CN116274466A - Production method of petroleum casing pipe for window sidetracking - Google Patents

Production method of petroleum casing pipe for window sidetracking Download PDF

Info

Publication number
CN116274466A
CN116274466A CN202310223424.3A CN202310223424A CN116274466A CN 116274466 A CN116274466 A CN 116274466A CN 202310223424 A CN202310223424 A CN 202310223424A CN 116274466 A CN116274466 A CN 116274466A
Authority
CN
China
Prior art keywords
upsetting
temperature
percent
pipe
thickening
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
Application number
CN202310223424.3A
Other languages
Chinese (zh)
Inventor
赵中清
吴志伟
尹凤先
张兴勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Advanced Metal Materials Industry Technology Research Institute Co Ltd
Original Assignee
Chengdu Advanced Metal Materials Industry Technology Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chengdu Advanced Metal Materials Industry Technology Research Institute Co Ltd filed Critical Chengdu Advanced Metal Materials Industry Technology Research Institute Co Ltd
Priority to CN202310223424.3A priority Critical patent/CN116274466A/en
Publication of CN116274466A publication Critical patent/CN116274466A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a production method of a petroleum casing pipe for window sidetracking. The method comprises the following steps: rolling a casting blank formed by smelting and continuous casting into a steel pipe; upsetting and thickening the obtained pipe end of the steel pipe; and carrying out full-length heat treatment on the upsetting and thickening steel pipe to obtain the petroleum casing pipe. After the processes of earlier smelting, continuous casting and pipe rolling, and the processes of special upsetting thickening, heat treatment and the like, the upsetting thickening sleeve is formed, and the upsetting thickening sleeve has high strength, yield strength of more than 140ksi and good mechanical property and corrosion resistance due to the material and processing characteristics, and can meet the requirements of ultra-deep well window sidetracking in the petroleum and gas industry.

Description

Production method of petroleum casing pipe for window sidetracking
Technical Field
The invention relates to the technical field of ferrous metallurgy and metal pressure processing, in particular to a production method of a petroleum casing pipe for window sidetracking.
Background
The open-window sidetracking drilling technology is a comprehensive drilling technology developed on the basis of directional well, horizontal well and slim hole drilling technology, and represents the development level of the drilling technology to a certain extent. The technology can revive the lost well, the production stopping well, the abandoned well, the low-yield well and the like, improve the exploitation efficiency of oil reservoirs, effectively develop various oil reservoirs, improve the recovery ratio and the oil well yield, reduce the comprehensive exploitation cost, fully utilize the well structure of the old well to re-dive the oil reservoirs, fully utilize the original well site, the ground exploitation and transportation equipment and the like, reduce the drilling operation cost, save the casing use cost and the ground construction cost, reduce the construction cost, shorten the construction period and improve the comprehensive economic benefit. The popularization of the open window sidetracking drilling technology is also beneficial to environmental protection.
Currently, some oil reservoirs in oil fields are deeper (the depth can be more than 5500 m), and sidetrack secondary recovery is needed along with the requirement of stable production. For a Φ177.8mm casing sidetrack, limited by a Φ177.8mm casing diameter of 149.2mm, existing APIs lack a casing that can be used for sidetrack. On one hand, the existing API cannot meet the requirement of the running clearance, and on the other hand, the existing API is difficult to meet the requirement of the ultra-deep well strength.
Based on the above technical background, there is a need to propose a production method of petroleum casing for window sidetracking to meet the requirements of window sidetracking of ultra-deep wells.
Disclosure of Invention
The object of the present invention is to provide a method for producing a petroleum casing for open-window sidetracking that solves at least one of the above-mentioned problems of the prior art. After the processes of earlier smelting, continuous casting and pipe rolling, and the processes of special upsetting thickening, heat treatment and the like, the upsetting thickening sleeve is formed, and the upsetting thickening sleeve has high strength, yield strength of more than 140ksi and good mechanical property and corrosion resistance due to the material and processing characteristics, and can meet the requirements of ultra-deep well window sidetracking in the petroleum and gas industry.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
according to an aspect of the present invention, there is provided a method of producing a petroleum casing for open-window sidetracking, comprising the steps of:
step 1): rolling a casting blank formed by smelting and continuous casting into a steel pipe;
step 2): upsetting and thickening the pipe end of the steel pipe obtained in the step 1);
step 3): and carrying out full-length heat treatment on the upsetting and thickening steel pipe to obtain the petroleum casing pipe.
According to one embodiment of the invention, the petroleum casing comprises the following components in weight percent: c:0.10 to 0.35 percent, mn:0.20 to 1.20 percent, cr:0.4 to 1.50 percent, mo:0.40 to 1.0 percent, less than or equal to 0.45 percent of Si, less than or equal to 1.5 percent of Ni, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and unavoidable impurity elements.
According to one embodiment of the invention, the tapping temperature of the tube blank in the rolling operation in step 1) is 1255-1265 ℃, the initial rolling temperature of the piercing mill is 1190-1200 ℃, the outlet speed of the piercing mill is reduced to 0.5m/s, and the temperature of the tube blank after piercing is controlled to be 1235-1245 ℃.
According to one embodiment of the invention, the rolling operation of step 1) has a piercing mill deformation of 66.9% and a mandrel mill deformation of 18.8%.
According to one embodiment of the present invention, step 1) uniformly sprays an antioxidant to the inner surface of the capillary in the rolling operation, and uniformly spreads a guide disc lubricant on the surface of the guide disc.
According to one embodiment of the invention, the upsetting and thickening operation in step 2) comprises heating the pipe end of the steel pipe to 1160-1200 ℃ by adopting an intermediate frequency induction heating furnace, feeding the pipe end heated pipe blank into a die cavity for clamping, and then upsetting the pipe blank forward by using a punch to deform metal in the die cavity formed by the die cavity and the upsetting surface of the punch.
According to one embodiment of the invention, the upsetting temperature is controlled to 1100-1200 ℃, the upsetting stroke is controlled to 504-546 mm, and the forming upsetting force is controlled to 216-251 tons.
According to one embodiment of the invention, the full length heat treatment of step 3) comprises a quenching and tempering heat treatment.
According to one embodiment of the invention, the quenching heat treatment comprises heating the steel pipe to 880-920 ℃, preserving heat for 15-25 minutes, water cooling, the water temperature is less than or equal to 35 ℃, and the tempering heat treatment comprises heating the steel pipe to 640-660 ℃, preserving heat for 20-40 minutes, and air cooling to room temperature.
According to one embodiment of the invention, the steel pipe is tempered and then straightened at the temperature of 500 ℃ or higher.
The production method of the petroleum casing pipe for window sidetracking provided by the invention forms an upsetting thickened casing pipe after the working procedures of earlier smelting, continuous casting, pipe rolling, special upsetting thickening, heat treatment and the like, has high strength, high yield strength up to 140ksi or more and good mechanical property and corrosion resistance due to the material and processing characteristics, and can meet the requirements of ultra-deep well window sidetracking in petroleum and gas industries; in the upsetting operation, the defects of convex edges, grooves, burrs, pits, scars and the like on the inner and outer surfaces of the thickened end of the steel pipe are avoided by comprehensively controlling the clamping mode of the pipe end, the upsetting force and the heating temperature of the steel pipe at the thickened end; and after upsetting and thickening, the steel pipe is subjected to full-length heat treatment, so that the upsetting end and the pipe body are consistent in mechanical performance, and the room-temperature mechanical tensile performance is required: the yield strength reaches the minimum 965MPa, the maximum 1172MPa, and the minimum tensile strength is 1034MPa, thereby meeting the use requirement of the ultra-deep well window sidetracking; in addition, the thickened part at the end part of the steel pipe and the main body are integrally formed, and in the prior art, a sleeve pipe and a joint with uniform wall thickness are usually formed respectively and then are connected together.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 schematically illustrates a flow chart of a method of producing a petroleum casing for open-window sidetracking according to the present invention;
FIG. 2 illustrates deformation resistance and area shrinkage of alloy steel at different temperatures according to some embodiments of the present invention;
FIG. 3 illustrates a CCT curve for alloy steel according to some embodiments of the invention;
FIG. 4 illustrates a cutaway topography of a sleeve made in accordance with some embodiments of the present invention;
fig. 5 illustrates a cross-sectional profile view of a sleeve made in accordance with some embodiments of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 1 schematically shows a flow chart of a method for producing a petroleum casing for open-window sidetracking according to the invention.
As shown, the method generally comprises the steps of:
step S1: rolling a casting blank formed by smelting and continuous casting into a steel pipe;
step S2: upsetting and thickening the pipe end of the steel pipe obtained in the step S1;
step S3: and (5) carrying out full-length heat treatment on the upsetting and thickening treated steel pipe to obtain the petroleum casing pipe.
In order to obtain a higher yield strength, the material is designed to have a higher alloy content. Specifically, the petroleum casing comprises the following components in percentage by weight: c:0.10 to 0.35 percent, mn:0.20 to 1.20 percent, cr:0.4 to 1.50 percent, mo:0.40 to 1.0 percent, less than or equal to 0.45 percent of Si, less than or equal to 1.5 percent of Ni, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and unavoidable impurity elements. Smelting and continuous casting may be carried out by conventional procedures in the art.
In the operation of rolling a cast slab into a steel pipe in step S1, it is necessary to set an appropriate heating temperature and start rolling temperature. The surface shrinkage is a main index for measuring the plasticity of metal, the deformation temperature directly influences the deformation resistance of the metal, and the temperature interval with lower deformation resistance and higher surface shrinkage is an ideal plastic processing interval. In designing the rolling process parameters, the invention firstly carries out the measurement of deformation resistance and area shrinkage under different temperature conditions on the alloy steel grade on a Gleeble thermal simulator, and the result is shown in figure 2. The ideal plastic working temperature interval of the steel grade is 1160-1260 ℃ and is taken as an important basis for making the heating temperature of the tube blank.
To stably pierce and continuously roll the alloy steel, the billet heating temperature and piercing-rolling speed are controlled within the optimal ranges, and finally, the tapping temperature of the tube blank is determined to be about 1255-1265 ℃, the piercing-rolling start temperature of the piercing mill is 1190-1200 ℃ (the temperature drop of the tube blank from the annular furnace to the piercing mill is about 60-70 ℃). The outlet speed of the perforating machine is reduced to 0.5m/s, and the temperature of the capillary after perforation is controlled to be about 1235-1245 ℃. The temperature drop from the perforation to continuous rolling is about 80 ℃, but the initial rolling temperature of the continuous tube mill is still above 1160 ℃.
In distributing deformation of the perforator and the mandrel mill, the deformation should be advanced to the perforator as much as possible. The elongation coefficient of the continuous tube mill is reduced, the rolling load of the continuous tube mill is reduced, and the uneven deformation degree of continuous rolling is reduced, so that the occurrence of rolling defects is reduced. For this purpose, the method of the invention has a deformation rate of 66.9% for the piercing mill and 18.8% for the mandrel mill.
In addition, attention is paid to the process lubrication of the reinforcing mandrel and the guide disc during rolling of the steel pipe. The process lubrication is one of the key factors for improving the quality of the inner surface and the outer surface of the alloy sleeve, and is also an important measure for reducing the defects of uneven wall thickness and concave quality of the steel pipe caused by too large transverse deformation of metal. Uniformly spraying an antioxidant on the inner surface of the capillary tube to ensure that the working section of the core rod is well lubricated. Aiming at the problem of steel sticking of the guide disc, the special guide disc lubricant is used, and is uniformly smeared on the surface of the guide disc during perforation, so that the problem of easy steel sticking of the guide disc is solved.
The upsetting and thickening operation of the steel pipe end in the step S2 mainly comprises the following production processes:
feeding (alignment), taking materials, heating by a No. 1 heating furnace, thickening by a No. 1 thickening machine, reversely aligning, heating by a No. 2 heating furnace, thickening by a No. 2 thickening machine, discharging a finished product (entering a charging basket), polishing on a table, checking, polishing and modifying, and collecting qualified products.
Wherein, 1# thickening machine and 2# thickening machine are thickened to the both ends of steel pipe respectively. The method of the invention obtains the thickened end parts with internal and external simultaneous thickening, smooth surface, no defects of pits, wrinkles and the like and natural and smooth inner and outer transition sections by optimizing the design of a thickening die, optimizing the induction heating system of the pipe end, improving upsetting lubrication equipment and improving lubrication effect and adopting a unique one-time heating and one-time upsetting molding process.
The manufacturing process is performed on an upsetting thickening machine (clamping force 560T/upsetting force 280T, heating temperature: 700-1200 ℃, working pressure 25Mpa, vertical stroke 500mm, horizontal stroke 800mm, maximum speed of horizontal cylinder: 250mm/s, center of horizontal cylinder (punch thickened portion maintains good coaxiality with pipe body: inner and outer coaxiality is not more than 1.2 mm.) taking a sleeve with the following dimensions as an example for manufacturing, wherein the diameter of a pipe end upsetting thickened end with the specification of phi 139.7X7.72 mm is 146-148 mm, the external thickening length is 120-140 m, the diameter of a pipe end upsetting thickened end with the dimension phi 118-118.5 mm, the internal thickening length is 130-140 mm, the diameter of phi 139.7X7.72 participates in the deformation length is 334mm, the length is 170mm after thickening, the required upsetting stroke is 526mm, and the heating length is 420mm.
The intermediate frequency induction type heating furnace is adopted, the heating length of the intermediate frequency induction type heating furnace needs to meet the requirement of more than or equal to 450mm in consideration of the space of process adjustment, the heating temperature is 1160-1200 ℃, the heating precision is +/-10 ℃, the heating time is 80-90S, the upsetting temperature is 1100-1200 ℃, the upsetting stroke is 504-546 mm, and the one-step forming upsetting force is 216-251 tons.
And heating the pipe end of the alloy seamless steel pipe to the optimal deformation temperature of 1160-1200 ℃ by adopting an intermediate frequency induction heating furnace, feeding the pipe blank heated by the pipe end into a die cavity for clamping, and then upsetting the pipe blank forward by a punch to deform metal in a die cavity formed by the die cavity and the upsetting surface of the punch. In order to ensure that the upsetting thickened end does not generate an external surface convex edge (mold closing line) and the outer diameter size of the thickened end is not out of tolerance, the clamping force of the mold is controlled, and the thickness of the mold closing line is reduced. If the set upsetting force is too large, metal can be extruded from a gap between a die cavity and a punch to generate flash; however, if the set upsetting force is smaller, the upsetting force of the metal reaches the set value under the condition that the die cavity is not filled, the punch returns, and a groove appears at the end head. In actual production, the die lubrication effect is improved, burrs generated by the pipe ends are effectively reduced, the die lubrication is well controlled, upsetting force is well controlled, and the pipe ends burrs and grooves are eliminated. The thickened end has low temperature, uneven heating temperature, short feeding stroke of a punch head and defects caused by insufficient lubrication and cooling of a die. The graphite nozzle adopts the fan shape, the spraying area is large and even, the cooling water quantity of the die is sufficient, a certain water pressure is ensured, the impurities such as iron scales and dirt adhered on the die are washed away, the temperature of the working surface of the punch is reduced faster, and the service life of the punch is prolonged. If the heating temperature is too high, a certain part of the outer surface of the steel pipe is oxidized, graphite is extruded on the outer surface, and after heat treatment, a small block (button) which is harder than other parts is formed at the oxidized part, so that the heating temperature is properly reduced, the oxidation of metal on the outer surface can be reduced, and further the generation of scar defects is reduced.
The full length heat treatment of step S3 mainly includes quenching and tempering heat treatments. Because the difference between the thickened end and the specification of the pipe body is larger, the performance of the upsetting part is ensured to be consistent with that of the pipe body, and a tempered martensite structure with uniform carbide dispersion distribution is obtained, therefore, a heat treatment process combining quenching and high-temperature tempering is adopted.
Firstly, carrying out related experiments in a laboratory, researching the influence of heat treatment process factors such as quenching heating temperature, heating time, quenching mode, tempering temperature and the like on the mechanical property and corrosion resistance of the alloy steel pipe, and optimizing proper heat treatment process parameters.
From metal mechanics, the CCT curve reflects the transformation rule of supercooled austenite under continuous cooling conditions, is a basis for analyzing the austenite transformation process and the product structure and performance in the continuous cooling process, and is also an important reference material for formulating a heat treatment process. First, the transformation points and continuous cooling transformation graphs of the steel were measured according to the YB/T5123-93 and YB/T5128-93 standards by using a Formastor-II thermal expansion phase transformation instrument, respectively, as shown in the following tables 1 and 3.
Table 1 alloy steel transformation points
Ac 1 Ac 3 Ar 1 Ar 3
Temperature (. Degree. C.) 766.7 844.1 439.1 586.9
Note that: a is that c1 : a lower critical point when heated; a is that c3 : upper critical point of hypoeutectoid steel during heating; a is that r1 : lower critical point at cooling; a is that r3 : upper critical point of hypoeutectoid steel cooling.
In view of the influence of the alloying elements, the quenching temperature is generally A in order to accelerate austenitization c3 +30 to 50 ℃, the method of the invention therefore controls the quenching temperature to 880 to 920 ℃. The quenching heating time is controlled to 15-25 minutes, and in some embodiments, may be kept for about 20 minutes, considering that the thickened end of the thickest part of the tube is austenitized slightly longer than a conventional sleeve.
When the tempering temperature and the heating time are determined, firstly, the process study of the influence of different tempering temperatures and heating time on the performance is carried out under the laboratory condition, and experiments show that the small sample is heated in a box-type resistance furnace, the quenching temperature is 900 ℃, the heat preservation time is 18 minutes, and the cooling mode is water cooling; tempering and heating for 30 minutes, and cooling by air cooling. The tempering temperature is controlled in the range of 640-660 ℃, and compared with the sleeve without thickening, the tempering heat preservation time is prolonged for 20-40 minutes, which is beneficial to the consistency of the physical properties of the thickened end and the pipe body.
In some embodiments of the invention, the heat treatment process may also be optimized. On the heat treatment production line, a quenching furnace is adopted to heat at 900+/-10 ℃, cloth is arranged tooth by tooth, and the temperature is kept for 20 minutes. Water quenching, water temperature is less than or equal to 35 ℃, and an external spraying and internal axial flow mode (spraying water quantity is more than or equal to 2000 m) is adopted 3 And/h, spraying time is about 40 seconds; inner axial flow rate: not less than 760m 3 And/h, the internal axial flow time is about 40 seconds), so that the steel pipe is fully quenched longitudinally and transversely and uniformly cooled, and the consistency of the performances of the sleeve pipe body and the upsetting end is realized. High-pressure water can be used for dephosphorization, the water pressure is 18-20 Mpa, and the surface of the sleeve is ensured to be free of impurities such as iron scales. Corrosion resistance requirement group for upsetting thickened sleeve of alloyThe weaving is uniform, the tempering is carried out fully, the heating temperature of a tempering furnace can be 650+/-10 ℃, the tooth-by-tooth material is fed, and the heat preservation time can be about 30 minutes.
Optionally, in some embodiments of the invention, the steel pipe is tempered and then subjected to hot straightening, and the temperature of the steel pipe exiting the straightener is more than or equal to 500 ℃. Through the temperature correction process, the residual stress of the alloy steel pipe is effectively reduced, and the anti-extrusion capacity of the alloy steel pipe is improved.
The following is a specific example of a method of producing a petroleum casing for open-window sidetracking according to the present invention. Unless otherwise indicated, the raw materials, equipment, consumables and the like used in the following examples are all available by conventional commercial means.
For those parts of the numerical range, any value in the numerical range defined by the present invention can be selected by one skilled in the art according to actual needs, and is not limited to the numerical values set forth in the specific examples.
Example 1
This example contemplates a petroleum casing that includes the following components in weight percent: c:0.10%, mn:0.20%, cr:0.4%, mo:0.40 percent, less than or equal to 0.45 percent of Si, less than or equal to 1.5 percent of Ni, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and unavoidable impurity elements.
Smelting and continuously casting the raw materials, and rolling into a seamless steel tube. The deformation rate of the perforating machine in the rolling operation is 66.9%, and the deformation rate of the mandrel mill is 18.8%. The tapping temperature of the tube blank during rolling is about 1255 ℃, the initial rolling temperature of the piercing mill is 1190 ℃, the outlet speed of the piercing mill is reduced to about 0.5m/s, and the temperature of the pierced tube blank after piercing is controlled to be about 1235 ℃. And uniformly spraying an antioxidant on the inner surface of the capillary in the rolling process, and uniformly coating a guide disc lubricant on the surface of the guide disc.
Transferring the hot rolled alloy seamless steel tube into an upsetting thickening production line for preparation. After feeding, one end of the tube is aligned, the tube is fed into a No. 1 heating furnace for heating by a walking beam, the heating temperature is 1170 ℃, the heating length is 460mm, the heating time is 80S, and the tube is moved into a lower station for upsetting and thickening. The speed of the horizontal cylinder is 210mm/s, the center of the horizontal cylinder (the thickened part of the punch and the pipe body keep good coaxiality, namely, the coaxiality of the inner circle and the outer circle is 1.0 mm), the upsetting temperature is 1145 ℃, the upsetting stroke is 530mm, and the upsetting force is 228 tons in one-step molding. And then the other end is reversely aligned, and then the material enters a No. 2 heating furnace for heating and a No. 2 thickening machine for thickening according to the same technological parameters, the finished product is discharged (enters a charging basket), and the material is ground on a table and then subjected to size inspection.
Transferring the sleeve pipe with the upsetting and thickening surface qualified in quality and size inspection into a special heat treatment production line, distributing the sleeve pipe in a quenching furnace tooth by tooth, wherein the quenching temperature is 900 ℃, the heat preservation time is 18 minutes, and the cooling mode is water cooling, and the water temperature is 28 ℃. The dephosphorization pressure of the high-pressure water is 18Mpa, and the spraying water quantity is 2200m 3 And/h, spraying time of about 40 seconds, and internal axial flow water volume of 765m 3 And/h, the internal shaft running time is about 40 seconds. Tempering is carried out in a tooth-by-tooth material-step mode in a tempering furnace, the tempering temperature is 660 ℃, the heat preservation time is 30 minutes, and the cooling mode is air cooling.
The alloy steel pipe is tempered and then is straightened at the temperature of 550 ℃ when being discharged out of the straightener. The actual measurement parameters of the petroleum casing size of this example are shown in the following table 2, and the actual results of the mechanical properties of the steel pipes are shown in the following table 3.
TABLE 2 actual measurement parameters of Petroleum casing size
Figure BDA0004117644920000091
TABLE 3 actual results of mechanical properties of steel pipes
Figure BDA0004117644920000101
The residual stress of 88Mpa is actually measured by using the ring cutting method and is lower than 10% of the actual yield strength.
Fig. 4 shows a cross-sectional profile of the sleeve prepared in this example, and fig. 5 shows a cross-sectional profile of the sleeve prepared in this example. As shown in fig. 4-5, the inner and outer surfaces of the sleeve are smooth, the defects of pits, wrinkles and the like are avoided, and the inner and outer transition sections are naturally smooth.
Example 2
This example contemplates a petroleum casing that includes the following components in weight percent: c:0.20%, mn:0.80%, cr:1.20%, mo:0.80 percent, less than or equal to 0.45 percent of Si, less than or equal to 1.5 percent of Ni, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and unavoidable impurity elements.
Smelting and continuously casting the raw materials, and rolling into a seamless steel tube. The deformation rate of the perforating machine in the rolling operation is 66.9%, and the deformation rate of the mandrel mill is 18.8%. The tube blank discharging temperature during rolling is about 1260 ℃, the initial rolling temperature of the piercing mill is 1195 ℃, the outlet speed of the piercing mill is reduced to about 0.5m/s, and the temperature of the pierced tube blank after piercing is controlled to be about 1240 ℃. And uniformly spraying an antioxidant on the inner surface of the capillary in the rolling process, and uniformly coating a guide disc lubricant on the surface of the guide disc.
Transferring the hot rolled alloy seamless steel tube into an upsetting thickening production line for preparation. After feeding, one end of the tube is aligned, the tube is fed into a No. 1 heating furnace for heating by a walking beam, the heating temperature is 1190 ℃, the heating length is 450mm, the heating time is 90S, and the tube is moved into a lower station for upsetting and thickening. The speed of the horizontal cylinder is 228mm/s, the center of the horizontal cylinder (the thickened part of the punch and the pipe body keep good coaxiality, namely, the coaxiality of the inner circle and the outer circle is 1.0 mm), the upsetting temperature is 1160 ℃, the upsetting stroke is 535mm, and the upsetting force is 238 tons in one-step molding. And then the other end is reversely aligned, and then the material enters a No. 2 heating furnace for heating and a No. 2 thickening machine for thickening according to the same technological parameters, the finished product is discharged (enters a charging basket), and the material is ground on a table and then subjected to size inspection.
Transferring the sleeve pipe with qualified upsetting and thickening surface quality and qualified size inspection into a special heat treatment production line, distributing the sleeve pipe in a quenching furnace tooth by tooth, wherein the quenching temperature is 905 ℃, the heat preservation time is 20 minutes, and the cooling mode is water cooling with the water temperature of 30 ℃. The dephosphorization pressure of the high-pressure water is 19Mpa, and the spray water quantity is 2100m 3 And/h, spraying time is about 40 seconds, and the internal axial flow water quantity is 770m 3 And/h, the internal shaft running time is about 40 seconds. Tempering is carried out in a tooth-by-tooth material-step mode in a tempering furnace, the tempering temperature is 650 ℃, the heat preservation time is 30 minutes, and the cooling mode is air cooling.
The alloy steel pipe is tempered and then is straightened at the temperature of 540 ℃ when being discharged out of the straightener. The actual measurement parameters of the petroleum casing size of this example are shown in the following table 4, and the actual results of the mechanical properties of the steel pipes are shown in the following table 5.
TABLE 4 actual measurement parameters of Petroleum casing size
Figure BDA0004117644920000111
TABLE 5 actual results of mechanical properties of Steel pipes
Figure BDA0004117644920000112
The residual stress of 86Mpa is actually measured by using the ring cutting method and is lower than 10% of the actual yield strength.
Example 3
This example contemplates a petroleum casing that includes the following components in weight percent: c:0.35%, mn:1.20%, cr:1.50%, mo:1.0 percent, less than or equal to 0.45 percent of Si, less than or equal to 1.5 percent of Ni, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and unavoidable impurity elements.
Smelting and continuously casting the raw materials, and rolling into a seamless steel tube. The deformation rate of the perforating machine in the rolling operation is 66.9%, and the deformation rate of the mandrel mill is 18.8%. The tapping temperature of the tube blank during rolling is about 1265 ℃, the initial rolling temperature of the piercing mill is 1200 ℃, the outlet speed of the piercing mill is reduced to about 0.5m/s, and the temperature of the pierced tube blank after piercing is controlled to be about 1245 ℃. And uniformly spraying an antioxidant on the inner surface of the capillary in the rolling process, and uniformly coating a guide disc lubricant on the surface of the guide disc.
Transferring the hot rolled alloy seamless steel tube into an upsetting thickening production line for preparation. After feeding, one end of the tube is aligned, the tube is fed into a No. 1 heating furnace for heating by a step beam, the heating temperature is 1180 ℃, the heating length is 460mm, the heating time is 90S, and the tube is moved into a lower station for upsetting and thickening. The speed of the horizontal cylinder is 230mm/s, the center of the horizontal cylinder (the thickened part of the punch and the pipe body keep good coaxiality, namely, the coaxiality of the inner circle and the outer circle is 1.0 mm), the upsetting temperature is 1155 ℃, the upsetting stroke is 540mm, and the upsetting force is 232 tons in one-step molding. And then the other end is reversely aligned, and then the material enters a No. 2 heating furnace for heating and a No. 2 thickening machine for thickening according to the same technological parameters, the finished product is discharged (enters a charging basket), and the material is ground on a table and then subjected to size inspection.
Transferring the sleeve pipe with the upsetting and thickening surface qualified in quality and size inspection into a special heat treatment production line, distributing the sleeve pipe tooth by tooth in a quenching furnace, wherein the quenching temperature is 910 ℃, the heat preservation time is 18 minutes, and the cooling mode is water cooling and the water temperature is 27 ℃. The dephosphorization pressure of the high-pressure water is 20Mpa, and the spray water quantity is 2180m 3 And/h, spraying time of about 40 seconds, and inner axial flow water quantity of 780m 3 And/h, the internal shaft running time is about 40 seconds. Tempering is carried out in a tooth-by-tooth material-step mode in a tempering furnace, the tempering temperature is 655 ℃, the heat preservation time is 30 minutes, and the cooling mode is air cooling.
The alloy steel pipe is tempered and then is straightened at the temperature of 545 ℃ when being discharged out of the straightener. The actual measurement parameters of the petroleum casing size of this example are shown in the following table 6, and the actual results of the mechanical properties of the steel pipes are shown in the following table 7.
TABLE 6 actual measurement parameters of Petroleum casing size
Figure BDA0004117644920000121
TABLE 7 actual results of mechanical properties of steel pipes
Figure BDA0004117644920000122
The residual stress is 89.5Mpa, which is lower than 10% of the actual yield strength, as actually measured by the ring cutting method.
To date, 200 tons of upsetting thickened ultrahigh-strength direct-connection casing have been produced. The indexes of the chemical components, gas content, nonmetallic inclusion, residual stress, hardenability, mechanical property and the like of the steel pipe all reach the level required by upsetting and thickening the sleeve. The construction of well logging in a certain domestic oil field is successful, and the special personalized production requirement of the oil field is met.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims (10)

1. A method of producing a petroleum casing for open-window sidetracking comprising the steps of:
step 1): rolling a casting blank formed by smelting and continuous casting into a steel pipe;
step 2): upsetting and thickening the pipe end of the steel pipe obtained in the step 1);
step 3): and carrying out full-length heat treatment on the upsetting and thickening steel pipe to obtain the petroleum casing pipe.
2. The method of claim 1, wherein the petroleum casing comprises the following components in weight percent: c:0.10 to 0.35 percent, mn:0.20 to 1.20 percent, cr:0.4 to 1.50 percent, mo:0.40 to 1.0 percent, less than or equal to 0.45 percent of Si, less than or equal to 1.5 percent of Ni, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, and the balance of Fe and unavoidable impurity elements.
3. The method according to claim 1, wherein the tube blank tapping temperature of the rolling operation in step 1) is 1255-1265 ℃, the piercing mill start rolling temperature is 1190-1200 ℃, the piercing mill exit speed is reduced to 0.5m/s, and the tube blank temperature after piercing is controlled to 1235-1245 ℃.
4. The method of claim 1, wherein the rolling operation of step 1) has a piercer deformation of 66.9% and a mandrel mill deformation of 18.8%.
5. The method of claim 1, wherein step 1) is a rolling operation in which an antioxidant is uniformly sprayed onto the inner surface of the capillary and a guide lubricant is uniformly applied to the surface of the guide.
6. The method of claim 1 wherein step 2) the upsetting and thickening operation comprises heating the ends of the steel pipe to 1160 ℃ to 1200 ℃ using an intermediate frequency induction furnace, feeding the pipe ends heated pipe blanks into a die cavity for clamping, and then upsetting the pipe blanks forward using a punch to deform the metal in the die cavity formed by the die cavity and the upsetting surface of the punch.
7. The method according to claim 6, wherein the upsetting temperature is controlled to 1100-1200 ℃, the upsetting stroke is controlled to 504-546 mm, and the forming upsetting force is controlled to 216-251 tons.
8. The method of claim 1, wherein the full length heat treatment of step 3) comprises a quench and temper heat treatment.
9. The method of claim 8, wherein the quenching heat treatment comprises heating the steel pipe to 880-920 ℃, maintaining the temperature for 15-25 minutes, water cooling, water temperature less than or equal to 35 ℃, and tempering heat treatment comprises heating the steel pipe to 640-660 ℃, maintaining the temperature for 20-40 minutes, and air cooling to room temperature.
10. The method according to claim 8, wherein the steel pipe is tempered and then subjected to straightening at a temperature of 500 ℃ or higher.
CN202310223424.3A 2023-03-09 2023-03-09 Production method of petroleum casing pipe for window sidetracking Pending CN116274466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310223424.3A CN116274466A (en) 2023-03-09 2023-03-09 Production method of petroleum casing pipe for window sidetracking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310223424.3A CN116274466A (en) 2023-03-09 2023-03-09 Production method of petroleum casing pipe for window sidetracking

Publications (1)

Publication Number Publication Date
CN116274466A true CN116274466A (en) 2023-06-23

Family

ID=86814506

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310223424.3A Pending CN116274466A (en) 2023-03-09 2023-03-09 Production method of petroleum casing pipe for window sidetracking

Country Status (1)

Country Link
CN (1) CN116274466A (en)

Similar Documents

Publication Publication Date Title
CN101285151B (en) Petroleum case pipe with high strength and toughness and producing method thereof
CN102179681B (en) Pipe mold manufacturing process adopting continuous-casting blank to forge and roll rough blank periodically
CN104988403B (en) A kind of oil-gas mining martensitic stainless steel seamless steel pipe and its manufacture method
US8795450B2 (en) Manufacturing method for a steel pipe for fuel injection pipe
US20120118441A1 (en) Method of manufacturing heavy-wall seamless steel pipe
CN100547276C (en) The processing method of austenite seamless stainless steel rectangular water pipe used for turbine generator
CN104946976B (en) Production method of large-diameter thin-wall precise seamless steel pipe for drill pipe of rotary drilling rig
CN103131947A (en) High-performance low-carbon microalloy steel SEW (hot stretch-reducing electric welding) expansion casing and manufacturing method thereof
CN111037243B (en) Manufacturing method of parking gear of gearbox
CN104551669A (en) Production method of cold-drawn high-precision seamless steel tube
CN115013601B (en) Concrete conveying pipe, manufacturing method thereof and concrete pump truck
CN105018836A (en) Manufacturing method for precision seamless steel tube for drill rod of rotary drilling rig
CN110306120B (en) X80 steel grade D1422mm seamless bent pipe and manufacturing method thereof
CN108998650B (en) Method for manufacturing large-caliber thick-wall seamless steel pipe of 630 ℃ ultra-supercritical unit G115
CN105363825A (en) Manufacturing method of cold-drawn high-precision cylinder barrel pipe
CN104759834A (en) Hot-rolled high-strength oil pipe manufacturing method
CN113453812B (en) Steel pipe for fuel injection pipe and fuel injection pipe using same
CN116274466A (en) Production method of petroleum casing pipe for window sidetracking
CN104325259A (en) Manufacturing method of seamless steel pipe piercing plug
CN111663079B (en) Processing technology of high-pressure-resistant seamless steel pipe
CN104388825B (en) The anti-CO of below 150ksi grade of steel that CPE unit produces2the preparation technology of corrosion oil well pipe
CN104759888A (en) Manufacturing method of hot-rolled high-hardness petroleum pipe
CN104551540A (en) Production method of cold-drawn precise cylinder tube
CN101096737A (en) High-strength straight welding oil annular tube steel and manufacturing method thereof
CN104878307A (en) Production method of bainite wear-resistance hot-rolled seamless 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