| Patents for E21B 44 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions (5,356) |
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| 08/07/2002 | EP1228290A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/06/2002 | US6427783 Steerable modular drilling assembly |
| 08/01/2002 | US20020103630 Interactive method for real-time displaying, querying and forecasting drilling event and hazard information |
| 07/31/2002 | EP1226336A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 07/31/2002 | EP1226334A1 Method and device of controlling a rock drilling machine |
| 07/31/2002 | CN1361347A Real-time rock parameter detector for drilling hole |
| 07/25/2002 | WO2002057589A2 Internal power source for downhole detection system |
| 07/25/2002 | US20020096322 Down hole tool and method |
| 07/24/2002 | EP1224378A1 Apparatus for manipulating a load |
| 07/23/2002 | US6424919 Method for determining preferred drill bit design parameters and drilling parameters using a trained artificial neural network, and methods for training the artificial neural network |
| 07/19/2002 | CA2338075A1 Continuous measurement-while-drilling surveying |
| 07/18/2002 | WO2002001251A3 Method and system for modeling geological structures using an unstructured four-dimensional mesh |
| 07/16/2002 | US6419031 Method of controlling rock drilling |
| 07/10/2002 | CN1357675A Offset guiding tool |
| 06/27/2002 | WO2002050398A1 Cloded loop fluid-handing system for well drilling |
| 06/27/2002 | US20020082813 Method and system for coordinate transformation to model radial flow near a singularity |
| 06/27/2002 | US20020079136 Mapping tool for tracking and/or guiding an underground boring tool |
| 06/26/2002 | EP1101013A4 Reverse circulation drilling system with bit locked underreamer arms |
| 06/25/2002 | US6411094 System and method for determining orientation to an underground object |
| 06/25/2002 | US6408953 Method and system for predicting performance of a drilling system for a given formation |
| 06/25/2002 | US6408952 Remote lock-out system and method for a horizontal direction drilling system |
| 06/20/2002 | WO2002048505A1 An arrangement and method for drilling with optimal penetration rate |
| 06/20/2002 | US20020074165 Drilling process monitor |
| 06/20/2002 | US20020073528 Bit torque limiting device |
| 06/18/2002 | US6405798 Downhole tool and method |
| 06/13/2002 | WO2002046565A2 Speed governor |
| 06/13/2002 | US20020072883 Method and system for high-resolution modeling of a well bore in a hydrocarbon reservoir |
| 06/13/2002 | US20020070050 Apparatus for measuring weight and torque on drill bit operating in a well |
| 06/11/2002 | US6402524 Data transfer system |
| 06/11/2002 | US6401838 Method for detecting stuck pipe or poor hole cleaning |
| 06/06/2002 | WO2002003263A3 Method and system for coordinate transformation to model radial flow near a singularity |
| 06/06/2002 | WO2002003103A3 Method and system for solving finite element models using multi-phase physics |
| 06/06/2002 | US20020067373 System and method for defining and displaying a reservoir model |
| 06/06/2002 | US20020066574 Downhole multiplexer and related methods |
| 06/05/2002 | EP1064123B1 Method and apparatus for controlling drilling of rock drill |
| 05/30/2002 | WO2002003101A3 Method and system for high-resolution modeling of a well bore in a hydrocarbon reservoir |
| 05/29/2002 | CN2493746Y Pneumatic brake controller for petroleum drill |
| 05/28/2002 | US6394197 Reverse circulation drilling system with bit locked underreamer arms |
| 05/23/2002 | US20020060094 Method for fast and extensive formation evaluation using minimum system volume |
| 05/23/2002 | US20020060093 Operator workstation for use on a drilling rig including integrated control and information |
| 05/16/2002 | WO2002038916A2 An apparatus and method for determining downhole bit failure |
| 05/16/2002 | WO2002038915A2 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator |
| 05/16/2002 | WO2002038914A2 System and method for signalling downhole conditions to surface |
| 05/16/2002 | WO2002038909A2 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator |
| 05/16/2002 | WO2002038908A2 Differential sensor measurements to detect drill bit failure |
| 05/16/2002 | WO2002003265A3 A method for modeling an arbitrary well path in a hydrocarbon reservoir using adaptive meshing |
| 05/15/2002 | CN2491602Y Driller lifting system running state monitor |
| 05/14/2002 | US6389360 Automated bore planning method and apparatus for horizontal directional drilling |
| 05/14/2002 | US6386297 Method and apparatus for determining potential abrasivity in a wellbore |
| 05/10/2002 | WO2002036927A1 Combined grip control of elevator and spider slips |
| 05/10/2002 | WO2002003262A3 System and method for defining and displaying a reservoir model |
| 05/07/2002 | US6382331 Method of and system for optimizing rate of penetration based upon control variable correlation |
| 05/07/2002 | US6382330 Apparatus and method for controlling an underground boring machine |
| 05/02/2002 | WO2002035062A1 Method of rock drilling |
| 05/02/2002 | WO2002035048A1 Solid-state inertial navigation control system for a horizontal drilling machine |
| 05/02/2002 | WO2001033027A3 Method for optimizing the bit design for a well bore |
| 05/02/2002 | US20020050993 Method and system for modeling geological structures using an unstructured four-dimensional mesh |
| 05/02/2002 | US20020050168 Method and device for investigating and identifying the nature of a material |
| 05/01/2002 | CN1347186A Improved coring drill motor and method for obtaining core sample of matter |
| 05/01/2002 | CN1346929A Monitor system for drilling procedure |
| 04/30/2002 | US6378627 Autonomous downhole oilfield tool |
| 04/25/2002 | US20020046845 Hydraulic actuator |
| 04/25/2002 | US20020046843 Hydraulic actuator |
| 04/25/2002 | US20020046834 Hydraulic actuator |
| 04/24/2002 | EP1198655A1 Continuous wellbore drilling system with stationary sensor measurements |
| 04/23/2002 | US6374926 Method of assaying downhole occurrences and conditions |
| 04/18/2002 | US20020046014 Method and system for solving finite element models using multi-phase physics |
| 04/17/2002 | EP0938623B1 Drilling device |
| 04/16/2002 | US6371221 Coring bit motor and method for obtaining a material core sample |
| 04/11/2002 | WO2002029699A1 Method of selecting a cutting system |
| 04/11/2002 | CA2424666A1 Method of selecting a cutting system |
| 04/10/2002 | EP1194652A1 Auger piling |
| 04/09/2002 | US6369339 Apparatus for manipulating a load |
| 04/09/2002 | US6367545 Electronically controlled electric wireline setting tool |
| 04/09/2002 | US6367366 Sensor assembly |
| 04/03/2002 | EP1193367A1 Drilling or coring machine |
| 04/03/2002 | EP1193366A2 Method and apparatus for prediction control in drilling dynamics using neural network |
| 04/03/2002 | CN1082128C Method of assaying work of waderground bit |
| 04/02/2002 | US6363780 Method and system for detecting the longitudinal displacement of a drill bit |
| 03/28/2002 | WO2002025319A2 Methods and apparatus for interactive communications |
| 03/28/2002 | CA2423586A1 Methods and apparatus for interactive communications |
| 03/27/2002 | CN1341803A Method for predicting drilling system performance for given formation and its system |
| 03/26/2002 | CA2047555C Process and drilling equipment for sinking a well in underground rock formations |
| 03/21/2002 | US20020035453 Method for solving finite element models using time slabbing |
| 03/19/2002 | US6357538 Bit torque limiting device |
| 03/19/2002 | US6357537 Directional drilling machine and method of directional drilling |
| 03/14/2002 | US20020032550 Method for modeling an arbitrary well path in a hydrocarbon reservoir using adaptive meshing |
| 03/14/2002 | US20020032494 Feature modeling in a finite element model |
| 03/14/2002 | US20020029908 Electrically sequenced tractor |
| 03/13/2002 | EP0720685B1 Drill automation control system |
| 03/13/2002 | CN1339650A Microcomputerized automatic control system for oil and gas well drilling throttling pressure |
| 03/12/2002 | CA2035823C Method and system for controlling vibrations in borehole equipment |
| 03/07/2002 | WO2001051760A3 System for automatically drilling and backreaming boreholes |
| 03/07/2002 | US20020027002 Downhole flow control devices |
| 03/07/2002 | US20020026870 Hydraulic device |
| 03/05/2002 | US6353799 Method and apparatus for determining potential interfacial severity for a formation |
| 02/21/2002 | US20020020563 Two-speed shift on demand auger drive |
| 02/19/2002 | US6347674 Electrically sequenced tractor |
| 02/19/2002 | CA2108918C Method and apparatus for automatic closed loop drilling system |
| 02/07/2002 | WO2001051761A8 Steerable modular drilling assembly |