| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 175039000 | WITH BIT WEAR SIGNAL GENERATING | 15 |
| 20080230271 | Downhole abrading tools having fusible material and uses therefor - 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 material is capable of igniting and combusting in response to a selected temperature increase due to excessive wear on the cutting end. Combustion of the fusible material provides an indication to an operator of the downhole abrading tool of the excessive wear on the cutting end of the downhole abrading tool so that the downhole abrading tool can be removed from the well and replaced. The indication to the operator of the downhole abrading tool can be a temperature change or a pressure change in a drilling fluid flowing through the drilling fluid passageway. | 09-25-2008 |
| 20090126995 | Downhole abrading tool having taggants 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 cutting end having an abrading matrix containing an abrasive material for rotating engagement with an object within the well. The downhole abrading tool also includes a passage through the tool for circulating a drilling fluid. The abrading matrix includes at least one taggant embedded within the abrading matrix capable of being released by the abrading matrix into the downhole location due to wear on the abrasive material and transported to the surface location along with the drilling fluid for detection. When the taggant is released due to excessive wear, the taggant is carried from the downhole location in the well to the surface of the well where it can be detected by the operator of the tool. | 05-21-2009 |
| 20090294173 | 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 providing at least one axial recess configured to receive an arm assembly, and the arm assembly configured to translate between a retracted position and an extended position. The apparatus further includes a plurality of cutting elements disposed on the arm assembly, and a plurality of wear indicators imbedded in at least one arm assembly and positioned behind the cutting elements with respect to a direction of rotation of the arm assembly, wherein the wear indicators are configured to provide an increased torque to the drillstring upon contacting the formation. | 12-03-2009 |
| 20100139975 | 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 manufacture. In one embodiment, the bit is assembled by forming the bit, including a bit body and a plurality of cutting components; introducing a wear detector into the bit; and providing a module to monitor the wear detector and generate an indication of bit wear. The wear detector may be a witness material that may change a characteristic of at least a portion of the bit. The module may detect when the witness material is separated from the bit. The wear detector may be introduced during or after formation of the bit. The bit wear may be displayed for an operator. | 06-10-2010 |
| 20100212961 | METHODS AND APPARATUSES FOR ESTIMATING DRILL BIT CONDITION - A drill bit for drilling subterranean formations includes a bit body bearing at least one gage pad and a shank extending from the bit body. An annular chamber is formed within the shank. A data evaluation module is disposed in the annular chamber and includes a processor, a memory, and a communication port. The data evaluation module estimates a gage pad wear by periodically sampling a tangential accelerometer and a radial accelerometer disposed in the drill bit. A history of the tangential acceleration and the radial acceleration is analyzed to determine a revolution rate, gage-slipping periods, and gage-cutting periods. A change in a gage-pad-wear state is estimated responsive to an analysis of the revolution rate, the at least one gage-cutting period and the at least one gage-slipping period. The determination of the gage-pad-wear state may also include analyzing a formation hardness. | 08-26-2010 |
| 20110266054 | 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 information relating to a parameter of interest when the drill bit engages a wellbore surface. | 11-03-2011 |
| 20110290560 | EARLY WEAR DETECTION - A drill bit with a bit body having a central bore in communication with a plurality of nozzles for directing drilling fluid; a plurality of cutters defining a cutting face of the bit; and a passageway extending from the central bore toward the cutting face, such that excessive wear of the cutting face opens the passageway to allow the drilling fluid to flow therethrough, thereby reducing a surface pressure of the drilling fluid and indicating excessive wear of the bit. The passageway may extend to adjacent, or within one half inch or three inches of, the cutting face, such that excessive wear opens the passageway to the cutting face. In some cases, the passageway may actually extend through the cutting face with a plug inserted into the passageway at the cutting face to prevent the drilling fluid from exiting the passageway absent wear of the bit. | 12-01-2011 |
| 20120152617 | Real Time Bit Monitoring - A bit is assembled by forming the bit, including a bit body and a plurality of cutting components; embedding at least one electrical circuit into the bit, the circuit including a temperature sensor; and providing a module to monitor the circuits and generate an indication of bit wear. The electrical circuit may experience a change in resistance or conductivity due to wear of the bit and/or changes in an earth formation adjacent the bit. The bit wear and/or formation changes may be displayed for an operator. | 06-21-2012 |
| 20120152618 | 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 energy required to drill the first hole. The method also includes drilling a second hole in the worksite and determining an energy required to drill the second hole. The method further includes determining a wear of the drill bit using the determined energy required to drill the first hole and the determined energy required to drill the second hole. | 06-21-2012 |
| 20130008717 | SOLID STATE WEAR TRACERS FOR DRILL BITS - A method and apparatus for providing a reliable signal to the operator while drilling when a bit or tool becomes worn or damaged to a predetermined extent. The approach, in an exemplary embodiment, is to integrate one or more wear tracer elements into one or more parts of a drill bit or downhole tool that do not engage the earthen formation until the predetermined wear or damage occurs. At that time wear tracer elements are released upon wearing of the bit body, cutters, inserts, nozzles, or other components that include the wear tracer elements and enter the drill fluid. The presence of wear tracer elements in drilling fluid can be detected at the surface directly, or indirectly as a result of, for example, one or more reactions between the wear tracer elements and the mud, formation, or other subterranean elements, which yield some compound that may then be reliably detected. | 01-10-2013 |
| 20130256032 | Identification Emitters for Determining Mill Life of a Downhole Tool and Methods of Using Same - Downhole abrading tools have one or more identification tags disposed in or on the cutting end of the tools, and a housing having a detector and a relay module. The identification tags emit one or more signals that are detected by the detector which is disposed in close proximity to the cutting end. The relay module is operatively associated with the detector. During operation of the tool, the cutting end is worn causing release or destruction of one or more identification tags. The release or destruction of one or more identification tags causes a change in the signal or signals being detected by the detector. The signal change(s) is/are communicated through the relay module to the operator so that the operator can identify in real-time the amount of wear of the cutting end and, in some embodiments, the location of the wear of the cutting end. | 10-03-2013 |
| 20140102791 | Wear Indicators for Drilling Equipment - Described herein is a wear indicator ( | 04-17-2014 |
| 20140326506 | CUTTING ELEMENTS COMPRISING SENSORS, EARTH-BORING TOOLS COMPRISING SUCH CUTTING ELEMENTS, AND METHODS OF FORMING WELLBORES WITH SUCH TOOLS - An earth-boring tool includes a cutting element comprising a hard material and at least one of a signal generator configured to provide an electromagnetic or acoustic signal to an interface between a surface of the hard material and a surface of a subterranean formation, and a sensor configured to receive an electromagnetic or acoustic signal from the interface. A method of forming a wellbore includes rotating the earth-boring tool within a wellbore and cutting formation material with a cutting element, transmitting a signal through the cutting element to an interface between the cutting element and the formation material, and measuring a response received at a sensor. A cutting element includes a transmitter oriented and configured to dispense a signal to an interface between the cutting surface and a surface of a formation and a sensor oriented and configured to measure a signal from the interface. | 11-06-2014 |
| 20160097241 | CUTTER TOOL INSERT HAVING SENSING DEVICE - A cutting element for an earth-boring drilling tool and its method of making are provided. The cutting element may include a substrate, a superhard layer, and a sensing element. The superhard layer may be bonded to the substrate along an interface. The superhard layer may have a working surface opposite the interface and an outer peripheral surface. The outer peripheral surface may extend between the working surface and the interface. The sensing element may comprise at least a part of the superhard layer. | 04-07-2016 |
| 20160153244 | INSTRUMENTED ROTARY TOOLS WITH ATTACHED CUTTERS | 06-02-2016 |
