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序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
261	DRILL BIT WITH WEIGHT AND TORQUE SENSORS	EP10786748.3	2010-06-09	EP2440735B1	2018-10-17	GLASGOW, Keith; TEODORESCU, Sorin Gabriel; SULLIVAN, Eric; TRINH, Tu Tien; PRITCHARD, Daryl; CHENG, Xiaomin
A drill bit made according to one embodiment includes a bit body and at least one preloaded sensor in the bit body. In one aspect, the sensor may include a sensor element on a sensor body having a first end and a second end and wherein the sensor is preloaded after placing the sensor body in the bit body. In another aspect, the sensor may be preloaded outside the bit body and then placed in the bit body in a manner that enables the sensor to retain the preloading.
262	WEIGHT ON BIT CALCULATIONS WITH AUTOMATIC CALIBRATION	EP16813170.4	2016-11-21	EP3380697A2	2018-10-03	SPOERKER, Hermann, F.
A method of forming a wellbore with a drill string and that includes continuously and automatically measuring a TARE value of the drill string. The TARE value of the drill string is measured while the drill string is rotating, fluid is circulating in the drill string, and after the drill string has been axially stationary for a set period of time. The TARE value is designated as an average of the measured hook load over the latter half of the set period of time. Knowing the measured TARE value and a designated weight on bit (“WOB”) of the drill string, a hook load for supporting the drill string is calculated. Matching the force applied that supports the drill string to the calculated hook load results in an actual WOB that matches the designated WOB.
263	INDUCTIVE DOWNHOLE SENSOR WITH CENTER TAP FOR COMMON MODE REJECTION	EP16864941.6	2016-11-09	EP3374599A1	2018-09-19	KIRCHMEIER, Eduard; ZLOTNIK, Alexander
Systems, methods, and devices for evaluation of an earth formation intersected by a borehole using a logging tool. Methods include generating an excitation in the formation with an electromagnetic (EM) signal from a transmitter assembly at at least one frequency; making EM measurements using an EM tool on a tool string in the borehole by receiving a signal at at least one receiver assembly responsive to the excitation; wherein the at least one receiver assembly includes an induction antenna comprising a first winding and a second winding that share a common center tap, and wherein the average potential on the induction antenna is substantially the same as a ground potential. The receiver assembly or transmitter assembly may comprise a receiver or transmitter electrically connected to the induction antenna by a balun transformer, and a capacitive shield encompassing the induction antenna, the capacitive shield comprising a meander shaped isolation gap.
264	METHOD OF AUTOMATICALLY DETERMINING OFF-BOTTOM DRILLSTRING TORQUE	EP17160313.7	2013-10-22	EP3196406B1	2018-08-22	WANG, Lei; BAILEY, Jeffrey R.; O'DONNELL, Brian J.; CHANG, Dar-Lon; PAYETTE, Gregory S.
Methods for automatically determining off bottom drillstring torque. The methods include receiving data regarding a number of drilling parameters characterizing a wellbore drilling operation, wherein the plurality of drilling parameters include a surface torque, a drillstring rotary speed (RPM, revolutions per minute), a weight on bit (WOB), a hole depth, or a bit depth, or any combinations thereof. The surface torque is recorded as an off-bottom drillstring torque data point if: the bit depth is less than the hole depth; the RPM is within a target range; and the WOB is less than a threshold value. The off-bottom drillstring torque is calculated as a function of depth from a plurality of off-bottom drillstring torque data points.
265	METHOD TO DETECT DRILLING DYSFUNCTIONS	EP13854431.7	2013-10-22	EP2920400B1	2017-06-07	WANG, Lei; BAILEY, Jeffrey, R.; O'DONNELL, Brian, J.; CHANG, Dar-Lon; PAYETTE, Gregory, S.

266	A METHOD FOR HANDLING A COMPONENT IN THE CONSTRUCTION, MAINTENANCE AND REPAIR OF WELLS	EP10703105.6	2010-02-01	EP2391795B1	2017-03-29	KOEDERITZ, William Leo; PORCHE, Michael Nathan; WATSON, Graham Richard; COOKE, Aaron Christian; ELLISON, Leon Doyle; KAMMANN, Reinhold; WORMS, Manfred Hermann; LAM, Clive Chemo; MCCLUNG, Guy, Lamonte, III

267	CASTING METHOD FOR MATRIX DRILL BITS AND REAMERS	EP10823870	2010-10-08	EP2488317A4	2017-01-18	REESE MICHAEL R; GALLEGO GILLES; BUTEAUD SCOTT; HARRELL ALAN K; DREWS STEVEN W

268	METHODOLOGIES FOR MANUFACTURING SHORT MATRIX BITS	EP14778318	2014-03-19	EP2981665A4	2016-12-28	AMUNDSEN MARVIN WINDSOR; JOHNSON CHARLES DANIEL

269	DRILLSTRING	EP14863279	2014-11-20	EP3071780A4	2016-12-07	JEFFRYES BENJAMIN P
A drillstring comprising a length of drillpipes and a bottomhole assembly disposed at a downhole end of the length of drillpipes. The bottomhole assembly comprises a transition section proximal to the end of the length of drillpipes to reduce vibration of the bottomhole assembly during drilling. The transition section varies gradually in acoustic impedance between the acoustic impedance of the drillstring above the transition section and the acoustic impedance of the bottomhole assembly below the transition section. The transition section forms at least thirty percent (30%) of the total length of the bottomhole assembly.
270	APPARATUS AND METHODS FOR REAL TIME COMMUNICATION BETWEEN DRILL BIT AND DRILLING ASSEMBLY	EP11815413	2011-08-08	EP2601378A4	2016-11-30	TRINH TU TIEN; SULLIVAN ERIC
An apparatus and method of performing a wellbore operation. The apparatus includes a drill bit that has a cavity at an end thereof and a communication device placed in the cavity. The communication device includes a first section and a second section. An outer dimension of the second section is greater than an outer dimension of the first section. The second section includes a conduit configured to allow passage of a conductor from the drill bit to a location outside the drill bit so as to provide a direct connection of the conductor from the drill bit to an element outside the drill bit.
271	REPETITIVE PULSED ELECTRIC DISCHARGE APPARATUSES AND METHODS OF USE	EP13865782	2013-12-18	EP2935754A4	2016-10-19	MOENY WILLIAM M

272	DRILLSTRING	EP14863279.7	2014-11-20	EP3071780A1	2016-09-28	JEFFRYES, Benjamin P.
A drillstring comprising a length of drillpipes and a bottomhole assembly disposed at a downhole end of the length of drillpipes. The bottomhole assembly comprises a transition section proximal to the end of the length of drillpipes to reduce vibration of the bottomhole assembly during drilling. The transition section varies gradually in acoustic impedance between the acoustic impedance of the drillstring above the transition section and the acoustic impedance of the bottomhole assembly below the transition section. The transition section forms at least thirty percent (30%) of the total length of the bottomhole assembly.
273	PREDICTING DRILLABILITY BASED ON ELECTROMAGNETIC EMISSIONS DURING DRILLING	EP13854179.2	2013-10-18	EP3058396A1	2016-08-24	DASHEVSKY, Yuliy Aleksandrovich; TERENTEV, Sergey Alexandrovich; DOROVSKY, Vitaly Nikolaevich; DUBINSKY, Vladimir
An embodiment of a method of predicting drilling assembly performance includes: acquiring measurements of electromagnetic (EM) radiation emitted due to destruction of formation materials by a drilling assembly during a drilling operation; selecting input parameters, the input parameters including drilling assembly parameters, operational parameters, and the measurements of the EM radiation; supplying the input parameters to a mathematical drillability model; and generating a rock drillability parameter using the drillability model and the input parameters, the rock drillability parameter providing an indication of drilling performance.
274	PROCESS FOR CONSTRUCTING A WELL FOR EXPLOITING A RESERVOIR UNDER A SEA-BED OR OCEAN-BED	EP14802167.8	2014-10-16	EP3058160A2	2016-08-24	MOLASCHI, Claudio; MALIARDI, Alberto; FERRARA, Paolo
A process for constructing a well (1) for exploiting an oil or gas reservoir, comprising the following operations: (A) drilling a formation submerged by a water head, at least 3,600 meters deep or more, reaching the formation from the surface of the water with a drilling riser (7), and a drilling tool which passes internally through the drilling riser; and evacuating through the drilling riser (7) at least one of the circulating drilling fluid, the oil or natural gas coming from the formations and the resulting drilling materials. The drilling riser (7) has an external diameter equal to or smaller than 17 inches and reaches a wellhead (3) having an internal diameter equal to or smaller than 18.75 inches, and positioned in correspondence with or close to the seabed submerged which covers the formation.
275	ELECTRONICS FOR A THIN BED ARRAY INDUCTION LOGGING SYSTEM	EP13816529	2013-07-08	EP2872931A4	2016-07-20	MILES GERALD P; SARRIA CESAR A; MENA JARIO A; EBEID MOSTAFA M

276	SYSTEM AND METHOD OF SELECTING A DRILL BIT AND MODIFYING A DRILL BIT DESIGN	EP14842706.5	2014-09-05	EP3042036A1	2016-07-13	SACHIDANANDAM, Ambalavanan; NELSON, Anna Marie
A system for field selecting drill bit includes a server having a computing processor with functionality to perform: receiving a first simulation request, executing a first simulation to generate a first set of performance data, receiving a second simulation request, and executing a second simulation to generate a second set of performance data. A computing device coupled to the server having a graphical user interface with functionality to perform: selecting a baseline bit, inputting a plurality of drilling data, sending the first simulation request, receiving the first set of performance data, presenting the first set of performance data for review, modifying a parameter of a drill bit, sending the second simulation request with the modified parameter, receiving the second set of performance data from the second simulation, and presenting the first set of performance data and the second set of performance data for review.
277	ANTI-BALLING COATING ON DRILL BITS AND DOWNHOLE TOOLS	EP13846433	2013-09-19	EP2906772A4	2016-06-08	KING WILLIAM W; CHINTAMANEMI VAMSEE
A coating that includes a polyisocyanate compound and at least one metal inclusion selected from the group consisting of tungsten and tungsten carbide. The metal inclusions range between about five percent by weight to about fifty percent by weight. A downhole tool that includes a body, a shank positioned at one end of the body, at least one cutter coupled to the body, and a coating coupled to at least a portion of one or more of the body or the shank. The coating includes a polyisocyanate compound and at least one metal inclusion selected from the group consisting of tungsten, tungsten carbide, and aluminum. The metal inclusions range between about five percent by weight to about fifty percent by weight. An intermediate coating is optionally disposed between at least a portion of the coating and at least one of the body or the shank.
278	POLYCRYSTALLINE COMPACTS INCLUDING NANOPARTICULATE INCLUSIONS, CUTTING ELEMENTS AND EARTH-BORING TOOLS INCLUDING SUCH COMPACTS, AND METHODS OF FORMING SAME	EP11836880.2	2011-10-19	EP2632637B1	2016-06-08	DIGIOVANNI, Anthony, A.

279	MODULAR FIXED CUTTER EARTH-BORING BITS, MODULAR FIXED CUTTER EARTH-BORING BIT BODIES, AND RELATED METHODS	EP11002039.3	2007-04-20	EP2327856B1	2016-06-08	Mirchandani, Prakash K.; Waller, Michale E.; Weigold, Jeffrey L.; Mosco, Alfred J.

280	METHOD TO DETECT DRILLING DYSFUNCTIONS	EP13854431	2013-10-22	EP2920400A4	2016-05-18	WANG LEI; BAILEY JEFFREY R; O'DONNELL BRIAN J; CHANG DAR-LON; PAYETTE GREGORY S

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