Assignee
TELECO OILFIELD SERVICES INC
US·60 granted patents·3,541 citations·filing 1979–1992
Top patents by PatentIndex Score
60 records- 0197US4716973AMethod for evaluation of formation invasion and formation permeabilityTELECO OILFIELD SERVICES INC·Filed 1986·Granted Jan 5, 1988·247 cites·27 claims
- 0294US5128901AAcoustic data transmission through a drillstringTELECO OILFIELD SERVICES INC·Filed 1990·Granted Jul 7, 1992·176 cites·45 claims
- 0393US5138263AElectromagnetic formation evaluation toolTELECO OILFIELD SERVICES INC·Filed 1991·Granted Aug 11, 1992·110 cites·22 claims
- 0493US4647853AMud turbine tachometerTELECO OILFIELD SERVICES INC·Filed 1983·Granted Mar 3, 1987·63 cites·32 claims
- 0592US5134285AFormation density logging mwd apparatusTELECO OILFIELD SERVICES INC·Filed 1991·Granted Jul 28, 1992·94 cites·61 claims
- 0692US4779852AVibration isolator and shock absorber device with conical disc springsTELECO OILFIELD SERVICES INC·Filed 1987·Granted Oct 25, 1988·112 cites·27 claims
- 0792US4575681AInsulating and electrode structure for a drill stringTELECO OILFIELD SERVICES INC·Filed 1985·Granted Mar 11, 1986·124 cites·8 claims
- 0890US4786874AResistivity sensor for generating asymmetrical current field and method of using the sameTELECO OILFIELD SERVICES INC·Filed 1986·Granted Nov 22, 1988·78 cites·18 claims
- 0989US5034929AMeans for varying MWD tool operating modes from the surfaceTELECO OILFIELD SERVICES INC·Filed 1989·Granted Jul 23, 1991·55 cites·12 claims
- 1089US4992787AMethod and apparatus for remote signal entry into measurement while drilling systemTELECO OILFIELD SERVICES INC·Filed 1988·Granted Feb 12, 1991·99 cites·8 claims
- 1189US4958517AApparatus for measuring weight, torque and side force on a drill bitTELECO OILFIELD SERVICES INC·Filed 1989·Granted Sep 25, 1990·89 cites·24 claims
- 1288US5222049AElectromechanical transducer for acoustic telemetry systemTELECO OILFIELD SERVICES INC·Filed 1990·Granted Jun 22, 1993·62 cites·40 claims
- 1388US4821563AApparatus for measuring weight, torque and side force on a drill bitTELECO OILFIELD SERVICES INC·Filed 1988·Granted Apr 18, 1989·86 cites·24 claims
- 1487US5148408AAcoustic data transmission methodTELECO OILFIELD SERVICES INC·Filed 1990·Granted Sep 15, 1992·160 cites·14 claims
- 1587US4674773AInsulating coupling for drill collars and method of manufacture thereofTELECO OILFIELD SERVICES INC·Filed 1985·Granted Jun 23, 1987·61 cites·8 claims
- 1685US5091644AMethod for analyzing formation data from a formation evaluation MWD logging toolTELECO OILFIELD SERVICES INC·Filed 1991·Granted Feb 25, 1992·104 cites·12 claims
- 1785US5001675APhase and amplitude calibration system for electromagnetic propagation based earth formation evaluation instrumentsTELECO OILFIELD SERVICES INC·Filed 1989·Granted Mar 19, 1991·99 cites·35 claims
- 1883US4733233AMethod and apparatus for borehole fluid influx detectionTELECO OILFIELD SERVICES INC·Filed 1986·Granted Mar 22, 1988·84 cites·11 claims
- 1982US5215152ARotating pulse valve for downhole fluid telemetry systemsTELECO OILFIELD SERVICES INC·Filed 1992·Granted Jun 1, 1993·86 cites·24 claims
- 2082US4982801AFlexible coupling for downhole motorTELECO OILFIELD SERVICES INC·Filed 1989·Granted Jan 8, 1991·33 cites·18 claims
- 2181US4761889AMethod for the detection and correction of magnetic interference in the surveying of boreholesTELECO OILFIELD SERVICES INC·Filed 1986·Granted Aug 9, 1988·65 cites·18 claims
- 2281US4733232AMethod and apparatus for borehole fluid influx detectionTELECO OILFIELD SERVICES INC·Filed 1986·Granted Mar 22, 1988·63 cites·14 claims
- 2381US4266606AHydraulic circuit for borehole telemetry apparatusTELECO OILFIELD SERVICES INC·Filed 1979·Granted May 12, 1981·51 cites·7 claims
- 2480US5134783AThread timing for a rotary shouldered connectionTELECO OILFIELD SERVICES INC·Filed 1991·Granted Aug 4, 1992·42 cites·32 claims
- 2580US5012412AMethod and apparatus for measurement of azimuth of a borehole while drillingTELECO OILFIELD SERVICES INC·Filed 1988·Granted Apr 30, 1991·63 cites·29 claims
- 2678US5135059ABorehole drilling motor with flexible shaft couplingTELECO OILFIELD SERVICES INC·Filed 1990·Granted Aug 4, 1992·69 cites·18 claims
- 2778US4878206AMethod and apparatus for filtering noise from data signalsTELECO OILFIELD SERVICES INC·Filed 1988·Granted Oct 31, 1989·63 cites·20 claims
- 2878US4813274AMethod for measurement of azimuth of a borehole while drillingTELECO OILFIELD SERVICES INC·Filed 1987·Granted Mar 21, 1989·61 cites·10 claims
- 2976US5144245AMethod for evaluating a borehole formation based on a formation resistivity log generated by a wave propagation formation evaluation toolTELECO OILFIELD SERVICES INC·Filed 1991·Granted Sep 1, 1992·49 cites·18 claims
- 3076US4877092ANear bit offset stabilizerTELECO OILFIELD SERVICES INC·Filed 1988·Granted Oct 31, 1989·55 cites·43 claims
- 3173US5212495AComposite shell for protecting an antenna of a formation evaluation toolTELECO OILFIELD SERVICES INC·Filed 1990·Granted May 18, 1993·61 cites·10 claims
- 3273US4630809AVibration isolator and shock absorber deviceTELECO OILFIELD SERVICES INC·Filed 1985·Granted Dec 23, 1986·30 cites·8 claims
- 3372US4738812AMethod of forming an electrode structureTELECO OILFIELD SERVICES INC·Filed 1982·Granted Apr 19, 1988·49 cites·6 claims
- 3471US5074681ADownhole motor and bearing assemblyTELECO OILFIELD SERVICES INC·Filed 1991·Granted Dec 24, 1991·56 cites·30 claims
- 3571US5056067AAnalog circuit for controlling acoustic transducer arraysTELECO OILFIELD SERVICES INC·Filed 1990·Granted Oct 8, 1991·38 cites·10 claims
- 3671US4857175ACentrifugal debris catcherTELECO OILFIELD SERVICES INC·Filed 1987·Granted Aug 15, 1989·45 cites·29 claims
- 3770US4265305AMounting and shock absorber assembly for borehole telemetry apparatusTELECO OILFIELD SERVICES INC·Filed 1979·Granted May 5, 1981·39 cites·12 claims
- 3869US4833927ACable tensiometerTELECO OILFIELD SERVICES INC·Filed 1983·Granted May 30, 1989·22 cites·16 claims
- 3969US4570123AElectrode array for measurement of borehole resistivityTELECO OILFIELD SERVICES INC·Filed 1982·Granted Feb 11, 1986·25 cites·8 claims
- 4067US4589187AMethod of manufacturing an insulating coupling for drill collarsTELECO OILFIELD SERVICES INC·Filed 1984·Granted May 20, 1986·32 cites·8 claims
- 4165US5124953AAcoustic data transmission methodTELECO OILFIELD SERVICES INC·Filed 1991·Granted Jun 23, 1992·43 cites·7 claims
- 4264US5050132AAcoustic data transmission methodTELECO OILFIELD SERVICES INC·Filed 1990·Granted Sep 17, 1991·43 cites·5 claims
- 4363US5216242AApparatus for nuclear logging employing sub wall mounted detectors and modular connector assembliesTELECO OILFIELD SERVICES INC·Filed 1991·Granted Jun 1, 1993·29 cites·27 claims
- 4463US4676574AExplosion and flame proof electrical connector protective assemblyTELECO OILFIELD SERVICES INC·Filed 1986·Granted Jun 30, 1987·24 cites·9 claims
- 4562US5163029AMethod for detection of influx gas into a marine riser of an oil or gas rigTELECO OILFIELD SERVICES INC·Filed 1991·Granted Nov 10, 1992·41 cites·19 claims
- 4661US5120963ARadiation detector assembly for formation logging apparatusTELECO OILFIELD SERVICES INC·Filed 1991·Granted Jun 9, 1992·38 cites·23 claims
- 4761US5083124ANuclear logging tool electronics including programmable gain amplifier and peak detection circuitsTELECO OILFIELD SERVICES INC·Filed 1990·Granted Jan 21, 1992·42 cites·27 claims
- 4861US4319240AElectrical connector for borehole telemetry apparatusTELECO OILFIELD SERVICES INC·Filed 1979·Granted Mar 9, 1982·24 cites·15 claims
- 4960US5055837AAnalysis and identification of a drilling fluid column based on decoding of measurement-while-drilling signalsTELECO OILFIELD SERVICES INC·Filed 1990·Granted Oct 8, 1991·37 cites·15 claims
- 5058US5128902AElectromechanical transducer for acoustic telemetry systemTELECO OILFIELD SERVICES INC·Filed 1990·Granted Jul 7, 1992·36 cites·3 claims
Showing the top 50 of 60 patent records by PatentIndex Score.
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