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| Number | Title | Issue Date |
| 8028772 | Internally dampened percussion rock drill A percussion drill, and methods of using the same, including a shank in mechanical alignment with a piston-hammer and a valve in fluid communication with the piston-hammer. The percussion drill further includes an internal hydraulic dampening system for reducing the... | 10/04/2011 |
| 7775304 | Apparatus and method for driving casing or conductor pipe Apparatus for driving an open-ended conductor pipe into the ground. The apparatus includes, in combination, an open-ended conductor pipe capable of being driven into the ground, a drill string, a device for pumping fluid through the drill string, an arrangement for ... | 08/17/2010 |
| 7419018 | Cam assembly in a downhole component In one aspect of the invention, a downhole drill string component has a shaft being axially fixed at a first location to an inner surface of an opening in a tubular body. A mechanism is axially fixed to the inner surface of the opening at a second location and is in... | 09/02/2008 |
| 7207401 | One trip milling system The side tracking system includes a window mill having a full diameter cutting surface and a reduced diameter tapered cutting surface and a whipstock having a ramp engaging the reduced diameter cutting surface. The materials of the whipstock have a first cutablity a... | 04/24/2007 |
| 6681875 | Guide tube of a drill string configured to facilitate unscrewing thereof from a member of the drill string A guide tube for use in a rock drill string includes a main portion, a sleeve disposed at a first end of the main portion, and a male thread portion disposed at a second end of the main portion. The sleeve forms a recess having a female thread. A flush ch... | 01/27/2004 |
| 6675919 | Tubular piling apparatus and method A tubular piling apparatus and method for penetrating the soil comprises, in a preferred embodiment, elements such as a drive shoe and/or other earth displacing structures which may be, in one presently preferred embodiment, of larger outer diameter than ... | 01/13/2004 |
| 6585062 | Steerable directional drilling reamer A reamer with a planetary gear train for use in horizontal directional drilling allows a reaming surface of the reamer to rotate at slower speeds while simultaneously conveying more power to the reamer via fast drill string rotational speeds. The reamer m... | 07/01/2003 |
| 6564887 | Core drill The present invention relates to a core drill wherein initial drilling workability is improved through reduced frictional resistance on the segment tips, when they are seated on the surface of an article to start cutting operation, and wherein cutting scr... | 05/20/2003 |
| 6439322 | Downhole hammer-type core barrel and method of using same A core barrel has a plurality of pneumatic downhole hammer drills disposed around the perimeter of its working end for drilling piles in the ground for use in foundations, secant piles, and the like. The core barrel includes a slurry port and an air port ... | 08/27/2002 |
| 6213230 | Drilling tool especially for the rotary percussion drilling of preferably rock A drilling tool, especially for the rotary percussion drilling of preferably rock, has a drilling body equipped toward the drilling side preferably with cutting bits, and with an axially arranged bore for receiving an exchangeable centering drill. In orde... | 04/10/2001 |
| 6189630 | Downhole hammer-type core barrel A core barrel has a plurality of pneumatic downhole hammer drills disposed around the perimeter of its working end for drilling piles in the ground for use in foundations, secant piles, and the like. The core barrel includes a slurry port and an air port ... | 02/20/2001 |
| 6116827 | Drilling tool A drilling tool, in particular for rotary percussion drilling preferably of rock, is proposed, with a drill body preferably equipped with cutting tips toward the drilling side and with an axially arranged bore for receiving an exchangeable center drill. I... | 09/12/2000 |
| 6035950 | Method and apparatus for fluid and soil sampling A sampling device includes a barrel having a downhole end, an exterior surface, an interior surface defining a hollow interior, and an open end at the downhole end of the hollow interior. A fluid entrance penetrates the exterior surface. A fluid path havi... | 03/14/2000 |
| 6000481 | Method and apparatus for environmental sampling A sampling device capable of collecting fluid and soil samples includes a sensor for measuring a fluid parameter. The sensor is coupled to a monitor which records the fluid parameter measurements. A regenerative gas is passed through the sensor to regener... | 12/14/1999 |
| 5791424 | Drill bit for the rotary-percussive drilling of preferably rock, concrete or the like A drill bit is proposed, in particular for the rotary-percussive drilling of preferably rock, concrete or the like, which includes a thin-walled cylindrical drilling body (106) open to the drilling side and a drill-bit base (20) extending essentially radi... | 08/11/1998 |
| 5743343 | Method and apparatus for fluid and soil sampling A sampling device includes a barrel having a downhole end, an exterior surface, an interior surface defining a hollow interior, and an open end at the downhole end of the hollow interior. A fluid entrance penetrates the exterior surface. A fluid path havi... | 04/28/1998 |
| 5421419 | Method and apparatus for fluid and soil sampling A sampling device includes a barrel having a downhole end, an exterior surface, an interior surface defining a hollow interior, and an open end at the downhole end of the hollow interior. A fluid entrance penetrates the exterior surface. A fluid path havi... | 06/06/1995 |
| 5186266 | Multi-walled drill string for exploration-sampling drilling systems The drilling system of this invention is specifically adapted to reverse-circulation sample drilling employing a downhole hammer drill. The drilling head configuration provides for simultaneous feeding into a multi-walled drill string with drilling mud, c... | 02/16/1993 |
| 4783123 | Tool bit for impact ripping of a mine face A percussive tool, and a tool bit for the percussive tool for cutting the face of a deposit to be extracted. The tool bit is a circularly cylindrical columnar structure driven axially by the percussive tool. It is laterally unsupported and unobstructed fo... | 11/08/1988 |
| 4702327 | Core sample taking bullet construction In the preferred and illustrated embodiment of the core sample bullet construction, a multi-piece construction is set forth. There is a forward, or removable, nose portion. It nests with and connects to a carrier portion. The two portions together define ... | 10/27/1987 |
| 4569403 | Formation sampling bullet Sampling bullets of the type which are fired into rock formations adjacent a well bore. Surprising and unexpected increases in the service life of the bullet and reliability in obtaining and retrieving core samples have been achieved.... | 02/11/1986 |
| 4526242 | Drilling device A drilling device which can be lowered in a drill hole consists of a drive device, a drill which is rotated by this drive device and a clamping device formed as a unit which can be engaged with the inside wall of the drill hole and serves to transfer the ... | 07/02/1985 |
| 4369002 | Method of emptying pipes driven into earth in nontrench laying and device for carrying same into effect A method of emptying pipes driven into earth in nontrench laying is disclosed, wherein spoil is dug and picked up in the process of movement of a working element by vibratory shock loads, a spoil cushion is simultaneously formed in the pipe for the purpos... | 01/18/1983 |
| 4321974 | Annular drilling hammer An annular drilling hammer having an annular bore crown guided between an outer tube and an inner tube. An annular hammer piston periodically strikes the bore crown and has a piston member that is guided in a cylindrical chamber having control apertures w... | 03/30/1982 |
| 4280573 | Rock-breaking tool for percussive-action machines A rock-breaking tool for preferable use in self-propelled percussive machines for boring wells, comprising a casing with a pointed portion and an end face. The casing has an annular cutting edge formed by the pointed portion and inner tapered surface ther... | 07/28/1981 |
| 4202420 | Rock drill with hard metal drilling head A rock drill for rotary blow drilling with a drilling head arranged at the free end of the drill shaft, which at least partially consists of hard metal. The drilling head the end face of which is circular disc shaped or circular ring shaped includes a for... | 05/13/1980 |
| 4146098 | Masonry cutting tool Masonry cutting tool used in conjunction with a pneumatic mechanism, e.g., air-operated hammer, comprising a drill head, a plurality of cutting prongs provided on the drill head, the drill head connected to a hammer shank, and a handle removably joined to... | 03/27/1979 |
| 4002214 | Drilling tool, especially for hammer drills A boring tool, especially for drill hammers with a hollow drill core bit, which the inner thread of the hollow drill core bit connected directly to the borer shank and in which a corresponding outer thread provided on a holding mandrel form a part of the... | 01/11/1977 |
| 3978932 | Apparatus and method for obtaining undisturbed soil core samples Large-diameter, undisturbed soil core samples were obtained from a variety of soils. Handling and fracturing of the undisturbed soil cores were minimized by encasing the cores in heat-shrinkable plastic tubes during sampling operations.... | 09/07/1976 |
| 3977479 | Geological exploration method and apparatus A method of obtaining geological specimens is disclosed along with methods of producing a geological or geochemical map and apparatus for accomplishing the method. A fixed wing or other airborne vehicle, such as a light plane or a helicopter, is operated ... | 08/31/1976 |
| 3955631 | Soil sampler The present sampler is adapted to take soil samples from the ground surface, from a borehole sunk by other tools, as well as for drilling shallow boreholes. The sampler is provided with an air-operated percussion mechanism and a soil sample receiving slee... | 05/11/1976 |
| 3934662 | Core bit An impact type of anvil core bit includes a body having a central opening through its bottom drilling face, a plurality of spaced cutters, such as sintered tungsten carbide buttons, being secured to the body and extending downwardly from the face to drill... | 01/27/1976 |
