Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7222683 | Wellbore top drive systems An containerized top drive system including a container, top drive apparatus removably disposed within the container, an extension system for moving the top drive apparatus generally horizontally within a derrick, the top drive apparatus secured to the extension sys... | 05/29/2007 |
| 7213717 | Telescopic boom The within invention concerns a telescopic boom of a crane with a pivot section, telescopic sections that can telescope out of the pivot section, and a guying that has at least one guy stand housed to pivot on one of the sections, and at least one guy cable supporte... | 05/08/2007 |
| 7188686 | Top drive systems A top drive system for wellbore operations including a hollow bore alternating current permanent magnet motor with a motor bore therethrough, a planetary gear system coupled to the motor, the gear system having a gear system bore therethrough, a quill drivingly conn... | 03/13/2007 |
| 6969223 | Pipe handling apparatus A pipe handling apparatus for transporting pipe between a position adjacent a pipe storage rack and a rig floor elevated above the pipe storage rack is provided. The pipe handling apparatus includes a support frame, substantially horizontally disposed platform suppo... | 11/29/2005 |
| 6105684 | Roof bolter or a roof bolt installation apparatus The present invention relates to improvements in the operation and construction of roof bolters or roof bolt installation apparatus. The improvements comprise a roof bolter constructed so that the critical moving parts of its timber jack, feed frame, feed... | 08/22/2000 |
| 4650011 | Method and apparatus for drilling a hole in an ice formations and pumping water out from such hole An auger (16) and a pump unit (18) are mounted on opposite sides of a tower (42). Each is moved up and down the tower by a separate chain and sprocket drive (134, 146, 158, and 136, 148, 160). The assembly (16, 18, 42) is laterally shiftable in position, ... | 03/17/1987 |
| 4458768 | Top drive well drilling apparatus Well drilling apparatus including a powered drilling unit connectable to the upper end of a drill string and adapted to rotate it to drill a well, and a vertically extending guide track structure which guides the drilling unit for movement along the axis ... | 07/10/1984 |
| 4280772 | Leadless method and apparatus for driving piles A pile is lofted to a vertical position over a driving location. At a distance above its lower end the pile is embraced within a guide on an extensible rack on the crane chasis. Over the upper end of the pile a vertically elongate socket on the lower end ... | 07/28/1981 |
| 4262754 | Rotary drilling device with pivoting drill head assembly In a rotary drilling device for powering a drill string into subterranean strata and having a vertically alignable drill mast, a drill head assembly for applying rotational movement to the drill string, elevational means on which the head assembly is moun... | 04/21/1981 |
| 4166509 | Process for excavating and constructing tunnel and excavating device A process for excavating and constructing a tunnel, and an excavating device are disclosed. This process is directed to excavating and constructing a tunnel under a railway or a road on a banking or on level land in the direction transverse to the railway... | 09/04/1979 |
| 4047578 | Portable earth boring machine A portable earth boring machine for the boring of vertically inclined shafts and the insertion of pipeline casing sections characterized by a main frame portion that supports the auger drive and casing pusher apparatus, and a detachably mounted engine fra... | 09/13/1977 |
