CN114472524A - Preparation method of iron-nickel-based alloy oil well pipe - Google Patents
Preparation method of iron-nickel-based alloy oil well pipe Download PDFInfo
- Publication number
- CN114472524A CN114472524A CN202210093302.2A CN202210093302A CN114472524A CN 114472524 A CN114472524 A CN 114472524A CN 202210093302 A CN202210093302 A CN 202210093302A CN 114472524 A CN114472524 A CN 114472524A
- Authority
- CN
- China
- Prior art keywords
- percent
- iron
- pipe
- oil well
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 34
- 239000000956 alloy Substances 0.000 title claims abstract description 34
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000003129 oil well Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000005097 cold rolling Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 238000001192 hot extrusion Methods 0.000 claims abstract description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 28
- 239000002253 acid Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 20
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000005554 pickling Methods 0.000 description 14
- 239000006104 solid solution Substances 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000009966 trimming Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005238 degreasing Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/78—Control of tube rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a preparation method of an iron-nickel base alloy oil well pipe, which comprises the following steps: (1) making the iron-nickel base alloy into a tube blank by adopting a hot extrusion mode; (2) carrying out first cold rolling on the tube blank to eliminate the phenomenon of uneven wall thickness caused by hot working and obtain a first intermediate tube; (3) placing the first intermediate pipe at the temperature of 980-1050 ℃ for solution heat treatment, then cooling to obtain a second intermediate pipe, and controlling the cooling rate from the solution heat treatment temperature to 400 ℃ to be 175-200 ℃/min; (4) and performing grinding and repairing straightening on the second intermediate pipe, and then performing second-pass cold rolling to finally obtain the finished oil well pipe. The oil well pipe has higher tensile strength of more than 850MPa and higher yield strength of more than 760 MPa; meanwhile, the corrosion resistance is also better.
Description
Technical Field
The invention relates to the technical field of metal materials, in particular to a preparation method of an iron-nickel-based alloy oil well pipe.
Background
Oil well pipes include drill pipes, casing, tubing, etc. and are formed by special threaded connections to form a drill string and an oil/casing string. The drill string is an essential tool for oil and gas development, and the casing string and the tubing string are the only channels for isolating the stratum and producing oil and gas. The life of a casing determines the life of an oil and gas well, which is the life line of an oil and gas field. Therefore, the oil well pipe plays a very important role in oil exploration and development. The use and management process of oil fields in oil well pipes not only relates to the quality and performance of the oil well pipes, but also is closely related to oil and gas well engineering. Therefore, the poor performance of the oil well pipe can lead to a great deal of failure in the using process, which not only causes great economic loss, but also seriously affects the exploration and development and normal production of the oil and gas field.
The properties of oil well pipes are related to the method of processing and the basic properties of the alloy chosen. The iron-nickel-based alloy is the first choice alloy for oil well pipes due to the excellent corrosion resistance, but the mechanical property is not good, and the performance needs to be improved by processing.
Disclosure of Invention
In order to improve the mechanical property of the iron-nickel-based alloy, the preparation method of the iron-nickel-based alloy oil well pipe is provided. The oil well pipe obtained by the method has better mechanical property.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a preparation method of an iron-nickel base alloy oil well pipe comprises the following steps:
(1) making the iron-nickel base alloy into a tube blank by adopting a hot extrusion mode;
(2) carrying out first cold rolling on the tube blank to eliminate the phenomenon of uneven wall thickness caused by hot working, and obtaining a first intermediate tube;
(3) placing the first intermediate pipe at the temperature of 980-1050 ℃ for solution heat treatment, then cooling to obtain a second intermediate pipe, and controlling the cooling rate from the solution heat treatment temperature to 400 ℃ to be 175-200 ℃/min;
(4) and performing grinding and repairing straightening on the second intermediate pipe, and then performing second-pass cold rolling to finally obtain the finished oil well pipe.
Further, before the first cold rolling, between the first cold rolling and the solid solution heat treatment, and between the solid solution heat treatment and the grinding and repairing straightening, the method also comprises the operation of acid cleaning and impurity removing, wherein mixed acid aqueous solution is adopted for acid cleaning for 2-5min at the temperature of 45-60 ℃, and then water cleaning is carried out; the mixed acid aqueous solution contains 1-8 wt% of hydrofluoric acid and 10-15 wt% of nitric acid. The acid cleaning can degrease and remove oxide skin, and the penetration condition in the heat treatment process is prevented after degreasing and degreasing, so that the corrosion resistance is reduced; the removal of the surface oxide skin can prevent the residual oxide skin from being pressed into the surface of the pipe in the subsequent processing, and the mechanical property and the surface quality of the pipe are not influenced.
Further, when the first cold rolling is carried out, the wall thickness reduction change rate of the tube blank is controlled to be 25-35%, and the diameter reduction change rate of the tube blank is controlled to be 15-25%; and controlling the wall thickness reduction rate of change of the tube blank to be 40-50% and controlling the diameter reduction rate of change of the tube blank to be 15-20% when the second-pass cold rolling is carried out.
Further, during the first cold rolling, controlling the feeding amount to be 3-4mm, the rolling speed to be 40-60 times/min, controlling the tolerance of the wall thickness of the tube to be +/-0.4 mm, and controlling the tolerance of the outer diameter of the tube to be +/-0.4 mm;
and during the second-pass cold rolling, controlling the feeding amount to be 3-4mm, the rolling speed to be 50-60 times/min, controlling the tolerance of the wall thickness of the tube to be +/-0.22 mm, and controlling the tolerance of the outer diameter of the tube to be +/-0.3 mm.
Further, the grinding and correcting are performed to grind and deviate the core of the second middle pipe, and the wall thickness tolerance of the pipe is controlled within +/-0.2 mm. The straightness of the finished product can be ensured by performing grinding, trimming and straightening firstly, and favorable conditions can be provided for the cold rolling precision of the subsequent second pass; because the finished product is delivered in a cold state, the straightness requirement of the delivered product cannot be met through straightening subsequently, the dimensional precision of the finished product needs to be improved through early-stage grinding and then second-stage cold rolling, and therefore the pipe bending phenomenon caused by uneven wall thickness is reduced.
Preferably, the time for raising the temperature of the solution heat treatment to 980-; the temperature of the solution heat treatment is preferably 1000 ℃ and the holding time is preferably 20 min.
Further, cooling after the solution heat treatment is carried out by water cooling. The rapid cooling can dissolve carbide in the austenite in the alloy, and the austenite is in a supersaturated state, thereby improving the mechanical property and the corrosion resistance.
Further, the iron-nickel based alloy comprises the following elements by 100%: less than or equal to 0.05 percent of C, less than or equal to 0.5 percent of Si, less than or equal to 1 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, less than or equal to 0.2 percent of Al, 0.6-1.2 percent of Ti, 1.5-3 percent of Cu, 2.5-3.5 percent of Mo, 19.5-23.5 percent of Cr, 38-46 percent of Ni and the balance of Fe.
Preferably, the iron-nickel based alloy comprises 100% of the following elements: less than or equal to 0.01 percent of C, less than or equal to 0.2 percent of Si, less than or equal to 0.5 percent of Mn, less than or equal to 0.016 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.13 percent of Al, 0.6-0.8 percent of Ti, 2-2.5 percent of Cu, 3-3.2 percent of Mo, 21-23 percent of Cr, 39-41 percent of Ni and the balance of Fe.
The beneficial technical effects are as follows:
the iron-nickel base alloy oil well pipe has higher tensile strength of more than 850MPa, higher yield strength of more than 760MPa and better mechanical property; meanwhile, the corrosion resistance is also better, because the higher Cr content enables the iron-nickel-based alloy to show better corrosion resistance in oxidizing acid and corrosive environment, and because of the synergistic effect of the high Ni content and the Cu element, the alloy also has better corrosion resistance to reducing medium; in addition, the lower C content improves the intergranular corrosion resistance, and the Mo element provides excellent local corrosion resistance.
Drawings
FIG. 1 is a temperature/time process profile of solution heat treatment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
Unless specifically stated otherwise, the numerical values set forth in these examples do not limit the scope of the invention. Techniques, methods known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that the terms "first", "second", and the like are used to define the intermediate pipe only for the convenience of distinguishing the products of the respective steps, and the terms are not intended to limit the scope of the present invention since they are not intended to be specific unless otherwise stated.
Example 1
A preparation method of an iron-nickel base alloy oil well pipe comprises the following steps:
(1) the iron-nickel base alloy comprises the following elements in percentage by weight: 0.01% of C, 0.192% of Si, 0.449% of Mn, 0.016% of P, 0.0008% of S, 0.124% of Al, 0.701% of Ti, 2.14% of Cu, 3.12% of Mo, 22.56% of Cr, 39.7% of Ni, and the balance of Fe and inevitable impurities;
adopting a hot extrusion mode to manufacture the iron-nickel base alloy into a tube blank with phi of 133 multiplied by 15 mm;
pickling the tube blank to remove oil, pickling the tube blank for 5min at 60 ℃ by adopting a mixed acid aqueous solution of hydrofluoric acid and nitric acid (wherein the hydrofluoric acid accounts for 5 wt% and the nitric acid accounts for 10 wt%), and then washing the tube blank by using high-pressure water to ensure that no acid liquor remains in the tube;
(2) carrying out first cold rolling on the pickled phi 133 multiplied by 15mm tube blank by adopting an LG110 cold rolling mill to eliminate the phenomenon of uneven wall thickness caused by hot working, wherein the feeding amount is 3.5mm, the rolling speed is 60 times/min, the tolerance of the outer diameter of the tube is +/-0.4 mm, and the tolerance of the wall thickness of the tube is +/-0.4 mm, so as to obtain a phi 108 multiplied by 10mm first intermediate tube;
pickling the first intermediate pipe to remove oil, pickling the first intermediate pipe for 30min at 60 ℃ by adopting a mixed acid aqueous solution of hydrofluoric acid and nitric acid (wherein the hydrofluoric acid accounts for 1 wt% and the nitric acid accounts for 10 wt%) until the inner surface and the outer surface of the first intermediate pipe are free of grease, and then washing the first intermediate pipe with high-pressure water to ensure that no residual acid liquid exists in the pipe; the pickling degreasing is carried out before the solution heat treatment, so that the penetration condition in the heat treatment process can be prevented, and the corrosion resistance is reduced;
(3) placing the first intermediate pipe after acid washing in a solid solution furnace for solid solution heat treatment, setting the temperature of the solid solution heat treatment to be 1000 ℃, controlling the time of raising the temperature to 1000 ℃ to be within 15min, preserving the temperature for 20min at 1000 ℃, then performing water cooling, and controlling the temperature to be reduced from 1000 ℃ to 400 ℃ within 3min so as to achieve rapid cooling (the cooling rate reaches 200 ℃/min), thereby obtaining a second intermediate pipe; the carbide can be dissolved in the austenite by rapid cooling, and the austenite is in a supersaturated state, so that the mechanical property and the corrosion resistance are improved; the temperature/time process profile of the solution heat treatment is shown in fig. 1;
pickling the second intermediate pipe to remove surface oxide skin, pickling with mixed acid aqueous solution of hydrofluoric acid and nitric acid (wherein the hydrofluoric acid accounts for 5 wt% and the nitric acid accounts for 15 wt%) at 60 ℃ for 5min, and then washing with high-pressure water to ensure that no residual acid liquid exists in the pipe; the surface scale is removed by acid washing, so that residual scale is prevented from being pressed into the surface of the pipe in subsequent processing, and the performance and the surface quality are prevented from being influenced;
(4) and (3) firstly carrying out grinding, trimming and straightening on the acid-washed second middle pipe: grinding an eccentric core to ensure that the tolerance of the wall thickness is controlled within +/-0.2 mm, then carrying out second-pass cold rolling by adopting an LG110 cold rolling mill, wherein the feeding amount is 3mm, the rolling speed is 60 times/min, the tolerance of the outer diameter of the pipe is controlled to be +/-0.3 mm, and the tolerance of the wall thickness of the pipe is controlled to be +/-0.22 mm, and finally obtaining a finished oil well pipe with phi of 88.9 multiplied by 5.65 mm; the straightness of the finished product can be ensured by carrying out grinding and trimming straightening firstly, and favorable conditions can be provided for the cold rolling precision of the subsequent second pass; because the finished product is delivered in a cold state, the straightness requirement of the delivered product cannot be met through straightening subsequently, the dimensional precision of the finished product needs to be improved through early-stage grinding and then second-stage cold rolling, and therefore the pipe bending phenomenon caused by uneven wall thickness is reduced.
Example 2
(1) The iron-nickel base alloy comprises the following elements in percentage by weight: 0.009% of C, 0.20% of Si, 0.5% of Mn, 0.016% of P, 0.0009% of S, 0.125% of Al, 0.73% of Ti, 2.2% of Cu, 3.2% of Mo, 21% of Cr, 41% of Ni, and the balance of Fe and inevitable impurities;
adopting a hot extrusion mode to manufacture the iron-nickel base alloy into a tube blank with phi of 133 multiplied by 15 mm;
pickling the tube blank to remove oil, pickling the tube blank for 5min at 60 ℃ by adopting a mixed acid aqueous solution of hydrofluoric acid and nitric acid (wherein the hydrofluoric acid accounts for 10 wt% and the nitric acid accounts for 10 wt%), and then washing the tube blank by high-pressure water to ensure that no residual acid liquid exists in the tube;
(2) carrying out first cold rolling on the pickled phi 133X 15mm tube blank by adopting an LG110 cold rolling mill to eliminate the phenomenon of uneven wall thickness caused by hot working, feeding the tube blank by 4mm, and rolling at a rolling speed of 55 times/min, and controlling the tolerance of +/-0.4 mm of the outer diameter of the tube and +/-0.4 mm of the wall thickness of the tube to obtain a phi 108X 10mm first intermediate tube;
pickling the first intermediate pipe to remove oil, pickling the first intermediate pipe for 30min at 60 ℃ by adopting a mixed acid aqueous solution of hydrofluoric acid and nitric acid (wherein the hydrofluoric acid accounts for 1 wt% and the nitric acid accounts for 10 wt%) until the inner surface and the outer surface of the first intermediate pipe are free of grease, and then washing the first intermediate pipe with high-pressure water to ensure that no residual acid liquid exists in the pipe; the pickling degreasing is carried out before the solution heat treatment, so that the penetration condition in the heat treatment process can be prevented, and the corrosion resistance is reduced;
(3) placing the first intermediate pipe after acid washing in a solid solution furnace for solid solution heat treatment, setting the temperature of the solid solution heat treatment to 1050 ℃, controlling the time of heating to 1050 ℃ within 15min, keeping the temperature at 1000 ℃ for 20min, then performing water cooling, and controlling the temperature to decrease from 1050 ℃ to 400 ℃ within 3.5min so as to achieve rapid cooling, thereby obtaining a second intermediate pipe; the carbide can be dissolved in the austenite by rapid cooling, and the austenite is in a supersaturated state, so that the mechanical property and the corrosion resistance are improved; the temperature/time process profile of the solution heat treatment is shown in fig. 1;
pickling the second intermediate pipe to remove surface oxide skin, pickling with mixed acid aqueous solution of hydrofluoric acid and nitric acid (wherein the hydrofluoric acid accounts for 10 wt% and the nitric acid accounts for 10 wt%) at 60 ℃ for 5min, and then washing with high-pressure water to ensure that no residual acid liquid exists in the pipe; the surface scale is removed by acid washing, so that residual scale is prevented from being pressed into the surface of the pipe in subsequent processing, and the performance and the surface quality are prevented from being influenced;
(4) and (3) firstly carrying out grinding, trimming and straightening on the acid-washed second middle pipe: grinding an eccentric core to ensure that the tolerance of the wall thickness is controlled within +/-0.2 mm, then carrying out second-pass cold rolling by adopting an LG110 cold rolling mill, wherein the feeding amount is 3.5mm, the rolling speed is 60 times/min, the tolerance of the outer diameter of the pipe is controlled to be +/-0.3 mm, and the tolerance of the wall thickness of the pipe is controlled to be +/-0.22 mm, and finally obtaining a finished oil well pipe with phi of 88.9 multiplied by 5.65 mm; the straightness of the finished product can be ensured by performing grinding, trimming and straightening firstly, and favorable conditions can be provided for the cold rolling precision of the subsequent second pass; because the finished product is delivered in a cold state, the straightness requirement of the delivered product cannot be met through straightening subsequently, the dimensional precision of the finished product needs to be improved through early-stage grinding and then second-stage cold rolling, and therefore the pipe bending phenomenon caused by uneven wall thickness is reduced.
Comparative example 1
The oil country tubular good of this comparative example was produced in the same manner as in example 1, except that cooling by water cooling was controlled to 100 ℃/min after the solution heat treatment.
The oil country tubular goods of the above examples and comparative examples were subjected to performance tests. The specific data are shown in Table 1.
As can be seen from table 1, the water cooling rate of comparative example 1 is slower than that of example 1, which affects the precipitation of carbides at grain boundaries, and even a very small amount of the precipitated carbides affects the mechanical properties of the material. The rapid cooling after the full solution heat treatment of the present invention ensures that there are no continuous carbide phases at the grain boundaries of the microstructure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The preparation method of the iron-nickel base alloy oil well pipe is characterized by comprising the following steps of:
(1) making the iron-nickel base alloy into a tube blank by adopting a hot extrusion mode;
(2) carrying out first cold rolling on the tube blank to eliminate the phenomenon of uneven wall thickness caused by hot working, and obtaining a first intermediate tube;
(3) placing the first intermediate pipe at the temperature of 980-1050 ℃ for solution heat treatment, then cooling to obtain a second intermediate pipe, and controlling the cooling rate from the solution heat treatment temperature to 400 ℃ to be 175-200 ℃/min;
(4) and performing grinding and repairing straightening on the second intermediate pipe, and then performing second-pass cold rolling to finally obtain the finished oil well pipe.
2. The method for preparing an iron-nickel-based alloy oil well pipe according to claim 1, further comprising an operation of acid washing for impurity removal before the first cold rolling, between the first cold rolling and the solution heat treatment, between the solution heat treatment and the straightening of the mill repair, the acid washing being performed with a mixed acid aqueous solution at 45 to 60 ℃ for at least 2min, and then the water washing; the mixed acid aqueous solution contains 1-8 wt% of hydrofluoric acid and 10-15 wt% of nitric acid.
3. The method for manufacturing the iron-nickel base alloy oil well pipe according to claim 1, wherein the first cold rolling is performed by controlling the wall thickness reduction rate of the pipe blank to be 25-35% and controlling the diameter reduction rate of the pipe blank to be 15-25%; and controlling the wall thickness reduction rate of change of the tube blank to be 40-50% and controlling the diameter reduction rate of change of the tube blank to be 15-20% when the second-pass cold rolling is carried out.
4. The method for manufacturing an iron-nickel based alloy oil well pipe according to claim 3, wherein in the first cold rolling, the feeding amount is controlled to be 3-4mm, the rolling speed is controlled to be 40-60 times/min, the tolerance of the wall thickness of the pipe is controlled to be +/-0.4 mm, and the tolerance of the outer diameter of the pipe is controlled to be +/-0.4 mm;
and during the second-pass cold rolling, controlling the feeding amount to be 3-4mm, the rolling speed to be 50-60 times/min, controlling the tolerance of the wall thickness of the tube to be +/-0.22 mm, and controlling the tolerance of the outer diameter of the tube to be +/-0.3 mm.
5. The method for preparing an iron-nickel base alloy oil well pipe according to claim 1, wherein the grinding and straightening is to grind and eccentric the second intermediate pipe to ensure that the tolerance of the pipe wall thickness is controlled within +/-0.2 mm.
6. The method for preparing the iron-nickel-based alloy oil well pipe as claimed in claim 1, wherein the time for raising the temperature of the solution heat treatment to 980-1050 ℃ is controlled within 15min, and the time for maintaining the temperature after reaching 980-1050 ℃ is at least 20 min; and cooling by water after the solution heat treatment.
7. The method for preparing an iron-nickel based alloy oil well pipe according to any one of claims 1 to 6, wherein the iron-nickel based alloy comprises the following elements in percentage by weight: less than or equal to 0.05 percent of C, less than or equal to 0.5 percent of Si, less than or equal to 1 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, less than or equal to 0.2 percent of Al, 0.6-1.2 percent of Ti, 1.5-3 percent of Cu, 2.5-3.5 percent of Mo, 19.5-23.5 percent of Cr, 38-46 percent of Ni, and the balance of Fe and inevitable impurities.
8. The method for preparing the iron-nickel based alloy oil well pipe according to claim 7, wherein the iron-nickel based alloy comprises the following elements in percentage by weight: less than or equal to 0.01 percent of C, less than or equal to 0.2 percent of Si, less than or equal to 0.5 percent of Mn, less than or equal to 0.016 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.13 percent of Al, 0.6-0.8 percent of Ti, 2-2.5 percent of Cu, 3-3.2 percent of Mo, 21-23 percent of Cr, 39-41 percent of Ni, and the balance of Fe and inevitable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093302.2A CN114472524A (en) | 2022-01-26 | 2022-01-26 | Preparation method of iron-nickel-based alloy oil well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093302.2A CN114472524A (en) | 2022-01-26 | 2022-01-26 | Preparation method of iron-nickel-based alloy oil well pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114472524A true CN114472524A (en) | 2022-05-13 |
Family
ID=81474992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210093302.2A Pending CN114472524A (en) | 2022-01-26 | 2022-01-26 | Preparation method of iron-nickel-based alloy oil well pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114472524A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4421571A (en) * | 1981-07-03 | 1983-12-20 | Sumitomo Metal Industries, Ltd. | Process for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking |
| CN102257167A (en) * | 2008-12-18 | 2011-11-23 | 住友金属工业株式会社 | Method for producing high alloy steel pipe |
| CN104789816A (en) * | 2015-04-10 | 2015-07-22 | 太原钢铁(集团)有限公司 | Ni-based corrosion resistant alloy for high-acidity oil-gas field and manufacturing method of oil casing of Ni-based corrosion resistant alloy for high-acidity oil-gas field |
| CN109576469A (en) * | 2018-11-27 | 2019-04-05 | 山西太钢不锈钢股份有限公司 | A method of improving iron abros oil well pipe anti-stress corrosion performance |
| CN111636013A (en) * | 2020-06-12 | 2020-09-08 | 江苏银环精密钢管有限公司 | Novel nickel-chromium-cobalt-molybdenum high-temperature alloy seamless tube for power station and manufacturing method |
| CN112238328A (en) * | 2020-09-24 | 2021-01-19 | 邯郸新兴特种管材有限公司 | Preparation method of high-steel-grade Ni-based alloy |
-
2022
- 2022-01-26 CN CN202210093302.2A patent/CN114472524A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4421571A (en) * | 1981-07-03 | 1983-12-20 | Sumitomo Metal Industries, Ltd. | Process for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking |
| CN102257167A (en) * | 2008-12-18 | 2011-11-23 | 住友金属工业株式会社 | Method for producing high alloy steel pipe |
| CN104789816A (en) * | 2015-04-10 | 2015-07-22 | 太原钢铁(集团)有限公司 | Ni-based corrosion resistant alloy for high-acidity oil-gas field and manufacturing method of oil casing of Ni-based corrosion resistant alloy for high-acidity oil-gas field |
| CN109576469A (en) * | 2018-11-27 | 2019-04-05 | 山西太钢不锈钢股份有限公司 | A method of improving iron abros oil well pipe anti-stress corrosion performance |
| CN111636013A (en) * | 2020-06-12 | 2020-09-08 | 江苏银环精密钢管有限公司 | Novel nickel-chromium-cobalt-molybdenum high-temperature alloy seamless tube for power station and manufacturing method |
| CN112238328A (en) * | 2020-09-24 | 2021-01-19 | 邯郸新兴特种管材有限公司 | Preparation method of high-steel-grade Ni-based alloy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0459909B1 (en) | Process for manufacturing corrosion-resistant seamless titanium alloy tubes and pipes | |
| JP3758508B2 (en) | Manufacturing method of duplex stainless steel pipe | |
| CN110607479B (en) | Stainless steel for valve spring and preparation method of steel wire of stainless steel | |
| EP3597781A1 (en) | Copper-nickel-tin alloy with high toughness | |
| CN109706344B (en) | High-strength and high-toughness titanium alloy pipe for oil and gas development and preparation method thereof | |
| JPWO2013133076A1 (en) | Manufacturing method of high strength steel with excellent resistance to sulfide stress cracking | |
| CN108467969B (en) | High-corrosion-resistance titanium alloy pipe for oil and gas development and preparation method thereof | |
| CN115667560B (en) | Alloy pipe and method for manufacturing same | |
| JP3934372B2 (en) | High strength and low Young's modulus β-type Ti alloy and method for producing the same | |
| CN101905410A (en) | Method for producing titanium tube for salt manufacturing equipment | |
| WO2020259246A1 (en) | High-temperature alloy seamless tube and preparation method therefor | |
| CN111438318B (en) | Thin-wall high-strength titanium alloy pipe and preparation method thereof | |
| CN114472524A (en) | Preparation method of iron-nickel-based alloy oil well pipe | |
| JP5142792B2 (en) | High fatigue life quenched and tempered steel pipe and method for manufacturing the same | |
| JPH0325253B2 (en) | ||
| CN109468492B (en) | Titanium alloy plate with high impact toughness and processing technology thereof | |
| WO2022255223A1 (en) | Austenitic stainless steel and steel pipe | |
| CN110777247A (en) | NS1403 iron-nickel base alloy corrosion-resistant seamless pipe and preparation process thereof | |
| CN105543715A (en) | High-intensity and corrosion-resistant high-nitrogen steel fastener and manufacturing process thereof | |
| CN112044979A (en) | Low-bursting-rate pure titanium seamless tube for metal corrugated tube and production process thereof | |
| CN114602994B (en) | Preparation method of cold-work hardened stainless steel bar | |
| JPH09324848A (en) | Carbon sintered gear component | |
| CN115874129B (en) | Preparation method of titanium strip coil for plate heat exchanger | |
| JP2000160247A (en) | Manufacture of duplex stainless steel tube | |
| JP7323784B2 (en) | Manufacturing method of stainless steel pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220513 |