| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 09/03/1993 | WO1993018272A1 Reversible bit bearing for percussion drill |
| 09/03/1993 | CA2109302A1 Reversible bit bearing |
| 09/01/1993 | EP0558097A1 Boring arm |
| 08/31/1993 | US5240083 Device for removing drillhole debris |
| 08/24/1993 | US5238073 Uphole hammer |
| 08/24/1993 | US5238061 Gas operated |
| 08/19/1993 | DE4143418A1 Pneumatic type hammer unit |
| 08/10/1993 | US5234061 Percussion machine, for example self-propelled ram boring machine |
| 08/10/1993 | CA1321189C Activated earth drill |
| 08/05/1993 | WO1993015299A1 Down-the-hole rock drill |
| 08/04/1993 | CN2139620Y Automatic drilling manostat |
| 08/03/1993 | CA1320944C Method and apparatus for continuous pilot hole coring |
| 07/27/1993 | US5230520 Hydrodynamically lubricated rotary shaft seal having twist resistant geometry |
| 07/27/1993 | US5230388 Method and apparatus for cleaning a bore hole using a rotary pump |
| 07/22/1993 | DE4227065A1 Hydropneumatic hammer drill for mining and road construction - has stepped diameter striking piston which divides cylinder into four chambers and permits short passages between valve and cylinder |
| 07/15/1993 | DE4200574A1 Sleeve-valve-controlled pneumatic in-hole impact drill - has sleeve valve tripped by movement of striking piston to allow complete filling of both working chambers with compressed air. |
| 07/13/1993 | US5226487 Pneumopercussive machine |
| 06/30/1993 | EP0549549A1 Down-the-hole drill |
| 06/30/1993 | CN1073740A Blade-type underground power drilling tool |
| 06/29/1993 | CA1319675C Apparatus for vibrating a pipe string in a borehole |
| 06/17/1993 | DE4213332C1 Drive for underground prodn. of conduits - comprises outer appts. area in which a striker and floor compressor are integrated |
| 06/09/1993 | CN1072988A An apparatus and method for removing debris from a drillhole |
| 06/08/1993 | US5217080 Sealing system for a sealed bearing assembly |
| 06/08/1993 | CA1318846C Energy collection method in a single point of a drilling well by pulling of a massive column |
| 06/02/1993 | EP0543806A1 Hydraulic down-the-hole rock drill. |
| 06/01/1993 | US5215151 Method and apparatus for drilling bore holes under pressure |
| 05/27/1993 | WO1993010326A1 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation |
| 05/27/1993 | CA2123889A1 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation |
| 05/27/1993 | CA2081707A1 Triazine reinforcement and curing of hydrogenated acrylonitrile butadiene rubber |
| 05/26/1993 | EP0543461A2 High performance bearing pad for thrust bearing |
| 05/25/1993 | US5213169 Exploration-sampling drilling system |
| 05/23/1993 | CA2083427A1 High performance bearing pad for thrust bearing |
| 05/22/1993 | CA2082488A1 Mechanically actuated fluid control device for downhole fluid motor |
| 05/13/1993 | DE4142733A1 Bohrverfahren und einrichtung zur ausuebung des verfahrens Drilling method and device for performing the method |
| 05/13/1993 | DE4134912A1 Impact tool for pipe jacking through ground - consists of driving tube with cutting head housing piston, which activates chisel headed striker |
| 05/11/1993 | US5209577 Downhole rotating machine having compliant radial bearings |
| 05/09/1993 | WO1993009328A1 Drilling process and device |
| 05/04/1993 | US5207283 Reversible bit bearing |
| 05/04/1993 | US5207280 Device in hammer machines |
| 04/29/1993 | WO1993008374A1 Wing motor |
| 04/29/1993 | DE4235936A1 Underground pipes jacking mechanism - has drive set with axial piston hydraulic motor with rams on drive head tubular housing |
| 04/29/1993 | DE4134956A1 Drucklufthammer Drucklufthammer |
| 04/27/1993 | US5205366 Superposed drilling device |
| 04/27/1993 | US5205365 Pressure assisted running of tubulars |
| 04/27/1993 | US5205363 Porting system for pneumatic impact hammer |
| 04/24/1993 | WO1993008364A1 A pneumatic hammer |
| 04/24/1993 | WO1993008363A1 A pneumatic hammer |
| 04/24/1993 | CA2097068A1 Pneumatic hammer |
| 04/24/1993 | CA2097067A1 Pneumatic hammer |
| 04/06/1993 | US5199514 Seal for well drilling assembly |
| 04/06/1993 | US5199504 High efficiency pneumatic impacting mechanism with a plunger valve |
| 04/06/1993 | US5199151 Method for making a pneumatic ground piercing tool |
| 04/01/1993 | WO1993006334A1 Apparatus and method for removing drillhole debris |
| 04/01/1993 | WO1993006331A1 Well drilling pressure control method and apparatus |
| 04/01/1993 | CA2119249A1 Apparatus and method for removing drillhole debris |
| 03/30/1993 | CA1315272C Drilling apparatus |
| 03/23/1993 | US5195754 Laterally translating seal carrier for a drilling mud motor sealed bearing assembly |
| 03/23/1993 | CA1314864C Compressive seal and pressure control arrangements for downhole tools |
| 03/23/1993 | CA1314863C Universal joint arrangement for downhole tools |
| 03/17/1993 | EP0531446A1 Downhole fluid motor composite torque shaft. |
| 03/17/1993 | EP0531439A1 Soil displacement hammer with reversing mechanism. |
| 03/16/1993 | US5193627 Apparatus for controlling a ramming device |
| 03/16/1993 | US5193626 Drilling device |
| 03/16/1993 | CA1314582C Electric motor |
| 03/10/1993 | CN1069791A Screwarbor drilling tool rotor with nitridizing surface treatment |
| 03/03/1993 | EP0530045A1 Modulated bias units for steerable rotary drilling systems |
| 03/02/1993 | US5190353 Rock cutting tool having eccentric drive |
| 02/16/1993 | US5186265 Retrievable bit and eccentric reamer assembly |
| 02/16/1993 | US5186264 Device for guiding a drilling tool into a well and for exerting thereon a hydraulic force |
| 02/09/1993 | US5184676 Self-propelled apparatus |
| 02/03/1993 | CA2048381A1 Apparatus for gripping a down hole tubular for rotation |
| 02/02/1993 | US5183121 Submersible pneumatic drilling unit |
| 01/27/1993 | EP0524259A1 Hammer device. |
| 01/27/1993 | EP0524183A1 A borehole, as well as a method and an apparatus for forming it. |
| 01/14/1993 | DE4134918C1 Deep-hole hammer for use in drilling - includes control edges on movable sliders which move so edge is in pressurised cylinder chamber |
| 01/13/1993 | EP0522446A2 Method for controlling the direction of an earth drilling apparatus and device for making bore holes |
| 12/30/1992 | EP0520733A1 Steerable rotary drilling system |
| 12/29/1992 | US5174392 Mechanically actuated fluid control device for downhole fluid motor |
| 12/29/1992 | US5174390 Modular cluster drill apparatus |
| 12/23/1992 | CN2125687U Electromagnetic vortex brake scr device |
| 12/22/1992 | US5172771 Reversible impact-operated boring tool |
| 12/15/1992 | US5171139 Moineau motor with conduits through the stator |
| 12/15/1992 | US5171138 Composite stator construction for downhole drilling motors |
| 12/09/1992 | EP0517316A1 Diamond thrust bearing and method for manufacturing same |
| 12/08/1992 | US5168942 For measuring earth formation while drilling in an earth formation |
| 12/05/1992 | CA2070352A1 Diamond thrust bearing and method for manufacturing same |
| 12/02/1992 | EP0516599A1 Device in hammer machines |
| 11/26/1992 | WO1992020896A1 Soil displacement hammer with movable head |
| 11/26/1992 | DE4217293A1 Laying drainage and sewage pipes without excavating - using water-jet mounted at front of pipe string which removes spoil internally as pipe driven through soil |
| 11/26/1992 | CA2102911A1 Soil displacement hammer with movable head |
| 11/24/1992 | US5165492 Apparatus for preventing separation of a down-hole motor from a drill string |
| 11/12/1992 | WO1992019835A1 Hydraulically driven drilling motor for deep drilling |
| 11/12/1992 | DE4113986A1 Hydraulisch angetriebener bohrmotor zum tiefbohren Hydraulically driven drill motor for deep drilling |
| 11/10/1992 | US5161626 Method for embedding lines, anchoring cables, and sinking wells |
| 11/04/1992 | EP0418402A4 Device for making holes in the ground |
| 10/21/1992 | EP0340280A4 Self-propelled subsoil penetrating tool system |
| 10/20/1992 | US5156223 Fluid operated vibratory jar with rotating bit |
| 10/20/1992 | US5156222 Directional drilling tool apparatus and method |
| 10/13/1992 | WO1992018740A1 Oil, gas or geothermal drilling apparatus |
| 10/13/1992 | US5154244 Transmission sleeve for a down hole hammer |