EP 0314249 A3 19900530 - PUMP OFF/GAS LOCK MOTOR CONTROLLER FOR ELECTRICAL SUBMERSIBLE PUMPS
Title (en)
PUMP OFF/GAS LOCK MOTOR CONTROLLER FOR ELECTRICAL SUBMERSIBLE PUMPS
Publication
Application
Priority
US 11446887 A 19871028
Abstract (en)
[origin: EP0314249A2] A pump off/gas lock motor controller for electrical submersible pumps (ESP) uses a flow rate or flow/no-flow sensor to shut down the ESP when it no longer is pumping fluid so that damage to the ESP is avoided.
IPC 1-7
IPC 8 full level
E21B 43/12 (2006.01); E21B 47/00 (2012.01); F04D 15/02 (2006.01)
CPC (source: EP US)
E21B 43/128 (2013.01 - EP US); E21B 47/008 (2020.05 - EP US); F04D 15/0227 (2013.01 - EP)
Citation (search report)
- [X] US 4171185 A 19791016 - DUKE BILLY J [US], et al
- [Y] DE 3440977 A1 19860522 - LOEWE PUMPENFABRIK GMBH [DE]
- [A] PATENT ABSTRACTS OF JAPAN vol. 8, no. 22 (M-272)(1459) 31-01-1984 & JP-A-58 180797 (HITACHI) 22-10-1983
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0314249 A2 19890503; EP 0314249 A3 19900530; AU 2440088 A 19890504; DK 593888 A 19890429; DK 593888 D0 19881026; NO 884801 D0 19881027; NO 884801 L 19890502
DOCDB simple family (application)
EP 88202383 A 19881025; AU 2440088 A 19881027; DK 593888 A 19881026; NO 884801 A 19881027