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| Number | Title | Issue Date |
| 7293617 | Polycrystaline diamond compact insert reaming tool A reaming tool including a body adapted to couple to a drill string at both axial ends thereof, the body including a plurality of reaming blades affixed at azimuthally spaced apart locations around the circumference of the body, wherein selected ones of the pluralit... | 11/13/2007 |
| 7090034 | Reamer having toroidal crusher body and method of use The present invention provides a reamer (100) having at least one journal body (110) and at least one toroidal cutter body (116). The toroidal cutter body (116) has a maximum diameter (MD), an outer perimeter (OP) and a plurality of cutti... | 08/15/2006 |
| 6109374 | Roller stabilizer An improved stabilizing tool includes a body with a pocket, and a roller rotatably disposed in the pocket. The body includes a fluid passageway formed axially therethrough. The passageway has a first zone wherein the pressure of the fluid is relatively hi... | 08/29/2000 |
| 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 |
| 4700789 | Device to obtain ring-shaped cavities in the bottom of drilled holes made in any type of medium An apparatus for creating annular cavities in the bottom of drilled holes in any medium having a body, an axle within the body at one end and rotated by a conventional drill, a reamer secured to the axle at its other end, an inner part enveloping the axle... | 10/20/1987 |
| 4262759 | Combination seal and pressure relief valve for sealed drill string unit A drill string reamer-stabilizer includes a main body adapted to be connected as an element of a rotary drill string. Individual bearing shafts are mounted axially along the exterior of the main body supporting roller cutters that engage the wall of the b... | 04/21/1981 |
| 4254839 | Radial force anti-extrusion device for sealed drill string unit A drill string reamer-stabilizer includes a main body adapted to be connected as an element of a rotary drill string. Individual bearing shafts are mounted axially along the exterior of the main body to support roller cutters that engage the wall of the b... | 03/10/1981 |
| 4020910 | Sealing between relatively rotating members in boring apparatus A boring apparatus having a working member mounted for rotation on a lubricated bearing about a shaft member, the apparatus being of the type in which substantial radial and axial relative motion between said members occurs in response to radial and axial... | 05/03/1977 |
| 4013325 | Drill rod stabilizing tool A stabilizing tool comprising a substantially cylindrical body; said body having a plurality of substantially cylindrical chambers formed therein said chambers being located axially within the body and spaced symmetrically around the body with respect to ... | 03/22/1977 |
| 3982594 | Eccentric stabilizer A stabilizer for use in a blast hole drilling has a shaft connectable at each end to a drill string. A plurality of individual bushings are axially spaced along the shaft, and each bushing carries a roller reamer rotatable thereon. Each bushing has its in... | 09/28/1976 |
| 3977481 | Boring apparatus Boring apparatus having a plurality of hole-enlarging assemblies comprising shaft-mounted working members. In a convergent arrangement of the axes of the working members the assemblies are completed by insertion of the elongated shafts via a hollow space ... | 08/31/1976 |
| 3945447 | Boring apparatus In boring apparatus of the type having cutters mounted for rotation about respective cutter axes in a frame which is in turn rotatable about a frame axis, each cutter having a body carrying teeth which in operation sweep a surface which is oblique to the ... | 03/23/1976 |
