| 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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| 07/25/2000 | US6092610 Actively controlled rotary steerable system and method for drilling wells |
| 07/20/2000 | WO2000042287A1 Automated bore planning method and apparatus for horizontal directional drilling |
| 07/20/2000 | CA2361240A1 Automated bore planning method and apparatus for horizontal directional drilling |
| 07/11/2000 | US6088294 Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction |
| 07/11/2000 | CA2093041C System and method for controlling drill bit usage and well plan |
| 07/04/2000 | US6084826 Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers |
| 06/27/2000 | US6079506 Boring tool control using remote locator |
| 06/27/2000 | US6079504 Underground mining drill rig with safety interlock |
| 06/21/2000 | EP1009912A1 Method of controlling rock drilling |
| 06/21/2000 | EP1009911A1 Arrangement for supporting rock drilling apparatus |
| 06/20/2000 | CA2231321C Real-time pump optimization system |
| 06/18/2000 | CA2686627A1 Electrically sequenced tractor |
| 06/15/2000 | WO2000034617A1 Method for correcting positioning errors in rock drilling, and a rock drilling equipment |
| 06/15/2000 | DE19919555C1 Extraction of geothermal energy from blind bores involves closed circuit feed of heat transmission medium with first chamber in heat exchanger tube for feed of cold fluid |
| 06/08/2000 | WO2000032904A1 Method of and system for monitoring drilling parameters |
| 06/02/2000 | WO2000031654A2 Apparatus and method of well management |
| 06/02/2000 | CA2351728A1 Apparatus and method of well management |
| 05/31/2000 | CN1254789A Petroleum-recovering control method and equipment for discontinuous oil well |
| 05/23/2000 | US6065219 Method and apparatus for determining the shape of an earth borehole and the motion of a tool within the borehole |
| 05/18/2000 | WO2000028188A1 Self-controlled directional drilling systems and methods |
| 05/10/2000 | EP0999346A2 Method and apparatus for detecting torsional vibration in a bottomhole assembly |
| 05/03/2000 | EP0997831A2 Intrinsically safe monitoring device and data acquisition system and method |
| 04/19/2000 | CN1051598C Automatic controller for impacting and rotating work |
| 04/18/2000 | US6050349 Hydraulic system for mud pulse generation |
| 04/18/2000 | US6050348 Drilling method and apparatus |
| 04/18/2000 | CA2034001C Device for guiding a drilling tool within a well and for applying a hydraulic force to said tool |
| 04/12/2000 | CN2373564Y Drilling rotary table parameter instrument |
| 04/12/2000 | CN2373563Y Gas-filled drilling parameter testing and control device |
| 04/11/2000 | US6047783 Systems, arrangements and associated methods for tracking and/or guiding an underground boring tool |
| 04/06/2000 | DE19941197A1 Controller for horizontal drilling machine derives control signals for driving machine from actual and demanded values taking into account heuristic process steps using fuzzy logic |
| 04/05/2000 | CN1249797A Drilling assembly with reduced stick-slip tendency |
| 03/30/2000 | WO2000017487A1 Control mechanism for a horizontal drilling machine |
| 03/28/2000 | CA2085044C Well rig lift system and a hydraulic energy-storing well rig lift system |
| 03/22/2000 | EP0772729B1 Arrangement in a hydraulically operated rock drilling equipment |
| 03/16/2000 | WO2000014382A1 Method of determining drill string stiffness |
| 03/14/2000 | US6035952 Closed loop fluid-handling system for use during drilling of wellbores |
| 03/14/2000 | US6035951 System for tracking and/or guiding an underground boring tool |
| 03/09/2000 | DE19849611C1 Production of ground bores and-or destruction of old pipe conduits underground |
| 03/09/2000 | DE19838200A1 System zur automatisierten Bodenprobenentnahme System for automated soil sampling |
| 03/08/2000 | EP0778916A4 Compliance-based torque and drag monitoring system and method |
| 03/02/2000 | WO2000011304A1 Reverse circulation drilling system with bit locked underreamer arms |
| 03/02/2000 | CA2338579A1 Reverse circulation drilling system with bit locked underreamer arms |
| 03/01/2000 | EP0982471A2 Automated soil sampling system |
| 02/29/2000 | US6029951 Control system for drawworks operations |
| 02/29/2000 | US6029754 Drill with motor drive and feed |
| 02/23/2000 | CN1049718C Method and system for controlling vibrations in borehole equipment |
| 02/22/2000 | US6026912 Method of and system for optimizing rate of penetration in drilling operations |
| 02/22/2000 | US6026911 Downhole tools using artificial intelligence based control |
| 02/17/2000 | WO2000008303A1 Arrangement for controlling rock drilling |
| 02/17/2000 | CA2338760A1 Arrangement for controlling rock drilling |
| 02/09/2000 | EP0842329B1 Improved auger piling |
| 02/02/2000 | CN2361830Y Differential stikcing trend surveying instrument |
| 02/02/2000 | CN1049038C Drilling intelligent monitor |
| 02/01/2000 | US6021377 Drilling system utilizing downhole dysfunctions for determining corrective actions and simulating drilling conditions |
| 02/01/2000 | US6019182 Collar mounted downhole tool |
| 02/01/2000 | US6019180 Method for evaluating the power output of a drilling motor under downhole conditions |
| 01/27/2000 | WO2000004274A1 Downhole multiplexer and related methods |
| 01/25/2000 | US6016878 Method and device for drilling |
| 01/20/2000 | WO1997037102A3 Downhole flow control devices |
| 01/11/2000 | US6012537 Printed circuit board mounting for oil tools |
| 01/06/2000 | WO2000000786A1 Determining the shape and orientation of a borehole |
| 01/05/2000 | CN2357130Y Automatic meter for single well crude oil |
| 12/29/1999 | WO1999057410A3 Method of and device for production of hydrocarbons |
| 12/21/1999 | US6005532 Orthogonal antenna arrangement and method |
| 12/14/1999 | US6002985 Method of controlling development of an oil or gas reservoir |
| 12/09/1999 | WO1999063202A1 Method and arrangement for monitoring well related parameters |
| 12/08/1999 | EP0746667B1 Arrangement for control means in rock drilling equipment |
| 12/08/1999 | CN1238024A Drilling device |
| 12/07/1999 | US5999891 Method and system for detecting the precession of an element of a drill string |
| 12/07/1999 | US5996710 Drilling device |
| 12/01/1999 | EP0960261A1 Tool and method for drilling a lateral well |
| 12/01/1999 | CN1236860A Apparatus and method for determining drilling mode to optimize formation evaluation measurements |
| 11/11/1999 | WO1999057410A2 Method of and device for production of hydrocarbons |
| 11/02/1999 | US5975204 Method and apparatus for the remote control and monitoring of production wells |
| 10/28/1999 | DE19814232C1 Production of ground bores and-or destruction of old pipe conduits underground |
| 10/27/1999 | EP0952302A2 Downhole force generator |
| 10/19/1999 | US5967234 Method of and device for production of hydrocarbons |
| 10/14/1999 | WO1999051849A1 Method and system for optimizing penetration rate |
| 10/13/1999 | EP0948700A2 Whipstock |
| 10/12/1999 | US5964306 Auger earth boring machine with improved efficiency and safety |
| 10/07/1999 | WO1999050528A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 10/06/1999 | EP0947663A1 Apparatus for static earth boring |
| 10/05/1999 | US5960895 Apparatus for providing a thrust force to an elongate body in a borehole |
| 10/05/1999 | US5960883 Power management system for downhole control system in a well and method of using same |
| 09/29/1999 | CN2340896Y High accuracy storing style temperature and pressure meter |
| 09/23/1999 | WO1999047313A1 Method and apparatus for controlling drilling of rock drill |
| 09/20/1999 | CA2266198A1 Thruster responsive to drilling parameters |
| 09/15/1999 | CN1228824A System for directional control of drilling |
| 09/14/1999 | US5952569 Alarm system for wellbore site |
| 09/09/1999 | DE19807898A1 Bore drilling machine for drilling bores in concrete component e.g. drainage pipe |
| 09/07/1999 | US5947214 BIT torque limiting device |
| 09/07/1999 | US5947213 In a well bore |
| 09/01/1999 | EP0939195A2 Apparatus and method for determining a drilling mode to optimize formation evaluation measurements |
| 09/01/1999 | EP0938623A1 Drilling device |
| 08/31/1999 | US5945385 Method and composition for reducing torque in downhole drilling |
| 08/31/1999 | US5944121 Apparatus and method for controlling an underground boring machine |
| 08/24/1999 | CA2094313C Automatic drilling system |
| 08/18/1999 | EP0828923B1 Device for controlling the weight on an earth drill bit |
| 08/05/1999 | WO1999039078A1 Closed loop control system for diamond core drilling |
| 08/05/1999 | CA2322893A1 Closed loop control system for diamond core drilling |