CN112975293A - Bimetal composite continuous oil pipe and preparation method and application thereof - Google Patents

Bimetal composite continuous oil pipe and preparation method and application thereof Download PDF

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Publication number
CN112975293A
CN112975293A CN202110228876.1A CN202110228876A CN112975293A CN 112975293 A CN112975293 A CN 112975293A CN 202110228876 A CN202110228876 A CN 202110228876A CN 112975293 A CN112975293 A CN 112975293A
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composite
bimetal composite
welding
equal
bimetal
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Inventor
任永峰
刘云
毕宗岳
李鸿斌
王涛
赵勇
汪海涛
李小龙
焦炜
赵西岐
张君
包志刚
马佼佼
侯永利
王一岑
徐凯
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China National Petroleum Corp
Baoji Petroleum Steel Pipe Co Ltd
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China National Petroleum Corp
Baoji Petroleum Steel Pipe Co Ltd
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    • 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
    • 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
    • B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • B23P23/06—Metal-working plant comprising a number of associated machines or apparatus
    • 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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/22—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
    • C22C38/42—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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • 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
    • F16L9/17—Rigid pipes obtained by bending a sheet longitudinally and connecting the edges
    • 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

Abstract

The invention belongs to the technical field of coiled tubing, and relates to a bimetal composite coiled tubing, and a preparation method and application thereof. The bimetal composite continuous oil pipe comprises a base layer and a composite layer, wherein the base layer is arranged on the periphery of the composite layer, the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, and the thickness of the base layer is larger than that of the composite layer. The preparation method of the bimetal composite continuous oil pipe comprises the following steps: step 1, preparing a bimetal composite coiled plate; step 2, longitudinal shearing and steel strip lengthening of the bimetal composite coiled plate; step 3, forming and welding; step 4, heat treatment of welding seams; and 5: and (4) continuously curling. The base layer of the bimetal composite pipe is made of one of carbon steel and alloy steel, and the clad layer is made of stainless steel or nickel-based alloy, so that the production cost of the stainless steel continuous pipe is effectively reduced, and the bimetal composite pipe suitable for the high-H-content continuous pipe is developed2S、CO2、Cl‑The bimetallic composite coiled tubing used in the acid oil and gas field environment.

Description

Bimetal composite continuous oil pipe and preparation method and application thereof
Technical Field
The invention belongs to the technical field of coiled tubing, and relates to a bimetal composite coiled tubing, and a preparation method and application thereof.
Background
The coiled tubing is widely applied to the fields of oil field well repair, well drilling, well completion, well logging, production increase and the like in the petroleum and natural gas industry, and the tubing on the reel can be repeatedly collected and used during operation. However, in the process of developing a high-acidity oil-gas field containing H2S, CO2 and Cl-corrosion media, the common continuous pipe not only generates weight loss corrosion and local corrosion with high corrosion rate, but also H2S acid corrosion easily causes Hydrogen Induced Cracking (HIC) and Sulfide Stress Corrosion Cracking (SSCC), and the development of the acid oil-gas field is restricted. Research shows that with the increase of the alloy element Cr, the corrosion resistance of the material is also improved, and the materials such as 3Cr, 13Cr, 16Cr, 22Cr, 25Cr and the like are ideal corrosion-resistant materials. But the manufacturing cost of the corrosion-resistant pipe and the oil gas exploitation cost are increased due to the addition of a large amount of expensive alloy elements.
Disclosure of Invention
The invention aims to provide a bimetal composite coiled tubing and a preparation method and application thereof, and solves the problems that the existing carbon steel coiled tubing is poor in corrosion resistance and the corrosion-resistant alloy coiled tubing is high in price.
The realization process of the invention is as follows:
the bimetal composite continuous oil pipe comprises a base layer and a composite layer, wherein the base layer is arranged on the periphery of the composite layer, the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, and the thickness of the base layer is larger than that of the composite layer.
Further, the carbon steel material comprises the following chemical components in percentage by mass:
c: 0.20 to 0.35%, Si: 0.10 to 1.00%, Mn: 0.10-1.20%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 0.2 to 0.5%, Cu: 0.1 to 0.5%, Mo: less than or equal to 0.14 percent, and the balance of Fe and inevitable impurities.
Further, the chemical components of the corrosion-resistant alloy material are as follows by mass percent:
c: less than or equal to 0.03%, Si: less than or equal to 1.00 percent, Mn: 1.00-2.00%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 18-25%, Ni: 10-60.0%, Cu: 1.2-3.5%, N: 0.20 to 0.30%, Mo: less than or equal to 0.3 percent, and the balance of Fe and inevitable impurities.
Furthermore, the yield strength of the carbon steel material is more than or equal to 552MPa, and the tensile strength of the carbon steel material is more than or equal to 621 MPa; the yield of the corrosion-resistant alloy material is more than or equal to 550MPa, and the tensile strength of the corrosion-resistant alloy material is more than or equal to 620 MPa; the outer diameter range of the bimetal composite continuous oil pipe is phi 25.4-phi 88.9mm, the length range is 61-10000 m, and the wall thickness range is as follows: 1.9-6.4 mm, multiple layers: 0.8-1.2 mm.
The preparation method of the bimetal composite continuous oil pipe comprises the following steps:
step 1, preparing the bimetal composite coiled plate
The bimetal composite coiled plate comprises a base layer and a composite layer, wherein the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, the thickness of the base layer is larger than that of the composite layer, and the base layer and the composite layer are compounded together by explosion rolling to obtain the bimetal composite coiled plate;
step 2, longitudinal shearing and steel strip lengthening of the bimetal composite coiled plate
Shearing the bimetal composite coiled plate prepared in the step 1 into a steel strip with the thickness of 50-300 mm by a longitudinal shearing unit according to the specification requirement of a continuous tube; processing the end heads of the front and the rear steel strips into grooves of 45-60 degrees, carrying out butt welding on the two steel strips by adopting gas shielded laser welding, argon arc welding or plasma welding, and polishing and cleaning the surfaces of welding seams after the welding seams are cooled; then heating the welding seam and the heat affected zone to 860-930 ℃ again in a protective atmosphere, preserving the heat for 30-300 s, and cooling the welding seam and the heat affected zone to normal temperature at a cooling speed of more than 15 ℃/s to obtain a lengthened steel strip;
step 3, forming and welding
Planning the side surface of the lengthened steel belt into an I-shaped groove by adopting an edge milling method according to the requirements of the outer diameter and the wall thickness of the final bimetal composite continuous oil pipe, accurately controlling the width of the lengthened steel belt and the verticality of the plate edge, and controlling the steel belt to be formed by adopting a roller arrangement forming method; utilizing a laser-arc composite welding technology to longitudinally weld the formed steel belt to form the bimetal composite continuous oil pipe;
step 4, heat treatment of welding seams:
after welding, heating the welding seam of the bimetal composite continuous oil pipe to 900-1100 ℃ by adopting a medium-frequency induction heating mode, preserving heat for 60-100 s, fully ensuring that the structure of the bimetal composite continuous oil pipe is fully changed at the temperature, namely achieving the group homogenization of the welding seam and a matrix, and carrying out welding seam heat treatment;
and 5: and (3) continuous curling:
and winding the bimetal composite coiled tubing subjected to heat treatment of the welding seam on a winding drum with a proper core diameter through a winding machine, and continuously producing the bimetal composite coiled tubing with the length of 61-10000 m.
Further, in step 2, the groove is in an I shape.
Further, in the step 3, the specific parameters of the laser-arc hybrid welding technology are 3-6 kW of laser power, 1.2-5 m/min of speed, 1.0-1.5 μm of laser wavelength and 0.2-0.4 mm of spot diameter.
The bimetal composite coiled tubing has high H content2S、CO2、Cl-The application in the acid oil and gas field environment.
The invention has the following positive effects:
(1) the invention adoptsThe base layer of the bimetal composite pipe is made of one of carbon steel and alloy steel, and the clad layer is made of stainless steel or nickel-based alloy, so that the production cost of the stainless steel continuous pipe is effectively reduced, and the bimetal composite pipe suitable for the high-H-content continuous pipe is developed2S、CO2、Cl-The bimetallic composite coiled tubing used in the acid oil and gas field environment.
(2) The formed bimetal composite continuous oil pipe adopts a laser-arc composite welding mode, so that the welding efficiency is improved, the welding seam is formed beautifully, and a larger depth-to-width ratio can be obtained. Meanwhile, the laser-arc hybrid welding has the advantages of high cooling speed, narrow fusion width and small heat affected zone, reduces the heat effect of welding heat input on the pipe body, and improves the complicated process of separately welding carbon steel and stainless steel.
(3) The bimetal composite continuous oil pipe obtained by the invention has the characteristics of moderate price, excellent corrosion resistance and the like, and different multiple layers are selected to be combined according to the well and mine environment, so that the purposes of making the best use of things and saving cost are achieved.
Drawings
FIG. 1 is a schematic structural diagram of the bimetallic composite coiled plate in step 1;
FIG. 2 is a schematic diagram of the end heads of the front and rear steel belts processed into 45-degree bevels in step 2;
FIG. 3 is a schematic view of a weld and a heat affected zone in step 2;
fig. 4 is a schematic view of the row roller forming in step 3.
Detailed Description
The present invention will be further described with reference to the following examples.
The invention provides a bimetal composite coiled tubing and a preparation method and application thereof, aiming at solving the problems that the existing carbon steel coiled tubing is poor in corrosion resistance and the corrosion-resistant alloy coiled tubing is expensive.
The bimetal composite continuous oil pipe comprises a base layer and a composite layer, wherein the base layer is arranged on the periphery of the composite layer, the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, and the thickness of the base layer is larger than that of the composite layer. The carbon steel material comprises the following chemical components in percentage by mass: c: 0.20 to 0.35%, Si: 0.10 to 1.00%, Mn: 0.10-1.20%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 0.2 to 0.5%, Cu: 0.1 to 0.5%, Mo: less than or equal to 0.14 percent, and the balance of Fe and inevitable impurities. The corrosion-resistant alloy material comprises the following chemical components in percentage by mass: c: less than or equal to 0.03%, Si: less than or equal to 1.00 percent, Mn: 1.00-2.00%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 18-25%, Ni: 10-60.0%, Cu: 1.2-3.5%, N: 0.20 to 0.30%, Mo: less than or equal to 0.3 percent, and the balance of Fe and inevitable impurities. The yield strength of the carbon steel material is more than or equal to 552MPa, and the tensile strength of the carbon steel material is more than or equal to 621 MPa; the yield of the corrosion-resistant alloy material is more than or equal to 550MPa, and the tensile strength of the corrosion-resistant alloy material is more than or equal to 620 MPa; the outer diameter range of the bimetal composite continuous oil pipe is phi 25.4-phi 88.9mm, the length range is 61-10000 m, and the wall thickness range is as follows: 1.9-6.4 mm, multiple layers: 0.8-1.2 mm.
Example 1 bimetal composite coiled tubing
The bimetal composite continuous oil pipe comprises a base layer and a composite layer, wherein the base layer is arranged on the periphery of the composite layer, the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, and the thickness of the base layer is larger than that of the composite layer. The carbon steel material comprises the following chemical components in percentage by mass: c: 0.20 to 0.35%, Si: 0.10 to 1.00%, Mn: 0.10-1.20%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 0.2 to 0.5%, Cu: 0.1 to 0.5%, Mo: less than or equal to 0.14 percent, and the balance of Fe and inevitable impurities. The corrosion-resistant alloy material comprises the following chemical components in percentage by mass: c: less than or equal to 0.03%, Si: less than or equal to 1.00 percent, Mn: 1.00-2.00%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 18-20%, Ni: 12-60.0%, Cu: 1.2-3.5%, N: 0.20 to 0.30%, Mo: less than or equal to 0.3 percent, and the balance of Fe and inevitable impurities. The yield strength of the carbon steel material is 570MPa, and the tensile strength of the carbon steel material is 635 MPa; the yield of the corrosion-resistant alloy material is 565MPa, and the tensile strength of the corrosion-resistant alloy material is 640 MPa; the outer diameter range of the bimetal composite continuous oil pipe is phi 25.4-phi 88.9mm, the length range is 61-10000 m, and the wall thickness range is as follows: 1.9-6.4 mm, multiple layers: 0.8-1.2 mm.
Example 2
The bimetal composite continuous oil pipe comprises a base layer and a composite layer, wherein the base layer is arranged on the periphery of the composite layer, the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, and the thickness of the base layer is larger than that of the composite layer. The carbon steel material comprises the following chemical components in percentage by mass: c: 0.20 to 0.35%, Si: 0.10 to 1.00%, Mn: 0.10-1.20%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 0.2 to 0.5%, Cu: 0.1 to 0.5%, Mo: less than or equal to 0.14 percent, and the balance of Fe and inevitable impurities. The corrosion-resistant alloy material comprises the following chemical components in percentage by mass: c: less than or equal to 0.03%, Si: less than or equal to 1.00 percent, Mn: 1.00-2.00%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 18-25%, Ni: 10-20.0%, Cu: 2-3.5%, N: 0.20 to 0.30%, Mo: less than or equal to 0.3 percent, and the balance of Fe and inevitable impurities. The yield strength of the carbon steel material is 552MPa, and the tensile strength of the carbon steel material is 621 MPa; the yield of the corrosion-resistant alloy material is 550MPa, and the tensile strength of the corrosion-resistant alloy material is 620 MPa; the outer diameter range of the bimetal composite continuous oil pipe is phi 25.4-phi 88.9mm, the length range is 61-10000 m, and the wall thickness range is as follows: 1.9-6.4 mm, multiple layers: 0.8-1.2 mm.
Preparation method for matching of bimetal composite continuous oil pipe in embodiment 3 and embodiment 1
The preparation method of the bimetal composite coiled tubing (see fig. 1-4) in the embodiment comprises the following steps:
step 1, preparing the bimetal composite coiled plate
The bimetal composite coiled plate comprises a base layer and a composite layer, wherein the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, the thickness of the base layer is larger than that of the composite layer, and the base layer and the composite layer are compounded together by explosion rolling to obtain the bimetal composite coiled plate; placing a base layer plate below, placing a composite layer plate above, placing a certain distance between the two layers, then spreading explosive on the composite layer, its thickness is uniform, placing detonator in the middle to detonate explosive, making the stainless steel plate quickly impact on carbon steel plate, and making the interface instantaneously melt due to large impact force, then solidifying. The interface is generally wave-shaped, and generally needs to be leveled after frying or hot rolled again, and is rolled to be as long as the rolling surface.
Step 2, longitudinal shearing and steel strip lengthening of the bimetal composite coiled plate
Shearing the bimetal composite coiled plate prepared in the step 1 into a steel strip with the thickness of 50-300 mm by a longitudinal shearing unit according to the specification requirement of a continuous tube; processing the end heads of the front and the rear steel strips into 45-60-degree grooves (the grooves are selected according to different plate thicknesses, the 45-degree groove is selected when the thickness of a base layer is 1.9-3 mm, and the groove angle is selected to be larger after the thickness is larger), then processing the grooves, wherein the grooves are I-shaped, butt welding is carried out on the two steel strips by adopting gas-shielded laser welding, argon arc welding or plasma welding, and after the welding seam is cooled, the surface of the welding seam is polished and cleaned; then heating the welding seam and the heat affected zone to 860-930 ℃ again in a protective atmosphere, preserving the heat for 30-300 s, and cooling the welding seam and the heat affected zone to normal temperature at a cooling speed of more than 15 ℃/s to obtain a lengthened steel strip;
step 3, forming and welding
Planning the side surface of the lengthened steel belt into an I-shaped groove by adopting an edge milling method according to the requirements of the outer diameter and the wall thickness of the final bimetal composite continuous oil pipe, accurately controlling the width of the lengthened steel belt and the verticality of the plate edge, and controlling the steel belt to be formed by adopting a roller arrangement forming method; utilizing a laser-arc composite welding technology to longitudinally weld the formed steel strip, thereby obtaining larger fusion depth and welding speed, and welding the steel strip into the bimetal composite continuous oil pipe;
step 4, heat treatment of welding seams:
after welding, heating the welding seam of the bimetal composite continuous oil pipe to 900-1100 ℃ by adopting a medium-frequency induction heating mode, preserving heat for 60-100 s, fully ensuring that the structure of the bimetal composite continuous oil pipe is fully changed at the temperature, namely achieving the group homogenization of the welding seam and a matrix, and carrying out welding seam heat treatment;
and 5: and (3) continuous curling:
and winding the bimetal composite coiled tubing subjected to heat treatment of the welding seam on a winding drum with a proper core diameter through a winding machine, and continuously producing the bimetal composite coiled tubing with the length of 61-10000 m.
The specific parameters of the laser-arc hybrid welding technology are 3-6 kW of laser power, 1.2-5 m/min of speed, 1.0-1.5 mu m of laser wavelength and 0.2-0.4 mm of spot diameter.
In the method, because the thermal expansion coefficients of the base layer and the multi-layer metal are different, two materials with smaller difference of the thermal expansion coefficients of the base layer and the multi-layer metal are selected, and the carbon steel material selected in the embodiment can be carbon steel with good mechanical properties, such as Q245R, Q345R and the like; the corrosion-resistant alloy material can be 304, 316L, 625 and other stainless steels with good corrosion resistance. The base layer and the multiple layers are compounded together by explosion rolling, the multiple layers are only a few millimeters thick, the cost is greatly saved, and various mechanical properties of the base material are not changed. The forming method of the row rollers is a UOE row roller forming method.
Example 4 the bimetallic composite coiled tubing of example 1 was run at high H2S、CO2、Cl-The application in the acid oil and gas field environment is as follows:
the test conditions are as follows: na (Na)++K+：5.391×103mg/l，Ca2+：6.553×103mg/l，Mg2+：2.39×102mg/l，HCO3-：2.25×102mg/l，SO4 2-：719×102mg/l，Cl-：1.9794×104mg/l, total mineralization: 3.2921X 104mg/l
CO2Gas pressure: 3MPa, hydrogen sulfide pressure: 1.0MPa, the experimental temperature is 105 ℃, the linear velocity is 3m/s, and the experimental time is 168 hours; corrosion rate: 0.23 mm/a.
In the invention, the medium-frequency induction heating mode is to generate eddy current in a workpiece arranged in an induction coil by utilizing the principle of electromagnetic induction, so that the workpiece is heated to the required temperature. The device employs series resonance or parallel resonance, and thus the power factor is high. Compared with the traditional heating mode, the method has the advantages of high efficiency, small pollution and the like. The device has wide application in the industries of forging, metal heat treatment and the like.
In step 3 of the invention, the row roller forming method is specifically a W bending forming method, which adopts a double-radius eccentric mode to generate an elliptical effect by alternately arranging flat rollers and vertical rollers, thereby playing a great role in improving the form and position tolerance grade of the steel pipe, overcoming the adverse factors of steel strip resilience, distortion and the like, and improving the quality of the finished product pipe.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and is not intended to limit the invention to the particular forms disclosed. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (8)

1. A bimetal composite coiled tubing is characterized in that: the composite coating comprises a base layer and a composite layer, wherein the base layer is arranged on the periphery of the composite layer, the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, and the thickness of the base layer is larger than that of the composite layer.
2. The bimetal composite coiled tubing of claim 1, wherein the carbon steel material comprises the following chemical components in percentage by mass:
c: 0.20 to 0.35%, Si: 0.10 to 1.00%, Mn: 0.10-1.20%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 0.2 to 0.5%, Cu: 0.1 to 0.5%, Mo: less than or equal to 0.14 percent, and the balance of Fe and inevitable impurities.
3. The bimetal composite coiled tubing of claim 1, wherein the corrosion-resistant alloy material comprises the following chemical components in percentage by mass:
c: less than or equal to 0.03%, Si: less than or equal to 1.00 percent, Mn: 1.00-2.00%, P: less than or equal to 0.050%, S: less than or equal to 0.005 percent, Cr: 18-25%, Ni: 10-60.0%, Cu: 1.2-3.5%, N: 0.20 to 0.30%, Mo: less than or equal to 0.3 percent, and the balance of Fe and inevitable impurities.
4. The bimetallic composite coiled tubing of claim 1, wherein: the yield strength of the carbon steel material is more than or equal to 552MPa, and the tensile strength of the carbon steel material is more than or equal to 621 MPa; the yield of the corrosion-resistant alloy material is more than or equal to 550MPa, and the tensile strength of the corrosion-resistant alloy material is more than or equal to 620 MPa; the outer diameter range of the bimetal composite continuous oil pipe is phi 25.4-phi 88.9mm, the length range is 61-10000 m, and the wall thickness range is as follows: 1.9-6.4 mm, multiple layers: 0.8-1.2 mm.
5. The method for preparing the bimetal composite coiled tubing of any one of claims 1 to 4, which is characterized by comprising the following steps:
step 1, preparing the bimetal composite coiled plate
The bimetal composite coiled plate comprises a base layer and a composite layer, wherein the base layer is made of carbon steel, the composite layer is made of corrosion-resistant alloy, the thickness of the base layer is larger than that of the composite layer, and the base layer and the composite layer are compounded together by explosion rolling to obtain the bimetal composite coiled plate;
step 2, longitudinal shearing and steel strip lengthening of the bimetal composite coiled plate
Shearing the bimetal composite coiled plate prepared in the step 1 into a steel strip with the thickness of 50-300 mm by a longitudinal shearing unit according to the specification requirement of a continuous tube; processing the end heads of the front and the rear steel strips into grooves of 45-60 degrees, carrying out butt welding on the two steel strips by adopting gas shielded laser welding, argon arc welding or plasma welding, and polishing and cleaning the surfaces of welding seams after the welding seams are cooled; then heating the welding seam and the heat affected zone to 860-930 ℃ again in a protective atmosphere, preserving the heat for 30-300 s, and cooling the welding seam and the heat affected zone to normal temperature at a cooling speed of more than 15 ℃/s to obtain a lengthened steel strip;
step 3, forming and welding
Planning the side surface of the lengthened steel belt into an I-shaped groove by adopting an edge milling method according to the requirements of the outer diameter and the wall thickness of the final bimetal composite continuous oil pipe, accurately controlling the width of the lengthened steel belt and the verticality of the plate edge, and controlling the steel belt to be formed by adopting a roller arrangement forming method; utilizing a laser-arc composite welding technology to longitudinally weld the formed steel belt to form the bimetal composite continuous oil pipe;
step 4, heat treatment of welding seams:
after welding, heating the welding seam of the bimetal composite continuous oil pipe to 900-1100 ℃ by adopting a medium-frequency induction heating mode, preserving heat for 60-100 s, fully ensuring that the structure of the bimetal composite continuous oil pipe is fully changed at the temperature, namely achieving the group homogenization of the welding seam and a matrix, and carrying out welding seam heat treatment;
and 5: and (3) continuous curling:
and winding the bimetal composite coiled tubing subjected to heat treatment of the welding seam on a winding drum with a proper core diameter through a winding machine, and continuously producing the bimetal composite coiled tubing with the length of 61-10000 m.
6. The preparation method of the bimetal composite coiled tubing of claim 5, which is characterized in that: in step 2, the groove is in an I shape.
7. The preparation method of the bimetal composite coiled tubing of claim 5, which is characterized in that: in the step 3, the specific parameters of the laser-arc hybrid welding technology are 3-6 kW of laser power, 1.2-5 m/min of speed, 1.0-1.5 mu m of laser wavelength and 0.2-0.4 mm of spot diameter.
8. The bimetallic composite coiled tubing of any one of claims 1 to 4 at high H content2S、CO2、Cl-The application in the acid oil and gas field environment.
CN202110228876.1A 2021-03-02 2021-03-02 Bimetal composite continuous oil pipe and preparation method and application thereof Pending CN112975293A (en)

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Application publication date: 20210618