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9022143 Wear indicators for drilling equipment  
Described herein is a wear indicator (100) for use in a drill bit or a core head. The wear indicator (100) comprises an elongate element that forms part of the drill bit. The elongate element has...
8899350 Method and apparatus for detection of drill bit wear  
A method for determining wear of a drill bit is disclosed. The method includes drilling a first hole in a worksite based on a hole pattern having a plurality of planned holes and determining an...
8863859 Method for determining the wear of a force-loaded linkage of an earth-working device  
The invention relates to a method for determining the wear of a force-loaded linkage of an earthwork device, wherein the instantaneous load on the linkage is measured during operation of the...
8775099 Method for determining the wear state  
This invention relates to a system for determining a wear state of a chisel, a chisel holder, and/or a chisel holder replacement system equipped with a chisel and chisel holder. A sensor is...
8757291 At-bit evaluation of formation parameters and drilling parameters  
An apparatus for forming a wellbore in a formation may include a bit body and a sensor in the bit body. The sensor may include at least one cutting element and may be configured to generate...
8757290 Method of monitoring wear of rock bit cutters  
A method of monitoring the wear of drill bits for drilling wells in earth formations, several embodiments of an improved drill bit for drilling a well in an earth formation, and methods of...
8718802 Well prog execution facilitation system and method  
A prog analysis and execution system and method. The system includes a computer control system, an interface engine in communication with the computer control system, the interface engine being...
8695729 PDC sensing element fabrication process and tool  
A Polycrystalline Diamond Compact (PDC) cutter for a rotary drill bit is provided with an integrated sensor and circuitry for making measurements of a property of a fluid in the borehole and/or an...
8640791 System and method for monitoring and controlling underground drilling  
A system and method for monitoring underground drilling in which vibration is monitored by creating a model of the drill string using finite element techniques or finite difference techniques and...
8534391 Cutting elements and earth-boring tools having grading features  
Earth-boring tools include one or more cutting elements having at least one grading feature positioned a known distance from an initial working surface of the cutting element. Methods of grading...
8386196 Method for determining the wear state  
This invention relates to a method for determining a wear state of a chisel, a chisel holder, and/or a chisel holder replacement system equipped with a chisel and chisel holder. For this method to...
8185366 Methods for modeling, displaying, designing, and optimizing fixed cutter bits  
In one aspect, the invention provides a method for modeling the performance of a fixed cutter bit drilling an earth formation. In one embodiment, the method includes selecting a drill bit and an...
8006781 Method of monitoring wear of rock bit cutters  
A method of monitoring the wear of drill bits for drilling wells in earth formations, several embodiments of an improved drill bit for drilling a well in an earth formation, and methods of...
7844405 Static and ultrasonic methods for measuring compressibility and density of small particles  
A method of measuring the compressibility, and/or the density, of small particles, and especially nano-particles, in suspension is described. The static method uses steady pressures and measures...
7770664 Wear indicators for expandable earth boring apparatus  
An expandable underreamer apparatus disposed on a distal end of a drillstring and configured to drill a formation includes a substantially tubular main body adjacent a cutting head, the main body...
7726415 Fixed cutter drill bit  
The fixed cutter drill bit disclosed utilizes a unique piloting section and reaming section carefully designed to impart several specific operational advantages. In the piloting section, cutting...
7693695 Methods for modeling, displaying, designing, and optimizing fixed cutter bits  
In one aspect, the invention provides a method for modeling the performance of a fixed cutter bit drilling an earth formation. In one embodiment, the method includes selecting a drill bit and an...
7624810 Ball dropping assembly and technique for use in a well  
A technique that is usable with a well includes running string that includes a tool and a flowable object that is held in a retained position within the string downhole in the well. After the...
7565928 Downhole abrading tool having a taggant injection assembly for indicating excessive wear  
A downhole abrading tools has a body with a first end for connection with a rotating component of a drill string and a cutting end for rotation in unison with the body. The downhole abrading tool...
7484571 Downhole abrading tools having excessive wear indicator  
A downhole abrading tool having a body with a first end for connection to a drill string, a cutting end, a drilling fluid passageway, a restrictor disposed within drilling fluid passageway, and an...
7424910 Downhole abrading tools having a hydrostatic chamber and uses therefor  
A downhole abrading tool has a body with a first end for connection to a drill string, a cutting end, an exterior surface, a drilling fluid passageway, a valve, and a chamber. Upon exposure of the...
7404456 Apparatus and method of identifying rock properties while drilling  
Acoustic signals generated by drilling a bore hole with a drill bit are received at sensors placed in the drill string. The acoustic signals received by the sensors are processed, e.g. using a...
7404457 Downhole abrading tools having fusible material and methods of detecting tool wear  
A downhole abrading tool has a body with a first end for connection to a drill string, a cutting end, a drilling fluid passageway, and a fusible material disposed within the body. The fusible...
7357197 Method and apparatus for monitoring the condition of a downhole drill bit, and communicating the condition to the surface  
A method and apparatus for signalling the surface operator about downhole conditions. Sensors located downhole collect data while drilling and the data is processed to determine bit failure, for...
7356450 Methods for designing roller cone bits by tensile and compressive stresses  
A method for designing a roller cone bit that includes steps of selecting design parameters for the roller cone bit, drilling parameters, and parameters of an earth formation, simulating drilling...
7318488 Method for classifying data measured during drilling operations  
A method for classifying data measured during drilling operations at a wellbore includes determining a first difference between values of a selected measured parameter between a first time and a...
7316278 Method for determining drilling malfunction by correlation of drilling operating parameters and drilling response parameters  
A method for determining a drilling malfunction includes determining a correspondence between at least one drilling operating parameter and at least one drilling response parameter. Determining...
7261167 Method and system for predicting performance of a drilling system for a given formation  
A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation is disclosed. The method generates a geology model of a given...
7258175 Method and apparatus and program storage device adapted for automatic drill bit selection based on earth properties and wellbore geometry  
A bit selection method will generate and record or display a sequence of drill bits chosen from among a plurality of bit candidates adapted for drilling an Earth formation in response to input...
7140452 Method and apparatus for determining drill string movement mode  
A method for determining movement mode in a drill string includes measuring lateral acceleration of the drill string, determining lateral position of the drill string from the acceleration...
7100708 Autodriller bit protection system and method  
A controller provides an automatic bit protection sequence for an autodriller that can be initiated during the initial stage of set down of the bit within the formation. The automatic protection...
6986395 Force-balanced roller-cone bits, systems, drilling methods, and design methods  
Roller cone drilling wherein the bit optimization process equalizes the downforce (axial force) for the cones (as nearly as possible, subject to other design constraints).
6968909 Realtime control of a drilling system using the output from combination of an earth model and a drilling process model  
A system is for controlling borehole operations using a computational drilling process model representing the combined effect of downhole conditions and the operation of a drillstring. The...
6856949 Wear compensated roller cone drill bits  
A method for designing a drill bit that has at least one roller cone and a plurality of cutting elements, including selecting initial bit design parameters. Drilling simulations are then used to...
6817425 Mean strain ratio analysis method and system for detecting drill bit failure and signaling surface operator  
An apparatus and method for monitoring and reporting downhole bit failure. Sensors are located on a sub assembly (which is separate from the drill bit itself but located above it on the drill...
6814162 One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices  
A drill bit, comprising a bit body, a sensor disposed in the bit body, a single journal removably mounted to the bit body, and a roller cone rotatably mounted to the single journal.
6725947 Roller bits with bearing failure indication, and related methods, systems, and methods of manufacturing  
A rotary drill bit includes a bit body that includes a plurality of upright legs that terminate in an exterior bearing surface. At least one roller cutter is affixed to a corresponding exterior...
6722450 Adaptive filter prediction method and system for detecting drill bit failure and signaling surface operator  
An apparatus and method for monitoring and reporting downhole bit failure. Sensors are located on a sub assembly (which is removable from the drill bit) and send data to neural net or other...
6648082 Differential sensor measurement method and apparatus to detect a drill bit failure and signal surface operator  
An apparatus and accompanying method for monitoring and reporting downhole bit failure. Individual sensors are placed on a sub which is separate from the drill bit itself, and are powered by a...
6634441 System and method for detecting roller bit bearing wear through cessation of roller element rotation  
A system and method for detecting the wear of a roller bit bearing on a roller drill bit body where the roller element has a plurality of cutting elements and is rotatably attached to the roller...
6631772 Roller bit rearing wear detection system and method  
A system and method for detecting the wear of a roller bit bearing between a roller drill bit body and a roller bit rotatably attached to the roller drill bit body. A valve-plug is placed between...
6619411 Design of wear compensated roller cone drill bits  
The invention is a drill bit that has a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on...
6510906 Impregnated bit with PDC cutters in cone area  
A drill bit employing a plurality of discrete, post-like diamond grit impregnated cutting structures extending upwardly from abrasive particulate-impregnated blades defining a plurality of fluid...
6484824 Failure indicator for rolling cutter drill bit  
A bearing failure indicator for sealed and lubricated rolling cutter earth boring drill bits is disclosed. A plurality of cutting inserts, arranged in a plurality of rows, are secured in the...
6386297 Method and apparatus for determining potential abrasivity in a wellbore  
A method is provided for generating an indicator of potential bit abrasion in a particular wellbore. Forensic wellbore data is obtained from at least one previously drilled wellbore which is...
6205851 Method for determining drill collar whirl in a bottom hole assembly and method for determining borehole size  
A method for determining the existence of a whirling condition during drilling of a borehole provides real time determination of destructive conditions of a bottom hole assembly during drilling....
6167833 Wear indicator for rotary drilling tools  
A wear indicator is provided for a rotary drilling tool of the type which comprises a bit body having a leading surface for cutting, abrading or reaming a hole in a target substrate material such...
6068394 Method and apparatus for providing dynamic data during drilling  
The present disclosure is directed to both a method and apparatus for providing data dynamically during the drilling of a borehole. This invention can be used with drilling apparatus which is...
5864058 Detecting and reducing bit whirl  
A downhole sensor sub is provided in the lower end of a drillstring, such sub having three orthogonally positioned accelerometers for measuring vibration of a drilling component such as the drill...
5794720 Method of assaying downhole occurrences and conditions  
A method of assaying work of an earth boring bit of a given size and design comprises the steps of drilling a hole with the bit from an initial point to a terminal point and recording the distance...

Matches 1 - 50 out of 97 1 2 >