Title:
DOWNHOLE DRILLING ASSEMBLY WITH MOTOR POWERED HAMMER AND METHOD OF USING SAME
Document Type and Number:
WIPO Patent Application WO/2014/089457
Kind Code:
A3
Abstract:
A drilling assembly assembly includes a hammer motor, a shaft, a driver, and a hammer (218). The shaft is operatively connectable to the hammer motor and rotated thereby. The driver is operatively connectable to the shaft, and includes a cam (such as guide channel 232) rotatable with the shaft and a fixed guide (such as guide pins 230) having a guide surface thereon. The cam is engageable with the guide surface and axially movable thereabout during rotation thereof. The hammer is operatively connectable to the driver and axially movable therewith, axially movable within the housing (215) independently from axial movement of the housing, and engageable with the bit to impart an impact thereto whereby the bit is hammered.
Inventors:
TULLOCH RORY MCCRAE (GB)
EDDISON ALAN MARTYN (GB)
MACFARLANE ALASTAIR HENRY WALTER (GB)
EDDISON ALAN MARTYN (GB)
MACFARLANE ALASTAIR HENRY WALTER (GB)
Application Number:
PCT/US2013/073619
Publication Date:
May 14, 2015
Filing Date:
December 06, 2013
Export Citation:
Assignee:
NAT OILWELL DHT LP (US)
TULLOCH RORY MCCRAE (GB)
EDDISON ALAN MARTYN (GB)
MACFARLANE ALASTAIR HENRY WALTER (GB)
TULLOCH RORY MCCRAE (GB)
EDDISON ALAN MARTYN (GB)
MACFARLANE ALASTAIR HENRY WALTER (GB)
International Classes:
E21B4/10
Foreign References:
| US20110031020A1 | 2011-02-10 | |||
| US2694551A | 1954-11-16 | |||
| US20020185312A1 | 2002-12-12 | |||
| US2228482A | 1941-01-14 | |||
| US6761231B1 | 2004-07-13 | |||
| US5135059A | 1992-08-04 |
Attorney, Agent or Firm:
SALAZAR, Jennie (1934 W. Gray Suite 40, Houston TX, US)
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