Multiphase process mixing and measuring system
AssigneesFramo Development (UK) Limited, Norsk Hydro a.s.
InventorsFrank Mohn, Wallace W. Martin
Life of this patent
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Abstract
A liquid is supplied to a vessel (10) to form a pool (21) from which it discharges through a venturi. A supply pipe or pipes (12, 30) convey other liquids and/or gases from separate sources or from above the liquid pool into the venturi for mixing with the liquid. The supply pipes can extend through the pool and be perforated (22) to tend to maintain the level of the pool. Associated with the venturi are pressure sensors (40, 41) for measuring flow and a densiometer (52) permitting mass flow rate measurement of gas and liquid phases. The apparatus can be incorporated in a cartridge (60) for reception in a receptacle (61) at a subsea installation.
Claims21
A method of mixing or homogenizing a liquid and at least one liquid or gaseous fluid, said method comprising forming a pool of said liquid, establishing a flow of said liquid from the pool through a venturi, introducing said at least one fluid into said liquid flow for mixing with the liquid in the venturi, and measuring fluid flow through said venturi by sensing pressure change thereat.
An apparatus for mixing or homogenizing a liquid and at least one liquid or gaseous fluid, said apparatus comprising:
- a vessel,
- inlet means for introducing said liquid into said vessel,
- a discharge duct for discharge of said liquid from said vessel,
- a throat in said discharge duct forming a venturi,
- passage means for supplying said at least one fluid to said duct for mixing with the liquid in said venturi,
- and flowmetering means for measuring flow through said discharge duct, said flowmetering means comprising:
- first and second pressure sensors adapted to provide outputs dependent on sensed fluid pressure,
- means locating said first and second pressure sensors respectively at the entry to said venturi throat and at said throat, said pressure sensors being
- processing means responsive to said pressure sensor outputs to provide an output and
- display and/or recording means responsive to said processing means output.
An apparatus for mixing or homogenizing a liquid and liquid or gaseous fluids, said apparatus comprising:
- a vessel,
- inlet means for introducing said liquid into said vessel,
- a discharge duct for discharge of said liquid from said vessel,
- a throat in said discharge duct forming a venturi, and
- passage means for supplying said fluids to said duct for mixing with the liquid in said venturi, said passage means comprising two concentric tubes communicating with respective fluid sources.
A subsea installation incorporating an apparatus for mixing or homogenizing crude oil and gas, said apparatus comprising:
- a vessel,
- inlet means for introducing said crude oil into said vessel,
- a discharge duct for discharge of said crude oil from said vessel,
- a throat in said discharge duct forming a venturi,
- passage means for supplying said gas to said duct for mixing with said crude oil in said venturi.
Dependencies are inferred from the claim text.