Patent application number | Description | Published |
20080257610 | Elastomer Material for High Temperature Roller Cone Bits - An earth boring bit has a bit body with at least one bearing pin. A cone is rotatably mounted on the bearing pin. A seal assembly is located between the cone and the bearing pin, the seal assembly having at least one flexible seal member. A flexible pressure compensating diaphragm is mounted in the body. The diaphragm has one side adapted to be exposed to borehole fluids and another side in contact with lubricant contained in bearing spaces between the cone and the bearing pin. The flexible seal member and the diaphragm are formed of a fluorinated elastomer. The elastomer is either a perfluoroelastomer (FFKM) or a fluoroelastomer (FKM). | 10-23-2008 |
20090127002 | ROLLER CONE BIT BEARING WITH ELASTOMERIC SEAL HAVING SELF BREAK-IN PROPERTY - A roller cone bit having an elastomeric seal with a self break-in property is disclosed. The elastomeric seal includes abrasive material on a sliding surface for facilitating break-in. Examples of abrasive materials include ground rock, hard metals, tungsten, tungsten carbide, tantalum, tantalum carbide, titanium carbide, titanium nitride, and minerals, diamonds and nanomaterial enhanced diamond. | 05-21-2009 |
20090194339 | EARTH BORING BIT WITH WEAR RESISTANT BEARING AND SEAL - A roller cone bit is provided that includes a wear resistant coating applied to a bearing shaft, which is attached to a roller cone. The wear resistant coating can be a tungsten/tungsten carbide composite applied by chemical vapor deposition. | 08-06-2009 |
20090205873 | DOWNHOLE TOOL BEARING SYSTEM CONTAINING DIAMOND ENHANCED MATERIALS - Downhole tool bearings are provided with diamond enhanced materials. The diamond enhanced materials comprise diamond grains in a matrix of tungsten or silicon carbide. A brazed diamond grit or diamond particles coated with a reactive braze may be utilized for bearing applications. Bearing rings formed at least in part with diamond enhanced material are installed on at least one of the bearing pin journal, the nose and the cone cavity. The bearing rings may be continuous rings or partial rings and attached to the journal pin or cone cavity. These may include thrust bearings, rollers, roller race, balls and ball races made of diamond enhanced material. These bearing surfaces also are formed at least in part with diamond enhanced material and attached to portions of the journal or cone bearing surfaces. | 08-20-2009 |
20090260888 | Fiber Reinforced Pressure Compensator Diaphragm - A drill bit for drilling a wellbore, the drill bit having a body and at least one bearing. A rotary cone is rotatably attached to the bit body at the bearing. A lubricant reservoir is located in an inner portion of the bit body and is in fluid communication with the bearing. A communication port leads from the inner portion of the bit body to the exterior of the bit body. A fiber reinforced elastomeric pressure compensator diaphragm separates lubricant in the lubricant reservoir from the communication port. | 10-22-2009 |
20090283332 | CONFORMAL BEARING FOR ROCK DRILL BIT - A rock drilling bit having PDC radial bearings has journal and cone bearing surfaces with increased contact area to increase load support. The radius of curvature of the bearing pin journal and cone bearing surfaces are matched or conformed on the bearing pressure side. The conformal journal surfaces may be formed on the main journal bearing, the pilot pin radial bearing, or both surfaces. In addition, diamond inlays may be located on the bearing surfaces of the cone, the bearing pin, or both components. | 11-19-2009 |
20100089657 | SPACER RING FOR ELASTOMERIC SEAL - A roller cone bit is provided that includes a companion ring positioned adjacent to the seal, wherein the companion ring is formed of a porous material that is compatible with the fluid lubricating the interface between the roller cone and the bearing pin. | 04-15-2010 |
20100163313 | Engineered Bearing Surface For Rock Drilling Bit - A drill bit bearing having a treated surface and method for preparing the same is provided. The method includes the steps of polishing at least one contacting surface of the bearing with an abrasive paste to a finish of less than about 10 μin Ra. The surface of the polishing instrument has a coating that includes a mixture of an epoxy cement and a polymer. | 07-01-2010 |
20100329081 | METHOD FOR NON-DESTRUCTIVELY EVALUATING ROTARY EARTH BORING DRILL COMPONENTS AND DETERMINING FITNESS-FOR-USE OF THE SAME - A method of non-destructively identifying and characterizing defects in a rotary drill component is provided. The method includes providing a drill component and an ultrasonic test system including a phased array ultrasonic transducer (PAUT). The method also includes acoustically coupling the PAUT to a surface location, transmitting focused ultrasonic acoustic waves at the location into the PAUT and recording a reflected acoustic response corresponding to a portion of a predetermined volume of a microstructure of the component associated with the location on the surface. The method also includes storing the response and moving one of the transducer or the component to a plurality of unique locations representative of the predetermined microstructure and repeating these steps. The method also includes processing the responses and providing an output signal to an output device configured to provide an output indicative of differences in the output signal within the predetermined volume of the microstructure. | 12-30-2010 |
20110024198 | BEARING SYSTEMS CONTAINING DIAMOND ENHANCED MATERIALS AND DOWNHOLE APPLICATIONS FOR SAME - Downhole tool bearings are provided with diamond enhanced materials. The diamond enhanced materials comprise diamond grains in a matrix of tungsten or silicon carbide or a silicon bonded diamond material. A brazed diamond grit or diamond particles coated with a reactive braze may be utilized for bearing applications. Bearing rings for use in downhole tools may be formed at least in part with the diamond enhanced material. In one embodiment, the bearing rings may be used in a positive displacement motor. In additional embodiments, the bearing rings may be used in a submersible pump. | 02-03-2011 |
20110048810 | SYNERGIC SURFACE MODIFICATION FOR BEARING SEAL - The present invention relates to a method and apparatus for forming a dynamic seal between two surfaces. More specifically, the invention relates to creating a textured surface with a thin, hard coating on a metallic annular sealing ring such as the sealing ring used in an earth boring drill bit. | 03-03-2011 |
20110061940 | CONFORMAL BEARING FOR ROCK DRILL BIT - A rock drilling bit having PDC radial bearings has journal and cone bearing surfaces with increased contact area to increase load support. The radius of curvature of the bearing pin journal and cone bearing surfaces are matched or conformed on the bearing pressure side. The conformal journal surfaces may be formed on the main journal bearing, the pilot pin radial bearing, or both surfaces. In addition, diamond inlays may be located on the bearing surfaces of the cone, the bearing pin, or both components. | 03-17-2011 |
20120080230 | BEARINGS FOR DOWNHOLE TOOLS, DOWNHOLE TOOLS INCORPORATING SUCH BEARINGS, AND METHODS OF COOLING SUCH BEARINGS - Bearings for downhole tools including a first bearing member and a second bearing member, at least one of the first and second bearing members having a channel formed therein. Methods of cooling bearings of downhole tools comprise flowing a fluid within a channel formed in at least one bearing member. Heat is transferred from at least the at least one bearing member to the fluid. The fluid is flowed away from the at least one bearing member. | 04-05-2012 |
20120273282 | DOWNHOLE TOOLS HAVING MECHANICAL JOINTS WITH ENHANCED SURFACES, AND RELATED METHODS - A downhole tool may comprise a mechanical joint, and a diamond-like coating over at least a portion of a surface of at least one component of the mechanical joint, the diamond-like coating having a thickness greater than 10 micrometers. Methods of manufacturing a mechanical joint of a downhole tool may comprise disposing a diamond-like coating on at least a portion of a surface of a component of the mechanical joint of the downhole tool to a thickness of at least 10 microns and at a temperature less than about 200° C. | 11-01-2012 |