Matches 1 - 26 out of 26
Match Document Document Title
7401537 Cutter insert gum modification method and apparatus  
A method and apparatus for treating a cutter ring adapted to be used in tunnel boring operations; forming an initial cutter ring and heat treating the cutter ring prior to a laser client process;...
EP1739277A2 Graded hardfacing for drill bits  
A drill bit (10) including a bit body (19) having an upper end adapted to be detachably secured to a drill string and at least one leg (105) at its lower end, each leg having a downwardly and...
EP1068423B1 APPARATUS AND METHOD FOR MITIGATING WEAR IN DOWNHOLE TOOLS  
Abstract not available for EP1068423 Abstract of corresponding document: US6722559 Surfaces of a downhole tool, e.g. a drill bit, a reamer shoe or a stabilizer, are protected by at least...
6772849 Protective overlay coating for PDC drill bits  
In one embodiment, a method of increasing a durability of a drill bit having a bit body with at least one blade disposed thereon, at least one cutter pocket disposed on the blade, and at least one...
6722559 Apparatus and method for mitigating wear in downhole tools  
Surfaces of a downhole tool, e.g. a drill bit, a reamer shoe or a stabilizer, are protected by at least temporarily fixing a super-hard material ( 6 ) to the surfaces of the down-hole tool, and...
EP1318268A1 Protective Overlay Coating for PDC Drill Bits  
In one embodiment, a method of increasing a durability of a drill bit having a bit body with at least one blade disposed thereon, at least one cutter pocket disposed on the blade, and at least one...
6564884 Wear protection on a rock bit  
Using inserts which are welded in place allows the use of hardfacing in the immediate vicinity of the inserts. Areas of high wear, such as cutting structures and gage areas, can use a combination...
6547017 Rotary drill bit compensating for changes in hardness of geological formations  
A long lasting rotary drill bit for drilling a hole into variable hardness geological formations that has a self-actuating mechanism responsive to the hardness of the geological formation to...
6335506 Laser hardened steel cutting rule  
A hardened steel cutting rule obtained by the process of a first step of applying a first laser beam having a first intensity and focused to a first focal point to a selected surface area of a...
6218642 Laser hardened steel cutting rule  
The invention relates to surface hardening of steel workpieces using laser beams and more particularly to laser hardening steel cutting rules. The method comprises applying a first laser beam of a...
RE37127 Hardfacing composition for earth-boring bits  
A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered...
6170583 Inserts and compacts having coated or encrusted cubic boron nitride particles  
An insert is provided for a rock bit for drilling bore holes in the ground and other downhole tools. The cutting portion of the inserts consist of encrusted cubic boron nitride pellets, tungsten...
6138779 Hardfacing having coated ceramic particles or coated particles of other hard materials placed on a rotary cone cutter  
Hardfacing to protect wear surfaces of drill bits and other downhole tools having coated cubic boron nitride particles or coated particles of other ceramic, superabrasive or superhard materials...
6102140 Inserts and compacts having coated or encrusted diamond particles  
The improved insert for a ground engaging tool, with a plurality of sockets for receiving a respective insert comprises a body having first and second portions and first and second zones. The first...
5836409 Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys  
A monolithic long lasting rotary drill bit for drilling a hole into a geological formation having at least one hardened rod which has a length of at least three times its diameter composed of hard...
5755299 Hardfacing with coated diamond particles  
Hardfacing to protect wear surfaces of drill bits and other downhole tools having coated diamond particles dispersed within and bonded to a metallic matrix deposit. The coating on the diamond...
5755298 Hardfacing with coated diamond particles  
Hardfacing to protect wear surfaces of drill bits and other downhole tools having coated diamond particles dispersed within and bonded to a metallic matrix deposit. The coating on the diamond...
5663512 Hardfacing composition for earth-boring bits  
A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered...
5535838 High performance overlay for rock drilling bits  
A method to apply a high performance overlay to a metal substrate of a rock bit to render the substrate surfaces of the rock bit more resistant to erosion, corrosion and substrate cracking while...
5492186 Steel tooth bit with a bi-metallic gage hardfacing  
An earth boring bit rotatable cutter having a first hardfacing composition of carbide particles selected from the class of cast and macrocrystalline tungsten carbide dispersed in a steel matrix...
D357486 Insert for rocking drilling bits  
D357485 Insert for rock drilling bits  
5351771 Earth-boring bit having an improved hard-faced tooth structure  
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a plurality of teeth formed integrally thereon and arranged in circumferential rows....
5351769 Earth-boring bit having an improved hard-faced tooth structure  
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a plurality of teeth formed integrally thereon and arranged in circumferential rows....
5291807 Patterned hardfacing shapes on insert cutter cones  
A drill bit including at least one rolling cutter body with rows of relatively hard substantially outwardly projecting and circumferentially spaced cutting inserts projecting from the cutter body...
5084113 Method of producing a buildup valve for use in internal combustion engines  
A buildup valve comprising a valve body of a quench-hardenable, heat resistant steel having a valve face and a buildup layer formed on the valve face from a cobalt or nickel base superalloy having...
Matches 1 - 26 out of 26