BOP shear rams for hydrogen sulfide service

Journal Article · Fri Dec 01 00:00:00 EST 1989 · SPE (Society of Petroleum Engineers) Drilling Engineering; (USA)

DOI:https://doi.org/10.2118/16124-PA· OSTI ID:7261171

Canal, J R ^[1]

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1. Shaffer (US)

The shear rams in a blowout preventer (BOP) are critical components of the drilling system, which is expected to shear drillpipe and to seal the wellbore in all types of drilling fluids. The brittleness of high-strength tool steels when exposed to wellbore fluids containing H{sub 2}S has been recognized for many years by the drilling industry. The development in recent years of high-strength materials that are resistant to hydrogen embrittlement has made possible the manufacture of H{sub 2}S-resistant shear rams. This paper describes the fabrication of such shear rams. The cutting edge is made from a cobalt base (UNS R30035) and an iron-based superalloy (UNS S66286) joined by an electron-beam (EB) welding process. The discussion continues with the shearing tests of API 5A grades E, G, and S-135 drillpipe of two wall thicknesses with a 13 5/8-in. (346-mm), 10,000-psi (69-MPa) working-pressure (WP) ram BOP.

• OSTI ID: 7261171
• Journal Information: SPE (Society of Petroleum Engineers) Drilling Engineering; (USA), Vol. 4:4; ISSN 0885-9744
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
47 OTHER INSTRUMENTATION
36 MATERIALS SCIENCE
OIL WELLS
BLOWOUT PREVENTERS
STEELS
BRITTLENESS
CHEMICAL COMPOSITION
CORROSIVE EFFECTS
DRILLING EQUIPMENT
DRILLING FLUIDS
HYDROGEN EMBRITTLEMENT
HYDROGEN SULFIDES
MATERIALS TESTING
WELL DRILLING
ALLOYS
CHALCOGENIDES
DRILLING
EMBRITTLEMENT
EQUIPMENT
FLUIDS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
SULFIDES
SULFUR COMPOUNDS
TESTING
WELLS
020300* - Petroleum- Drilling & Production
440700 - Geophysical & Meteorological Instrumentation- (1990-)
360103 - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion