| 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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| 06/24/1986 | US4596293 Targetable drill with pressure telemetering of drill parameters |
| 06/11/1986 | EP0184304A1 Method and system of drilling deviated wellbores |
| 04/15/1986 | CA1203227A1 Rock drilling apparatus |
| 01/28/1986 | US4566318 Method for optimizing the tripping velocity of a drill string |
| 01/22/1986 | EP0168996A1 Drilling monitor |
| 12/10/1985 | CA1197835A1 Down-hole drilling apparatus |
| 12/04/1985 | EP0163426A1 Assessment of drilling conditions |
| 11/26/1985 | CA1197175A1 Method of determining the length change of a string of well production tubing |
| 10/29/1985 | US4549431 Computer-aided method of detecting problems in drilling wells |
| 10/08/1985 | US4545241 For use with fluid-driven in-hole turbines |
| 08/28/1985 | EP0046800B1 Riser angle positioning system and process |
| 08/20/1985 | US4535851 Fluid flow measurement system |
| 07/24/1985 | EP0149290A2 Intermittently rotating drilling tool |
| 07/10/1985 | EP0148003A1 Measuring torque and hook load during drilling |
| 07/09/1985 | US4527639 Hydraulic piston-effect method and apparatus for forming a bore hole |
| 06/25/1985 | CA1189629A1 Apparatus for monitoring and controlling well drilling parameters |
| 06/19/1985 | EP0145701A1 Percussion drill controls |
| 05/15/1985 | EP0141749A2 Method for remote control with a direct view of a machine on the yard and transmitter-receiver arrangement adapted for carrying it out |
| 05/14/1985 | US4516467 Method and apparatus for controlling a rotary percussive hydraulic drill |
| 04/23/1985 | US4512186 Drill rate and gas monitoring system |
| 04/17/1985 | EP0030971B1 Apparatus for drilling into the sidewall of a drill hole |
| 03/26/1985 | US4507735 Method and apparatus for monitoring and controlling well drilling parameters |
| 03/20/1985 | EP0134467A2 Target-directed drilling rod for rotating boring tools with flushing duct for underground mining |
| 03/12/1985 | US4503918 Rock drilling apparatus |
| 02/19/1985 | US4499956 Locking means for facilitating measurements while coring |
| 02/19/1985 | US4499955 Battery powered means and method for facilitating measurements while coring |
| 01/29/1985 | US4495803 Method of monitoring the growth of cuttings beds in angled well bores |
| 01/08/1985 | US4492275 For monitoring detrimental conditions |
| 01/02/1985 | CA1180426A Control apparatus and method for an oil-well pump assembly |
| 01/01/1985 | US4491186 Automatic drilling process and apparatus |
| 11/20/1984 | CA1178266A1 Technique for measuring weight-on-bit and torque |
| 10/30/1984 | US4479564 System and method for monitoring drill string characteristics during drilling |
| 10/03/1984 | EP0120151A1 A method of determining the length of a string of well production tubing |
| 09/26/1984 | EP0119268A1 Hydrojet drilling means and method |
| 09/18/1984 | US4471663 Drilling torquemeter |
| 08/07/1984 | US4463814 Down-hole drilling apparatus |
| 07/04/1984 | EP0112810A2 A rock drilling apparatus and a method of optimizing percussion rock drilling |
| 06/13/1984 | EP0110182A2 Down-hole drilling apparatus |
| 06/05/1984 | US4452075 Push drill guidance indication apparatus |
| 05/30/1984 | EP0109907A2 Device for maintaining a boring machine in a vertical position |
| 05/29/1984 | US4450906 Apparatus for measuring the weight of the drill string |
| 05/01/1984 | US4445578 System for measuring downhole drilling forces |
| 04/17/1984 | CA1165752A1 Weight on drill bit measuring apparatus |
| 04/10/1984 | CA1165134A1 Sensitive heavy duty dynamic torque measurement coupling unit and meter |
| 04/03/1984 | US4440241 Method and apparatus for drilling a well bore |
| 04/03/1984 | US4440236 Hydraulic control system for a rock drill |
| 03/29/1984 | WO1984001188A1 Hydrojet drilling means and method |
| 03/13/1984 | US4435988 Apparatus for indicating critical torque load |
| 02/22/1984 | EP0101158A2 Method and apparatus for monitoring and controlling well drilling parameters |
| 02/14/1984 | US4432064 Apparatus for monitoring a plurality of operations |
| 02/14/1984 | US4431064 Hydraulic drive apparatus for downhole tools providing rotational and translational motion |
| 02/08/1984 | EP0100230A2 Earth Boring Apparatus |
| 01/24/1984 | US4427079 Intermittently rotatable down hole drilling tool |
| 12/28/1983 | EP0097136A2 Rock drilling apparatus |
| 09/27/1983 | US4407017 Method and apparatus for controlling drilling process |
| 09/27/1983 | US4406332 Rotary earth boring tool |
| 09/13/1983 | US4403664 Earth boring machine and method |
| 09/13/1983 | US4403655 Draw works disabling device for use with a well drilling apparatus |
| 06/14/1983 | US4387774 Time recorder for in-hole motors |
| 05/31/1983 | CA1147438A2 Elevator load control arrangement for a computer- controlled oil drilling rig |
| 05/31/1983 | CA1147435A2 Block position and speed transducer for a computer- controlled oil drilling rig |
| 05/31/1983 | CA1147434A2 Joint sensor for a power tong |
| 05/31/1983 | CA1147432A2 Velocity control arrangement for a computer- controlled oil drilling rig |
| 05/31/1983 | CA1147431A2 Power tongs control arrangement |
| 05/24/1983 | US4384612 Blowout preventer control apparatus |
| 05/10/1983 | US4382381 Determining stresses and length changes in well production tubing |
| 05/03/1983 | CA1145644A1 Fluid pressure actuated by-pass and relief valve |
| 05/03/1983 | CA1145538A1 System and method for monitoring drill string characteristics during drilling |
| 04/26/1983 | CA1145447A1 Riser angle positioning system and process |
| 04/12/1983 | CA1144619A1 Push drill guidance indication apparatus |
| 03/09/1983 | EP0073610A2 Method and apparatus for drilling a well bore |
| 01/25/1983 | US4369848 Control system for a rock drill |
| 12/21/1982 | US4364277 Sensitive heavy duty dynamic torque measurement coupling unit and meter |
| 11/30/1982 | CA1136733A1 Computor-controlled oil drilling rig having drawworks motor and brake control arrangement |
| 11/23/1982 | US4359899 Weight on drill bit measuring apparatus |
| 11/23/1982 | US4359898 Weight-on-bit and torque measuring apparatus |
| 11/23/1982 | CA1136021A1 Pneumatic and hydraulic power control of drill |
| 11/02/1982 | US4356871 Hydraulic control system for a rock drill |
| 10/26/1982 | US4355691 Hydraulic drilling apparatus |
| 10/26/1982 | CA1134257A1 System for measuring downhole drilling forces |
| 10/12/1982 | US4354233 Rotary drill automatic control system |
| 08/24/1982 | CA1130171A1 Hydraulic drilling apparatus |
| 07/06/1982 | US4337653 Blowout preventer control and recorder system |
| 06/23/1982 | EP0054475A1 Apparatus for measuring weight-on-bit and torque |
| 06/22/1982 | CA1126153A1 Fluid flow restrictor valve for a drill hole coring tool |
| 06/15/1982 | US4334408 Pneumatic and hydraulic power control of drill |
| 04/13/1982 | US4324297 Steering drill string |
| 02/23/1982 | US4317174 Riser angle positioning system and process |
| 12/01/1981 | US4303994 System and method for monitoring drill string characteristics during drilling |
| 11/03/1981 | CA1111738A1 Control system for a rock drill |
| 10/21/1981 | EP0037821A1 Monitoring equipment for drilling operations |
| 10/20/1981 | US4296321 Bit pressure gauge for well drilling |
| 09/29/1981 | US4291723 Fluid pressure actuated by-pass and relief valve |
| 09/03/1981 | WO1981002442A1 Riser angle positioning system and process |
| 09/01/1981 | CA1108120A1 System for boring raises having portions of different diameters |
| 08/25/1981 | US4285236 Rotary torque and rpm indicator for oil well drilling rigs |
| 07/28/1981 | US4280569 Fluid flow restrictor valve for a drill hole coring tool |
| 07/28/1981 | US4280524 Apparatus and method for closing a failed open fluid pressure actuated relief valve |
| 07/01/1981 | EP0030975A1 Hydraulic motor for a drill hole coring tool and method |
| 06/30/1981 | US4275795 Fluid pressure actuated by-pass and relief valve |