| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 03/17/1981 | US4256191 Intermittent high-drag oil well drilling methods and apparatus |
| 03/17/1981 | US4256189 Well drilling tool |
| 03/03/1981 | US4253532 In-hole motor drill with locking bit clutch |
| 03/03/1981 | US4253531 Self-balancing vibratory drill apparatus |
| 02/24/1981 | US4252201 Drilling method and apparatus |
| 02/19/1981 | WO1981000428A1 Turbo-drill |
| 02/17/1981 | US4250972 Pneumatic ram boring device |
| 02/03/1981 | US4248133 Impact mechanism |
| 02/03/1981 | CA1095020A1 Down hole well drilling tool |
| 01/28/1981 | EP0022865A1 Hydraulically-driven downhole drill |
| 01/27/1981 | US4246976 Down hole drilling motor with pressure balanced bearing seals |
| 01/22/1981 | WO1981000124A1 Reversible percussive action device |
| 01/13/1981 | CA1093459A1 Well perforating tool |
| 01/08/1981 | WO1981000018A1 Hydraulic motor for a drill hole coring tool and method |
| 01/08/1981 | WO1981000017A1 Apparatus and method for drilling into the sidewall of a drill hole |
| 01/06/1981 | US4243112 Vibrator-assisted well and mineral exploratory drilling, and drilling apparatus |
| 01/06/1981 | US4243098 Downhole steam apparatus |
| 12/30/1980 | US4241800 Cutting tool for a pneumatic hammer |
| 12/23/1980 | US4240683 Adjustable bearing assembly |
| 11/11/1980 | US4232751 In-hole motor drill with bit clutch |
| 10/28/1980 | US4230191 Machine for making underground excavations |
| 10/16/1980 | WO1980002176A1 Multiple-thread screw-type drive for use in the borehole |
| 10/14/1980 | US4227584 Downhole flexible drive system |
| 10/14/1980 | CA1087640A1 Surface drilling apparatus |
| 09/30/1980 | US4225000 Down hole drilling motor with pressure balanced bearing seals |
| 09/23/1980 | US4223747 Drilling using reverse circulation |
| 09/18/1980 | WO1980001936A1 Planetary gear mechanism |
| 09/16/1980 | US4222445 Reduction unit of drilling motor |
| 09/09/1980 | US4221552 Hydraulic motor with variable speed |
| 09/09/1980 | US4221157 Pneumatically operated percussion boring apparatus |
| 09/09/1980 | CA1085376A1 Fluid operated undercutter |
| 09/03/1980 | EP0015086A1 Kelly bushing in a downhole drilling system |
| 09/02/1980 | US4220380 Bearing assembly |
| 08/05/1980 | CA1083134A1 Means and method of forming and enlarging holes in soil |
| 07/29/1980 | US4214638 Method of controlling the reversing of a device for driving holes in earth and device for performing same |
| 07/29/1980 | CA1082681A1 Direct drive bit for deep drilling tools |
| 07/08/1980 | US4211292 Borehole angle control by gage corner removal effects |
| 07/08/1980 | US4211291 Drill fluid powered hydraulic system |
| 06/26/1980 | WO1980001300A1 Hydraulically-driven downhole drill |
| 06/24/1980 | US4209070 Air-operated self-propelling rotary-percussive downhole drill |
| 06/10/1980 | US4207037 Stator for a downhole fluid operated motor and method of assembling the same |
| 05/29/1980 | WO1980001091A1 Device for making drillings into the rock,soil,etc |
| 05/28/1980 | EP0011287A1 Down-the-hole drill for rock, earth or the like |
| 05/28/1980 | EP0011219A1 Connection of fluid flow path-defining components in down-the-hole hammer drills |
| 05/28/1980 | EP0011218A1 Sealing and retaining of telescopically related elements |
| 05/27/1980 | CA1078369A1 Device whereby a duct in a deep bore hole is supported and moved up or down by reaction against the bore hole surface |
| 05/13/1980 | US4202416 Method and apparatus for sinking a cased borehole for producing cased pile foundations |
| 04/29/1980 | CA1076551A1 Drive having a plurality of thrust bearings |
| 04/22/1980 | USRE30257 Well drilling tool |
| 04/22/1980 | US4199201 Bearing assembly with adjustable lock nut |
| 04/15/1980 | US4198104 Adjustable stacked bearing assembly |
| 04/08/1980 | CA1075224A1 Apparatus for drilling deep bore holes in bedrock |
| 04/01/1980 | USRE30246 Methods and apparatus for driving a means in a drill string while drilling |
| 03/25/1980 | US4194581 Deep drill hammer |
| 03/25/1980 | US4194435 Percussion mechanism |
| 03/18/1980 | US4193461 Means and method for forming and enlarging holes in soil |
| 03/04/1980 | CA1072836A1 Fluid actuated percussion mechanism |
| 02/26/1980 | CA1072537A1 Impact drilling tool having a shuttle valve |
| 02/12/1980 | US4187918 Down-hole earth drilling motor capable of free circulation |
| 02/05/1980 | US4187061 Rotary helical fluid motor with deformable sleeve for deep drilling tool |
| 02/05/1980 | US4186810 Fluid operated undercutter |
| 01/29/1980 | US4185705 Well perforating tool |
| 01/29/1980 | US4185703 Apparatus for producing deep boreholes |
| 01/09/1980 | EP0006656A1 Device for winning minerals via a borehole |
| 12/18/1979 | CA1068254A1 Optional up-blow, down-blow jar tool |
| 11/14/1979 | EP0005384A1 Down-hole air hammer comprising a drill bit |
| 10/31/1979 | EP0004946A1 Bore hole hammer, especially down-the-hole hammer |
| 10/16/1979 | CA1064468A1 Percussion bit with bypass channel therein |
| 10/09/1979 | US4170441 Speed changer for in-hole motors |
| 10/02/1979 | CA1063447A1 Reversible air-operated apparatus of the percussive type for driving holes in ground by compacting same |
| 08/28/1979 | CA1061323A1 Rock-drilling bit for percussion hammers |
| 08/21/1979 | CA1060680A1 Gear system |
| 08/07/1979 | US4163478 Self aligning impact rock drilling tool |
| 07/17/1979 | CA1058607A1 Detachable drill bit for impact drilling |
| 06/26/1979 | CA1057120A1 Versatile fluid motor and pump |
| 06/12/1979 | CA1056364A1 Hydraulic shock absorber |
| 06/05/1979 | US4157022 Pressure compensating coupling for in hole motors |
| 05/15/1979 | US4154310 Method and equipment for drilling wells |
| 05/08/1979 | US4153119 Directional drilling apparatus |
| 05/08/1979 | CA1054137A1 Well drilling tool |
| 05/08/1979 | CA1053999A1 Fluid actuated impact tool |
| 05/01/1979 | US4151889 Rock-drilling bit for percussion hammers |
| 03/27/1979 | US4146097 Bore hole air hammer |
| 03/20/1979 | US4144941 Directional impact tool for tunneling |
| 03/13/1979 | US4143722 Downhole flexible drive system |
| 02/27/1979 | US4141414 Device for supporting, raising and lowering duct in deep bore hole |
| 02/06/1979 | US4137975 Drilling method |
| 02/06/1979 | CA1048012A1 Pneumatic hammer-auger earth boring apparatus |
| 01/23/1979 | US4135772 Bearing block for boring turbine |
| 01/23/1979 | CA1047024A1 Method and apparatus for earth boring |
| 01/09/1979 | US4133397 Drilling with multiple in-hole motors |
| 01/09/1979 | US4133396 Drilling and casing landing apparatus and method |
| 01/09/1979 | US4133395 Earth boring assembly with drag pipe |
| 01/09/1979 | US4133393 Down-the-hole percussion drills |
| 01/09/1979 | CA1046049A1 Down-the-hole hammer |
| 01/02/1979 | US4132277 Pneumatic reversible impact device for driving holes in soil |
| 10/24/1978 | US4121672 Reversing pneumatic percussive device |
| 10/17/1978 | US4120368 Supplying motive fluid to below ground tool drive from a pressurized bore hole |
| 10/03/1978 | US4117897 Drill bit |
| 10/03/1978 | US4117895 Apparatus and method for enlarging underground arcuate bore holes |