EP 0237145 A3 19880127 - ELECTRICALLY POWERED PUMP UNIT
Title (en)
ELECTRICALLY POWERED PUMP UNIT
Publication
Application
Priority
GB 8600746 A 19860114
Abstract (en)
[origin: EP0237145A2] A single or double acting reciprocating pump has a plunger (12) constituted as the rotor of a linear electric motor, the stator being constituted by the pump casing in which the plunger (12) moves. The plunger (12) can be annular, the casing can then have a core around which the plunger is received, and rotor and stator windings (17, 15) can then be provided at either or both of inner and outer faces of the plunger (12). The plunger (12) can extend into a pump end of the pump through a seal (27) from a driving end in which the motor is located, the driving end being oil-filled. The pump is suitably embodied for use in a pipe stack in a fluid extraction apparatus.
IPC 1-7
IPC 8 full level
F04B 17/04 (2006.01)
CPC (source: EP US)
E21B 43/128 (2013.01 - EP US); F04B 17/042 (2013.01 - EP)
Citation (search report)
- [X] US 2686280 A 19540810 - STRONG HERBERT W, et al
- [X] DE 2903817 A1 19800807 - KOFINK SIEGFRIED DR ING
- [X] GB 1442737 A 19760714 - BRITISH PETROLEUM CO
- [X] GB 2112872 A 19830727 - BRITISH PETROLEUM CO PLC
- [X] FR 2106841 A5 19720505 - SAPORTA JOSE
- [X] PATENT ABSTRACTS OF JAPAN, unexamined applications, field M, vol. 7, no. 71, March 24, 1983 THE PATENT OFFICE JAPANESE GOVERNMENT, page 73M202; JP-A-57 212 382 ( NIPPON DENSHIN )
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0237145 A2 19870916; EP 0237145 A3 19880127; GB 8600746 D0 19860219
DOCDB simple family (application)
EP 87300290 A 19870114; GB 8600746 A 19860114