System for pressure letdown of abrasive slurries
Abstract
A system and method for releasing erosive slurries from containment at high pressure without subjecting valves to highly erosive slurry flow. The system includes a pressure letdown tank disposed below the high-pressure tank, the two tanks being connected by a valved line communicating the gas phases and a line having a valve and choke for a transfer of liquid into the letdown tank. The letdown tank has a valved gas vent and a valved outlet line for release of liquid. In operation, the gas transfer line is opened to equalize pressure between tanks so that a low level of liquid flow occurs. The letdown tank is then vented, creating a high-pressure differential between the tanks. At this point, flow between tanks is controlled by the choke. High-velocity, erosive flow through a high-pressure outlet valve is prevented by equalizing the start up pressure and thereafter limiting flow with the choke.
- Inventors:
-
- Pittsburgh, PA
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- OSTI Identifier:
- 868002
- Patent Number(s):
- 5052426
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10J - PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- pressure; letdown; abrasive; slurries; method; releasing; erosive; containment; subjecting; valves; highly; slurry; flow; tank; disposed; below; high-pressure; tanks; connected; valved; line; communicating; gas; phases; valve; choke; transfer; liquid; outlet; release; operation; equalize; level; occurs; vented; creating; differential; controlled; high-velocity; prevented; equalizing; start; thereafter; limiting; outlet valve; outlet line; liquid flow; gas phase; pressure differential; slurry flow; pressure letdown; erosive slurry; disposed below; transfer line; gas transfer; abrasive slurries; /137/210/
Citation Formats
Kasper, Stanley. System for pressure letdown of abrasive slurries. United States: N. p., 1991.
Web.
Kasper, Stanley. System for pressure letdown of abrasive slurries. United States.
Kasper, Stanley. Tue .
"System for pressure letdown of abrasive slurries". United States. https://www.osti.gov/servlets/purl/868002.
@article{osti_868002,
title = {System for pressure letdown of abrasive slurries},
author = {Kasper, Stanley},
abstractNote = {A system and method for releasing erosive slurries from containment at high pressure without subjecting valves to highly erosive slurry flow. The system includes a pressure letdown tank disposed below the high-pressure tank, the two tanks being connected by a valved line communicating the gas phases and a line having a valve and choke for a transfer of liquid into the letdown tank. The letdown tank has a valved gas vent and a valved outlet line for release of liquid. In operation, the gas transfer line is opened to equalize pressure between tanks so that a low level of liquid flow occurs. The letdown tank is then vented, creating a high-pressure differential between the tanks. At this point, flow between tanks is controlled by the choke. High-velocity, erosive flow through a high-pressure outlet valve is prevented by equalizing the start up pressure and thereafter limiting flow with the choke.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}