Drill string component with high corrosion resistance, and method for the production of same
Assigneesvoestalpine BÖHLER Edelstahl GmbH & Co KG, Schoeller-Bleckmann Oilfiend 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.
Claims17
A drill string component, comprising an alloy including the following elements in percent by weight:
- Elements
- Carbon (C)
- 0.01-0.10
- Silicon (Si)
- <0.5
- Manganese (Mn)
- 5.0-6.0
- Phosphorus (P)
- <0.05
- Sulfur (S)
- <0.005
- Chromium (Cr)
- 26.0-28.0
- Molybdenum (Mo)
- 2.5-3.5
- Nickel (Ni)
- 13.0-15.0
- Vanadium (V)
- below detection level
- Tungsten (W)
- below detection level
- Copper (Cu)
- <0.1
- Cobalt (Co)
- below detection level
- Titanium (Ti)
- below detection level
- Aluminum (Al)
- <0.1
- Niobium (Nb)
- below detection level
- Boron (B)
- <0.01
- Nitrogen (N)
- 0.54-0.80
- Iron (Fe) and
- inevitable impurities residual.
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)
- 0.01-0.10
- Silicon (Si)
- <0.5
- Manganese (Mn)
- 5.0-6.0
- Phosphorus (P)
- <0.05
- Sulfur (S)
- <0.005
- Chromium (Cr)
- 26.0-28.0
- Molybdenum (Mo)
- 2.5-3.5
- Nickel (Ni)
- 13.0-15.0
- Vanadium (V)
- below detection level
- Tungsten (W)
- below detection level
- Copper (Cu)
- <0.1
- Cobalt (Co)
- below detection level
- Titanium (Ti)
- below detection level
- Aluminum (Al)
- <0.1
- Niobium (Nb)
- below detection level
- Boron (B)
- <0.005
- Nitrogen (N)
- 0.54-0.80
- Iron (Fe) and
- inevitable impurities residual;
- 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 the alloy.
A steel alloy useful in forming a drill string component, comprising the following elements in percent by weight:
- Elements
- Carbon (C)
- 0.01-0.10
- Silicon (Si)
- <0.5
- Manganese (Mn)
- 5.0-6.0
- Phosphorus (P)
- <0.05
- Sulfur (S)
- <0.005
- Chromium (Cr)
- 26.0-28.0
- Molybdenum (Mo)
- 2.5-3.5
- Nickel (Ni)
- 13.0-15.0
- Vanadium (V)
- below detection level
- Tungsten (W)
- below detection level
- Copper (Cu)
- <0.1
- Cobalt (Co)
- below detection level
- Titanium (Ti)
- below detection level
- Aluminum (Al)
- <0.1
- Niobium (Nb)
- below detection level
- Boron (B)
- <0.01
- Nitrogen (N)
- 0.54-0.80
- Iron (Fe) and
- inevitable impurities residual.
Dependencies are inferred from the claim text.