Global Patent Index - EP 1042586 A1

EP 1042586 A1 2000-10-11 - DRIVE HEAD FOR A ROTARY-DRIVEN ROD ASSEMBLY, ESPECIALLY FOR DRIVING A SAND PUMP

Title (en)

DRIVE HEAD FOR A ROTARY-DRIVEN ROD ASSEMBLY, ESPECIALLY FOR DRIVING A SAND PUMP

Title (de)

ANTRIEBSKOPF FÜR EIN DREHANTREIBBARES GESTÄNGE, INSBES. ZUM ANTREIBEN EINER BOHRLOCHPUMPE

Title (fr)

TETE D'ENTRAINEMENT POUR TRINGLERIE ENTRAINABLE EN ROTATION, NOTAMMENT POUR ENTRAINER UNE POMPE A TROUS DE MINE

Publication

EP 1042586 A1 (DE)

Application

EP 99953907 A

Priority

  • DE 19849756 A
  • EP 9907990 W

Abstract (en)

[origin: DE19849756A1] The invention relates to a drive head comprising a housing (12) with two passages (24, 26), which face away from one another, for a rod assembly (10) and a rotary-driven sleeve (30). Said sleeve surrounds a section of the rod assembly (10) and can be driven by a rotating drive. The rod assembly (10) is connected to the sleeve (30) by a coupling (40). A hydrodynamic recoil brake (60, 70) is provided for controlled reduction of the torsion power accumulated in the rod assembly (10). Said recoil brake in the operating mode conveys a fluid stream through a throttle point (90). In order to detect whether torsion power is accumulated in the rod assembly (10) which may present a potential danger, a pressure sensing device (102, 124, 126) is connected to the throttle point (90) and produces a signal if the pressure of the fluid exceeds a predetermined threshold value.

IPC 1-7 (main, further and additional classification)

E21B 43/12; F04B 47/02; F04C 15/00; F04C 15/04; F16D 57/06

IPC 8 full level (invention and additional information)

E21B 43/12 (2006.01); F04B 47/02 (2006.01); F04C 14/28 (2006.01); F04C 15/00 (2006.01); F16D 57/06 (2006.01)

CPC (invention and additional information)

F04C 14/28 (2013.01); E21B 43/121 (2013.01); F04B 47/02 (2013.01); F04C 15/0057 (2013.01); F16D 57/06 (2013.01)

Citation (search report)

See references of WO 0025000A1

Designated contracting state (EPC)

AT DE FR GB

EPO simple patent family

DE 19849756 A1 20000511; DE 19849756 C2 20020529; CA 2316792 A1 20000504; CN 1287590 A 20010314; EP 1042586 A1 20001011; WO 0025000 A1 20000504

INPADOC legal status


2004-05-19 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): AT DE FR GB

2003-01-02 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020501

2000-10-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000619

2000-10-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE