CN105458633B - A kind of manufacture method of mild steel coiled tubing - Google Patents
A kind of manufacture method of mild steel coiled tubing Download PDFInfo
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- CN105458633B CN105458633B CN201610003513.7A CN201610003513A CN105458633B CN 105458633 B CN105458633 B CN 105458633B CN 201610003513 A CN201610003513 A CN 201610003513A CN 105458633 B CN105458633 B CN 105458633B
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- steel band
- coiled tubing
- steel
- rollers
- manufacture method
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 112
- 239000010959 steel Substances 0.000 claims abstract description 112
- 238000005096 rolling process Methods 0.000 claims abstract description 66
- 238000003466 welding Methods 0.000 claims abstract description 51
- 239000013527 degreasing agent Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000004513 sizing Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 229910001868 water Inorganic materials 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 239000005711 Benzoic acid Substances 0.000 claims description 5
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 5
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 235000010233 benzoic acid Nutrition 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 5
- 229960004889 salicylic acid Drugs 0.000 claims description 5
- 239000011975 tartaric acid Substances 0.000 claims description 5
- 235000002906 tartaric acid Nutrition 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000003755 preservative agent Substances 0.000 claims description 4
- 230000002335 preservative effect Effects 0.000 claims description 4
- MFBOGIVSZKQAPD-UHFFFAOYSA-M sodium butyrate Chemical compound [Na+].CCCC([O-])=O MFBOGIVSZKQAPD-UHFFFAOYSA-M 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000005530 etching Methods 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000002791 soaking Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910001339 C alloy Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
Abstract
The present invention relates to a kind of manufacture method of mild steel coiled tubing, comprise the following steps：Steel band is supplied to cleaning device from feed reel, utilizes the impurity of alkaline degreaser removal steel strip surface；Steel band is set to pass through rolling device and pipe forming apparatus, to form the shape of coiled tubing；It is using method for laser welding that the butt welding of steel band is integral；Normalized treatment is carried out to weld seam, sizing processing is carried out to coiled tubing and homogeneous tube is heat-treated；Finishing and reel encapsulation are carried out to coiled tubing.According to the manufacture method of the mild steel coiled tubing of the present invention, improved from many aspects such as component, former, welding procedure and Technologies for Heating Processing, enable to produce coiled tubing incessantly, while solve the corrosion-resistant problem in working condition, have broad application prospects.The present invention is applied to the technical field of petroleum works.
Description
Technical field
The present invention relates to a kind of manufacture method of mild steel coiled tubing, suitable for the technical field of petroleum works.
Background technology
Coiled tubing (coiled tubing), also known as coiled tubing, a roll are myriametre, can replace conventional oil pipe
Carry out many operations.Continuous oil pipe operation equipment has the characteristics of Operating Pressure, continuously remove, and equipment volume is small, duty cycle
It hurry up, cost is low.Twentieth century nineties, the development that coiled tubing technology is advanced by leaps and bounds.Continuous oil pipe operation fills
Put and be described as " omnipotent working rig ", be widely used in the operations such as oil gas field well workover, drilling well, completion, well logging, run through oil gas and opened
The overall process adopted.The operating environment of coiled tubing determines that it will face serious etching problem.
The manufacture of coiled tubing is that steel band is bent into the shape of pipe in the prior art, with resistance welding (ERW) mode
Form coiled tubing.ERW, which is heated pipe abutting edge using the resistance heat of high frequency electric or high frequency electric of inducting, to be melted, and is applied
The production technology of soldering with extruding.Compared with general welding method, ERW weld seams do not use external filling metal, and heat
Speed is fast, production efficiency is high.But due to no filling metal, so weldering can not be improved by adding the method for alloying element
The combination property of seam.In addition, heating-up temperature is high in welding process, the time is short, causes welding temperature gradient big so that some steel grades
It is easy to produce hardening phase and structural stress, increases weld seam fragility, cause comprehensive mechanical property to decline.
It is inevitable trench etching problem using the maximum hidden danger of ERW manufacture coiled tubings, its essence is Local Phase
Microcell corrosion caused by electrochemistry is uneven.The origin cause of formation of trench etching is divided into internal cause and the major class of external cause two.Internal cause is primarily referred to as welding
Pipe product oneself factor, including composition, microstructure and residual stress the influence to trench etching performance.Specifically, weld
During high heat cause the alloying component of weld metal zone to be different from mother metal, so as to form corrosion cell；In ERW welding processes,
Due to the input of heat, weld metal zone and melt run can produce residual stress, the weld seam of fusing in the presence of temperature gradient field
Contraction is produced in cooling and solidification process, is plastically deformed the base metals of weld seam both sides, when whole component is cooled to room
Wen Hou, larger residual stress be present in steel, the corrosion of steel can be accelerated.External cause is primarily referred to as the use environment of coiled tubing, bag
Include medium species, composition, temperature, pressure and rate of flow of fluid etc..For example, coiled tubing is in use, have to consider in medium
The influence of the factor to trench etching performance such as carbon dioxide, hydrogen sulfide and temperature and pressure.
The another question that ERW welding methods are brought be coiled tubing inwall formed inner burr, such as certain factory life
The specification of production is Φ 38.1mm*3.2mm (diameter * wall thickness) coiled tubing, and its inner burr is highly even up to 1.8mm.Even
In continuous oil pipe, due to the appearance of inner burr, reduce its latus rectum, producing level is significantly limited, it is often necessary to unreasonably
Expand its internal diameter, cause the waste of material and cost.
Laser welding be by the use of high-energy-density laser beam as thermal source a kind of high-efficiency and precision welding method.Laser Welding
It is one of importance of Materialbearbeitung mit Laserlicht technology application to connect.It is mainly used in the 1970s welding thin-walled material and low speed
Welding, welding process category heat-conduction-type, i.e. laser emission heated partses surface, surface heat are internally spread by heat transfer,
By controlling the parameters such as laser energy, defocusing amount and speed of welding, workpiece is melted, form specific molten bath.Because it is unique
The advantages of, it has been successfully applied in micro-, miniature parts precision weldings.But because its is costly and operating condition limit
System, it is not used at present in the manufacture of coiled tubing.
A kind of manufacturer that can effectively overcome trench etching and the coiled tubing of inner burr problem is needed in the prior art
The welding procedure of method, especially coiled tubing, enable to produce coiled tubing incessantly.
The content of the invention
The present invention is intended to provide a kind of manufacture method of mild steel coiled tubing, it instead of tradition with laser welding technology
ERW welding, efficiently solve the inner burr problem and trench etching problem of coiled tubing in the prior art.Meanwhile according to
The manufacture method of the mild steel coiled tubing of the present invention, the also component from the steel band for forming coiled tubing and production technology, shaping
The many aspects such as equipment, welding procedure, heat treatment and Anticorrosion measure are improved, and enable the company of producing incessantly
Continuous oil pipe, while the coiled tubing for produce not only meets intensity requirement but also met resistance in working condition
Etching problem, have broad application prospects.
According to the manufacture method of the mild steel coiled tubing of the present invention, comprise the following steps：
(1) from the steel band of feed reel supply mild steel to cleaning device, the miscellaneous of steel strip surface is removed using alkaline degreaser
Matter；
(2) steel band is passed through rolling device, to produce preliminary deformation, be easy to be formed the shape of coiled tubing；
(3) steel band is made to pass through pipe forming apparatus, to form the shape of coiled tubing；
(4) it is using method for laser welding that the butt welding of steel band is integral；
(5) normalized treatment is carried out to weld seam, sizing processing is carried out to coiled tubing；
(6) homogeneous tube heat treatment is carried out to coiled tubing；
(7) finishing is carried out to coiled tubing and reel encapsulates.
Preferably, step is increased between step (1) and (2)：After being terminated using the cleaning of alkaline degreaser, with clear water pair
Steel strip surface carries out ultrasonic wave cleaning, to remove the degreaser on surface；Then the surface of steel band is dried up by drying blowing device.
Except increase is gone between step (4) and (5) the step of burr, outer burr is by burr removal device physical removal or outside
Smear burr and remove liquid removal in the region that burr is concentrated.In step (7), after coiled tubing finishing, in the outer of coiled tubing
Surface smear preservative, for preventing the corrosion on coiled tubing surface.
Preferably, the chemical composition in steel band is according to mass percent：C：0.05-0.09%, Mn：0.35-0.45%,
Si：0.35-0.40%, Cr：0.61-0.72%, Nb：0.021-0.024%, Mo：0.01-0.03%, P：0.012-
0.018%, S：0.002-0.005%, remaining is Fe and inevitable impurity；
The preparation process of steel band is：First, said components are smelted according to corresponding mass percent and are cast into slab；
Second, by heating of plate blank to 1300-1340 DEG C, soaking time is that 2.0-2.3 divides/millimeter, the thickness depending on slab；3rd,
Finishing temperature control scope is 820-850 DEG C；4th, it is 20-25 DEG C/s to control the cooling velocity in cooling, according to coiling temperature
To determine finally to need the temperature cooled down；5th, coiling temperature is 250-270 DEG C, batches rear natural cooling；
The spot diameter of laser welding is 2mm, bonding power 7500W, focal length 230mm, speed of welding is 1.5 meters/
Point, argon gas use during welding as protecting gas.
Preferably, alkaline degreaser is made up of sodium hydroxide, sodium carbonate, sodium metasilicate and water, the mass fraction point of each component
Not Wei sodium hydroxide 0.7%, sodium carbonate 8%, sodium metasilicate 3.5%, remaining is water；The temperature of degreaser is maintained in skimming processes
85±5℃。
Preferably, rolling device is set including the first rolling equipment, the second rolling equipment, the 3rd rolling equipment and the 4th roll-in
It is standby；First rolling equipment is the H type pressure rollers being centrally located relative to steel band, is rotated around horizontal axis, its lower edge roll-in
On steel band, the ratio of the distance between lower edge of the sidepiece of steel band and end H type pressure rollers and steel band overall width is 0.1-
0.2；Second rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of its thickness and steel band overall width is
0.6-0.8, the scope of the angle between the rolling surface of the second rolling equipment and side is 100-110 °；3rd rolling equipment
For the plate-like pressure roller being centrally located relative to steel band, the ratio of its thickness and steel band overall width is 0.4-0.5, the 3rd rolling equipment
Rolling surface and side between angle scope be 110-120 °；4th rolling equipment is to be centrally located relative to steel band
Plate-like pressure roller, the ratio of its thickness and steel band overall width is 0.2-0.3, between the rolling surface of the 4th rolling equipment and side
The scope of angle is 110-120 °.
Preferably, pipe forming apparatus includes three groups of extruding two pairs of rollers, and every group of extruding two pairs of rollers include two I-shapeds of parallel arrangement
Type edger roll, each edger roll are rotated around vertical axis, and the spacing between three groups of extruding two pairs of rollers is sequentially reduced, and steel band is successively by squeezing
Press the space between two pairs of rollers web.The width of steel band and the first ratio for extruding the distance between the web of two pairs of rollers are 1.8-2.3；
The width of steel band and the second ratio for extruding the distance between the web of two pairs of rollers are 2.5-2.8；The width of steel band and the 3rd extruding
The ratio of the distance between the web of two pairs of rollers is 3.0-3.1.
Preferably, it is to the mode of coiled tubing progress homogeneous tube heat treatment：Coiled tubing is warming up to 920 DEG C；Then enter
Row air cooling, temperature control is at 450 DEG C~470 DEG C after air cooling；Then water cooling is carried out, cooling velocity is 120 DEG C -150 DEG C/sec, water
It is cooled to room temperature.
According to the manufacture method of the mild steel coiled tubing of the present invention, inner burr problem and trench etching are efficiently solved
Problem so that what the coiled tubing produced not only met intensity requirement but also met in working condition corrosion-resistant asks
Topic, has broad application prospects.
Brief description of the drawings
Fig. 1 shows the schematic diagram of the manufacture system of the mild steel coiled tubing of the present invention.
Fig. 2 shows the first rolling equipment of the present invention.
Fig. 3 shows the second rolling equipment of the present invention.
Fig. 4 shows the 3rd rolling equipment of the present invention.
Fig. 5 shows the 4th rolling equipment of the present invention.
Fig. 6 shows the first extruding two pairs of rollers of the present invention.
Fig. 7 shows the second extruding two pairs of rollers of the present invention.
Fig. 8 shows the 3rd extruding two pairs of rollers of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
According to the manufacture method of the mild steel coiled tubing of the present invention, steel band is welded into by continuous oil by laser-beam welding machine
Pipe, the height of inner burr on coiled tubing inwall can be controlled and (can be described as " no inner burr ") within 0.3mm, while effectively
Ground solves the problems, such as trench etching, and its heat affected area is small, and reliability is high, and the scope of application is wider.For example, in above-mentioned no internal hair
Pierce in coiled tubing, combination process water pumping gas production can be carried out with plunger, solve yield 3000-15000m3/ more than d oil wells
Continuous drainage gas production problem.
Specifically, as shown in figure 1, the confession for including being sequentially arranged according to the manufacture system of the mild steel coiled tubing of the present invention
Tep reel, cleaning device, rolling device, pipe forming apparatus, laser-beam welding machine, annealing device and the reel that gathers materials.Wherein, feed reel
For supplying steel band, contain alkaline degreaser in cleaning device, for removing the impurity of steel strip surface, such as antirust coat or its
His impurity etc..Alkaline degreaser is the aqueous solution based on alkaline cleaner, and animal and plant fat is allowed into by saponification
For water-soluble soaps.This soap is surfactant, has emulsification to nonpolar mineral oil, therefore can be washed away.Roller
Pressure device is used to make steel band produce preliminary deformation in order to form the shape of coiled tubing, and pipe forming apparatus is used to make steel band shape
Into the shape of coiled tubing.Laser-beam welding machine is integral for the butt welding that will form the steel band of coiled tubing shape, finally
Form coiled tubing.Annealing device is used to be heat-treated the coiled tubing formed after welding, to optimize its mechanical property.
The reel that gathers materials is used to collect final coiled tubing finished product, and encapsulation is stand-by.
According to the manufacture method of the mild steel coiled tubing of the present invention, comprise the following steps：
(1) steel band is supplied to cleaning device from feed reel, utilize the impurity of alkaline degreaser removal steel strip surface, such as antirust
Coating or other impurities；
(2) steel band is passed through rolling device, to produce preliminary deformation, be easy to be formed the shape of coiled tubing；
(3) steel band is made to pass through pipe forming apparatus, to form the shape of coiled tubing；
(4) it is using method for laser welding that the butt welding of steel band is integral；
(5) normalized treatment is carried out to weld seam, sizing processing is carried out to coiled tubing；
(6) homogeneous tube heat treatment is carried out to coiled tubing；
(7) finishing is carried out to coiled tubing and reel encapsulates.
Preferably, step can also be increased between above-mentioned steps (1) and (2)：Terminate using the cleaning of alkaline degreaser
Afterwards, carry out ultrasonic wave to steel strip surface with clear water to clean, to remove the degreaser on surface；Then dried up by drying blowing device
The surface of steel band.
Preferably, step can also be increased between above-mentioned steps (4) and (5)：After laser welding forms coiled tubing,
Except can also increasing the step of burr, outer burr can be by burr removal device physical removal, or in outer burr collection
In region smear burr remove the chemical removal of liquid.
Preferably, in above-mentioned steps (7), after coiled tubing finishing, can also be applied in the outer surface of coiled tubing
Preservative is smeared, for preventing the corrosion on coiled tubing surface.
Steel band in the present invention uses low-carbon alloy steel, it is preferable that its chemical composition is according to mass percent：C：
0.05-0.09%, Mn：0.35-0.45%, Si：0.35-0.40%, Cr：0.61-0.72%, Nb：0.021-0.024%, Mo：
0.01-0.03%, P：0.012-0.018%, S：0.002-0.005%, remaining is Fe and inevitable impurity.Preparation process
For：First, said components are smelted according to corresponding mass percent and are cast into slab；Second, by heating of plate blank to 1300-
1340 DEG C, soaking time is that 2.0-2.3 divides/millimeter, the thickness depending on slab；3rd, finishing temperature control scope is 820-
850℃；4th, it is 20-25 DEG C/s to control the cooling velocity in cooling, determines finally to need the temperature cooled down according to coiling temperature
Degree；5th, coiling temperature is 250-270 DEG C, batches rear natural cooling.
Manufacture the embodiment 1 of the steel band of coiled tubing：
Each chemical composition in steel band is according to mass percent：C：0.05%, Mn：0.42%, Si：0.38%, Cr：
0.64%, Nb：0.022%, Mo：0.03%, P：0.012%, S：0.002%, remaining is Fe and inevitable impurity.Prepare
Process is：First, said components are smelted according to corresponding mass percent and are cast into slab；Second, heating of plate blank is arrived
1320 DEG C, the soaking time of slab is 2.0 points/millimeter；3rd, finishing temperature control scope is 846 DEG C；4th, control cooling
In cooling velocity be 20 DEG C/s, determine finally to need the temperature cooled down according to coiling temperature；5th, coiling temperature 250
DEG C, batch rear natural cooling.
Manufacture the embodiment 2 of the steel band of coiled tubing：
Each chemical composition in steel band is according to mass percent：C：0.06%, Mn：0.37%, Si：0.37%, Cr：
0.69%, Nb：0.024%, Mo：0.02%, P：0.015%, S：0.004%, remaining is Fe and inevitable impurity.Prepare
Process is：First, said components are smelted according to corresponding mass percent and are cast into slab；Second, heating of plate blank is arrived
1335 DEG C, the soaking time of slab is 2.3 points/millimeter；3rd, finishing temperature control scope is 850 DEG C；4th, control cooling
In cooling velocity be 24 DEG C/s, determine finally to need the temperature cooled down according to coiling temperature；5th, coiling temperature 265
DEG C, batch rear natural cooling.
Manufacture the embodiment 3 of the steel band of coiled tubing：
Each chemical composition in steel band is according to mass percent：
C：0.08%, Mn：0.45%, Si：0.35%, Cr：0.72%, Nb：0.023%, Mo：0.01%, P：
0.016%, S：0.003%, remaining is Fe and inevitable impurity.Preparation process is：First, by said components according to corresponding
Mass percent smelt and be cast into slab；Second, by heating of plate blank to 1340 DEG C, the soaking time of slab is 2.3 points/milli
Rice, the thickness depending on slab；3rd, finishing temperature control scope is 835 DEG C；4th, control cooling in cooling velocity be
25 DEG C/s, determine finally to need the temperature cooled down according to coiling temperature；5th, coiling temperature is 270 DEG C, naturally cold after batching
But.
By feed reel supply steel band then pass through cleaning device, to remove the impurity of steel strip surface, such as antirust coat or
Other impurities.Preferably, the alkaline degreaser in cleaning device is made up of sodium hydroxide, sodium carbonate, sodium metasilicate and water, each component
Mass fraction be respectively sodium hydroxide 0.7%, sodium carbonate 8%, sodium metasilicate 3.5%, remaining is water, degreaser in skimming processes
Temperature be maintained at 85 ± 5 DEG C.After degreasing terminates, steel band passes through the ultrasonic cleaning equipment equipped with clear water to be carried out clearly to steel strip surface
Wash, to remove the degreaser for being attached to steel strip surface.Then steel strip surface is dried up by drying blowing device.
Then steel band after over cleaning passes through rolling device, as shown in Figure 2-5, which show the roller according to the present invention
Pressure device includes the first rolling equipment as shown in Figure 2, the second rolling equipment as shown in Figure 3, the 3rd roll-in as shown in Figure 4
Equipment and the 4th rolling equipment as shown in Figure 5.Steel band is successively by the first above-mentioned rolling equipment, the second rolling equipment, the
After three rolling equipments and the 4th rolling equipment, substantially possess and form the deformation condition that coiled tubing needs.
It should be noted that pressure roller all in accompanying drawing is schematical, drawn only for the needs of clear explanation,
The true shape of pressure roller is not represented.The pressure roller of actual use can need to have different shapes and chi according to steel belt molding
It is very little, to ensure to form the coiled tubing of standard specification by steel band.The pressure that pressure roller applies to steel band meets to bring it about
It is plastically deformed and produces bending section, but not to condition that its section thickness has an impact.
As shown in Fig. 2 the first rolling equipment is the H type pressure rollers being centrally located relative to steel band 1, rotated around horizontal axis L,
Its lower edge roll-in makes the both sides of steel band produce upward bending section on steel band.Preferably, the sidepiece of steel band and end H types
The ratio of the distance between lower edge of pressure roller and steel band overall width is 0.1-0.2, preferably 0.15.
As shown in figure 3, the second rolling equipment is the plate-like pressure roller being centrally located relative to steel band 1, its thickness and steel band are total
The ratio of width is 0.6-0.8, preferably 0.8.The scope of angle α between the rolling surface of second rolling equipment and side is
100-110 °, preferably 100 °.The rolling surface of second rolling equipment is the curved surface seamlessly transitted.
As shown in figure 4, the 3rd rolling equipment is the plate-like pressure roller being centrally located relative to steel band 1, its thickness and steel band are total
The ratio of width is 0.4-0.5, preferably 0.5.The scope of angle α between the rolling surface of 3rd rolling equipment and side is
110-120 °, preferably 110 °.The rolling surface of 3rd rolling equipment is the curved surface seamlessly transitted.
As shown in figure 5, the 4th rolling equipment is the plate-like pressure roller being centrally located relative to steel band 1, its thickness and steel band are total
The ratio of width is 0.2-0.3, preferably 0.3.The scope of angle α between the rolling surface of 4th rolling equipment and side is
110-120 °, preferably 120 °.The rolling surface of 4th rolling equipment is the curved surface seamlessly transitted.
As shown in Figure 2-5, steel band successively by above-mentioned first rolling equipment, the second rolling equipment, the 3rd rolling equipment and
After 4th rolling equipment, substantially possesses the deformation condition formed required for coiled tubing.Then, the steel band after deformation is passed through
Cross pipe forming apparatus, you can form the shape of coiled tubing.Three groups of extruding two pairs of rollers are included according to the pipe forming apparatus of the present invention, point
Not as shown in figures 6.It should be noted that the rolling device and pipe forming apparatus shown in accompanying drawing of the present invention are schematic
And it is non-limiting, those skilled in the art can carry out various possible deformations and selection according to being actually needed.
As shown in figures 6, every group of extruding two pairs of rollers include two I-shaped edger rolls of parallel arrangement, and each edger roll can be around perpendicular
Straight axis V is rotated, and the spacing between three groups of extruding two pairs of rollers is sequentially reduced, the sky that steel band passes through between the web of extruding two pairs of rollers successively
Between.It should be noted that the extruding two pairs of rollers in accompanying drawing 6-8 are schematical, drawn only for the needs of clear explanation, and
Do not represent the true shape of extruding two pairs of rollers.The extruding two pairs of rollers of actual use can need to have different shapes according to steel belt molding
Shape and size, to ensure to form the coiled tubing of standard specification.Especially, the region that the web of edger roll contacts with steel band have with
The shape that the surface of bent steel band is adapted.
As shown in fig. 6, which show first extruding two pairs of rollers, the width of steel band and first extruding two pairs of rollers web between away from
Ratio from (clear distance, similarly hereinafter) is 1.8-2.3, can preferably be 2.0.
As shown in fig. 7, which show second extruding two pairs of rollers, the width of steel band and second extruding two pairs of rollers web between away from
From ratio be 2.5-2.8, can preferably be 2.7.
As shown in figure 8, which show the 3rd extruding two pairs of rollers, the width of steel band and the 3rd extruding two pairs of rollers web between away from
From ratio be 3.0-3.1, can preferably be 3.0.After three groups of extruding two pairs of rollers, steel band is substantially formed continuously
The shape of oil pipe.
Next, coiled tubing will pass through laser-beam welding machine, with using laser by the butt welding of coiled tubing together.
Because laser welding is higher to required precision, so needing to be accurately positioned coiled tubing with chucking device during welding, then
Welding assembly is placed in the focusing range of laser beam.As described above, compared to ERW welding manners, can using laser welding
Greatly to reduce the height of inner burr and can effectively prevent trench etching problem.In the present invention, to prepare size
Illustrated exemplified by coiled tubing for Φ 38.1mm*3.2mm (diameter * wall thickness).Preferably, the spot diameter of laser welding is
2mm, bonding power 7500W, focal length 230mm, speed of welding are 1.5 ms/min.It is highly preferred that made during welding using argon gas
To protect gas.
After laser welding forms coiled tubing, except can also increasing the step of burr.Specifically, outer burr can be with
By burr removal device physical removal, or smear burr in the region that outer burr is concentrated and remove the chemical removal of liquid.It is preferred that
Ground, burr remove liquid and can pressed by water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, K-IAO, sodium butyrate
It is 1 according to mass ratio：0.1-0.12：0.08-0.1：0.05-0.07：0.06-0.1:0.01-0.05:0.02-0.04:0-0.02 is mixed
Conjunction is uniformly made.In use, above-mentioned burr removal liquid is uniformly applied to outer burr concentrated area.
Burr removes liquid embodiment 1
Burr removes liquid and pressed by water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, K-IAO, sodium butyrate
It is 1 according to mass ratio：0.12：0.1：0.07：0.1:0.03:0.03:0.02 well mixed is made.
Burr removes liquid embodiment 2
Burr removes liquid and pressed by water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, K-IAO, sodium butyrate
It is 1 according to mass ratio：0.1：0.09：0.06：0.08:0.04:0.04:0.01 well mixed is made.
Burr removes liquid embodiment 3
Burr removes liquid by water, benzoic acid, tartaric acid, salicylic acid, hydrogen peroxide, urea, K-IAO according to quality
Than for 1：0.11：0.08：0.05：0.07:0.05:0.02 well mixed is made.
Next, after carrying out normalized treatment to weld seam, sizing processing is carried out to coiled tubing.
Specifically, illustrated for coiled tubing made of the low-carbon alloy steel in the present invention.Normalizing temperature is 960
DEG C, air cooling after high tempering, temperature is 580 DEG C, and the time of air cooling is 10-15 minutes.Then, using sizing mill to continuous
Oil pipe carries out sizing processing.So-called sizing is the term in steel pipe's production field, and mother tube usually is sent into extruding machine roller-way,
Mother tube is promoted to the roll pass adjusted using the thrust of hydraulic cylinder, corrects the ovality of mother tube.
Next, homogeneous tube heat treatment is carried out to coiled tubing, to eliminate the significance difference between weld seam, heat affected area and mother metal
It is different, make tissue evenly, and eliminate the internal stress of body.
Specifically, coiled tubing can be warming up to 920 DEG C；Then carry out air cooling, after air cooling temperature control 450 DEG C~
470℃；Then water cooling is carried out, cooling velocity is 120 DEG C -150 DEG C/sec, water cooling to room temperature.The technique can significantly improve low-carbon
The toughness of steel alloy, crystal grain thinning degree, the yield strength of continuous steel pipe is set to improve 25~30%.
Next, finishing and reel encapsulation are carried out to coiled tubing.Finishing includes being controlled the size of coiled tubing,
Especially to the adjustment of its caliber and ovality.
Preferably, after coiled tubing finishing, preservative can also be smeared in the outer surface of coiled tubing, for preventing
The corrosion on coiled tubing surface.
As described above, the invention provides a kind of manufacture method of mild steel coiled tubing, from the steel for forming coiled tubing
The many aspects such as the component and production technology of band, former, welding method, heat treatment and Anticorrosion measure are improved,
So that the coiled tubing produced not only meets intensity requirement but also also solves the corrosion-resistant problem in working condition, tool
Have broad application prospects.
Although disclosed herein embodiment as above, described content only to facilitate understand the present invention and adopt
Embodiment, it is not limited to the present invention.Any those skilled in the art to which this invention pertains, this is not being departed from
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (8)
1. a kind of manufacture method of mild steel coiled tubing, it is characterised in that comprise the following steps：
(1) from the steel band of feed reel supply mild steel to cleaning device, the impurity of steel strip surface is removed using alkaline degreaser；
(2) steel band is passed through rolling device, to produce preliminary deformation, be easy to be formed the shape of coiled tubing；
(3) steel band is made to pass through pipe forming apparatus, to form the shape of coiled tubing；
(4) using method for laser welding that the butt welding of steel band is integral, the spot diameter of laser welding is 2mm, welds work(
Rate is 7500W, and focal length 230mm, speed of welding is 1.5 ms/min；
(5) smear burr in the region that outer burr is concentrated and remove liquid and make a return journey flash removed, the burr remove liquid by water, benzoic acid,
Tartaric acid, salicylic acid, hydrogen peroxide, urea, K-IAO, sodium butyrate are 1 according to mass ratio：0.12：0.1：0.07：0.1：
0.03：0.03：0.02 well mixed is made；
(6) normalized treatment is carried out to weld seam, sizing processing is carried out to coiled tubing；
(7) homogeneous tube heat treatment is carried out to coiled tubing, the mode of homogeneous tube heat treatment is：Coiled tubing is warming up to 920 DEG C；Then
Air cooling is carried out, temperature control is at 450 DEG C~470 DEG C after air cooling；Then water cooling is carried out, cooling velocity is 120 DEG C -150 DEG C/sec,
Water cooling is to room temperature；
(8) finishing is carried out to coiled tubing and reel encapsulates；
Chemical composition in the steel band of the mild steel is according to mass percent：C：0.05-0.09%, Mn：0.35-
0.45%, Si：0.35-0.40%, Cr：0.61-0.72%, Nb：0.021-0.024%, Mo：0.01-0.03%, P：0.012-
0.018%, S：0.002-0.005%, remaining is Fe and inevitable impurity；The preparation process of the steel band is：First, will
Said components are smelted according to corresponding mass percent and are cast into slab；Second, by heating of plate blank to 1300-1340 DEG C, protect
The warm time is that 2.0-2.3 divides/millimeter, the thickness depending on slab；3rd, finishing temperature control scope is 820-850 DEG C；The
Four, it is 20-25 DEG C/s to control the cooling velocity in cooling, determines finally to need the temperature cooled down according to coiling temperature；5th,
Coiling temperature is 250-270 DEG C, batches rear natural cooling.
2. manufacture method according to claim 1, it is characterised in that increase step between step (1) and (2)：In profit
Cleaned with alkaline degreaser after terminating, carrying out ultrasonic wave to steel strip surface with clear water cleans, to remove the degreaser on surface；Then
The surface of steel band is dried up by drying blowing device.
3. manufacture method according to claim 1, it is characterised in that in step (8), after coiled tubing finishing,
Preservative is smeared in the outer surface of coiled tubing, for preventing the corrosion on coiled tubing surface.
4. according to the manufacture method any one of claim 1-3, it is characterised in that use argon gas conduct during laser welding
Protect gas.
5. according to the manufacture method any one of claim 1-3, it is characterised in that alkaline degreaser by sodium hydroxide,
Sodium carbonate, sodium metasilicate and water are made, and the mass fraction of each component is respectively sodium hydroxide 0.7%, sodium carbonate 8%, sodium metasilicate
3.5%, remaining is water；The temperature of degreaser is maintained at 85 ± 5 DEG C in skimming processes.
6. according to the manufacture method any one of claim 1-3, it is characterised in that the rolling device includes the first roller
Press equipment, the second rolling equipment, the 3rd rolling equipment and the 4th rolling equipment；
First rolling equipment is the H type pressure rollers being centrally located relative to steel band, is rotated around horizontal axis, its lower edge roll-in
On steel band, the ratio of the distance between lower edge of the sidepiece of steel band and end H type pressure rollers and steel band overall width is 0.1-
0.2；
Second rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of its thickness and steel band overall width is
0.6-0.8, the scope of the angle between the rolling surface of the second rolling equipment and side is 100-110 °；
3rd rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of its thickness and steel band overall width is
0.4-0.5, the scope of the angle between the rolling surface of the 3rd rolling equipment and side is 110-120 °；
4th rolling equipment is the plate-like pressure roller being centrally located relative to steel band, and the ratio of its thickness and steel band overall width is
0.2-0.3, the scope of the angle between the rolling surface of the 4th rolling equipment and side is 110-120 °.
7. according to the manufacture method any one of claim 1-3, it is characterised in that the pipe forming apparatus includes three groups
Two pairs of rollers are extruded, every group of extruding two pairs of rollers include two I-shaped edger rolls of parallel arrangement, and each edger roll rotates around vertical axis, and three
Spacing between group extruding two pairs of rollers is sequentially reduced, the space that steel band passes through between the web of extruding two pairs of rollers successively.
8. manufacture method according to claim 7, it is characterised in that the width of steel band and first extruding two pairs of rollers web it
Between the ratio of distance be 1.8-2.3；The width of steel band and the second ratio for extruding the distance between the web of two pairs of rollers are 2.5-
2.8；The width of steel band and the 3rd ratio for extruding the distance between the web of two pairs of rollers are 3.0-3.1.
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| CN105945517B (en) * | 2016-05-12 | 2018-04-27 | 宝鸡石油钢管有限责任公司 | A kind of continuous velocity tubing string and its manufacture method |
| CN106869814B (en) * | 2017-03-03 | 2018-11-23 | 河北华通线缆集团股份有限公司 | With the continuous umbilical and its manufacturing method blocked in limit |
| CN108942102B (en) * | 2018-08-01 | 2020-05-12 | 河北华通线缆集团股份有限公司 | Manufacturing method of super duplex stainless steel coiled tubing |
| CN109609747B (en) | 2018-12-11 | 2022-01-25 | 信达科创（唐山）石油设备有限公司 | Homogenizing treatment process for coiled tubing |
| CN113937396A (en) * | 2021-08-24 | 2022-01-14 | 无锡市源隆金属制品有限公司 | New energy automobile blade battery tray frame beam and production process thereof |
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| US3405228A (en) * | 1965-08-11 | 1968-10-08 | Gen Cable Corp | Folded, laminated electrical cable sheath having abutting edges of one lamination unwelded |
| KR20070003385A (en) * | 2005-07-01 | 2007-01-05 | 박세헌 | Method of manufacturing wiper for car |
| CN102407426A (en) * | 2010-09-26 | 2012-04-11 | 上海月月潮钢管制造有限公司 | Method for manufacturing low alloy steel tube of low-temperature pressure vessel |
| CN104801925A (en) * | 2014-01-27 | 2015-07-29 | 上海却尘科技有限公司 | Manufacturing method for blank for producing carbon steel-high carbon steel composite board |
| CN104073719A (en) * | 2014-06-25 | 2014-10-01 | 宝山钢铁股份有限公司 | High-strength welded steel pipe and manufacturing method thereof |
| CN104353973A (en) * | 2014-11-13 | 2015-02-18 | 江苏省常熟环通实业有限公司 | Preparation method of austenitic stainless steel pipe |
| CN105057989B (en) * | 2015-08-21 | 2017-06-30 | 西安向阳航天材料股份有限公司 | A kind of manufacture method of liner two-phase stainless steel pipe |
| CN105171349A (en) * | 2015-09-14 | 2015-12-23 | 上海海隆复合钢管制造有限公司 | Preparation method for hydraulic pressure composite thermometal oil pipe |
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Denomination of invention: A manufacturing method of low carbon steel coiled tubing Effective date of registration: 20211025 Granted publication date: 20171212 Pledgee: China Construction Bank Co.,Ltd. Tangshan Jidong Oilfield sub branch Pledgor: HEBEI HUATONG WIRES AND CABLES GROUP Co.,Ltd.|SHINDA(TangShan) CREATIVE OIL&GAS EQUIPMENT Co.,Ltd. Registration number: Y2021990001019 |
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