| 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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| 03/26/1998 | WO1998012410A1 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device |
| 03/26/1998 | CA2266494A1 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device |
| 03/24/1998 | US5730234 Method for determining drilling conditions comprising a drilling model |
| 03/18/1998 | EP0828923A2 Device for controlling the weight on an earth drill bit |
| 03/18/1998 | EP0828914A1 Adjustable stabilizer for directional drilling |
| 03/11/1998 | CN1175990A Downhole tool |
| 02/25/1998 | EP0825330A1 Drilling control apparatus of rock drill |
| 02/25/1998 | EP0825329A2 Drilling apparatus with a feed control device |
| 02/24/1998 | US5721538 System and method of communicating between a plurality of completed zones in one or more production wells |
| 02/24/1998 | US5721376 Method and system for predicting the appearance of a dysfunctioning during drilling |
| 02/24/1998 | US5720355 Drill bit instrumentation and method for controlling drilling or core-drilling |
| 02/18/1998 | CN2274689Y Wax monitor for sucking oil well |
| 02/10/1998 | US5715896 Method and composition for reducing torque in downhole drilling |
| 02/03/1998 | US5713422 Apparatus and method for drilling boreholes |
| 01/22/1998 | WO1998002634A1 Downhole tool and method |
| 01/21/1998 | EP0720685A4 Drill automation control system |
| 01/20/1998 | US5709285 For use on a derrick |
| 01/13/1998 | US5707176 Earth discharge control system for small-diameter pipe propelling machine |
| 01/13/1998 | US5706896 Method and apparatus for the remote control and monitoring of production wells |
| 01/07/1998 | EP0816630A1 Method and system for real time estimation of at least one parameter connected to the performance of a downhole tool |
| 01/07/1998 | EP0816629A1 Method and system for real time estimation of at least one parameter connected to the rate of penetration of a drilling tool |
| 01/07/1998 | EP0815350A1 Drilling device |
| 01/07/1998 | EP0815345A1 Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular |
| 01/06/1998 | US5704436 Method of regulating drilling conditions applied to a well bit |
| 12/31/1997 | WO1997049896A1 Method and arrangement for controlling rock drilling |
| 12/31/1997 | WO1997049895A1 Method and arrangement for controlling feeding of rock drilling machine |
| 12/31/1997 | WO1997049889A1 A system for directional control of drilling |
| 12/31/1997 | CA2258236A1 A system for directional control of drilling |
| 12/30/1997 | US5701962 Arrangement for controlling the feed mechanism of a rock drill |
| 12/30/1997 | CA2104010C Oil, gas or geothermal drilling apparatus |
| 12/18/1997 | WO1997047858A1 Method and arrangement for controlling a rock drilling unit driven by a diesel-hydraulic power source |
| 12/17/1997 | EP0577664B1 A drilling equipment and a method for regulating its penetration |
| 12/16/1997 | US5699261 Control arrangement for rock drilling equipment |
| 12/11/1997 | WO1997046793A1 Wellhead pump control system |
| 12/10/1997 | EP0811111A1 Downhole tool |
| 11/26/1997 | EP0708872A4 Method and apparatus for controlling the head of a drilling or core-drilling device |
| 11/18/1997 | CA2072138C Method for conducting an oil drilling operation |
| 11/18/1997 | CA2030520C Vibration analysis drilling control device and process thereof |
| 11/13/1997 | WO1997042395A1 Closed loop fluid-handling system for use during drilling of wellbores |
| 11/12/1997 | EP0806542A2 Steerable rotary drilling system |
| 10/29/1997 | EP0803638A2 Method of testing coiled tubing |
| 10/28/1997 | US5680906 Method for real time location of deep boreholes while drilling |
| 10/25/1997 | CA2203484A1 Method of testing coiled tubing |
| 10/21/1997 | US5679894 Apparatus and method for drilling boreholes |
| 10/09/1997 | WO1997037102A2 Downhole flow control devices |
| 10/08/1997 | EP0799969A2 Process and device for pulling pipes or cables in a pilot hole |
| 10/04/1997 | CA2201823A1 Method and apparatus for sinking the pipes or cables into a pilot borehole |
| 10/02/1997 | WO1997036090A1 Method of regulating drilling conditions applied to a well bit |
| 10/02/1997 | WO1997036084A1 Method of assaying downhole occurrences and conditions |
| 10/01/1997 | EP0628127B1 Downhole tool for controlling the drilling course of a borehole |
| 09/25/1997 | DE19606630C1 Soil sample extraction device |
| 09/24/1997 | EP0577845B1 Device for positioning member and excavating direction control device for excavator employing said device |
| 09/16/1997 | US5667022 Hydraulic impact device with continuously controllable impact rate and impact force |
| 08/26/1997 | US5660239 Drag analysis method |
| 08/21/1997 | WO1997030269A1 Motor drive actuator for downhole flow control devices |
| 08/05/1997 | US5654503 Method and apparatus for improved measurement of drilling conditions |
| 07/24/1997 | WO1997015749A3 Closed loop drilling system |
| 07/03/1997 | WO1997023813A1 Method of and apparatus for controlling diamond drill feed |
| 06/18/1997 | EP0778916A1 Compliance-based torque and drag monitoring system and method |
| 06/12/1997 | DE19542091C1 Bore sample extraction device |
| 06/10/1997 | US5637795 Apparatus and test methodology for measurement of bit/stabilizer balling phenomenon in the laboratory |
| 05/18/1997 | CA2163137A1 Method and apparatus for controlling downhole rotary pump used in production of oil wells |
| 05/14/1997 | EP0772729A1 Arrangement in a hydraulically operated rock drilling equipment |
| 05/01/1997 | WO1997015749A2 Closed loop drilling system |
| 04/22/1997 | US5622231 Cutting head |
| 04/15/1997 | US5620051 Whipstock |
| 03/06/1997 | WO1997008459A1 An improved electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores |
| 03/06/1997 | WO1997008428A1 Method and device for drilling |
| 03/06/1997 | CA2230368A1 Method and device for drilling |
| 03/05/1997 | CN2248778Y Multiple radio alarming monitoring device |
| 02/27/1997 | WO1996038653A3 Device for controlling the weight on an earth drill bit |
| 02/18/1997 | US5603386 Downhole tool for controlling the drilling course of a borehole |
| 02/13/1997 | WO1997005334A1 Improved auger piling |
| 01/16/1997 | WO1997001693A1 Hydraulic thruster for use in a drill string |
| 01/16/1997 | CA2224720A1 Hydraulic thruster for use in a drill string |
| 01/07/1997 | US5592381 Device for processing and interpreting drilling data, placed at the bottom of a well and method implementing this device |
| 01/02/1997 | EP0584110B1 A method and an arrangement for controlling the supply of air into a rock drilling machine |
| 01/02/1997 | EP0551299B1 Method of drilling holes in rock |
| 12/18/1996 | CN2242976Y Adjustable-load type fixed sensor for oil-pumping wheel |
| 12/11/1996 | EP0746667A1 Arrangement for control means in rock drilling equipment |
| 12/10/1996 | US5583764 Intrinsically safe data acquisition system and apparatus |
| 12/05/1996 | WO1996038653A2 Device for controlling the weight on an earth drill bit |
| 11/27/1996 | EP0744526A1 Method for controlling a drilling tool |
| 11/21/1996 | WO1996036788A1 Adjustable stabilizer for directional drilling |
| 11/20/1996 | EP0743423A1 Metod for determining drilling conditions using a model |
| 11/12/1996 | US5573076 Automated drill |
| 11/05/1996 | US5570577 Anchor torque controller for anchor installing machines |
| 10/15/1996 | US5564455 Hydraulic circuit for automatic control of a horizontal boring machine |
| 10/09/1996 | EP0736664A2 Rotary device unit for an earth drilling rig |
| 10/03/1996 | WO1996030627A1 Drilling device |
| 10/03/1996 | WO1996030623A1 Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular |
| 08/29/1996 | WO1996026351A1 Downhole tool |
| 08/28/1996 | EP0580678B1 A method and an equipment for adjusting rock drilling |
| 08/28/1996 | EP0564504B1 A method of drilling a hole in a rock |
| 08/25/1996 | CA2169614A1 Method and device for aligning a drill aggregate |
| 08/15/1996 | WO1996024749A1 Method and apparatus for the remote control and monitoring of production wells |
| 08/14/1996 | EP0725865A1 Drilling apparatus |
| 08/01/1996 | WO1996023127A1 Method and system for logging mechanical parameters of formations crossed through by a borehole |
| 08/01/1996 | CA2186402A1 Method and system for logging mechanical parameters of formations crossed through by a borehole |
| 07/18/1996 | WO1996021871A1 A measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers |