Drill string component with high corrosion resistance, and method for the production of same
Assigneesvoestalpine BÖHLER Edelstahl GmbH & Co KG, Schoeller-Bleckmann Oilfield Technology GmbH
InventorsRainer FLUCH, Andreas KEPLINGER, Martin WÖLS, Bernd HOLPER, Walter SPRUZINA
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Abstract
A drill string component, in particular a drilling collar component, an MWD component, or an LWD component for use in oilfield technology and particularly in deep drilling, is provided. A method of making a drill string component, and a steel alloy useful in making a drill string component, are also provided.
Claims24
A drill string component, comprising an alloy including the following elements in percent by weight:
- Elements
- Carbon (C)
- 0.01-0.25
- Silicon (Si)
- <0.5
- Manganese (Mn)
- 3.0-8.0
- Phosphorus (P)
- <0.05
- Sulfur (S)
- <0.005
- Iron (Fe) and
- inevitable impurities
- residual
- Chromium (Cr)
- 23.0-30.0
- Molybdenum (Mo)
- 2.0-4.0
- Nickel (Ni)
- 10.0-16.0
- Vanadium (V)
- <0.5
- Tungsten (W)
- <0.5
- Copper (Cu)
- <0.5
- Cobalt (Co)
- <5
- Titanium (Ti)
- <0.1
- Aluminum (Al)
- <0.2
- Niobium (Nb)
- <0.1
- Boron (B)
- <0.01
- Nitrogen (N)
- 0.50-0.90
A method for producing a drill string component,
- comprising the steps of:
- providing an alloy including the following elements in percent by weight:
- Elements
- Carbon (C)
- 0.01-0.25
- Silicon (Si)
- <0.5
- Manganese (Mn)
- 3.0-8.0
- Phosphorus (P)
- <0.05
- Sulfur (S)
- <0.005
- Iron (Fe) and
- inevitable impurities
- residual
- Chromium (Cr)
- 23.0-30.0
- Molybdenum (Mo)
- 2.0-4.0
- Nickel (Ni)
- 10.0-16.0
- Vanadium (V)
- <0.5
- Tungsten (W)
- <0.5
- Copper (Cu)
- <0.5
- Cobalt (Co)
- <5.0
- Titanium (Ti)
- <0.1
- Aluminum (Al)
- <0.2
- Niobium (Nb)
- <0.1
- Boron (B)
- <0.01
- Nitrogen (N)
- 0.50-0.90;
- melting the alloy;
- subjecting the alloy to secondary metallurgical processing;
- casting the alloy into blocks;
- solidifying the alloy;
- heating and immediately hot forming the alloy;
- cold forming and mechanically processing the alloy.
A steel alloy useful in forming a drill string component, comprising the following elements in percent by weight:
- Elements
- Carbon (C)
- 0.01-0.25
- Silicon (Si)
- <0.5
- Manganese (Mn)
- 3.0-8.0
- Phosphorus (P)
- <0.05
- Sulfur (S)
- <0.005
- Iron (Fe) and
- inevitable impurities
- residual
- Chromium (Cr)
- 23.0-30.0
- Molybdenum (Mo)
- 2.0-4.0
- Nickel (Ni)
- 10.0-16.0
- Vanadium (V)
- <0.5
- Tungsten (W)
- <0.5
- Copper (Cu)
- <0.5
- Cobalt (Co)
- <5.0
- Titanium (Ti)
- <0.1
- Aluminum (Al)
- <0.2
- Niobium (Nb)
- <0.1
- Boron (B)
- <0.01
- Nitrogen (N)
- 0.50-0.90.
Dependencies are inferred from the claim text.