| 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) |
|---|
| 01/06/2010 | CN201377316Y Protective device for preventing well drilling crowned pulley from colliding |
| 01/06/2010 | CN101619655A Drilling method for accurately controlling hole deflection under complicated stratum and guide device |
| 12/31/2009 | US20090321133 Rock drilling apparatus and methdo for controlling rock drilling apparatus |
| 12/30/2009 | EP2137377A1 Method of directing drilling pattern in curved tunnels, rock drilling rig, and software product |
| 12/30/2009 | EP2137376A1 Method of modifying drilling pattern, rock drilling rig, and software product |
| 12/30/2009 | CN100575662C Weight indicator safety alarming system |
| 12/23/2009 | CN201367890Y Remote control fluid speed regulating device |
| 12/17/2009 | WO2009150294A1 Method and equipment for displaying drill holes and method for directing drill rod when holes are drilled into rock |
| 12/17/2009 | US20090308603 Work string controller |
| 12/17/2009 | CA2726930A1 Method and equipment for displaying drill holes and method for directing drill rod when holes are drilled into rock |
| 12/17/2009 | CA2721228A1 Method and apparatus for controlling downhole rotational rate of a drilling tool |
| 12/16/2009 | CN201363136Y Drilling well brake protecting device |
| 12/16/2009 | CN201363135Y Hydraulic automatic control device for protecting gas-oil wells |
| 12/09/2009 | CN201358778Y Under-balanced drilling automatic pressure compensation system |
| 12/09/2009 | CN201358777Y Visible wellhead alignment device dedicated for reversing workover rig |
| 12/09/2009 | CN101600851A Drilling components and systems to dynamically control drilling dysfunctions and methods of drilling a well with same |
| 12/09/2009 | CN101600850A Designing drilling pattern for excavating rock cavern |
| 12/03/2009 | WO2009117478A3 Torque-provider |
| 12/02/2009 | EP2126268A1 Rig engine control |
| 12/02/2009 | CN201354648Y Underground scraper power supply unit capable of remote control |
| 12/01/2009 | CA2581324C Arrangement for controlling percussive rock drilling |
| 12/01/2009 | CA2578828C Torque transmitting coupling |
| 12/01/2009 | CA2559519C Wellsite communication system and method |
| 11/26/2009 | WO2009142798A2 Methods for regulating flow in multi-zone intervals |
| 11/25/2009 | EP2122125A1 Method and device for the control of a rock drilling machine and a rock drilling machine |
| 11/25/2009 | CN201351490Y Throttle control device for down-the-hole drill |
| 11/19/2009 | WO2009138558A1 Method for determining dead zone of valve |
| 11/18/2009 | EP2118441A2 Drilling components and systems to dynamically control drilling dysfunctions and methods of drilling a well with same |
| 11/18/2009 | CN201347748Y Text message remote control oil well intermittent pumping controller |
| 11/18/2009 | CN101581209A Auto-control symmetrical-steam-bleeding pipeline and use method thereof |
| 11/12/2009 | WO2009117486A3 Distributed sensors-controller for active vibration damping from surface |
| 11/11/2009 | CN101575940A Drilling operation method by utilizing dual drill drilling system |
| 11/10/2009 | US7617051 Method and system for pre-drill pore pressure prediction |
| 11/05/2009 | WO2009135157A2 Adaptive drilling control system |
| 11/05/2009 | WO2009102578A3 Method and system of monitoring rotational time of rotatable equipment |
| 11/05/2009 | US20090272579 Steerable bit |
| 11/05/2009 | US20090272578 Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations |
| 11/03/2009 | US7610970 Apparatus for eliminating net drill bit torque and controlling drill bit walk |
| 11/03/2009 | CA2558627C Methods and apparatus for using formation property data |
| 10/29/2009 | WO2009130441A1 Torsional resonance prevention |
| 10/29/2009 | US20090266608 Torsional resonance prevention |
| 10/28/2009 | CN101568697A Designing drilling pattern for excavating rock cavern |
| 10/28/2009 | CN101566059A Wide-adaptive novel automatic driller |
| 10/27/2009 | US7607494 Earth penetrating apparatus and method employing radar imaging and rate sensing |
| 10/22/2009 | WO2009128999A1 Distributed databases for a well control drilling system |
| 10/22/2009 | US20090260876 Multiple Distributed Force Measurements |
| 10/21/2009 | CN201330597Y Oilfield patrol management system |
| 10/21/2009 | CN201330596Y Oil pumping unit running monitor |
| 10/20/2009 | US7604072 Method and apparatus for collecting drill bit performance data |
| 10/20/2009 | US7604070 Arrangement for controlling percussive rock drilling |
| 10/20/2009 | CA2436134C Method of controlling a well experiencing gas kicks |
| 10/15/2009 | WO2009082453A3 Pulse rate of penetration enhancement device and method |
| 10/14/2009 | CN101555797A Extraction device for undersea gas hydrate and extraction method thereof |
| 10/08/2009 | WO2009123535A1 Method and apparatus for adjusting and controlling a parameter |
| 10/08/2009 | US20090250263 Adaptive user interface for rock drilling rig |
| 10/07/2009 | CN201321853Y Testing device for stabilized platform |
| 10/04/2009 | CA2681156A1 Tool and method for evaluating fluid dynamic properties of a cement annulus surrounding a casing |
| 10/01/2009 | WO2009088915A3 Tripping indicator for mwd systems |
| 10/01/2009 | US20090242273 Drill rig and method for controlling a fan therein |
| 09/30/2009 | CN101545370A Online-adjustable emergent-disengaging system for deep-sea blowout preventer |
| 09/24/2009 | WO2009117486A2 Distributed sensors-controller for active vibration damping from surface |
| 09/24/2009 | WO2009117478A2 Torque-provider |
| 09/24/2009 | US20090236148 Flow Guide Actuation |
| 09/24/2009 | US20090236145 Analysis refracted acoustic waves measured in a borehole |
| 09/23/2009 | CN201314225Y Automatic control system of petroleum electrohydraulic workover rig |
| 09/22/2009 | US7591314 Measurement-while-fishing tool devices and methods |
| 09/22/2009 | CA2447088C Drilling control arrangement |
| 09/17/2009 | WO2009085732A3 Mechanical actuator with electronic adjustment |
| 09/17/2009 | US20090229882 Distributed sensors-controller for active vibration damping from surface |
| 09/16/2009 | CN100540845C Drilling string torsional energy control assembly and method |
| 09/16/2009 | CN100540843C In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor |
| 09/15/2009 | US7590516 Method for quantifying uncertainties related to continuous and discrete parameters descriptive of a medium by construction of experiment designs and statistical analysis |
| 09/15/2009 | US7588099 Horizontal drilling system with oscillation control |
| 09/10/2009 | US20090223716 Downhole hydraulic control system |
| 09/10/2009 | US20090223291 Gravity measurment methods for monitoring reservoirs |
| 09/09/2009 | CN101525996A Leapfrog neutron tube target voltage control method |
| 09/09/2009 | CN101525994A Measuring and monitoring system for oil wellhead |
| 09/09/2009 | CN101525993A Method for monitoring and controlling sulfureted hydrogen in sulfur-containing stratum underbalanced drilling |
| 09/09/2009 | CN100538005C Equipment and method for defining drilling mode and using optimized formation to make assess measurement |
| 09/08/2009 | US7584788 Control method for downhole steering tool |
| 09/08/2009 | CA2525201C Plunger lift apparatus that includes one or more sensors |
| 09/08/2009 | CA2448134C Method and apparatus for determining drilling paths to directional targets |
| 09/03/2009 | WO2009064656A3 Borehole survey method and apparatus |
| 09/02/2009 | EP2094943A1 Designing drilling pattern for excavating rock cavern |
| 09/02/2009 | EP2094942A1 Designing drilling pattern for excavating rock cavern |
| 09/02/2009 | EP1902196B1 Method and apparatus for collecting drill bit performance data |
| 09/02/2009 | CN201301701Y Flexible torque control system of electrical drilling machine rotating disc |
| 09/02/2009 | CN100535380C Dynamic annular pressure control apparatus and method |
| 08/27/2009 | WO2009105470A2 Devices and methods for horizontal directional drilling with a boring tool library |
| 08/20/2009 | WO2009102804A2 Systems and methods for positioning of pads and orienting slot templates |
| 08/20/2009 | WO2009102578A2 Method and system of monitoring rotational time of rotatable equipment |
| 08/20/2009 | WO2009075962A3 Methods and systems to estimate wellbore events |
| 08/20/2009 | WO2009062041A3 Automated electrical stability meter |
| 08/20/2009 | US20090205868 Devices and Methods for Horizontal Directional Drilling with a Boring Tool Library |
| 08/20/2009 | CA2714731A1 Systems and methods for improved positioning of pads |
| 08/20/2009 | CA2712580A1 Method and system of monitoring rotational time of rotatable equipment |
| 08/19/2009 | EP2090742A1 Methods and systems to estimate wellbore events |
| 08/19/2009 | CN201292833Y Touching PLC controller of roughneck |
| 08/19/2009 | CN201292832Y Operation controller for iron roughneck |
| 08/19/2009 | CN101512102A Method for drilling rock |