiment provides a wax-proof coating tubing, which includes a plurality of tubing bodies and a plurality of coupling bodies, two adjacent tubing bodies are connected by one coupling body, the coupling bodies are connecting pieces for connecting the tubing bodies, the tubing body is provided with a tubing copper plating layer and a tubing corrosion-proof wax-proof layer, and the tubing copper plating layer is located between the tubing corrosion-proof wax-proof layer and the tubing bodies. The oil pipe copper-plated layer and the oil pipe anti-corrosion wax-proof layer which are positioned inside the oil pipe body are tubular structures, the outer wall of the oil pipe copper-plated layer is fixed on the inner wall of the oil pipe body, and the outer wall of the oil pipe anti-corrosion wax-proof layer is fixed on the inner wall of the oil pipe copper-plated layer.
During the use, this internal oil pipe copper-clad layer of oil pipe and oil pipe anticorrosion wax-proof layer can effectually resist to block that wax adheres to on oil pipe body inner wall to can improve the anti-scouring of oil pipe body, corrosion resistance, the life of extension oil pipe body.
In this embodiment, the both ends of oil pipe body are equipped with the oil pipe external screw thread, the both ends of coupling body are equipped with the coupling internal thread, the oil pipe external screw thread with coupling internal thread threaded connection, two adjacent oil pipe bodies are fixed in the both ends of coupling body through threaded connection promptly.
In this embodiment, the oil pipe external thread is provided with the oil pipe copper plating layer and the oil pipe anti-corrosion wax-proof layer, and the total length of the oil pipe copper plating layer on the oil pipe external thread and the oil pipe anti-corrosion wax-proof layer accounts for 1/3 to 2/3 of the length of the oil pipe external thread, and the oil pipe anti-corrosion wax-proof layer on the oil pipe external thread is located on the outer side of the oil pipe copper plating layer;
be equipped with on the coupling internal thread coupling copper plate with coupling anticorrosion wax prevention layer, and coupling copper plate on the coupling internal thread with the total length of coupling anticorrosion wax prevention layer accounts for 1/3 to 2/3 of coupling internal thread length, is located coupling anticorrosion wax prevention layer on the coupling internal thread and is located the inboard of coupling copper plate.
The advantage that the corresponding positions of the coupling internal thread and the oil pipe external thread are respectively provided with the copper plating layer and the anti-corrosion and anti-wax layer is that the anti-corrosion and anti-wax performance of the joint of the oil pipe body and the coupling body can be further improved.
In this embodiment, the anticorrosive wax control layer of oil pipe with the anticorrosive wax control layer of coupling is the multilayer, sets up like this and can improve anticorrosive wax control effect, and specific number of piles sets up according to actual well condition.
The embodiment also provides a manufacturing method of the wax-proof coating oil pipe, which comprises the following steps:
s1: and (4) raw material purchasing, namely purchasing the initial steel pipe, performing material inspection on the raw material, directly returning unqualified raw materials or throwing the unqualified raw materials to a waste product area, and conveying the qualified raw materials to the next process.
S2: the two ends of the pipe are processed with threads, so that preparation can be made for the subsequent electroplating process.
S3: the pipe is put into a sintering furnace to carry out high-temperature sintering action on the pipe, and the purpose of carrying out sintering action on the pipe is to carbonize oil stains on the surface of the pipe, so that impurities can be conveniently removed subsequently.
S4: carrying out rust removal operation on the pipe, carrying out internal rust removal on the inner wall of the pipe firstly, wherein the internal rust removal adopts an air compressor to blow quartz sand grains to the inner wall of the pipe, so that the technical effect of rust removal is realized, carrying out inspection after the internal rust removal is finished, and repeatedly carrying out internal rust removal after inspection is unqualified until the rust removal is finished; and then, carrying out external rust removal on the outer wall of the pipe subjected to internal rust removal, wherein the external rust removal only needs to be simply carried out by wiping or polishing, carrying out inspection after the external rust removal, repeatedly carrying out the external rust removal after the inspection is unqualified, and enabling the qualified external rust removal to enter the next flow.
Wherein, the inspection label to interior rust cleaning is:
the inner wall of the steel pipe after inner rust removal is smooth, has no floating rust, dirt, deep pits (the depth is less than or equal to 1mm), cracks, scaling, oxide skin and other impurities, the end surfaces of the inner thread and the outer thread have no damage to the threads, steel shots and dirt cannot be generated, and flat buttons, scratches and the like are avoided.
The inspection method comprises the following steps:
the inspection method is that after the self-inspection of operators is qualified, the quality inspectors carry out the sampling inspection, and the sampling inspection proportion is 20%. And (4) if the quality inspector performs spot inspection to find that the inspected batch of pipes is unqualified, judging that the derusted pipes in the batch are unqualified, and reporting to the quality inspector for inspection after the operation personnel reprocesses the qualified self-inspection.
S5: the pipe is subjected to a pretreatment process, and the effect of the pretreatment is to increase the coating effect.
S6: and (4) carrying out an electroplating process on the pipe, inspecting after the electroplating process, and entering the next process after the pipe is qualified.
S7: the pipe is subjected to a heat treatment process, the main purpose of the heat treatment process is to carry out dehydrogenation treatment on the steel pipe after electroplating (residual hydrogen ions in the electroplating process can be attached to the surface of the pipe), improve the matrix structure, solidify the coating, improve the binding force and improve the mechanical property. And inspecting the pipe after the heat treatment process.
In this embodiment, a horizontal heat treatment furnace is used for heat treatment.
And (3) performing heat treatment dehydrogenation treatment on the pipe subjected to the electroplating treatment within 72 hours, turning on a switch of one to three zones on a heat treatment furnace, adjusting a temperature knob to 200 ℃, and performing heat treatment for 120 minutes.
The inspection requirements are as follows:
5% of the total amount of the quality inspectors can be checked by sampling.
The method mainly checks whether the pipe is subjected to heat treatment in time, reaches the heat treatment temperature and keeps the temperature for a long time.
S8: and spraying the coating on the pipe, and drying and airing the pipe.
In this embodiment, the coating material includes graphene and epoxy novolac, and a person skilled in the art may select a coating of another material as needed, and the following two points need to be paid attention to when selecting the coating:
1) and inspecting paint delivery quality certificates, quality detection reports, use instructions, delivery qualification certificates and the like. Checking whether the paint package is intact, and information such as the paint model, the production date, the validity period and the like;
2) the coating properties of the paint were determined to meet the specifications of the following table before use. The performance does not meet the requirements, and the following should not be used:
surface pretreatment inspection: the electroplated pipe is subjected to visual inspection of surface quality one by using a lighting tool with the brightness of not less than 100 lm. And (5) carrying out visual comparison inspection according to the corresponding index pictures, wherein the surface cleanliness reaches the standard.
For drying care needs to be taken:
1) after the pipe is coated, the pipe is sent into a baking furnace according to the use instruction of the coating for baking. The temperature error in the hearth is controlled within +/-10 ℃.
2) According to environmental factors, the temperature of the baking oven is correspondingly adjusted, the surface characteristic change of the baked pipe coating is monitored in real time, and when unqualified products are found, relevant technicians are timely notified and the unqualified factors are checked one by one.
S9: the step S8 is repeated for a plurality of times, because the pipe in the invention needs to be provided with a plurality of anti-corrosion and anti-wax layers, a plurality of coating processes are needed;
s10: and finally, taking out the pipe, and inspecting to obtain a finished pipe after the pipe is qualified.
In this embodiment, after the step S2, the threads and the ports of the tube are wiped clean with cotton yarn to prevent the influence on the following processes.
In this embodiment, before the step S4, the pipe and the blasting machine should be connected by a sand blasting guide head (which is a common connector in the field of sand blasting), and the sand blasting guide head shields the threaded portion of the pipe to avoid damaging the screw thread during the sand blasting process. The sand washing guide head can also ensure the level of the pipe, particularly the inlet end, and when the pipe is inclined, the inlet end of the pipe is easy to damage by sand spraying.
In this embodiment, in step S5, the pretreatment process sequentially includes hanging, soaking to remove oil (soaking with XH-101B high-efficiency steel chemical degreasing powder solution), washing with water, flowing acid washing (hydrochloric acid washing for 15min), flowing water washing, soaking to neutralize (low-concentration sodium hydroxide or other weak base solution, soaking for 2min), and hanging. The pipe is hung on a running vehicle of the production line; similarly, the lower hanger is the lower production line, and the pipe is taken down from the travelling crane.
In this embodiment, in step S6, the electroplating process sequentially includes hanging up, flowing water washing, flowing activation, flowing cold water washing, copper electroplating (here, BH-963 semi-bright nickel electroplating process is used), flowing water washing (here, the technical effect of two water washes is to improve the washing effect), and hanging down.
The common fault and elimination method of the BH-963 semi-bright nickel electroplating process comprises the following steps:
in order to reduce leakage points and ensure the product percent of pass, the electroplating pretreatment needs to be strictly controlled. The smoother the inner wall of the pipe subjected to sand blasting is, the fewer the leakage points of the product after coating are, which is a basic principle.
In order to reduce rusting between the working procedures, the workshop should be well connected with the front working procedure and the rear working procedure. The basic principle is as follows: the pipe after sand blasting needs to be pretreated as soon as possible, and after the pretreatment is finished, an electroplating process needs to be carried out as soon as possible.
After the pretreatment, the steel pipe which is not plated for 1 hour or more (including 1 hour) must be inspected by a quality inspector for rusting. If rust is found before entering the next working procedure, the rust must be picked out and reprocessed.
Before the electroplating process, electroplating tools are screwed on two ends of the oil pipe, so that the outer wall of the steel pipe is prevented from being corroded by the electroplating solution, and the electroplating solution is prevented from being polluted.
In the electroplating production process, if the voltage of the plating bath exceeds 5.0V, a serious ignition phenomenon and abnormal current occur, an operator needs to check the conduction condition of the plating bath: whether the electric conduction between the copper and aluminum bars, the electric conduction between the anode rod and the electric conduction seat, the electric conduction between the carbon brush and the tube body and the like are good or the short circuit condition occurs should be timely trimmed.
In order to reduce the influence of oil stains and floating rust in the cleaning water on the product quality, various cleaning water, whether the cleaning water is pretreated or the plating water, needs to be replaced once a week. The temperature of the flowing hot water is controlled to be 30-40 ℃.
The time interval of placing the electroplating bath out of the tank is not more than 15 minutes, and high-pressure air drying is carried out in time.
An operator detects whether parameters such as temperature of each treatment liquid and drug content in the electroplating pretreatment process are in a normal range or not, and if the parameters are not in the normal range, the parameters are adjusted in time.
Whether the anode rod centering column is damaged, whether the anode rod coating is damaged, whether the anode rod has a liquid leakage phenomenon, and if the anode rod damage condition is found, an operator should immediately inform a shift or a maintenance worker to maintain, and the anode rod can not be continuously used, so that quality accidents are avoided.
The relative humidity is checked at least once every shift, and the detection is carried out once every 2h when the climate suddenly changes;
in order to prevent the oxidation, the moisture, the rust or the secondary pollution of the inner and the outer surfaces of the pipe before coating, the time interval from the spraying of the electroplated pipe to the bottom layer meets the following requirements:
| relative humidity,% | 80-90 | 50-79 | ＜50 |
| Interval time, min | ≤30 | ≤60 | ≤120 |
The coating of the bottom layer and the surface layer is preferably carried out in an environment with relative humidity less than 90%, temperature of 10-35 ℃ and good ventilation; and when the relative humidity is more than 90%, stopping the operation.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. The utility model provides a wax control coating oil pipe, includes a plurality of oil pipe body and a plurality of coupling body, adjacent two through one between the oil pipe body this body coupling, its characterized in that: the oil pipe is characterized in that an oil pipe copper plating layer and an oil pipe anti-corrosion and wax-proof layer are arranged in the oil pipe body, and the oil pipe copper plating layer is located between the oil pipe anti-corrosion and wax-proof layer and the oil pipe body.
2. The wax-resistant coated oil pipe of claim 1, wherein: the oil pipe coupling comprises an oil pipe body and is characterized in that oil pipe external threads are arranged at two ends of the oil pipe body, coupling internal threads are arranged at two ends of the coupling body, and the oil pipe external threads are in threaded connection with the coupling internal threads.
3. The wax-resistant coated oil pipe of claim 2, wherein: the external thread of the oil pipe is provided with an oil pipe copper plating layer and an oil pipe anti-corrosion and anti-wax layer;
and a coupling copper plating layer and a coupling anticorrosion and paraffin-proof layer are arranged on the coupling internal thread.
4. The wax-resistant coated oil pipe of claim 3, wherein: the oil pipe anticorrosion and paraffin prevention layer and the coupling anticorrosion and paraffin prevention layer are multiple layers.
5. A method for manufacturing an oil pipe with wax-proof coating according to any one of claims 1 to 4, comprising the steps of:
s1: raw material purchasing and material inspection of the raw material;
s2: processing threads at two ends of the pipe;
s3: performing high-temperature sintering on the pipe;
s4: carrying out rust removal operation on the pipe, carrying out internal rust removal on the inner wall of the pipe, carrying out inspection after the internal rust removal is finished, repeatedly carrying out internal rust removal when the pipe is unqualified to be inspected, carrying out external rust removal on the outer wall of the pipe after the internal rust removal is finished, carrying out inspection after the external rust removal, and repeatedly carrying out external rust removal when the pipe is unqualified to be inspected;
s5: performing a pretreatment process on the pipe;
s6: carrying out an electroplating process on the pipe, and inspecting after the electroplating process;
s7: carrying out a heat treatment process on the pipe, and inspecting the pipe after the heat treatment process;
s8: spraying paint on the pipe, and then drying and airing the pipe;
s9: repeating the step of S8 for several times;
s10: and taking out the pipe and inspecting.
6. The method of manufacturing a wax-resistant coated oil pipe of claim 5, wherein: after the step S2, the threads and ports of the tube were wiped clean with cotton yarn.
7. The method of manufacturing a wax-resistant coated oil pipe of claim 5, wherein: before the step of S4, the pipe should be connected to the blasting machine by a sand flushing guide head, which shields the threaded portion of the pipe.
8. The method of manufacturing a wax-resistant coated oil pipe of claim 5, wherein: in step S5, the pretreatment process sequentially includes hanging, soaking to remove oil, washing with water, flowing acid washing, flowing water washing, soaking to neutralize, and hanging.
9. The method of manufacturing a wax-resistant coated oil pipe of claim 5, wherein: in step S6, the plating process includes, in order, an up-hanging, a flow washing, a flow activation, a flow washing, an electrolytic copper plating, a flow washing, and an down-hanging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326169.2A CN113882816A (en) | 2021-11-10 | 2021-11-10 | Wax-proof coating oil pipe and manufacturing method thereof |
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