| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 10/07/1992 | EP0507610A1 Uphole hammer |
| 10/06/1992 | CA1308314C Pneumatic percussive device |
| 10/05/1992 | CA2065125A1 Uphole hammer |
| 09/30/1992 | EP0365612B1 Drill |
| 09/30/1992 | CN1064911A Vane-type power drilling tool for well |
| 09/29/1992 | US5150972 Method of increasing the off bottom load capacity of a bearing assembly |
| 09/29/1992 | CA1308153C Anti-blockage bearing |
| 09/29/1992 | CA1308093C Earth boring apparatus with control valve |
| 09/26/1992 | WO1992016718A1 A drilling equipment and a method for regulating its penetration |
| 09/26/1992 | CA2107099A1 A drilling equipment and a method for regulating its penetration |
| 09/24/1992 | DE4109215A1 Hammer drill tool - comprises housing with oscillating piston, and has cylindrical internal void in which control tube oscillates by compressed air power |
| 09/22/1992 | US5148878 Ram boring machine |
| 09/17/1992 | WO1992015766A1 Coring assembly for mounting on the end of a drill string |
| 09/17/1992 | CA2106691A1 Coring assembly for mounting on the end of a drill string |
| 09/16/1992 | EP0503275A2 Large bore hydraulic drilling jar |
| 09/15/1992 | CA1307459C Pipeline servicing tool |
| 09/07/1992 | CA2061784A1 Articulated coupling for use with a downhole drilling aparatus |
| 09/03/1992 | WO1992014904A1 Drill head with integral impact hammers |
| 09/01/1992 | US5143455 Bearing sleeve with notched end |
| 09/01/1992 | US5143162 Device for removing debris from a drillhole |
| 08/20/1992 | WO1992013682A1 Strike-action pneumatic device for trench-free replacing of pipelines |
| 08/18/1992 | US5139400 Progressive cavity drive train |
| 08/18/1992 | US5139096 Pneumatic percussion hammers |
| 08/18/1992 | US5139095 Method for removing debris from a drillhole |
| 08/18/1992 | CA1306458C Drilling tool |
| 08/11/1992 | CA1306244C Method and apparatus for controlling the force applied to a drill bit while drilling |
| 08/04/1992 | US5135060 Articulated coupling for use with a downhole drilling apparatus |
| 08/04/1992 | US5135059 Borehole drilling motor with flexible shaft coupling |
| 07/28/1992 | US5133416 Device for drilling holes in the ground |
| 07/23/1992 | WO1992012323A1 Hydraulic down-the-hole drilling machine |
| 07/21/1992 | US5131476 Down hole percussion drill apparatus |
| 07/21/1992 | CA1305331C Method and apparatus for building pipeline and shield tunnelling machine |
| 07/15/1992 | EP0494408A1 Method and device for enlarging a well |
| 06/30/1992 | US5125462 Quick-change ram boring head |
| 06/02/1992 | US5117922 Isolator assembly for a pneumatic underground piercing tool |
| 06/02/1992 | CA1302392C Gang drill construction |
| 05/31/1992 | WO1992009782A1 Casing assembly for a down-the-hole drill tool |
| 05/31/1992 | CA2097307A1 Casing assembly for a down-the-hole drill tool |
| 05/27/1992 | EP0486752A1 Directional drill string comprising a pipe with a shaft bearing |
| 05/26/1992 | US5116147 Anti-blockage bearing |
| 05/26/1992 | US5115875 Hammer drills for making boreholes |
| 05/26/1992 | US5115717 Ramming apparatus |
| 05/21/1992 | DE4036193A1 Eccentric drive for rolling and milling drilling tool - has separate drive for fast-running eccentric and slow-running casing with adjustable counterweight in tool casing |
| 05/20/1992 | CA2053481A1 Apparatus capable of moving in a tube, method of moving in a tube, and support mechanism |
| 05/19/1992 | US5113953 Directional drilling apparatus and method |
| 05/13/1992 | EP0484839A2 Reversible impact-operated boring tool |
| 05/13/1992 | EP0484701A1 Apparatus capable of moving in a tube, method of moving in a tube, and support mechanism |
| 05/13/1992 | EP0484672A1 Submersible pneumatic drilling unit |
| 05/12/1992 | US5112188 Multiple stage drag and dynamic turbine downhole motor |
| 05/12/1992 | CA1300592C Drill bit direct drive for deep well drilling tools |
| 05/10/1992 | CA2054925A1 Submersible pneumatic drilling unit |
| 05/05/1992 | US5109932 Impact borer, connector for embedding lines, anchoring cables, and sinking wells |
| 04/29/1992 | EP0482892A1 Apparatus for preventing separation of a down-hole motor from a drill string |
| 04/29/1992 | EP0482364A1 Combination thrust and radial bearing for use in down-hole drilling tools |
| 04/29/1992 | EP0265521B1 Rotor of downhole screw motor, method and device for making thereof |
| 04/28/1992 | US5107944 Down hole drills using spent driving fluid for flushing purposes |
| 04/27/1992 | CA2053683A1 Apparatus for preventing separation of a down-hole motor from a drill string |
| 04/27/1992 | CA2052181A1 Combination thrust and radial bearing for use in down-hole drilling tools |
| 04/22/1992 | EP0481767A1 Tubing cutting tool |
| 04/22/1992 | EP0481545A1 Drill head |
| 04/14/1992 | US5103921 Coring assembly for mounting on the end of a drill string |
| 04/08/1992 | CN1016205B Drill |
| 04/08/1992 | CN1016202B Hammer drills for making boreholes |
| 04/07/1992 | US5101916 Holes in the earth |
| 03/25/1992 | EP0477067A1 High efficiency pneumatic impacting mechanism with a plunger valve |
| 03/24/1992 | US5098258 Multiple stage drag turbine downhole motor |
| 03/19/1992 | WO1992004524A1 Method and device for digging a tunnel in consolidatable sub-soil |
| 03/17/1992 | US5096004 High pressure downhole progressive cavity drilling apparatus with lubricating flow restrictor |
| 03/17/1992 | US5096000 Process and apparatus for laying service lines without excavation |
| 03/17/1992 | US5095998 For excavation of earth channels |
| 03/12/1992 | DE4028265A1 Verfahren und vorrichtung zur kontinuierlichen erstellung von tunnel in alluvialen untergruenden nach dem verdraengungsprinzip Method and apparatus for the continuous creation of tunnel in alluvial untergruenden after verdraengungsprinzip |
| 03/10/1992 | US5094303 Impact apparatus and process for the control of impact apparatus |
| 03/05/1992 | DE4126426A1 Reset moment free roller or disc drill head - has motor and drill on common mounting in direct drive contact |
| 03/03/1992 | US5092687 Diamond thrust bearing and method for manufacturing same |
| 03/03/1992 | US5092411 Drilling apparatus |
| 02/26/1992 | CN2097300U Stabilizer for submerged electric pump |
| 02/25/1992 | US5090500 Replaceable wear sleeve for percussion drill |
| 02/25/1992 | US5090497 Flexible coupling for progressive cavity downhole drilling motor |
| 02/25/1992 | US5090487 Drill head with integral impact hammers |
| 02/25/1992 | CA2049586A1 Modular drop-in sealed bearing assembly for downhole drilling motors |
| 02/25/1992 | CA1296320C Mining process and apparatus |
| 02/25/1992 | CA1296319C Directly driven coring tool |
| 02/20/1992 | DE4131070A1 Hydraulically-driven drill hammer - has control valve sliding coaxially in striker piston |
| 02/19/1992 | EP0471065A1 Self propelled probe, particularly for penetrating a powdered material |
| 02/18/1992 | US5088568 Hydro-mechanical device for underground drilling |
| 02/11/1992 | US5086853 Large bore hydraulic drilling jar |
| 02/11/1992 | US5086851 Combination thrust and radial bearing for use in down-hole drilling tools |
| 02/11/1992 | US5086848 Reversible impact hole driller and method of reversing |
| 02/11/1992 | US5086808 Balanced sleeve control choke |
| 02/11/1992 | CA1295604C Pneumatic percussion hammer |
| 02/07/1992 | CA2048374A1 Hydraulic hammer |
| 02/05/1992 | EP0349610B1 Device for drilling essentially vertical boreholes |
| 02/04/1992 | US5085285 Compensating ring for a down hole hammer |
| 02/04/1992 | US5085284 Hybrid pneumatic percussion rock drill |
| 01/29/1992 | CN2094614U Impactor |
| 01/23/1992 | WO1992001138A1 Hydraulic down-the-hole rock drill |
| 01/22/1992 | EP0467642A2 Earth drilling system and method for controlling the direction of a borehole |
| 01/18/1992 | CA2047316A1 Drilling system and method for controlling the direction of holes being drilled or cored in subsurface formations |
| 01/17/1992 | WO1992001856A1 Variable geometry cluster drill |
| 01/17/1992 | CA2086758A1 Variable geometry cluster drill |