| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 09/26/1978 | US4116451 Shaft seal assembly and seal ring therefor |
| 09/26/1978 | US4116285 Process and apparatus for producing deep boreholes |
| 09/26/1978 | CA1039110A1 Inlet and outlet ports and sealing means for a fluid driven motor |
| 09/26/1978 | CA1039074A1 Apparatus for connecting motors in tandem |
| 09/19/1978 | US4114704 Down hole well drilling tool with reversible thrust bearings |
| 09/19/1978 | US4114703 Well drilling tool having sealed lubrication system |
| 09/19/1978 | US4114702 Well drilling tool with lubricant level indicator |
| 09/19/1978 | US4114700 Pneumatic apparatus of the percussive type |
| 09/05/1978 | CA1037797A1 Sampling airhammer apparatus |
| 08/22/1978 | US4108023 Gear system |
| 08/15/1978 | US4106571 Pneumatic impact drilling tool |
| 08/08/1978 | US4105377 Hydraulic roller motor |
| 08/01/1978 | US4103749 Downhole cleaner assembly for petroleum wells |
| 07/25/1978 | US4102415 Drilling device |
| 07/18/1978 | US4100980 Self-propelled pneumatic burrowing device |
| 07/18/1978 | US4100976 Pneumatic impact drilling tool |
| 07/18/1978 | US4100972 Displacement hammer apparatus for sinking and lining boreholes |
| 07/11/1978 | US4099584 Flame jet tool for drilling to great depths |
| 07/04/1978 | US4098561 Sealed bearings |
| 07/04/1978 | US4098359 Hydraulically operated downhole motor |
| 07/04/1978 | US4098352 Percussion bit with bypass channel therein |
| 06/20/1978 | US4095655 Earth penetration |
| 06/13/1978 | US4094366 Pneumatic percussion machines |
| 05/30/1978 | CA1032154A1 Exploration boring method and use thereof |
| 05/23/1978 | US4090574 Gear system for an oil well drive |
| 05/02/1978 | US4086788 Drive having a plurality of thrust bearings |
| 04/25/1978 | US4085808 Self-driving and self-locking device for traversing channels and elongated structures |
| 04/18/1978 | US4084647 Pneumatic percussion hammer |
| 04/18/1978 | US4084646 Fluid actuated impact tool |
| 04/18/1978 | US4084636 Hydraulic junk retriever |
| 04/11/1978 | US4083612 Non-rotating stabilizer for earth boring and bearing therefor |
| 03/21/1978 | US4080115 Progressive cavity drive train |
| 03/21/1978 | US4080094 Downhole motor rotor supports |
| 03/21/1978 | US4079793 Exhaust means for percussion tools |
| 03/14/1978 | US4078619 Reversible air-operated apparatus of the percussive type for driving holes in ground by compacting same |
| 01/31/1978 | US4071100 Method of making holes of selected external configuration in preferably rock or ground formation, and a drilling machine for carrying out the method |
| 01/31/1978 | US4070948 Pneumatic impact devices |
| 01/24/1978 | US4069876 Hydraulic percussive machine |
| 01/10/1978 | US4067405 Hydraulic shock absorber |
| 01/03/1978 | US4066137 Flame jet tool for drilling cross-holes |
| 12/06/1977 | US4061197 Method and apparatus for drilling in permafrost and the like |
| 11/29/1977 | US4060141 Self-propelled deep well turbine drill |
| 11/22/1977 | US4059165 Versatile fluid motor and pump |
| 11/15/1977 | US4058176 Tool and method for drilling a hole with an increased cross-sectional area |
| 11/15/1977 | US4058163 Selectively actuated vibrating apparatus connected with well bore member |
| 10/18/1977 | US4054180 Impact drilling tool having a shuttle valve |
| 10/04/1977 | US4051911 Apparatus and process for drilling underground arcuate paths utilizing directional drill and following liner |
| 10/04/1977 | US4051910 Two way earth boring fluid motor |
| 10/04/1977 | US4051909 Turbine drill for drilling at great depths |
| 09/27/1977 | US4050525 Down-the-hole hammer |
| 09/20/1977 | US4049066 Apparatus for reducing annular back pressure near the drill bit |
| 09/13/1977 | US4047581 Multistage, downhole, turbo-powered intensifier for drilling petroleum wells |
| 09/06/1977 | US4046204 Controlled directional drilling tool |
| 08/30/1977 | US4044844 Impact drilling tool |
| 08/23/1977 | US4043409 Drill steel for deep drill hammers |
| 08/09/1977 | US4040495 Drilling apparatus |
| 08/09/1977 | US4040494 Drill director |
| 06/28/1977 | US4031971 Jet nozzle drilling assembly |
| 06/28/1977 | US4031970 Borehole drilling apparatus |
| 06/28/1977 | US4031969 Method and apparatus for earth boring |
| 06/21/1977 | US4030554 Bore hole airhammer and anvil bit |
| 06/14/1977 | US4029368 Radial bearings |
| 04/26/1977 | US4019592 By-pass tool |
| 04/26/1977 | US4019591 Well drilling tool |
| 04/12/1977 | US4016944 Pneumatic hammer-auger earth boring apparatus |
| 04/12/1977 | US4016943 Method for connecting electrical conductors for electric earth boring means |
| 04/05/1977 | US4015670 Fluid operated hammer |
| 04/05/1977 | US4015662 Well tool which changes reciprocating movement to rotary motion |
| 03/15/1977 | US4011917 Process and universal downhole motor for driving a tool |
| 03/01/1977 | US4009909 Upward tunneling |
| 02/15/1977 | US4007797 Device for drilling a hole in the side wall of a bore hole |
| 01/25/1977 | US4004642 Tround terra-drill processes and apparatus |
| 01/18/1977 | US4003442 Detachable drill bit for impact drilling |
| 01/11/1977 | US4002213 Down-the-hole motor for rotary drill rod and process for drilling using the same |
| 12/28/1976 | US3999901 Progressive cavity transducer |
| 12/28/1976 | US3999618 Hammer stabilizer |
| 12/14/1976 | US3997009 Well drilling apparatus |
| 12/14/1976 | US3997008 Drill director |
| 12/07/1976 | US3995702 Reversible pneumatic percussive device for making holes in ground by compaction |
| 11/16/1976 | US3991834 Sampling airhammer apparatus |
| 11/09/1976 | US3990524 Down-the-hole motor for rotary drill rod and process for drilling using the same |
| 11/02/1976 | US3989409 Turbodrill |
| 11/02/1976 | US3989114 Circulation sub for in-hole hydraulic motors |
| 10/19/1976 | US3986565 Exhaust means for percussion tool motors |
| 10/19/1976 | US3986370 Apparatus for connecting motors in tandem |
| 09/28/1976 | US3982859 Floating flow restrictors for fluid motors |
| 09/28/1976 | US3982858 Segmented stator for progressive cavity transducer |
| 09/28/1976 | US3982797 Spring-loaded bearings for in-hole motors |
| 09/21/1976 | US3981540 Rock breaking apparatus |
| 09/21/1976 | US3981186 Device for blocking at a given torque a rotating machine driven by a hydraulic turbine |
| 09/07/1976 | US3978931 Air-operated drilling machine or rotary-percussive action |
| 09/07/1976 | US3978930 Earth drilling mechanisms |
| 08/17/1976 | US3975121 Wafer elements for progressing cavity stators |
| 08/17/1976 | US3975120 Wafer elements for progressing cavity stators |
| 07/27/1976 | US3971450 Well drilling tool |
| 07/27/1976 | US3971217 Reciprocatable devices |
| 07/20/1976 | US3970335 Dual concentric pipes |
| 07/20/1976 | US3970153 Pneumatic percussion machines |
| 07/20/1976 | US3970152 Mud actuated drilling tool |
| 07/06/1976 | US3967680 Method and apparatus for actuating a downhole device carried by a pipe string |