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| Number | Title | Issue Date |
| 7628223 | Rock drilling device A rock drilling machine includes a sleeve having openings surrounding a portion of a lubrication channel. A groove surrounds the sleeve, and one end of a second channel is connected to the groove. The other end of the second channel is connected to a lubrication poi... | 12/08/2009 |
| 7213660 | Washpipe seal A controlled leakage seal assembly having a first stationary portion adapted to be connected in substantially fluid-tight relation to a source of drilling fluid and a second portion adapted to be connected in substantially fluid-tight relation to a rotary portion in... | 05/08/2007 |
| 7040417 | Drilling systems The present invention discloses, in certain aspects, systems and methods for producing cyclical impacts and, in certain aspects for moving a drilling apparatus for drilling a borehole in a formation, the system in certain embodiments including a housing with a longi... | 05/09/2006 |
| 6976298 | Methods and apparatus for connecting tubulars using a top drive An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a stator attachable to said top drive, and a supporting member for supporting a tool, wherein means are provided to allow substantially horizontal movement of said s... | 12/20/2005 |
| 6758287 | Support for supporting a power tool on a displacement carriage A support for supporting a power tool (3) on a displacement carriage (2) and including an attachment element (7) for connecting the power tool (3) with the carriage (2), and a bolt insertable into an eyelet (8) of the power ... | 07/06/2004 |
| 6575254 | Electrical hand operated tool driving device with an electropneumatic striking mechanism An electrical hand operated tool driving device (1), such as a hammer drill, a combination hammer or a chipping hammer, has an electropneumatic striking mechanism (2), for which a cooling medium (8), for cooling the striking mechanism (2), flows through a... | 06/10/2003 |
| 6220369 | Scrap removing and tool cooling device for a front holding end of a tool spindle of a machine tool A scrap removing and tool cooling device includes a cooling air conduit adapted to be disposed in a housing of a machine tool and extending in an axial direction parallel to a tool spindle of the machine tool. The cooling air conduit includes an inlet for... | 04/24/2001 |
| 5370194 | Drive head assembly for drilling machine The drive head assembly for a drilling machine includes a drive head body having a cavity with an upper portion and a lower portion. A bolt is located in the upper portion of the drive head body cavity, and a collet is located in the lower portion of the ... | 12/06/1994 |
| 5195598 | Drill head assembly An improved rotary drill head assembly including a drill head cover having an upper portion, a rotatable drill retaining socket having an outer surface and a support member having an upper portion. The socket extends above the support member. A flinger at... | 03/23/1993 |
| 5193626 | Drilling device A drilling device including a hydraulically actuated drive for exerting an oscillatory action on the drive including the drive element, inserting device for hoses conducting a working medium to a pressure-actuated hammer mounted on a front end of the rod ... | 03/16/1993 |
| 4993501 | Hydraulic hammer in particular for use in dusty and/or corrosive environments A hydraulic hammer is provided, suitable for use as a crust-breaker of aluminum electrolysis pots, having a hydraulically actuated beating mass reciprocally movable in a cylindr to strike against a tool, an intake duct with a filter and a one way valve fo... | 02/19/1991 |
| 4815546 | Top head drive assembly with axially movable quill A top head drive assembly includes a tubular quill having a central passageway aligned with an axis. The quill is supported for rotation on a load beam included in the top head drive assembly such that the quill is movable along the axis through a range o... | 03/28/1989 |
| 4697965 | Apparatus for preventing invasion of cutting liquid in replaceable head type machine tool An accumulator tank is mounted on a working head of a replaceable head type machine tool. The tank is connected to each spindle housing on the head to deliver a pressure fluid and jet the same forwardly through the interior of the housing and out an inser... | 10/06/1987 |
| 4681170 | Rock drills for drilling continuously arrayed bores A rock drill for drilling a plurality of arrayed continuous bores includes a plurality of rods positioned so as to be able to drill several arrayed continuous bores, a rotating member to give rotation to the rods and a single percussion member which impar... | 07/21/1987 |
| 4655302 | Rotating coupling There is described a coupling for in use lifting and supporting oil drilling strings while allowing rotation of the drill strike and calculation of mud through the drill. The coupling comprises an upper body and a lower body. The lower body is rotatably m... | 04/07/1987 |
| 4487271 | Portable core drill A portable core drill adapted for sampling dense mineral specimens or the like by urging a fluid cooled/lubricated tubular drill bit into a dense mineral mass from which a sample is to be extracted is comprised of a drive member for imparting a drilling-e... | 12/11/1984 |
| 4401168 | Impact applying mechanism There is disclosed an impact applying mechanism, particularly as applied in a subterranean drilling apparatus, and comprising a cylinder (13) arranged with its axis substantially vertical and connected to the member to which impact is to be applied, a pis... | 08/30/1983 |
| 4314611 | Apparatus for supporting and rotating a down hole tubular A top head drive unit for an earth boring apparatus including a derrick comprises a support member guided along the derrick. The support member includes a pair of spherical roller bearings which support a shaft adapted for connection to a drill string. Th... | 02/09/1982 |
| 4226447 | Swivel apparatus Swivel apparatus suspended for handling pipe joints to be added to or taken from a drill string including powered apparatus connected to a cable for raising and lowering the swivel apparatus. The swivel apparatus may comprise an upper stationary section a... | 10/07/1980 |
| 4116287 | Well drilling assembly and method A well drilling assembly including a platform adapted to support a person while drilling a well therebeneath through an opening in the platform includes a clamp assembly carried by the platform and mounted for rotation with respect thereto. The clamp asse... | 09/26/1978 |
| 4103745 | Portable drilling machine The present invention relates to drilling equipment. The portable drilling machine comprises a derrick having longitudinal racks guiding a vertical traverse mechanism carrying a traverse having a means designed for rotation of a drill pipe during the dril... | 08/01/1978 |
| 4099387 | Sheet steel pile clamp The invention relates to a method and apparatus for producing steel piling and a machine for driving the same in earthen strata and further teaches fabrication of the steel piling either by a rolling mill or an extrusion machine, said piling being provide... | 07/11/1978 |
| 4020909 | Portable earth drilling apparatus Earth drilling apparatus comprising an extensible mast constituted by a fixed lower ramp and an upper slide mounted with capability of longitudinal sliding on the fixed ramp. A rotation head for driving a drill string is movable on and guided over the len... | 05/03/1977 |
| 3949818 | Hydraulic drilling rig and power swivel A two-ram hydraulic drilling rig is provided with a lateral support frame. The rams have rods connected through a tension structure with a power swivel. The power swivel has a removable swivel stem assembly for allowing through-swivel positioning of drill... | 04/13/1976 |
