Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8016054 | Polycrystalline diamond abrasive elements A polycrystalline diamond abrasive element, particularly a cutting element, comprises a table of polycrystalline diamond bonded to a substrate, particularly a cemented carbide substrate, along a non-planar interface. The polycrystalline diamond abrasive element is c... | 09/13/2011 |
| 7360608 | Rotary drill bits including at least one substantially helically extending feature and methods of operation A rotary drill bit is disclosed, including at least one cutting element affixed thereto and configured to form a distinct borehole surface in response to drilling a subterranean formation. At least one substantially helically extending feature associated with the at... | 04/22/2008 |
| 7302374 | Method of designing a drill bit, and bits made using said method A method for designing a drill bit that involves simulating a drill bit having cutting elements disposed thereon is provided. In particular, the method involves determining the axial forces acting on at least one of the cutting elements at a first orientation. ... | 11/27/2007 |
| 7287818 | Vertical milling apparatus for a paved surface A vertical milling apparatus for a paved surface has a rotary degradation element which has a top end connected to a carrier. The carrier is slideably attached to an underside of a motorized vehicle, and adapted to traverse the paved surface. The rotary degradation ... | 10/30/2007 |
| 7286959 | Drill bit performance analysis tool A method and system that can be used to automatically calculate and generate performance analysis charts, including a reliability curve is disclosed. The method and system may be used to selectively convert performance records data from a database into graphs and ch... | 10/23/2007 |
| 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 |
| 6932170 | Drilling head A drilling head (1) is disclosed, in particular for introduction into pipelines, with a rear connector piece (2) and a forward cutting body (3) of the size of the diameter, comprising cutting ribs (4), extending in the advancing direction... | 08/23/2005 |
| 6789635 | Drill bit for directional drilling in cobble formations A drill bit configured for use in horizontal directional boring includes a spoon-shaped body with a rearwardly angled or inclined arcuate front end face that widens from a leading edge to a trailing edge in a circumferential direction, the front face sloping rearwar... | 09/14/2004 |
| 6729420 | Multi profile performance enhancing centric bit and method of bit design A novel drill bit includes a cutting reamer portion that cuts to gage diameter, and a pilot portion that cuts to a radius about 50%-80% of the reamer portion. The pilot portion extends downward from the reamer portion to create a distinct cutting area including pilo... | 05/04/2004 |
| 6634444 | Drill bit for trenchless drilling A drill bit for trenchless drilling includes a bit body defining a longitudinal axis about which the drill bit is rotated during a trenchless drilling operation. Two sets of cutting teeth are mounted at a front end of the bit body, the sets disposed on op... | 10/21/2003 |
| 6615934 | PDC drill bit having cutting structure adapted to improve high speed drilling performance A drill bit is disclosed which includes a bit body having a plurality of blades thereon. The blades have a plurality of cutting elements affixed thereon at selected positions. The cutting elements are disposed into at least two groups. A first one of the ... | 09/09/2003 |
| 6585064 | Polycrystalline diamond partially depleted of catalyzing material The present invention provides an earth boring drill bit with a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elem... | 07/01/2003 |
| 6392190 | Automated hardfacing system An automated hardfacing system useful for hardfacing roller cones is disclosed. The automated system includes a robot with an arm, a positioner, and a controller which co-ordinates the alignment of the robot and the positioner. The robot holds a hardfacin... | 05/21/2002 |
| 6374916 | Method and apparatus for stiffening an output shaft on a cutting tool assembly The present invention generally provides a system and method for stiffening a cutting tool assembly used in cutting laterally relative to a wellbore axis to reduce stresses and cyclical bending of the cutting tool assembly during cutting. The system inclu... | 04/23/2002 |
| 6124564 | Hardfacing compositions and hardfacing coatings formed by pulsed plasma-transferred arc A new hardfacing composition is disclosed. In addition, a pulsed plasma transferred arc method for depositing hardfacing material with a higher content of carbide and lower dilution by a substrate metal is disclosed. The disclosed method produces a hardfa... | 09/26/2000 |
| 5839525 | Directional drill bit A roller cone or drag-type drill bit for use in drilling subsurface formations, especially useful for directional drilling, has a bit body with a shank portion for connection to a drill string, and a crown portion. Breaker slots are formed in the bit body... | 11/24/1998 |
| 5836407 | Articulated tool for drilling oil, gas geothermal wells The invention relates to a tool for drilling oil, gas or geothermic wells. The tool includes two main members, a hollow shaft (1) and a blind tool body (2) more elongate than conventional tool bodies; the two main members are spherically connected to each... | 11/17/1998 |
| 5404660 | Mechanism for supporting an earthworking etc. tool A mechanism (22) for supporting an earthworking tool from a vehicle such as a front end-loader (21) includes: (i) a primary support structure (23) adapted to be pivotally attached, in a readily releasable manner, about a generally upright, slewing axis (2... | 04/11/1995 |
| 4953640 | Quick detach bit A quick detach bit apparatus includes a wear sleeve having a chuck threaded thereinto. A bit is mounted within the chuck. The bit and chuck are interconnected by mating, axially extending splines and grooves. The chuck includes a resiliently mounted segme... | 09/04/1990 |
| 4854404 | Bucket auger A bucket auger for excavating holes for planting trees is disclosed which includes a trapezoidal cutting frame having teeth secured to the side and bottom. A central vertical shaft adapted to connect to a rotational drive mechanism is secured through uppe... | 08/08/1989 |
| 4496013 | Prevention of cone seal failures in rock bits There is provided a rock bit comprising a bit body having a dome and a plurality of legs, each with a journal pin. A cutter cone is mounted on each journal pin with a cone seal between the journal pin and cutter cone. A sacrificial anode is attached to th... | 01/29/1985 |
| 4406336 | Drilling bit The device described herein comprises a bit for drilling oil wells, water wells, foundation sockets for bridges and buildings, air and utility shafts for mines, etc., which bit comprises an inner core or mandrel and an outer shell or exterior sleeve, whic... | 09/27/1983 |
