SPEEDDRILL
Filed: November 15, 1999
Downhole drilling tools, namely Downhole Drill Bits
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 75848422
TERRASCOPE
Filed: January 27, 2005
Computer programs for calculating mechanical properties of rocks drilled in oil and gas exploration; computer programs for…
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 78555241
BLACKBOX
Down hole tool, namely, data recording device for the collection of drilling information in the oil and gas exploration…
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 78630027
TOLTEQ
Filed: June 29, 2011
Electronic test and measurement devices for the compilation and dissemination of data in oil and gas drilling in the nature…
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 85359650
SUREMATE
Filed: June 29, 2011
Electro-mechanical devices for coupling measurement-while-drilling (MWD) tools, namely, centralizers
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 85359666
STEMULATOR
Filed: May 4, 2012
oil and gas well equipment, namely, a non-power operated downhole tool for vacillating the bottom hole assembly to improve…
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 85617186
TOLTEQ
Filed: January 14, 2013
Electronic test and measurement devices for the compilation and dissemination of data in oil and gas drilling in the nature…
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 85822854
TELEDRIFT
Filed: July 23, 2013
MEASUREMENTS WHILE DRILLING TOOLS FOR THE OIL AND GAS INDUSTRY
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 86017386
VELOCITY CONVENTIONAL
Filed: November 27, 2013
downhole drilling tools, namely, core barrels, core bits, coring jars, and core catchers used in the drilling of oil wells…
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 86130795
SPIDLE ROCKY MOUNTAIN KING
Filed: April 14, 2015
drilling motors
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 86596377
RMK
Filed: April 14, 2015
drilling motors
Owned by: NATIONAL OILWELL DHT, L.P.
Serial Number: 86596411
