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DOWELL SCHLUMBERGER INC

Overview
  • Total Patents
    163
About

DOWELL SCHLUMBERGER INC has a total of 163 patent applications. Its first patent ever was published in 1980. It filed its patents most often in United States, Norway and Canada. Its main competitors in its focus markets basic materials chemistry, machines and civil engineering are B J SERVICES COMPANY, WESTERN CO OF NORTH AMERICA and DOWELL SCHLUMBERGER CANADA.

Patent filings per year

Chart showing DOWELL SCHLUMBERGER INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Cameron Donald C 13
#2 Hodge Richard M 12
#3 Sorem Robert M 10
#4 Eslinger David M 9
#5 Mcintire William R 8
#6 Mcmillan James S 7
#7 Scranton Joseph D 7
#8 Frenier Wayne W 7
#9 Nelson Erik B 6
#10 Kucera Clare H 6

Latest patents

Publication Filing date Title
US5658859A Pseudoplastic mixed metal layered hydroxide fluid with fluid loss additive and method of use in penetrating the earth
US5658861A Delayed borate crosslinked fracturing fluid having increased temperature range
US5445223A Delayed borate crosslinked fracturing fluid having increased temperature range
CA2103095A1 Sealing element for inflatable packer
US5350018A Well treating system with pressure readout at surface and method
US5404947A Pre-formed stress rings for inflatable packers
US5353871A Inflatable packer with protective rings
US5361836A Straddle inflatable packer system
US5398755A Stress rings for inflatable packers
US5439053A Reinforcing slat for inflatable packer
US5330005A Control of particulate flowback in subterranean wells
US5363542A Method of assembly for inflatable packer
US5361479A Method of assembly for inflatable packer
US5390738A Inflatable packer inner bladder retention and seal
US5287930A Valve apparatus for use in sand control
US5314014A Packer and valve assembly for temporary abandonment of wells
US5171041A Reinforced flanges on plastic pipe
US5197324A Methods and apparatus using a gel to isolate mainline valves in a pipeline during a hydrotest
WO9116191A1 Method and device for forming flanges an plastic pipe
US5230363A Suction valve for high pressure slurry pump