EP 2445080 A1 20120425 - System for recovering energy used for raising a load of a draw work
Title (en)
System for recovering energy used for raising a load of a draw work
Title (de)
System zur Rückgewinnung der beim Heben der Last eines Hebewerks benutzten Energie
Title (fr)
Système de récupération d'énergie utilisée pour lever la charge d'un treuil de forage
Publication
Application
Priority
EP 10188707 A 20101025
Abstract (en)
A system (110) for recovering energy used for raising a load of a draw work is described. The system comprises an energy transfer unit (120) for supplying energy to a motor unit (140) for raising the load (150) of the draw work, wherein the energy transfer unit is connectable to the motor unit, and a storage unit (130), wherein the storage unit is connected to the energy transfer unit and wherein the storage unit is adapted for storing energy, which energy is released by the motor unit to the energy transfer unit, when the load is lowered.
IPC 8 full level
B66C 13/28 (2006.01); E21B 41/00 (2006.01); H02J 7/00 (2006.01)
CPC (source: EP)
B66C 13/28 (2013.01); E21B 19/006 (2013.01)
Citation (search report)
- [XAI] US 2005173198 A1 20050811 - TAKEHARA TORU [US], et al
- [X] WO 2007143841 A1 20071221 - RAILPOWER TECHNOLOGIES CORP [CA], et al
- [X] JP 2001163574 A 20010619 - MITSUBISHI HEAVY IND LTD
- [X] ZHANG ET AL: "An energy-saving oil drilling rig for recovering potential energy and decreasing motor power", ENERGY CONVERSION AND MANAGEMENT, ELSEVIER SCIENCE PUBLISHERS, OXFORD, GB, vol. 52, no. 1, 31 July 2010 (2010-07-31), pages 359 - 365, XP027443498, ISSN: 0196-8904, [retrieved on 20100731], DOI: 10.1016/J.ENCONMAN.2010.07.009
Citation (examination)
- EP 2403796 A2 20120111 - GEN ELECTRIC [US]
- WO 2010012455 A1 20100204 - DRILLMEC SPA [IT], et al
- US 7633248 B1 20091215 - WILLIAMS KEVIN R [US] & WO 2010101832 A2 20100910 - GEN ELECTRIC [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 10188707 A 20101025