US Patent No: 5,671,818

Number of patents in Portfolio can not be more than 2000

Rotary drill bits

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid channels leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In at least one of the fluid channels, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The portion of the gauge region outwardly of the opening comprises a bearing surface which, in use bears against the wall of the bore hole and extends across the width of the channel.

Loading the Abstract Image... loading....

First Claim

See full text

all claims..

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
REEDHYCALOG UK LTD.STONEHOUSE92

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clegg, John M Redland, GB2 10 589
Murdock, Andrew Stonehouse, GB2 16 332
Newton, Alex Clifton, GB3 9 286
Taylor, Malcolm R Gloucester, GB2 16 549

Cited Art Landscape

Patent Info (Count) # Cites Year
 
AKAMAI TECHNOLOGIES, INC. (1)
2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM 24 2009
 
BAKER HUGHES INCORPORATED (1)
5,199,511 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations 39 1991
 
CAMCO DRILLING GROUP LIMITED (1)
5,244,039 Rotary drill bits 56 1991
 
EXXON PRODUCTION RESEARCH COMPANY (1)
5,145,017 Kerf-cutting apparatus for increased drilling rates 43 1991
 
KENNAMETAL INC. (1)
5,452,628 Cold headed center vacuum drill bit 23 1994
 
PETROLEUM PRODUCTS LIMITED (1)
4,733,735 Rotary drill bits 30 1986
 
REEDHYCALOG UK LTD. (1)
5,417,296 Rotary drill bits 15 1994
 
Other [Check patent profile for assignment information] (1)
5,029,657 Rock drill bit 10 1989

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
BAKER HUGHES INCORPORATED (6)
5,794,725 Drill bits with enhanced hydraulic flow characteristics 13 1996
5,836,404 Drill bits with enhanced hydraulic flow characteristics 5 1997
6,079,507 Drill bits with enhanced hydraulic flow characteristics 5 1998
7,694,755 System, method, and apparatus for variable junk slot depth in drill bit body to alleviate balling 0 2007
7,836,979 Drill bits and tools for subterranean drilling 1 2008
8,079,430 Drill bits and tools for subterranean drilling, methods of manufacturing such drill bits and tools and methods of off-center drilling 0 2009
 
CAMCO INTERNATIONAL (UK) LIMITED (4)
6,092,613 Rotary drill bits 25 1998
5,992,547 Rotary drill bits 97 1998
5,967,246 Rotary drill bits 32 1998
6,427,792 Active gauge cutting structure for earth boring drill bits 24 2000
 
SMITH INTERNATIONAL, INC. (2)
6,564,886 Drill bit with rows of cutters mounted to present a serrated cutting edge 20 2000
7,325,631 Mill and pump-off sub 1 2005
 
HALLIBURTON ENERGY SERVICES, INC. (1)
8,274,399 Method and system for predicting performance of a drilling system having multiple cutting structures 0 2007
 
REEDHYCALOG UK LTD. (1)
5,904,213 Rotary drill bits 18 1997

Full Text

 
loading....