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| Number | Title | Issue Date |
| 7191853 | Hole cleaning and/or forming tool A tool for cleaning and/or forming holes, the tool having a shaft, the shaft having a lower end and at least two buckets attached adjacent to the lower end of the shaft, each bucket having an open mouth which extends radially from the axis of the shaft, consequently... | 03/20/2007 |
| 7032692 | Drilling device for earth drill Locking elements 3d and 3j are provided at an inner member 3 connected to a kelly bar 1, and a locking element bearing plate 6f is provided at an outer member 6. The outer member 6 includes a cyli... | 04/25/2006 |
| 6863136 | Smart-ultrasonic/sonic driller/corer Apparatus for probing, sensing, testing penetrating and sampling a medium generally includes an actuator (12) for generating vibrations at ultrasonic frequencies and a horn (14) coupled to the actuator (12) for amplifying the actuator vibrations... | 03/08/2005 |
| 6655476 | Earth boring bit An earth boring bit for boring a hole having a predetermined depth into the earth. The earth boring bit includes a cylindrical drum for being mounted for rotation on the end of a boom of a mobile machine and connected to and rotated by a power supply moun... | 12/02/2003 |
| 6533048 | Earth boring bit An earth boring bit for boring a hole having a predetermined depth into the earth. The earth boring bit includes a cylindrical drum for being mounted for rotation on the end of a boom of a mobile machine and connected to and rotated by a power supply moun... | 03/18/2003 |
| 5269384 | Method and apparatus for cleaning a bore hole A hole cleaning device 100 includes a housing having a porous region to communicate cuttings from a bore hole to the interior of the housing. A Venturi-effect pump creates a suction to draw cuttings from the hole into the housing. An outlet pipe coupled t... | 12/14/1993 |
| 4893684 | Method of changing well fluid A well bore annulus wiper plug is disclosed. The wiper plug has a central body and inner and outer elastomeric ribs. The ribs are generally in the shape of truncated cones. To operate the device, it is inserted in the annular space between well casing and... | 01/16/1990 |
| 4884638 | Soil coring device with a core ejector mechanism A soil coring device with a core ejector mechanism that has a cylindrical cutting tube with two (2) 180 degree opposed tee slots that serve as a guide for an ejection plate, affixed to a cylindrical cutting tube is a tube with a vertically oriented slot a... | 12/05/1989 |
| 4106576 | Sampling tube cleaning device A sampling tube cleaning device adapted for removable mounting on a soil sample core extraction tool, the tube cleaning device including a handle portion and a cleaning head connected to the handle portion, the cleaning head further comprising a first cle... | 08/15/1978 |
