CA1189423A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Choke for drilling or production use
Assignee: Master Flo Valve Inc
•
Filing: 1983-02-25
•
Granted: 1985-06-25
•
Expires: 2003-02-25
Abstract
Abstract "CHOKE FOR DRILLING OR PRODUCTION USE" A choke is provided having a stationary tubular flow nozzle with throttling ports formed through its side wall. A movable tubular throttling ring may be moved over the nozzle to restrict or close the ports. The required liquid-tight seal or shut-off is obtained with annular seal surfaces formed on the nozzle and ring but remote from and upstream of the ports, so that erosion of these seal surfaces, by the high velocity streams passing through the ports, is minimized.
Inventors
- 👤 Harry Richard Cove
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-01 02:31
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; E21B34/025; F; F16; F16K; F16K47/00; F16K47/04; F16K47/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86759; Y10T137/86791
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.