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| Number | Title | Issue Date |
| 7331404 | Lubrication system for impact wrenches A lubrication apparatus, system and method for a tool is disclosed. The tool includes a rotating impact assembly and the lubrication apparatus, system and method directs lubricant from a radially outward position to a radially inward position in the impact assembly.... | 02/19/2008 |
| 7252161 | Method and apparatus with slips assembly for coupling tubulars without interruption of circulation A slips assembly which comprises a plurality of slip segments which, when positioned adjacent to each other, form a collar, which collar is larger than the diameter of the tubular body of the tubular at the top of the drill string and smaller than the diameter the u... | 08/07/2007 |
| 7188683 | Drilling method A system and method is disclosed for continuously supplying drilling fluid down a bore hole while adding or removing tubulars. ... | 03/13/2007 |
| 7117938 | Drill pipe connecting and disconnecting apparatus Drilling rig apparatus for connecting and disconnecting well pipe at a drilling rig. A remotely controlled power wrench assembly is mounted on a remotely controlled lifting mechanism attached to a base spaced about the well axis on the rig floor. The wrench assembly... | 10/10/2006 |
| 6651754 | Apparatus for moving earth boring machines Apparatus for moving an earth boring machine along a track includes a module which is releasably connected as a unit to the earth boring machine. The module includes a support plate releasably connected to the earth boring machine.... | 11/25/2003 |
| 6343662 | Hydraulic drilling rig A multi-purpose drilling rig has a movable pipe support cradle which moves horizontally to transfer drill pipe from a storage area to the well being drilled, and vice versa. The cradle travels along a roof platform supported by load-bearing hydraulic lift... | 02/05/2002 |
| 6216798 | Work unit for machine tool, with linear electric motor for axial movement of the spindle The invention concerns the work units for automatic machine tools in which a spindle (5) moves in translation and rotates with respect to a work axis (Z). More particularly in these units, in order to obtain the rotation/translation of the spindle, the la... | 04/17/2001 |
| 6112829 | Rock drill air leg control system The invention relates to a rock drill air leg control system incorporated in the backhead (10) of a rock drill. The system comprises a single spool valve (22) having two manual controls (46, 53), one for setting a trust applied by an air leg to a rock dri... | 09/05/2000 |
| 6068066 | Hydraulic drilling rig A multi-purpose drilling rig has a movable pipe support cradle which moves horizontally to transfer drill pipe from a storage area to the well being drilled, and vice versa. The cradle travels along a roof platform supported by load-bearing hydraulic lift... | 05/30/2000 |
| 5862724 | Screw driving method and screw driving apparatus When a screw 14 is driven into workpieces 61 and 62, it is possible to reduce any reaction that a driver bit 11 is raised so as to obtain fast and reliable screw driving. In the screw driving method of the present invention, the screw is advanced with a s... | 01/26/1999 |
| 5592993 | Directional auger attachment The present invention is directed to an auger attachment which is mounted on the stick of a backhoe which provides directional capabilities to the auger. More specifically, the auger attachment includes an outer body, an inner telescoping body and a pisto... | 01/14/1997 |
| 5231902 | Pneumatically operated screw driver A pneumatically operated screw driver having a pneumatically operated rotor rotatably supported in an outer frame. The rotor is only rotatable about its axis. A moving unit is slidably disposed within the rotor. The moving unit has an upper piston and is ... | 08/03/1993 |
| 4977966 | Seawater hydraulic rotary impact tool This invention pertains to a rotary impact tool which utilizes pressurized eawater as the working fluid. When an operator engages a trigger on a novel control handle and valve assembly, pressurized seawater enters the rotary impact tool through the control... | 12/18/1990 |
| 4691787 | Earth auger An earth auger is provided which can be compacted, lightened and adjusted with respect to feed speed according to geology. The earth auger has a screw having a spiral blade provided with notches arranged axially linearly. A first rotary member and a secon... | 09/08/1987 |
| 4557338 | Tool, particularly a boring tool This invention relates to a fluid pressure operated tool of the type having an axially reciprocatable and rotatable shaft to which a work piece such as a rock drill is attachable. The tool is driven by a planetary piston type of motor with a rotary extern... | 12/10/1985 |
| 4478292 | Pipe gripping apparatus with interlocking plates In accordance with an illustrative embodiment of the present invention, the individual slip members of a pipe handling apparatus are maintained in substantially the same horizontal plane by plate members attached to the top of the respective slip members,... | 10/23/1984 |
| 4417628 | Earth boring apparatus An apparatus for boring horizontally extending holes at shallow depths beneath the surface of the earth having a frame detachably connected to the bucket of a backhoe. The frame is rigidly connected to the bucket for movement thereby and includes a coupli... | 11/29/1983 |
| 4406332 | Rotary earth boring tool The present invention provides a nonstalling system for advancing a boring tool in situations where the inclination of the bore hole with respect to the vertical is such that the force of gravity does not provide effective forward thrust. A hydraulically ... | 09/27/1983 |
| 4315552 | Raise drill apparatus A drilling apparatus includes a ground engaging base, a torque transmitting apparatus for engaging and transmitting torque to drill pipe, and hydraulic cylinders connected to the base for moving the torque transmitting apparatus back and forth along the d... | 02/16/1982 |
| 4257489 | Pressure fluid powered machine tool A pressure fluid powered machine tool comprising a rotary motor unit displaceably guided in a cylinder bore of a housing to accomplish a combined rotary and linear movement of a working tool such as a drilling or tapping tool. The motor unit is provided w... | 03/24/1981 |
| 4172615 | Roof bolting apparatus The novel apparatus comprises a first, power unit module of limited mobility and a second, bolter unit which is flexibly and disengageably coupled to the first unit by means of an umbilical line. In one embodiment of the invention, the power module compri... | 10/30/1979 |
| 3986564 | Well rig An improved, multipurpose oil well rig employing hydraulically actuable components. Two, three, or four or more piston cylinder fluid motors are provided in the rig lift system, powered either by a power unit having high pressure, low volume pumping chara... | 10/19/1976 |
