Development of an improved austenitic drill collar alloy
A metallurgical analysis and property comparison are made among several alloys in the development of an improved, high-strength, nonmagnetic alloy for directional drilling applications. Armco Non-Mag 618 (AN618), a nitrogen-bearing, low-Ni stainless steel, displays significant improvement over T-287 and Gammaloy, previous-generation drill collar alloys. Data are included that show higher-strength AN618 and T-287 to be very stable austenitic alloys, with improved resistance to stress corrosion cracking in solutions that simulate many different downhole conditions, including very high chloride-containing muds at boiling temperatures. Their nonmagnetic stability is excellent, allowing high reliability in directional drilling applications.
- Research Organization:
- Armco Research and Technology, 703 Curtis St., Middletown, OH 45043
- OSTI ID:
- 6094988
- Journal Information:
- Mater. Performance; (United States), Vol. 26:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
DRILLS
DIRECTIONAL DRILLING
SLEEVES
STAINLESS STEELS
CORROSION RESISTANCE
FRACTURE PROPERTIES
AUSTENITIC STEELS
BOILING
CHLORIDES
COMPARATIVE EVALUATIONS
CORROSION RESISTANT ALLOYS
CRACKS
DRILLING FLUIDS
RELIABILITY
ROCK DRILLING
STRESS CORROSION
TEMPERATURE EFFECTS
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CORROSION
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FLUIDS
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
STEELS
360103* - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)
422000 - Engineering- Mining & Underground Engineering- (1980-)