Assignee
ANADRILL INC
US·24 granted patents·2,431 citations·filing 1986–1991
Top patents by PatentIndex Score
24 records- 0199US5092687ADiamond thrust bearing and method for manufacturing sameANADRILL INC·Filed 1991·Granted Mar 3, 1992·524 cites·44 claims
- 0298US5253939AHigh performance bearing pad for thrust bearingANADRILL INC·Filed 1991·Granted Oct 19, 1993·110 cites·26 claims
- 0395US5063776AMethod and system for measurement of fluid flow in a drilling rig return lineANADRILL INC·Filed 1989·Granted Nov 12, 1991·83 cites·33 claims
- 0495US4958125AMethod and apparatus for determining characteristics of the movement of a rotating drill string including rotation speed and lateral shocksANADRILL INC·Filed 1989·Granted Sep 18, 1990·123 cites·12 claims
- 0594US4805449AApparatus and method for measuring differential pressure while drillingANADRILL INC·Filed 1987·Granted Feb 21, 1989·110 cites·23 claims
- 0691US5139094ADirectional drilling methods and apparatusANADRILL INC·Filed 1991·Granted Aug 18, 1992·158 cites·34 claims
- 0791US4887464AMeasurement system and method for quantitatively determining the concentrations of a plurality of gases in drilling mudANADRILL INC·Filed 1988·Granted Dec 19, 1989·133 cites·23 claims
- 0890US4847815ASinusoidal pressure pulse generator for measurement while drilling toolANADRILL INC·Filed 1987·Granted Jul 11, 1989·111 cites·19 claims
- 0989US4833914APore pressure formation evaluation while drillingANADRILL INC·Filed 1988·Granted May 30, 1989·85 cites·15 claims
- 1088US4739841AMethods and apparatus for controlled directional drilling of boreholesANADRILL INC·Filed 1986·Granted Apr 26, 1988·87 cites·30 claims
- 1186US4760735AMethod and apparatus for investigating drag and torque loss in the drilling processANADRILL INC·Filed 1986·Granted Aug 2, 1988·84 cites·15 claims
- 1282US5146433AMud pump noise cancellation system and methodANADRILL INC·Filed 1991·Granted Sep 8, 1992·83 cites·20 claims
- 1382US4949575AFormation volumetric evaluation while drillingANADRILL INC·Filed 1989·Granted Aug 21, 1990·61 cites·13 claims
- 1482US4852399AMethod for determining drilling conditions while drillingANADRILL INC·Filed 1988·Granted Aug 1, 1989·75 cites·14 claims
- 1581US5154078AKick detection during drillingANADRILL INC·Filed 1990·Granted Oct 13, 1992·90 cites·30 claims
- 1680US5181576ADownhole adjustable stabilizerANADRILL INC·Filed 1991·Granted Jan 26, 1993·76 cites·40 claims
- 1779US4941951AMethod for improving a drilling process by characterizing the hydraulics of the drilling systemANADRILL INC·Filed 1989·Granted Jul 17, 1990·71 cites·13 claims
- 1878US4876886AMethod for detecting drilling events from measurement while drilling sensorsANADRILL INC·Filed 1988·Granted Oct 31, 1989·69 cites·8 claims
- 1977US5033557AHydraulic drilling jarANADRILL INC·Filed 1990·Granted Jul 23, 1991·71 cites·40 claims
- 2075US4956921AMethod to improve directional survey accuracyANADRILL INC·Filed 1989·Granted Sep 18, 1990·56 cites·18 claims
- 2173US5275040AMethod of and apparatus for detecting an influx into a well while drillingANADRILL INC·Filed 1991·Granted Jan 4, 1994·62 cites·6 claims
- 2268US4976143ASystem and method for monitoring drill bit depthANADRILL INC·Filed 1989·Granted Dec 11, 1990·55 cites·12 claims
- 2363US5267398AMethod for manufacturing a diamond thrust bearingANADRILL INC·Filed 1991·Granted Dec 7, 1993·37 cites·21 claims
- 2445US4981036AMethod of determining the porosity of an underground formation being drilledANADRILL INC·Filed 1989·Granted Jan 1, 1991·17 cites·11 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →