Title:
SELF-LOCKING TOP DRIVE GUIDE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2014/055276
Kind Code:
A3
Abstract:
A top drive guide system comprising first and second rail sections axially aligned to form a top drive guide rail. A locking member is coupled to the first rail section and is movable between a locked position and an unlocked position. A locking surface is disposed on the second rail section and is operable to engage the locking member when the locking member is in the locked position. An actuator is coupled to the locking member and is operable to move the locking member from the locked position to the unlocked position.
Inventors:
MARICA ADRIAN (US)
IONESCU MIHAI (US)
IONESCU MIHAI (US)
Application Number:
PCT/US2013/061167
Publication Date:
November 06, 2014
Filing Date:
September 23, 2013
Export Citation:
Assignee:
NAT OILWELL VARCO LLP (US)
International Classes:
B61B13/00; E21B17/046; E21B3/02; E21B7/02; E21B19/15
Foreign References:
| US8181721B1 | 2012-05-22 | |||
| US5381867A | 1995-01-17 | |||
| US20110203820A1 | 2011-08-25 | |||
| US20040129417A1 | 2004-07-08 | |||
| US5921329A | 1999-07-13 |
Attorney, Agent or Firm:
FORINASH, Derek, V. (1000 Main St. Fl. 3, Houston Texas, US)
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