A kind of simncrnimo low-carbon martensitic steel, drilling rig suspension ring and manufacturing method thereof

A manufacturing method and martensitic steel technology, applied in the field of drilling rig rings and their manufacturing, SiMnCrNiMo low carbon martensitic steel, can solve the problem of low impact absorption energy, achieve excellent performance, reduce inclusions and harmful microstructures. The effect of forming and improving hardenability

Active Publication Date: 2022-03-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming of the low impact absorption energy of the existing drilling rig suspension ring material under low temperature conditions, and provide a SiMnCrNiMo low-carbon martensitic steel, drilling rig suspension ring and its manufacturing method, in order to ensure that the suspension ring has a higher low-temperature impact Reduce manufacturing costs under the premise of absorbing energy

Method used

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  • A kind of simncrnimo low-carbon martensitic steel, drilling rig suspension ring and manufacturing method thereof
  • A kind of simncrnimo low-carbon martensitic steel, drilling rig suspension ring and manufacturing method thereof
  • A kind of simncrnimo low-carbon martensitic steel, drilling rig suspension ring and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method of manufacturing a suspension ring, comprising the steps of:

[0037] (1) Refining the components of Example 1 in Table 1 to obtain a diameter of 600mm billet ingot, by mass percentage, including the following components:

[0038] C: 0.16%; Si: 0.30%; Mn: 1.5%; Cr: 0.4%; Mo: 0.50%; Ni: 3.5%; , [H]: 0.5ppm, the rest is iron and unavoidable impurities;

[0039] (2) Heating the billet ingot evenly, heating it to 1180°C for forging, controlling the forging termination temperature to 850°C, and obtaining a round steel with a diameter of 330-340mm, after forging, the surface temperature is lowered to 400°C for furnace cooling;

[0040] (4) Reheat the round steel to 1180°C for forging, the forging termination temperature is controlled at 850°C, and the forging ring sample is obtained with a diameter of 130-135mm;

[0041] (5) Heat the suspension ring sample to 910-920°C, keep it warm for 3 hours, air-cool to room temperature, then heat it to 880-890°C, keep it warm ...

Embodiment 2

[0044] A method of manufacturing a suspension ring, comprising the steps of:

[0045] (1) Refining is carried out by the component of Table 1 Example 2, and the obtained diameter is the 620mm steel billet ingot, by mass percentage, comprising the following components:

[0046] C: 0.18%; Si: 0.45%; Mn: 1.4%; Cr: 0.5%; Mo: 0.45%; Ni: 3.8%; Al: 0.03%, V: 0.07%; [N]: 80ppm; S: 0.007% And P: 0.01%, [H]: 1ppm, the rest is iron and unavoidable impurities;

[0047] (2) Heating the billet casting ingot evenly, heating the temperature to 1170°C for forging, controlling the forging termination temperature to 850°C, forging to obtain a round steel with a diameter of 340-350mm, and reducing the surface temperature to 420°C for furnace cooling after forging;

[0048] (4) Reheat the round steel to 1170°C for forging, the forging termination temperature is controlled at 850°C, and the forging ring sample is obtained with a diameter of 136-140mm;

[0049] (5) Heat the suspension ring sample ...

Embodiment 3

[0052] A method of manufacturing a suspension ring, comprising the steps of:

[0053] (1) Refining is carried out by the component of embodiment 3 in table 1, and obtaining diameter is 660mm billet ingot, and it comprises following component by mass percentage:

[0054] C: 0.20%; Si: 0.45%; Mn: 1.2%; Cr: 0.6%; Mo: 0.35%; Ni: 3.9%; Al: 0.02%, V: 0.08%; [N]: 50ppm; S: 0.008% And P: 0.007%, [H]: 0.3ppm, the rest is iron and unavoidable impurities;

[0055] (2) Heating the billet ingot evenly, heating it to 1190°C for forging, controlling the forging end temperature to 850°C, forging round steel with a diameter of 335-350 mm, and reducing the surface temperature to 450°C for furnace cooling after forging;

[0056] (4) Reheat the round steel to 1190°C for forging, the forging termination temperature is controlled at 850°C, and the forging ring sample is obtained with a diameter of 135-140mm;

[0057] (5) Heat the suspension ring sample to 915-930°C, keep it warm for 2.8h, air-coo...

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Abstract

The invention discloses a SiMnCrNiMo low-carbon martensitic steel, a drilling rig suspension ring and a manufacturing method thereof, belonging to the field of petroleum equipment manufacturing. The manufacturing method of the drilling rig suspension ring of the present invention greatly improves the hardenability of the steel used for the suspension ring through the synergistic cooperation between chemical elements, and performs high-temperature quenching treatment on the suspension ring sample, so that the content of the lath martensite is significantly higher than the current The material is used, and the deformation is small, which greatly reduces the formation of inclusions and harmful structures, ensuring the high strength and toughness of the suspension ring; followed by low-temperature tempering, which fully eliminates the residual stress formed during the quenching process and improves the toughness of the quenched martensite , and effectively avoid the emergence of temper brittleness, and give full play to the advantages of high strength and toughness of quenched martensite.

Description

technical field [0001] The invention belongs to the field of petroleum equipment manufacturing, in particular to a SiMnCrNiMo low-carbon martensitic steel, a drilling rig suspension ring and a manufacturing method thereof. Background technique [0002] The lifting ring is an important lifting component of the oil drilling rig. It is a solid bar forging and mainly bears tensile load and fatigue load. With the popularization and application of ultra-deep well drilling rigs, the requirements for the lifting capacity of the lifting ring are getting higher and higher, and the diameter of the lifting ring is getting larger and larger. In order to ensure the overall service safety of the lifting ring, it is required that its entire section have consistent mechanical properties, especially the center position It has high strength and toughness, which requires the steel for rings to have sufficient hardenability and toughness. [0003] CN100453683 proposes a low-temperature high-str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46B21J5/00C21D9/40C22C33/04C21D1/18C21D1/30
CPCC22C38/02C22C38/04C22C38/44C22C38/06C22C38/46C22C33/04B21J5/002C21D9/40C21D1/18C21D1/30C21D2211/008
Inventor 李方坡
Owner BC P INC CHINA NAT PETROLEUM CORP
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