System and method for measuring temperature using an opto-analytical device

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting a temperature associated with drilling the wellbore based on the received electromagnetic radiation.

HIGH PRESSURE JETS FOR LEACHING CATALYSTS FROM A POLYCRYSTALLINE DIAMOND COMPACT

Apparatuses and methods for leaching catalysts from a polycrystalline diamond compact (PDC) may utilize a high pressure jet. For example, a method may include impinging a jet of leaching fluid, including one or both of an acid and a caustic material, on a surface of a PDC disposed on a substrate at a fluid pressure ranging between 125 psi and 10,000. 1. A method comprising:impinging a jet of leaching fluid, including one or both of an acid and a caustic material, on a surface of a polycrystalline diamond compact (PDC) disposed on a substrate at a fluid pressure between 125 psi and 10,000 psi.2. The method of claim 1 , further comprising:impinging the jet on the surface of the PDC at a speed of 150 ft/s or greater.3. The method of further comprising:impinging the jet on the surface of the PDC at an angle of between 30° and 80° relative to the surface of the PDC.4. The method of further comprising:providing the leaching fluid with a viscosity of between 0.5 cP and 20 cP.5. The method of further comprising:providing the leaching fluid at a temperature of between room temperature and a boiling point of the leaching fluid.6. The method of further comprising:introducing cavitation into the jet.7. The method of further comprising:submerging the surface of the PDC in a fluid.8. The method of further comprising:providing the fluid in which the PDC is submerged includes the leaching fluid.9. The method of further comprising:cycling the fluid through a fluid handling system of a jet system that produces the jet.10. The method of further comprising:generating the jet with a nozzle having a nozzle tip; andsubmerging the surface of the PDC and the nozzle tip in a fluid.11. The method of further comprising:generating the jet with a nozzle having a nozzle tip and jet orifice that has a nozzle orifice diameter and is defined in the nozzle tip; andarranging the nozzle tip within twenty nozzle orifice diameters of the surface of the PDC.12. The method of further comprising:providing ...

CHEMICAL AGENTS FOR RECOVERY OF LEACHED MATERIALS

The disclosure provides to a PDC element protective system including a mask configured to protect a non-leached portion of a leached polycrystalline diamond compact (PDC) element during a leaching process. The mask may be formed from or coated with polytetrafluoroethylene (PTFE). The disclosure also provides a leaching system containing such a mask and a leaching vessel as well as methods of using the protective and leaching systems. The disclosure further provides a Lewis acid-based leaching agent and methods of its use. Finally, the disclosure provides a method of recycling a PDC or carbide element using a Lewis acid-based leaching agent. 1. A method of recycling a PDC or carbide element comprising:{'sub': 3', '2, 'leaching a desired amount of Group VIII metal from a PDC or carbide element containing the Group VIII metal using a Lewis acid-based leaching agent selected from the group consisting of ferric chloride (FeCl), cupric chloride (CuCl), solutions thereof, and combinations thereof to form a Lewis acid/Group VIII metal solution;'}removing any solid remains of the PDC or carbide element from the Lewis acid/Group VIII metal solution;adjusting the pH of the Lewis acid Group VIII metal solution to cause precipitation of the Group VIII metal; andcollecting the precipitated Group VIII metal.2. The method according to claim 1 , wherein the Group VIII metal comprises Fe claim 1 , Co claim 1 , Ni claim 1 , alloys thereof claim 1 , or a mixture thereof.3. The method according to claim 1 , wherein the desired amount is at least 90%.4. The method according to claim 1 , wherein the Lewis acid leaching agent comprises a solution of 0.5 to 50 g ferric chloride in 100 mL water.5. The method according to claim 4 , wherein the Lewis acid leaching agent comprises up to 50% by volume hydrochloric acid.6. The method according to claim 4 , wherein the leaching agent further comprises up to 50% by volume nitric acid.7. The method according to claim 4 , wherein the leaching agent ...

INSTRUMENTED CORE BARRELS AND METHODS OF MONITORING A CORE WHILE THE CORE IS BEING CUT

A formation core analysis system can include an inner barrel and a toroidal electromagnetic antenna which transmits electromagnetic signals into a formation core when the core is received in the inner barrel. Another formation core analysis system can include an inner barrel and multiple longitudinally spaced apart electrodes which electrically contact a formation core when the core is received in the inner barrel. A speed of displacement of the core into the inner barrel may be indicated by differences between measurements taken via the electrodes as the core displaces into the inner barrel. A method of measuring resistivity of a formation core as the core is being cut can include transmitting electromagnetic signals into the core from a toroidal electromagnetic antenna as the core is being cut by a coring bit. 1. A formation core analysis system for use in a subterranean well , the system comprising:an inner barrel; anda toroidal electromagnetic antenna which transmits electromagnetic signals into a formation core when the core is received in the inner barrel.2. The system of claim 1 , further comprising at least one electrode which electrically contacts the core when the core is received in the inner barrel.3. The system of claim 2 , wherein current induced in the core by the antenna flows between the core and the electrode.4. The system of claim 2 , further comprising an inductive coupling which transmits measurements taken via the electrode.5. The system of claim 2 , wherein the antenna and the electrode are included in an instrumented section of the inner barrel claim 2 , and wherein a coring bit which cuts the core rotates relative to the inner barrel.6. The system of claim 5 , wherein the inner barrel includes multiple longitudinally spaced apart instrumented sections.7. The system of claim 1 , further comprising multiple longitudinally spaced apart electrodes which electrically contact the core when the core is received in the inner barrel.8. The system of ...

APPARATUS AND METHODS FOR MONITORING A CORE DURING CORING OPERATIONS

One method of monitoring a formation core during coring operations can include measuring resistivities of a formation internal and external to a core barrel assembly, comparing the resistivities of the formation internal and external to the core barrel assembly, and determining a displacement of the core into the core barrel assembly, based at least in part on the comparing, while the core is being cut. A formation core analysis system can include multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a core while the core displaces into a core barrel assembly, and multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a formation external to the core barrel assembly while a coring bit penetrates the formation. A speed of displacement of the core may be indicated by differences in time between measurements taken via the different sets as the core displaces. 1. A method of monitoring a formation core during coring operations , the method comprising:measuring resistivities of a formation internal and external to a core barrel assembly;comparing the resistivities of the formation internal and external to the core barrel assembly; anddetermining a displacement of the core into the core barrel assembly, based at least in part on the comparing, while the core is being cut.2. The method of claim 1 , wherein determining the displacement of the core further comprises determining a speed of the core displacement into the core barrel assembly.3. The method of claim 1 , wherein determining the displacement of the core further comprises determining that the core is not displacing into the core barrel assembly.4. The method of claim 1 , wherein determining the displacement of the core further comprises determining that the core is collapsing in the core barrel assembly.5. The method of claim 1 , wherein measuring comprises transmitting electromagnetic waves into the formation.6. The method ...

Polycrystalline Diamond Element with Unleached Side Surface and System and Method of Controlling Leaching at the Side Surface of a Polycrystalline Diamond Element

The disclosure provides a PCD element containing a substrate and a PCD layer. The PCD has a top surface, a side surface, an intermediate surface, an unleached region containing a diamond body matrix and an interstitial matrix including a catalyst, and a leached region containing a diamond body matrix and empty space in the place of the interstitial matrix. The catalyst has been leached from the empty space in the place of the interstitial matrix. The unleached region is adjacent to a substantial portion of the side surface and the leached region is not adjacent to a substantial portion of the side surface, and the leached region is adjacent to the top surface or the intermediate surface. The disclosure also provides a system and method for leaching a PCD element including a liquid able to leach a catalyst and a protective member. 1. A PCD element comprising:a substrate; and a top surface,', 'a side surface,', 'an intermediate surface located between the top surface and the side surface,', 'an unleached region comprising a diamond body matrix and an interstitial matrix comprising a catalyst; and', 'a leached region comprising a diamond body matrix and empty space in the place of an interstitial matrix;, 'a PCD layer, the PCD layer comprisingwherein the catalyst has been leached from the empty space in the place of the interstitial matrix,wherein the unleached region is adjacent to a substantial portion of the side surface and the leached region is not adjacent to a substantial portion of the side surface, andwherein the leached region is adjacent to at least a portion of the top surface or at least a portion of the intermediate surface.2. The PCD element according to claim 1 , wherein intermediate surface comprises a chamfer.3. The PCD element according to claim 1 , wherein the intermediate surface comprises a radius.4. The PCD element according to claim 1 , wherein the intermediate surface comprises a bevel.5. The PCD element according to claim 1 , wherein the ...

SUPER-ABRASIVE MATERIAL WITH ENHANCED ATTACHMENT REGION AND METHODS FOR FORMATION AND USE THEREOF

The disclosure provides a super-abrasive body including a thermally stable polycrystalline diamond (TSP) body having a top region and an enhanced attachment region, wherein the enhanced attachment region includes tungsten carbide particles having a volume of at least 30% of the total volume of the enhanced attachment region. The disclosure further provides a super-abrasive element having the super-abrasive body attached to a substrate via an attachment material located in or around the tungsten carbide particles. The disclosure additionally provides earth-boring drill bits with such a super-abrasive element. Further, the disclosure provides methods of forming such super-abrasive bodies and elements by forming a PCD body with particle of tungsten carbide in an enhanced attachment region, then leaching the PCD body and attaching it to a substrate via an attachment material in or around the tungsten carbide particles. 1. A super-abrasive body comprising a thermally stable polycrystalline diamond (TSP) body having a top region and an enhanced attachment region , wherein the enhanced attachment region comprises tungsten carbide particles having a volume of at least 30% of the total volume of the enhanced attachment region , and wherein the TSP body is formed from polycrystalline diamond (PCD) leached sufficiently to exhibit thermal stability at temperatures above 750° C.2. The super-abrasive body according to claim 1 , wherein the TSP body comprises polycrystalline diamond (PCD) containing diamond and catalyst from which at least 85% of the catalyst has been removed.3. The super-abrasive body according to claim 1 , wherein the TSP body comprises a FeCl-acid-leached TSP body.4. The super-abrasive body according to claim 1 , wherein the tungsten carbide particles comprise eutectic tungsten carbide.5. A super-abrasive element comprising:a thermally stable polycrystalline diamond (TSP) body having a top region and an enhanced attachment region, wherein the enhanced ...

CORE AND DRILL BITS WITH INTEGRATED OPTICAL ANALYZER

A disclosed method for obtaining a core sample includes directing light at a core sample being collected, receiving reflected light from the core sample, and analyzing the received reflected light to determine one or more characteristics of the core sample and/or form an image of the core sample. Characteristics include rock type, hydrocarbon type, water concentration, porosity, and permeability. The light may be infrared (IR), visible, and/or ultraviolet (UV). The received reflected light may be passed through one or more multivariate optical elements (MOEs). Measurements made at two different positions on the core sample may be used to determine a coring rate. A described coring bit includes a barrel to receive a core sample, a light source illuminating the core sample as it enters the barrel, a detector system that receives reflected light from the core sample, and an optical transmission system communicating light to and from the core sample. 1. A drill bit comprising:fixed cutting teeth to form a borehole through a formation as the bit rotates;at least one impact arrestor that rides in a groove formed by the cutting teeth; andan optical analyzer that illuminates the formation through a window in the impact arrestor and analyzes light reflected from the formation.2. The bit of claim 1 , further comprising at least one optical fiber o communicate light between the window and the optical analyzer.3. The bit of claim 1 , wherein the optical analyzer includes a light source claim 1 , a light sensor claim 1 , and an optical path from the light source to the light sensor via the window.4. The bit of claim 3 , wherein the optical analyzer includes at least one multivariate optical element (MOE) that intersects the optical path.5. The bit of claim 3 , wherein the optical analyzer includes a filter wheel that successively places different filters in the optical path.6. The bit of claim 5 , wherein at least one of said filters is an MOE.7. The bit of claim 1 , further ...

SYSTEM AND METHOD FOR MEASURING GAPS USING AN OPTO-ANALYTICAL DEVICE

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes determining a distance between a portion of the drilling tool and the formation based on the received electromagnetic radiation. 1. A method comprising:drilling a wellbore in a formation with a drilling tool;receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool near the end of the wellbore; anddetermining a distance between a portion of the drilling tool and the formation based on the received electromagnetic radiation.2. The method of claim 1 , further comprising determining an amount of bit whirl associated with the drilling tool based on the determined distance.3. The method of claim 1 , further comprising determining an amount of bit walk associated with the drilling tool based on the determined distance.4. The method of claim 1 , further comprising determining an amount of bit tilt associated with the drilling tool based on the determined distance.5. The method of claim 4 , wherein determining an amount of bit tilt comprises:determining a first distance between a first portion of the drilling tool and the formation;determining a second distance between a second portion of the drilling tool and the formation; andcomparing the first distance and the second distance.6. The method of claim 1 , further comprising determining a depth of cut associated with the drilling tool based on the determined distance.7. The method of claim 6 , wherein determining a depth of cut associated with the drilling tool based on the determined distance comprises:determining a first distance between the opto-analytical device and the formation; andcomparing the first distance and a second distance between the opto-analytical device and a cutting element of the drilling tool.8. The method of claim 1 , ...

SYSTEM AND METHOD FOR ANALYZING DOWNHOLE DRILLING PARAMETERS USING AN OPTO-ANALYTICAL DEVICE

In one embodiment, a downhole drilling tool configured to engage a formation to form a wellbore includes one or more channels formed in a bit body, the channels configured to direct electromagnetic radiation. The downhole drilling tool also includes an opto-analytical device integrated with the downhole drilling tool, the opto-analytical device configured to receive electromagnetic radiation directed through the one or more channels and detect a drilling characteristic based on the received electromagnetic radiation. 1. A downhole drilling system comprising:a downhole drilling tool configured to engage a formation to form a wellbore, the downhole drilling tool including:one or more channels formed in a bit body, the one or more channels configured to direct electromagnetic radiation; andan opto-analytical device integrated with the downhole drilling tool, the opto-analytical device configured to receive electromagnetic radiation directed through the one or more channels and detect a drilling characteristic based on the received electromagnetic radiation.2. The system of claim 1 , wherein the one or more channels are configured to direct the electromagnetic radiation through a surface of the bit body facing the formation and are formed in at least one of:a blade disposed outwardly from exterior portions of the bit body; andone ore more cutting elements disposed outwardly from exterior portions of the bit body.3. (canceled)4. (canceled)5. The system of claim 1 , wherein the electromagnetic radiation is generated by friction associated with the downhole drilling tool engaging the formation.6. The system of claim 1 , further comprising:an illumination source integrated with the downhole drilling tool and configured to generate the electromagnetic radiation; anda power source integrated with the downhole drilling tool and configured to supply power to the illumination source and the opto-analytical device.7. (canceled)8. The system of claim 6 , wherein the power source ...

SYSTEM AND METHOD FOR DETECTING VIBRATIONS USING AN OPTO-ANALYTICAL DEVICE

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting vibrations associated with drilling the wellbore based on the received electromagnetic radiation. 1. A method comprising:drilling a wellbore in a formation with a drilling tool;receiving electromagnetic radiation generated in the wellbore using an opto-analytical device coupled to the drilling tool; anddetecting vibrations associated with drilling the wellbore based on the received electromagnetic radiation.2. The method of claim 1 , wherein detecting vibrations associated with drilling the wellbore comprises detecting changes in the received electromagnetic radiation.3. The method of claim 1 , detecting vibrations associated with drilling the wellbore comprises:emitting electromagnetic radiation toward a mass coupled to a spring in the drilling tool; anddetecting changes in an intensity of the received electromagnetic radiation, wherein the received electromagnetic radiation is derived from the emitted electromagnetic radiation.4. The method of claim 1 , further comprising determining rotational speed of the drilling tool based on the detected vibrations.5. The method of claim 1 , further comprising determining the whirl speed of the drilling tool based on the detected vibrations.6. The method of claim 1 , further comprising determining one or more characteristics of the formation based on the detected vibrations.7. The method of claim 1 , further comprising determining a distance between the formation and the drilling tool claim 1 , wherein the detecting vibrations is based on the determined distance between the formation and the drilling tool.8. A downhole drilling system comprising:a downhole drilling tool configured to drill a wellbore in a formation with a drilling tool; and receive electromagnetic radiation ...

LEACHING ULTRAHARD MATERIALS BY ENHANCED DEMETALYZATION

The present disclosure relates to methods for enhanced demetalyzation of an ultrahard material, such as polycrystalline diamond (PCD) or cubic boron nitride (CBN), using a thiourea solution. The thiourea solution may contain thiourea and an acid, such as a Bronstead acid suitable for leaching. The thiourea may contain thiourea or a substituted thiourea, including tautomers thereof. The ultrahard material may be exposed to the thiourea solution for a time and under conditions sufficient to remove at least a desired amount of a metal, such as a catalyst used during formation of the PCD or CBN, from at least a portion of the ultrahard material. 1. A method of removing a target metal from an ultrahard material , the method comprising:exposing the ultrahard material to a thiourea solution comprising at least one thiourea and at least one acid for a time and under conditions sufficient to remove at least 70% of the target metal from at least a portion of the ultrahard material.2. The method of claim 1 , wherein the ultrahard material comprises polycrystalline diamond (PCD).3. The method of claim 1 , wherein the target metal comprises a catalyst used during formation of the ultrahard material.4. The method of claim 3 , wherein the catalyst comprises a Group VIII metal or alloy thereof.5. The method of claim 3 , wherein the catalyst comprises cobalt claim 3 , a cobalt alloy claim 3 , nickel claim 3 , a nickel alloy claim 3 , or a combination thereof.6. The method of claim 3 , wherein the catalyst substantially lacks iron or an iron alloy.71010. The method of claim 1 , wherein the thiourea solution comprises between M and M thiourea.9. The method of claim 8 , wherein R claim 8 , R claim 8 , R claim 8 , and Rare independently an allyl claim 8 , an alkenyl claim 8 , an alkynyl claim 8 , a C-chain claim 8 , such as a C claim 8 , or a Cchain claim 8 , an alcohol claim 8 , an aldehyde claim 8 , a carbonate claim 8 , a carboxylate claim 8 , carboxylic acid claim 8 , an ester claim ...

METHOD AND APPARATUS FOR RESISTIVITY MEASUREMENTS

An apparatus for measuring a resistivity of a formation comprising an instrumented bit assembly coupled to a bottom end of the apparatus. At least one first electromagnetic wave antenna transmits an electromagnetic wave signal into the formation. At least one second electromagnetic wave antenna located on the instrumented bit assembly and longitudinally spaced apart from the at least one first electromagnetic wave antenna receives the electromagnetic wave signal transmitted through the formation. Electronic circuitry is operably coupled to the at least one second electromagnetic wave antenna to process the received signal to determine a resistivity of the formation proximate the instrumented bit assembly. 1. A system for measuring a resistivity of a formation comprising:an instrumented drill bit coupled to a bottom end of a bottom hole assembly;at least one first electromagnetic wave antenna located in the bottom hole assembly to transmit an electromagnetic wave signal into the formation;at least one second electromagnetic wave antenna located on the instrumented drill bit and longitudinally spaced apart from the at least one first electromagnetic wave antenna to receive the electromagnetic wave signal transmitted through the formation; andelectronic circuits operably coupled to the at least one second electromagnetic wave antenna to process the received signal to determine a resistivity of the formation proximate the instrumented drill bit;wherein the at least one second electromagnetic wave antenna comprises a plurality of coil receivers mounted circumferentially around the instrumented drill bit to detect a radial resistivity of the formation at the instrumented drill bit.2. The system of wherein a plane of the at least one first electromagnetic wave antenna is tilted at a first predetermined angle relative to a longitudinal axis of the instrumented drill bit.3. The system of wherein the first predetermined angle is in the range of about 0° to about 90°.4. The ...

SYSTEM AND METHOD FOR DETECTING DRILLING EVENTS USING AN OPTO-ANALYTICAL DEVICE

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation at an opto-analytical device coupled to the drilling tool. The method also includes determining a drilling characteristic based on the received electromagnetic radiation, and detecting an event associated with drilling the wellbore based on the determined drilling characteristic. 1. A method for drilling a wellbore , comprising:drilling a wellbore in a formation with a drilling tool;receiving electromagnetic radiation at an opto-analytical device coupled to the drilling tool;determining a drilling characteristic based on the received electromagnetic radiation; anddetecting an event associated with drilling the wellbore based on the determined drilling characteristic.2. The method of claim 1 , further comprising modifying drilling the wellbore based on the detected event.3. The method of claim 1 , further comprising emitting electromagnetic radiation from the drilling tool claim 1 , wherein the received electromagnetic radiation is derived from the emitted electromagnetic radiation.4. The method of claim 1 , wherein the received electromagnetic radiation is derived from heat of the drilling tool.5. The method of claim 1 , wherein the drilling characteristic is selected from the group consisting of a temperature of the formation claim 1 , a temperature of the drilling tool claim 1 , a temperature of fluids between the drilling tool and the formation claim 1 , a porosity of the formation claim 1 , a density of the formation claim 1 , a chemical composition of the formation claim 1 , a chemical composition of fluids between the drilling tool and the formation claim 1 , a pH of the fluids between the drilling tool and the formation claim 1 , and a material state of the formation.6. The method of claim 1 , wherein detecting the event associated with drilling the wellbore comprises detecting a natural gas reservoir ...

SYSTEM AND METHOD FOR MEASURING TEMPERATURE USING AN OPTO-ANALYTICAL DEVICE

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting a temperature associated with drilling the wellbore based on the received electromagnetic radiation. 1. A method comprising:drilling a wellbore in a formation with a drilling tool;receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool; anddetecting a temperature associated with drilling the wellbore based on the received electromagnetic radiation.2. The method of claim 1 , further comprising emitting electromagnetic radiation from the drilling tool claim 1 , wherein the received electromagnetic radiation is derived from the emitted electromagnetic radiation.3. The method of claim 1 , wherein the received electromagnetic radiation is derived from heat of the drilling tool.4. The method of claim 1 , wherein detecting a temperature associated with drilling the wellbore comprises detecting a temperature of a cutting element of the drilling tool.5. The method of claim 4 , further comprising replacing the cutting element of the drilling tool based on the detected temperature.6. The method of claim 1 , wherein detecting a temperature associated with drilling the wellbore comprises:detecting a first temperature of a first cutting element of the drilling tool;detecting a second temperature of a second cutting element of the drilling tool; andcomparing the first temperature with the second temperature.7. (canceled)8. The method of claim 6 , further comprising modifying a weight on the drilling tool based on the comparison.9. The method of claim 6 , further comprising modifying an amount of fluid between the drilling tool and the formation based on the comparison.10. The method of claim 1 , wherein detecting a temperature associated with drilling the wellbore comprises detecting a ...

SYSTEM AND METHOD FOR ANALYZING CUTTINGS USING AN OPTO-ANALYTICAL DEVICE

In one embodiments, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting a characteristic of cuttings associated with drilling the wellbore based on the received electromagnetic radiation. 1. A method for drilling a wellbore comprising:drilling a wellbore in a formation with a drilling tool;receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool; anddetecting a characteristic of cuttings associated with drilling the wellbore based on the received electromagnetic radiation.2. The method of claim 1 , further comprising modifying a design of the drilling tool based on the characteristic of the cuttings.3. The method of claim 1 , further comprising modifying a drilling factor of a drilling operation based on the characteristic of the cuttings claim 1 , the drilling factor being at least one of weight on the drilling tool and revolutions per minute of the drilling tool.4. (canceled)5. The method of claim 1 , further comprising modifying an amount of drilling fluid between the drilling tool and the formation based on the characteristic of the cuttings.6. The method of claim 1 , further comprising modifying a composition of drilling fluid between the drilling tool and the formation based on the characteristic of the cuttings.7. The method of claim 1 , further comprising emitting electromagnetic radiation from the drilling tool claim 1 , wherein the received electromagnetic radiation is derived from the emitted electromagnetic radiation.8. The method of claim 7 , wherein the emitted electromagnetic radiation is emitted from a first channel formed in the drilling tool claim 7 , and wherein the received electromagnetic radiation is received at a second channel formed in the drilling tool.9. The method of claim 1 , wherein the received electromagnetic ...

Bearing contact pressure reduction in well tools

A method of reducing contact pressure between bearing surfaces of a well tool can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A well tool can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces can have a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition. The bearing surfaces can be formed on a thrust bearing, plain bearing, or other type of bearing between components of the well tool.

Drill bit bearing contact pressure reduction

A method of reducing contact pressure between bearing surfaces of a drill bit can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A drill bit can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces has a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition.

Bearing contact pressure reduction in well tools

A method of reducing contact pressure between bearing surfaces of a well tool can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A well tool can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces can have a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition. The bearing surfaces can be formed on a thrust bearing, plain bearing, or other type of bearing between components of the well tool.

Drill bit bearing contact pressure reduction

A method of reducing contact pressure between bearing surfaces of a drill bit can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A drill bit can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces has a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition.

System and method for measuring gaps using an opto-analytical device

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes determining a distance between a portion of the drilling tool and the formation based on the received electromagnetic radiation.

High pressure jets for leaching catalysts from a polycrystalline diamond compact

Apparatuses and methods for leaching catalysts from a polycrystalline diamond compact (PDC) may utilize a high pressure jet. For example, a method may include impinging a jet of leaching fluid, including one or both of an acid and a caustic material, on a surface of a PDC disposed on a substrate at a fluid pressure ranging between 125 psi and 10,000.

Apparatus and methods for monitoring a core during coring operations

One method of monitoring a formation core during coring operations can include measuring resistivities of a formation internal and external to a core barrel assembly, comparing the resistivities of the formation internal and external to the core barrel assembly, and determining a displacement of the core into the core barrel assembly, based at least in part on the comparing, while the core is being cut. A formation core analysis system can include multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a core while the core displaces into a core barrel assembly, and multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a formation external to the core barrel assembly while a coring bit penetrates the formation. A speed of displacement of the core may be indicated by differences in time between measurements taken via the different sets as the core displaces.

Instrumented core barrels and methods of monitoring a core while the core is being cut

A formation core analysis system can include an inner barrel and a toroidal electromagnetic antenna which transmits electromagnetic signals into a formation core when the core is received in the inner barrel. Another formation core analysis system can include an inner barrel and multiple longitudinally spaced apart electrodes which electrically contact a formation core when the core is received in the inner barrel. A speed of displacement of the core into the inner barrel may be indicated by differences between measurements taken via the electrodes as the core displaces into the inner barrel. A method of measuring resistivity of a formation core as the core is being cut can include transmitting electromagnetic signals into the core from a toroidal electromagnetic antenna as the core is being cut by a coring bit.

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 includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted- drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.

Instrumented core barrels and methods of monitoring a core while the core is being cut

A formation core analysis system can include an inner barrel and a toroidal electromagnetic antenna which 5 transmits electromagnetic signals into a formation core when the core is received in the inner barrel. Another formation core analysis system can include an inner barrel and multiple longitudinally spaced apart electrodes which electrically contact a formation core when the core is 10 received in the inner barrel. A speed of displacement of the core into the inner barrel may be indicated by differences between measurements taken via the electrodes as the core displaces into the inner barrel. A method of measuring resistivity of a formation core as the core is being cut can 15 include transmitting electromagnetic signals into the core from a toroidal electromagnetic antenna as the core is being cut by a coring bit.

Leaching ultrahard materials by enhanced demetalyzation

The present disclosure relates to methods for enhanced demetalyzation of an ultrahard material, such as polycrystalline diamond (PCD) or cubic boron nitride (CBN), using a thiourea solution. The thiourea solution may contain thiourea and an acid, such as a Bronstead acid suitable for leaching. The thiourea may contain thiourea or a substituted thiourea, including tautomers thereof. The ultrahard material may be exposed to the thiourea solution for a time and under conditions sufficient to remove at least a desired amount of a metal, such as a catalyst used during formation of the PCD or CBN, from at least a portion of the ultrahard material.

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 includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted- drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.

Polycrystalline diamond element with unleached side surface and system and method of controlling leaching at the side surface of a polycrystalline diamond element

The disclosure provides a PCD element containing a substrate and a PCD layer. The PCD has a top surface, a side surface, an intermediate surface, an unleached region containing a diamond body matrix and an interstitial matrix including a catalyst, and a leached region containing a diamond body matrix and empty space in the place of the interstitial matrix. The catalyst has been leached from the empty space in the place of the interstitial matrix. The unleached region is adjacent to a substantial portion of the side surface and the leached region is not adjacent to a substantial portion of the side surface, and the leached region is adjacent to the top surface or the intermediate surface. The disclosure also provides a system and method for leaching a PCD element including a liquid able to leach a catalyst and a protective member.

Apparatus and methods for monitoring a core during coring operations

One method of monitoring a formation core during coring operations can include measuring resistivities of a formation internal and external to a core barrel assembly, comparing the resistivities of the formation internal and external to the core barrel assembly, and determining a displacement of the core into the core barrel assembly, based at least in part on the comparing, while the core is being cut. A formation core analysis system can include multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a core while the core displaces into a core barrel assembly, and multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a formation external to the core barrel assembly while a coring bit penetrates the formation. A speed of displacement of the core may be indicated by differences in time between measurements taken via the different sets as the core displaces.

System and method for detecting vibrations using an opto-analytical device

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting vibrations associated with drilling the wellbore based on the received electromagnetic radiation.

Instrumented core barrels and methods of monitoring a core while the core is being cut

Super-abrasive material with enhanced attachment region and methods for formation and use thereof

The disclosure provides a super-abrasive body including a thermally stable polycrystalline diamond (TSP) body having a top region and an enhanced attachment region, wherein the enhanced attachment region includes tungsten carbide particles having a volume of at least 30% of the total volume of the enhanced attachment region. The disclosure further provides a super-abrasive element having the super-abrasive body attached to a substrate via an attachment material located in or around the tungsten carbide particles. The disclosure additionally provides earth-boring drill bits with such a super-abrasive element. Further, the disclosure provides methods of forming such super-abrasive bodies and elements by forming a PCD body with particle of tungsten carbide in an enhanced attachment region, then leaching the PCD body and attaching it to a substrate via an attachment material in or around the tungsten carbide particles.

Instrumented core barrels and methods of monitoring a core while the core is being cut

A formation core analysis system can include an inner barrel and a toroidal electromagnetic antenna which transmits electromagnetic signals into a formation core when the core is received in the inner barrel. Another formation core analysis system can include an inner barrel and multiple longitudinally spaced apart electrodes which electrically contact a formation core when the core is received in the inner barrel. A speed of displacement of the core into the inner barrel may be indicated by differences between measurements taken via the electrodes as the core displaces into the inner barrel. A method of measuring resistivity of a formation core as the core is being cut can include transmitting electromagnetic signals into the core from a toroidal electromagnetic antenna as the core is being cut by a coring bit.

System and method for analyzing cuttings using an opto-analytical device

In one embodiments, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting a characteristic of cuttings associated with drilling the wellbore based on the received electromagnetic radiation.

System and method for detecting vibrations using an opto-analytical device

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting vibrations associated with drilling the wellbore based on the received electromagnetic radiation.

System and method for analyzing cuttings using an opto-analytical device

Method and apparatus for resistivity paints

En anordning for a måle en formasjonsresistivitet innbefattende en instrumentert kronesammenstilling koblet til en bunnende av anordningen. Minst en første elektromagnetiskbølgeantenne sender et elektromagnetisk bølgesignal inn i formasjonen. Minst en andre elektromagnetiskbølgeantenne posisjonert på den instrumenterte kronesammenstilllngen og i lengderetningen romlig atskilt fra den minste ene første elektromagnetiskbølgeantennen mottar det elektromagnetiske bølgesignalet sendt gjennom formasjonen. Elektroniske kretser funksjonelt koblet til den minste ene andre elektromagnetiskbølgeantennen for å behandle det mottatte signal for å bestemme en formasjonsresistivitet. A device for measuring formation resistance including an instrumented crown assembly coupled to a bottom of the device. At least one first electromagnetic wave antenna sends an electromagnetic wave signal into the formation. At least one second electromagnetic wave antenna positioned on the instrumented crown assembly and longitudinally spaced apart from the at least one first electromagnetic wave antenna receives the electromagnetic wave signal transmitted through the formation. Electronic circuits are functionally connected to the at least one other electromagnetic wave antenna to process the received signal to determine a formation resistivity.

system for measuring resistivity of a formation, method for determining resistivity, and instrumented drill bit

para medir uma resistividade de uma formação, método para determinar uma resistividade e, broca um aparelho para medir uma resistividade de uma formação, compreendendo um conjunto de broca instrumentado acoplado a uma extremidade de fundo do aparelho. pelo menos uma primeira antena de ondas eletromagnéticas transmite um sinal de onda eletromagnética para a formação. pelo menos uma segunda antena de ondas eletromagnéticas localizada sobre o conjunto de broca instrumentado e longitudinalmente espaçada da pelo menos uma primeira antena de ondas eletromagnéticas recebe o sinal de onda eletromagnética transmitido através da formação. circuitos eletrônicos são operacionalmente acoplados à pelo menos uma segunda antena de ondas eletromagnéticas para processar o sinal recebido para determinar uma resistividade da formação próximo ao conjunto de broca instrumentado. for measuring a resistivity of a formation, method for determining a resistivity, and drill an apparatus for measuring a resistivity of a formation, comprising an instrumented drill assembly coupled to a bottom end of the apparatus. At least one first electromagnetic wave antenna transmits an electromagnetic wave signal for formation. at least one second electromagnetic wave antenna located over the longitudinally spaced instrumented drill assembly of the at least one first electromagnetic wave antenna receives the electromagnetic wave signal transmitted through the formation. Electronic circuits are operatively coupled to at least a second electromagnetic wave antenna to process the received signal to determine a formation resistivity near the instrumented drill assembly.

System and method for detecting drilling events using an opto-analytical device

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation at an opto-analytical device coupled to the drilling tool. The method also includes determining a drilling characteristic based on the received electromagnetic radiation, and detecting an event associated with drilling the wellbore based on the determined drilling characteristic.

Instrumented core barrels and methods of monitoring a core while the core is being cut

A formation core analysis system can include an inner barrel and a toroidal electromagnetic antenna which transmits electromagnetic signals into a formation core when the core is received in the inner barrel. Another formation core analysis system can include an inner barrel and multiple longitudinally spaced apart electrodes which electrically contact a formation core when the core is received in the inner barrel. A speed of displacement of the core into the inner barrel may be indicated by differences between measurements taken via the electrodes as the core displaces into the inner barrel. A method of measuring resistivity of a formation core as the core is being cut can include transmitting electromagnetic signals into the core from a toroidal electromagnetic antenna as the core is being cut by a coring bit.

Apparatus and methods for monitoring a core during coring operations

One method of monitoring a formation core during coring operations can include measuring resistivities of a formation internal and external to a core barrel assembly, comparing the resistivities of the formation internal and external to the core barrel assembly, and determining a displacement of the core into the core barrel assembly, based at least in part on the comparing, while the core is being cut. A formation core analysis system can include multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a core while the core displaces into a core barrel assembly, and multiple longitudinally spaced apart sets of transmitters and receivers which measure resistivity of a formation external to the core barrel assembly while a coring bit penetrates the formation. A speed of displacement of the core may be indicated by differences in time between measurements taken via the different sets as the core displaces.

System, method and device for resistivity measurements

Drill bit bearing contact pressure reduction

A method of reducing contact pressure between bearing surfaces of a drill bit can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A drill bit can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces has a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition.

apparatus, method and system for executing instructions for predicting the performance of a drilling system.

Drill bit bearing contact pressure reduction

A method of reducing contact pressure between bearing surfaces of a drill bit can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A drill bit can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces has a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition.

Fremgangsmåte og system for å forutsi ytelsen av et boresystem for en gitt formasjon

Fremgangsmate og anordning for a forutsi et boresystems ytelse i en gitt formasjon

Fremgangsmåte og apparat for å forutsi ytelsen av et boresystem for boring av et brønnhull (14) i en gitt formasjon omfattende generering av en geologikarakteristikk av formasjonen (24) per dybdeenhet i henhold til en foreskrevet geologimodell, uthenting av spesifikasjoner for foreslått boreutstyr for bruk under boringen av brønnhullet (14), og forutsigelse av en boremekanikk som respons på spesifikasjonene som en funksjon av geologikarakteristikken per dybdeenhet i henhold til en foreskrevet boremekanikkmodell. Som respons på en forutsagt boremekanikk styrer en kontroller (52) en parameter i boringen av brønnhullet (14), Geologikarakteristikken omfatter i det minste bergfasthet. Spesifikasjonene omfatter minst en borkrone (22) spesifikasjon av en anbefalt borkrone (22). Til slutt, den forutsagte boremekanikk omfatter minst en av borkroneslitasje, mekanisk virkningsgrad, effekt, og operasjonsparametere. Et display er anordnet for å fremvise geologikarakteristikken og forutsagt boremekanikk per dybdeenhet, omfattende enten en displaymonitor (60) eller en skriver (62).

High pressure jets for leaching catalysts from a polycrystalline diamond compact

Apparatuses and methods for leaching catalysts from a polycrystalline diamond compact (PDC) may utilize a high pressure jet. For example, a method may include impinging a jet of leaching fluid, including one or both of an acid and a caustic material, on a surface of a PDC disposed on a substrate at a fluid pressure ranging between 125 psi and 10,000.

System and method for analyzing cuttings using an opto-analytical device

In one embodiments, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation using an opto-analytical device coupled to the drilling tool. The method also includes detecting a characteristic of cuttings associated with drilling the wellbore based on the received electromagnetic radiation.

System and method for detecting drilling events using an opto-analytical device

In one embodiment, a method includes drilling a wellbore in a formation with a drilling tool. The method further includes receiving electromagnetic radiation at an opto-analytical device coupled to the drilling tool. The method also includes determining a drilling characteristic based on the received electromagnetic radiation, and detecting an event associated with drilling the wellbore based on the determined drilling characteristic.