Shear ram use affected by accumulator size
- Gulf Canada Resources Ltd., Calgary (CA)
On many onshore drilling operations, once the annular blowout preventer (BOP) is closed, there may be insufficient remaining accumulator pressure to shear the drill pipe immediately. Initial function tests of several onshore accumulator systems identified significant differences between actual and calculated remaining system pressure. The remaining system pressure becomes important because various drill pipe sizes, weights, and grades require different shearing pressures. The temperature and pressure drops associated with nitrogen expansion (accumulator gas) after BOP functioning dramatically impact remaining system pressure. Subsequent to the last Lodgepole blowout in October 1982 and the issuance in July 1987 of the Alberta Recommended Practices (ARPs) for Drilling Critical Sour Wells, the Energy Resources and Conservation Board (ERCB) has required shear rams for many critical sour wells. A critical sour well, according to ERCB, is a classification based on H{sub 2}S release rate potential and well proximity to populated centers. This paper reports on a study of accumulator systems because little onshore operational data on shear ram deployment were available.
- OSTI ID:
- 5432854
- Journal Information:
- Oil and Gas Journal; (United States), Vol. 89:31; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
29 ENERGY PLANNING
POLICY AND ECONOMY
42 ENGINEERING
ACCUMULATORS
PRESSURE GRADIENTS
CANADA
OFFSHORE OPERATIONS
REGULATIONS
WELL DRILLING
DRILL PIPES
SIZE
ONSHORE SITES
BLOWOUT PREVENTERS
BLOWOUTS
NATURAL GAS WELLS
OIL WELLS
PRESSURE DROP
RECOMMENDATIONS
TEMPERATURE GRADIENTS
WEIGHT
ACCIDENTS
CONTAINERS
DEVELOPED COUNTRIES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
NORTH AMERICA
PIPES
TANKS
WELLS
020600* - Petroleum- Health & Safety
294002 - Energy Planning & Policy- Petroleum
423000 - Engineering- Marine Engineering- (1980-)
021000 - Petroleum- Legislation & Regulations