Study of subcritical flow through multiple-orifice valves
Increased oil and gas production from offshore areas and hostile environments has led to a greater use of multiple-orifice-valve (MOV) wellhead chokes. Unlike conventional wellhead chokes, MOV's can be adjusted to any given choke area while under pressure, allowing wells in remote locations to be controlled from a central site. Data on the behavior of multiphase flow through MOV chokes have not been available in the past. This study investigated high-pressure (400 to 800 psia (2.8 to 5.5 MPa)), two-phase air/water flow through a 2-in. (5.1-cm) MOV choke. Single-phase air and water data were obtained to determine the valve-sizing coefficient, C/sub v/. A correlating parameter was determined with two-phase data to predict the subcritical two-phase pressure drop. This parameter was found to be a function of the gas/liquid ratio, upstream pressure, and choke opening. A mathematical model based on experimental observations was developed to predict the subcritical pressure drop across the choke for single-phase liquid flow.
- Research Organization:
- Univ. of Tulsa, OK (US)
- OSTI ID:
- 7041205
- Journal Information:
- SPE (Society of Petroleum Engineers) Product. Eng.; (United States), Vol. 3:1
- Country of Publication:
- United States
- Language:
- English
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Study of multiphase critical flow through wellhead chokes
SUBCRITICAL AND CRITICAL FLOW THROUGH STRAIGHT-THROUGH, ELBOW, AND TEE A-N FITTINGS AND SHARP-EDGED ORIFICES AT ELEVATED TEMPERATURES
Related Subjects
03 NATURAL GAS
42 ENGINEERING
VALVES
FLOW MODELS
HYDRAULICS
LAMINAR FLOW
AIR FLOW
MEDIUM PRESSURE
MULTIPHASE FLOW
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
ORIFICES
TWO-PHASE FLOW
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
GAS FLOW
MATHEMATICAL MODELS
MECHANICS
OPENINGS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)