Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7308956 | Method of securing a rotary cutter to a body of a down hole tool and a rotary cutter assembly A rotary cutter assembly constructed in accordance with this method of securing a rotary cutter to a body has a cutter pocket with a first shoulder and a truncated second shoulder. A receptacle extends into the first shoulder. A first retainer retains a first axle e... | 12/18/2007 |
| 6527066 | Hole opener with multisized, replaceable arms and cutters A hole opener (10) having a tubular body (11) with threaded ends (12, 14) for connection in a drill string. The hole opener provides slots or grooves (21, 21') along its longitudinal axis (16) into which are inserted cutter arm support members (30, 30', 6... | 03/04/2003 |
| 5381868 | Sealed bearing roller reamer The roller reamer drilling tool includes an elongated body having a fluid circulation bore. A plurality of roller reamer units are mounted circumferentially about the body and are capable of being installed as units within a series of pockets machined wit... | 01/17/1995 |
| 4792000 | Method and apparatus for well drilling A drilling tool for use in drilling operations for providing shock absorption capability and lateral support to the rotary drill string. The telescoping axial load shock absorber is positioned immediately adjacent at least one lateral support provided by ... | 12/20/1988 |
| 4765417 | Reaming apparatus for well drilling A drilling tool for use in drilling operations for providing shock absorption capability and lateral support to the rotary drill string. The telescoping axial load shock absorber is positioned immediately adjacent at least one lateral support provided by ... | 08/23/1988 |
| 4561508 | Roller-reamer A roller-reamer structure wherein for each roller shaft, the shaft is tightly, but releasably secured, both radial and thrust bearings being provided for relatively moving roller and shaft surfaces. The shaft is held in the various embodiments within acco... | 12/31/1985 |
| 4548284 | Roller ball retention of reamer cutter assembly A roller reamer/stabilizer tool is shown with rolling cutter assemblies removeably retained within elongated pockets in the body of the tool by cap members capturing opposing ends of the cutter axle pin. The cap members are received in sockets adjacent op... | 10/22/1985 |
| 4542797 | Roller reamer A roller-reamer structure wherein for each roller shaft, the shaft is tightly, but releasably secured, both radial and thrust bearings being provided for relatively moving roller and shaft surfaces. The shaft is held in the various embodiments within acco... | 09/24/1985 |
| 4508184 | Roller reamer/stabilizer A roller reamer/stabilizer apparatus for use on a drill string assembly. The apparatus includes a reamer body which has a number of pockets formed in the body. A cutter assembly is anchored in each pocket. The cutter assembly includes a bearing pin on whi... | 04/02/1985 |
| 4497384 | Reamer disassembly A wall contacting device, such as a roller reamer used in earth boring, includes a block, e.g. supporting one end of a roller shaft, making an interference fit with a socket in the body of the device, there being tool passage means between the body and bl... | 02/05/1985 |
| 4480704 | Reamer A reamer used in earth boring by the rotary method includes a body having a plurality of sockets in its outer periphery. Upper and lower blocks are disposed in the socket for supporting a shaft. A roller is rotatably mounted on the shaft with the inner pe... | 11/06/1984 |
| 4262760 | Reamer-stabilizer A drilling fluid roller reamer-stabilizer includes a tubular body having threaded pin and box connectors at each end adapted to be connected in a drill string and providing a fluid passage connecting the upper part of the drill string with the lower part.... | 04/21/1981 |
| 4226291 | Reamer stabilizer for rock drills A reamer and stabilizer assembly for rock drills having a substantially cylindrical body provided with a threaded end socket for connection to a drill stem, the body having circumferentially spaced longitudinally extending recesses for receiving reaming a... | 10/07/1980 |
| 4141421 | Under reamer The present invention consists of an under reamer tool for enlarging, scraping or smoothing a well bore. The tool is attached to a conventional drill string above a conventional bit and involves cutting elements that have retractable cutters arranged for ... | 02/27/1979 |
