Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Continuous circulation drilling method










Image Number 2 for United States Patent #7322418.

A method for drilling wells in which the tubular can be added or removed from the drill string whilst mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution. A connector is used with an inlet and outlet for the mud etc. and which incorporates rams to seal off and separate the flow of mud as a tubular is added or removed.








 
 
  Recently Added Patents
Oscillation circuit
Method and system for advertisement using internet browser to insert advertisements
Printing device, printing system, program, and printing method for printing based on print data from a user authorized to issue a print instruction for the print data
Cabinet door with tread pattern
Mobile terminal and method for changing page thereof
Apparatus and method for image reconstruction and CT system
Touchscreen with extended conductive pattern
  Randomly Featured Patents
Process for preparing epoxides
Brush applicator with added helix
Shaker head for harvester
Mold for optical element and a method of molding optical element
Apparatus for stabilizing an airway tube
Interlocking corner plug system
MID module and a method of mounting an optical fibre in an MID module
N-substituted azabicyclo[3.2.0]heptane derivatives as neuroleptics, the preparation and use thereof
Fuel injection pump for internal combustion engines
Ammonium 3,5,6-trihydroxyhexanoate derivatives and preparation process thereof