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| Number | Title | Issue Date |
| 4793422 | Articulated elevator links for top drive drill rig An apparatus for a top drive drill rig lifts a stand of the drill pipe into engagement with the drive stem in the derrick. The apparatus includes a set of elevators mounted between the drive head by a link assembly. The link assembly includes two link sec... | 12/27/1988 |
| 4791997 | Pipe handling apparatus and method A pipe handling apparatus for a drilling rig is mounted on the rig floor. The drilling rig has a top drive with a power drive stem. Elevators are suspended below the drive stem. The lifting member has a supporting arm to receive the bottom of a stand of d... | 12/20/1988 |
| 4788467 | Downhole oil well vibrating system A transducer assembly includes a piezoelectric transducer and a support member encasing the transducer. The transducer and the support member may have commonly disposed openings. The support member has a progressively increasing thickness at progressive p... | 11/29/1988 |
| 4787464 | Variable rake mine tool insert and method of use A mine tool roof bit insert having a leading face inclined at a constant angle of 0°-3° with respect to the axis of rotation, and a frontal face with a variable relief angle decreasing with increasing radial distance from the axis from 25°-55° at the ... | 11/29/1988 |
| 4776409 | Insitu waste impoundment treating apparatus and method of using same An apparatus (U) is shown in FIGS. 11-13 that includes a power operated vehicle (V) that supports a vertically movable frame (W) that has a confined space defining shroud (X) on the lower end thereof that may be placed in sealing contact with the upper su... | 10/11/1988 |
| 4770256 | Soil drilling Soil drilling tools are provided with at least two sidewardly movable plate members adapted to exert pressure on the wall of a bore hole to prevent a cave in.... | 09/13/1988 |
| 4751971 | Automatic augering device and method A mobile automatic augering device, capable of augering a hole, entrapping a volume of earth removed from the hole to create a work space above the hole, and then backfilling the hole with the removed earth is disclosed. The present invention is character... | 06/21/1988 |
| 4750571 | Screen placement method and apparatus A screen placement apparatus and system wherein the apparatus includes a motor for providing rotational torque to an auger received within a ground screen and a disposable cutting tip having a cutting diameter equal to or greater than the outer diameter o... | 06/14/1988 |
| 4696352 | Insert for a drilling tool bit and a method of drilling therewith A coated insert for such drilling tool bits as mine tool roof bits or masonry drill bits. A hard, fracture resistant substrate is coated with one or more thin adherent layers of refractory coating material. The material of each layer is a carbide, nitride... | 09/29/1987 |
| 4658915 | Easy break-out tool joint and method An easy break-out tool joint (10) (two embodiments) comprising a drive spindle (stem), or sub (12, 12a) having a shoulder ring (32, 32a) whose shoulder (34) is axially movable but rotatable with the sub (12, 12a) to form a conventionally shouldered (34, 5... | 04/21/1987 |
| 4646853 | Shaft boring machine and method A shaft boring machine including a rotatable cutterwheel assembly with a horizontal axis mounted on a carriage having vertical travel. The carriage is mounted on a slewing base frame and rotates about the vertical axis of the machine. An excavating unit f... | 03/03/1987 |
| 4630690 | Spiralling tapered slip-on drill string stabilizer The present invention includes a tubular body member with a central bore which has two spiralling or threaded interior surfaces, each interior surface having a leading edge at nearly right angles to the longitudinal axis of the body and a sloped or tapere... | 12/23/1986 |
| 4629010 | Process and device for sinking wells A device and process for sinking vertical wells. A pair of rotary digging heads have horizontal axes mounted on supports for movement of such axes towards and away from each other between a central position close to the axis of a well and a peripheral pos... | 12/16/1986 |
| 4625814 | Percussive drill rod system Method and apparatus for Percussive drilling, in which a drill rod is selected with dimensions such that cross-sectional areas of an inner channel within the rod for flushing medium, and of an outer channel formed between the rod and material being drille... | 12/02/1986 |
| 4610314 | Truck mounted drilling machine A drilling machine comprises a rotary motor mounted to an assemblage of rigid bar linkages. Means are provided for moving the linkages relative to each other. The linkages are connected together in a configuration which ensures that as the linkages move r... | 09/09/1986 |
| 4604818 | Under reaming pile bore excavating bucket and method of its excavation An under reaming pile bore excavating bucket by which an under reamed part of a pile bore is excavated and the excavated soil is moved into the bucket for easy removal of the soil. In use, the bucket is lowered to the bottom of an already excavated straig... | 08/12/1986 |
| 4580642 | Zero deviation drill bits Method and apparatus for drilling a straight borehole in all types of geological formations by the provision of a drilling tool that maintains a constant hole angle respective to the vertical as the borehole is formed. The apparatus includes a bit to whic... | 04/08/1986 |
| 4558748 | Method and equipment for boring and casing air vent holes and/or delivery holes in medium-steep and steep dip coal deposits and rocks of loose structure Forming a hole between lower and upper parallel galleries formed in a mine by boring upwardly from the lower gallery a bore hole having a first length equal to a fraction of the distance between the lower and upper galleries, then casing the bore hole by ... | 12/17/1985 |
| 4544041 | Well casing inserting and well bore drilling method and means A well bore casing inserting and drilling method and apparatus comprising the simultaneous drilling and casing setting of an oil and/or gas well bore by supporting a drill bit and actuating motor therefor from the lower end of the well casing whereby the ... | 10/01/1985 |
| 4540200 | Rock drill A drilling assembly for use in percussion drilling comprising a drill bit and a drill rod having cooperating conical surfaces, one of said surfaces being provided with a helically extending thread. For purposes of ensuring a reliable connection the thread... | 09/10/1985 |
| 4531591 | Drilling head method and apparatus A rotary drilling head wherein rotary friction between the rotary spindle assembly and the spindle housing is limited by improvements in bearing and seal lubrication and by seal structure such that the gripping action of a resiliently flexible packer on a... | 07/30/1985 |
| 4530410 | Hole boring apparatus and method A hole boring apparatus includes an upright frame 20 along which can be moved a carriage 20 carrying a hydraulic motor 29 driving a square-section socket 29 in rotation. The top end of a train of square-section bars 40 is engaged in the socket, and an aug... | 07/23/1985 |
| 4527638 | Mine tool roof bit insert and a method of drilling therewith A mine tool roof bit insert geometry of a 30° top relief angle between the top cutting edge and the top trailing edge and a radius of curvature of 1/16 inch at the corners improves the maximum wear and penetration rate when drilling into sandstone and a ... | 07/09/1985 |
| 4515226 | Tooth design to avoid shearing stresses Teeth disposed on the bit face of a rotating bit are, angularly oriented on the sloping surface of the bit face such that a vertical loading force which is applied to each tooth vectorially sums with a wedging force exerted by the rock formation on each t... | 05/07/1985 |
| 4511006 | Drill bit and method of use thereof The cutting edge of a bit of a rotary drill comprises an agglomerate of natural or synthetic diamond mounted at the free end of a shank freely rotatable in a socket in the body. Preferably the agglomerate and the free end of the shank are cold swaged toge... | 04/16/1985 |
| 4509605 | Wireline protector with improved clamping mechanism A wireline protector for protecting an electrical wireline used in a downhole drilling operation. During the operation of adding additional drill string members to the drill string, the electrical wireline is encased by and clamped within the wireline pro... | 04/09/1985 |
| 4493379 | Cable reaming apparatus and method The technique for replacing an existing underground cable and a specific apparatus for doing so are disclosed herein. The apparatus includes a main body or cable follower which is interconnected with the cable to be replaced for slidable movement along th... | 01/15/1985 |
| 4488606 | Method of excavating an under-reamed pile bore An under-reaming pile bore excavator by which a straight pile bore is first excavated vertically to a given depth by rotating the main drill bits and the under-reamed bore is next excavated downward and outward into a given shape by rotating the slidable ... | 12/18/1984 |
| 4449592 | Automatic drill string section changer A mobile rock drill unit (10) is disclosed which automatically adds and removes drill string sections (26) from the drill string (24) of the drill unit. The drill unit includes a conventional drill motor (20) and a centralizer (40). A cylindrical storage ... | 05/22/1984 |
| 4431067 | Wireline protector with clamping mechanism A wireline protector for protecting an electrical wireline used in a downhole drilling operation. During the operation of adding additional drill string members to the drill string, the electrical wireline is encased by and clamped within the wireline pro... | 02/14/1984 |
| 4399876 | Reversing mechanism for the direction of rotation in a drilling apparatus A mechanism for reversing the direction of rotation in a drilling apparatus comprising a feeding beam (1) and a drilling machine (3) supported by the beam for longitudinal movement back and forth along the beam in a drilling direction (A) and an opposite ... | 08/23/1983 |
| 4396072 | Method and apparatus for producing a drill hole Producing a vertical or inclined drill hole by full profile drilling taking place upwardly from a starting location and utilizing a rotatable and displaceable drilling tool and a train of drilling rods which lead to the drilling tool, wherein the drilling... | 08/02/1983 |
| 4384626 | Clamp-on stabilizer A clamp-on stabilizer fixes the lateral position of a drill string in a borehole. The stabilizer includes a gripping sleeve with slotted and tapered ends, a stabilizer body receiving the sleeve, and a tubular locknut threaded into the body. The lower end ... | 05/24/1983 |
| 4371046 | Apparatus for and method of drilling a hole into the ground A drilling rig carried by a vehicle includes a mast having upper and lower sections. The lower section is mounted on a support surface of the vehicle which is maintained parallel to the ground surface during drilling. The upper section is secured to the l... | 02/01/1983 |
| 4339006 | Method and apparatus for mine roof drilling A method and apparatus for drilling bolt holes in a mine roof is described. The drill head of a roof bolting drill is provided with a deep chuck adapted to receive the lower male end of a conventional drill steel driver. In a drilling operation, a drill b... | 07/13/1982 |
| 4323128 | Spring adjustment system for drill string tool A torque transmitting drill string tool is provided that includes an outer member and an inner member telescopically arranged. Spline means between said outer member and said inner member transmits torque. A spring means is positioned between the outer me... | 04/06/1982 |
| 4317491 | Wireline protector A wireline protector for protecting an electrical wireline used in a downhole drilling operation. During the operation of adding additional drill string members to the drill string, the electrical wireline is encased by the wireline protector thereby guar... | 03/02/1982 |
| 4289631 | Compositions and process for extension of the useful life of machine elements Compositions, and the process of their use, for extending the useful life of machine elements wherein two metal bearing surfaces are in contact one with the other, or with a working surface, e.g., drill bits, gear faces, bearings, sleeves, bushings, ball-... | 09/15/1981 |
| 4284306 | Apparatus and method of mining subterranean rubble piles Disclosed is a method of solution mining the mineral content of a subterranean cavity containing a rubble pile positioned on the floor thereof and the subterranean cavity communicating with the surface by at least two boreholes, by drilling a liner throug... | 08/18/1981 |
| 4281722 | Retractable bit system A retractable bit system that includes a single piece annular core bit that is movable through a drill string (drill stem), had an outer diameter about the same as that of the drill stem, and can be releasably locked to the drill string, an outer barrel a... | 08/04/1981 |
