| 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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| 07/03/2001 | US6253860 Method and arrangement for controlling rock drilling |
| 06/28/2001 | WO2001046549A1 Three dimensional steerable system |
| 06/28/2001 | DE19960824A1 Verfahren und Einrichtung zur Untersuchung und Identifizierung der Art eines Untergrunds Method and apparatus for testing and identification of the type of subsoil |
| 06/21/2001 | WO2001044614A2 Remote lock-out system and method for a horizontal direction drilling system |
| 06/20/2001 | EP1109034A1 Method and apparatus for investigation and identification of the nature of the underlying surface |
| 06/20/2001 | CN1299915A Automatically controlled rotation-controllable drilling system and drilling method |
| 06/19/2001 | US6247536 Downhole multiplexer and related methods |
| 06/13/2001 | EP1106777A1 Method and apparatus for steering a directional drilling tool |
| 06/07/2001 | WO2001040616A1 Controlling the flow of driving fluid to a system of multiple hydraulic motors |
| 06/05/2001 | US6241014 Plunger lift controller and method |
| 05/30/2001 | EP1102917A1 Arrangement for controlling rock drilling |
| 05/30/2001 | CN1066515C Downhole tool |
| 05/29/2001 | US6238141 Apparatus for static underground drilling |
| 05/29/2001 | US6237404 Apparatus and method for determining a drilling mode to optimize formation evaluation measurements |
| 05/23/2001 | EP1101013A1 Reverse circulation drilling system with bit locked underreamer arms |
| 05/23/2001 | CN2431393Y Electromechanical hydraulic integrated automatic vertical drilling tool |
| 05/22/2001 | US6234259 Multiple cam directional controller for steerable rotary drill |
| 05/17/2001 | WO2001034935A1 Control method for use with a steerable drilling system |
| 05/17/2001 | CA2359073A1 Control method for use with a steerable drilling system |
| 05/15/2001 | US6233524 Closed loop drilling system |
| 05/15/2001 | US6233498 Method of and system for increasing drilling efficiency |
| 05/15/2001 | US6230821 Weight control system for a rotary drill assembly |
| 05/10/2001 | WO2001033045A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033044A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033043A1 Method and device of controlling a rock drilling machine |
| 05/10/2001 | WO2001033027A2 Method for optimizing the bit design for a well bore |
| 05/10/2001 | CA2376544A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/08/2001 | US6227044 Methods and apparatus for detecting torsional vibration in a bottomhole assembly |
| 05/08/2001 | CA2106754C Positioning device for a member and drilling-direction control device for a drilling system employing said positioning device |
| 05/03/2001 | US20010000591 Bit torque limiting device |
| 04/26/2001 | WO2001029365A1 Apparatus for manipulating a load |
| 04/25/2001 | CN1292452A Safety drilling prevention automatic equipment |
| 04/17/2001 | US6216800 In-situ drilling system with dust collection and overload control |
| 04/12/2001 | WO2001025823A1 Method for updating an earth model using measurements gathered during borehole construction |
| 04/12/2001 | US20010000202 Bit torque limiting device |
| 04/11/2001 | EP1090269A1 Determining the shape and orientation of a borehole |
| 04/10/2001 | US6213223 Arrangement for supporting rock drilling apparatus |
| 04/03/2001 | US6209665 Reverse circulation drilling system with bit locked underreamer arms |
| 04/03/2001 | US6209662 Method of and apparatus for controlling diamond drill feed |
| 04/03/2001 | US6209661 Method and arrangement for controlling feed in rock drilling |
| 04/03/2001 | US6209636 Wellbore primary barrier and related systems |
| 03/27/2001 | US6206108 Drilling system with integrated bottom hole assembly |
| 03/27/2001 | US6205851 Method for determining drill collar whirl in a bottom hole assembly and method for determining borehole size |
| 03/20/2001 | US6202752 Wellbore milling methods |
| 03/15/2001 | WO2001018356A1 Method of controlling a rock drilling machine |
| 03/13/2001 | US6199629 Computer controlled downhole safety valve system |
| 03/13/2001 | US6199628 Downhole force generator and method |
| 02/28/2001 | EP0897454B1 Closed loop fluid-handling system for use during drilling of wellbores |
| 02/27/2001 | US6192998 Method of and system for optimizing rate of penetration in drilling operations |
| 02/20/2001 | US6191585 Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal |
| 02/15/2001 | WO2001011180A1 Continuous wellbore drilling system with stationary sensor measurements |
| 02/13/2001 | US6186248 Closed loop control system for diamond core drilling |
| 02/08/2001 | WO2001009478A1 Long reach rotary drilling assembly |
| 02/06/2001 | US6182774 Bit torque limiting device |
| 02/01/2001 | WO2000031654A3 Apparatus and method of well management |
| 02/01/2001 | DE19838200C2 Vorrichtung, Verfahren und System zur automatisierten Bodenprobenentnahme The device, method and system for automated soil sampling |
| 01/30/2001 | US6179066 Stabilization system for measurement-while-drilling sensors |
| 01/30/2001 | CA2047282C Attitude control device and drilling-direction control device |
| 01/24/2001 | EP1070191A1 Method and system for optimizing penetration rate |
| 01/23/2001 | US6176324 Drilling device |
| 01/23/2001 | US6176323 Drilling systems with sensors for determining properties of drilling fluid downhole |
| 01/23/2001 | US6176312 Method and apparatus for the remote control and monitoring of production wells |
| 01/17/2001 | EP1068425A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 01/04/2001 | WO2000053887A3 Wellbore primary barrier and related systems |
| 01/03/2001 | EP1064123A1 Method and apparatus for controlling drilling of rock drill |
| 01/02/2001 | US6167965 Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores |
| 12/26/2000 | US6166654 Drilling assembly with reduced stick-slip tendency |
| 12/05/2000 | US6155357 Method of and system for optimizing rate of penetration in drilling operations |
| 11/30/2000 | DE19924200A1 Drill speed-feed control involves regulating feed depending on measured tool rotation so revolution rate is constant; feed is reduced, adjusted or reversed if rotation less than demand value |
| 11/28/2000 | US6152246 Method of and system for monitoring drilling parameters |
| 11/21/2000 | US6148934 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device |
| 11/16/2000 | WO2000068542A1 Multiple cam directional controller for steerable rotary drill |
| 11/07/2000 | US6142250 Rotary drill bit having moveable formation-engaging members |
| 11/02/2000 | EP1048820A2 Method for exploiting geothermal energy and heat exchanger apparatus therefor |
| 11/02/2000 | EP1048819A1 Closed loop fluid-handling system for use during drilling of wellbores |
| 11/02/2000 | DE10016948A1 Measurement of the deviation of a bore hole from its nominal direction using a probe encapsulated above the bore head with sensors for inclination, depth and compass direction and a memory for recording data as a function of time |
| 10/25/2000 | EP1046781A1 Method and system for detecting bit-bounce |
| 10/19/2000 | WO2000061916A1 Three-dimensional steering tool for controlled downhole extended-reach directional drilling |
| 10/19/2000 | CA2306320A1 Method and system of detecting the longitudinal displacement of a drill bit |
| 10/17/2000 | US6131673 Method of assaying downhole occurrences and conditions |
| 10/11/2000 | EP1042588A1 Method and arrangement for controlling feed in rock drilling |
| 10/03/2000 | CA2013711C A method and an arrangement for controlling a rock drilling apparatus |
| 09/26/2000 | CA2165936C Method and apparatus for controlling diamond drill feed |
| 09/22/2000 | CA2266248A1 Method and apparatus for controlling drill string torsional vibration |
| 09/19/2000 | US6119793 Rock drill |
| 09/14/2000 | WO2000053887A2 Wellbore primary barrier and related systems |
| 09/12/2000 | US6116819 Auger piling |
| 09/08/2000 | WO1999057410A9 Method of and device for production of hydrocarbons |
| 09/05/2000 | US6112832 Method and apparatus for controlling a rock drill on the basis of sensed pressure pulses |
| 09/05/2000 | US6112809 Downhole tools with a mobility device |
| 08/31/2000 | WO2000050737A1 Method and apparatus for determining potential interfacial severity for a formation |
| 08/31/2000 | WO2000050735A1 Method and apparatus for determining potential abrasivity in a wellbore |
| 08/31/2000 | WO2000050728A1 Method and apparatus for determining potential for drill bit performance |
| 08/30/2000 | CN2394004Y Automatic controlling and comprehensive protecting apparatus for emulsified liquid pump station |
| 08/29/2000 | US6109370 System for directional control of drilling |
| 08/29/2000 | US6109368 Method and system for predicting performance of a drilling system for a given formation |
| 08/29/2000 | US6109367 Apparatus and method for controlling an underground boring machine |
| 08/15/2000 | US6102138 Pressure-modulation valve assembly |
| 08/15/2000 | US6102137 Apparatus and method for forming ducts and passageways |
| 08/01/2000 | US6095260 System, arrangements and associated methods for tracking and/or guiding an underground boring tool |