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公开(公告)号：EP3387221A1
公开(公告)日：2018-10-17
申请号：EP16873674.2
申请日：2016-12-06
发明人： LEHR, Joerg , FULDA, Christian
CPC分类号： E21B47/18
摘要： A system for performing a wellbore operation while a fluid circulates in a wellbore may include a string, a fluid circulation system, a control device, The string may include at least a first tubular section and a second tubular section. Thea fluid circulating system has a first fluid path and a second fluid path, wherein only one of the first fluid path and the second fluid path circulate the fluid into the string at a specified time. The control device selects one of the first or second fluid path through which to convey the fluid into the string, at least one signal generator in hydraulic communication with the circulating fluid, the at least one signal generator configured to impart at least one pressure signal into the circulating fluid, and at least one pressure transducer in pressure communication with the circulating fluid and configured to detect the imparted at least one pressure signal, wherein the at least one signal generator and the at least one pressure transducer form a communication link, the communication link configured to convey information between at least two locations along a flow path of the circulating drilling fluid, irrespective of the fluid path selected by the control device to convey the fluid into the drill string.
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公开(公告)号：EP2917454B1
公开(公告)日：2018-08-29
申请号：EP13853488.8
申请日：2013-11-06
CPC分类号： E21B17/1078 , E21B7/00 , E21B17/00 , E21B17/003 , E21B17/16 , E21B23/01 , E21B23/02 , E21B47/00 , E21B47/01 , E21B47/011 , E21B47/122 , E21B47/123 , E21B47/18
摘要： A downhole probe is adapted to be supported in drill string sections having different internal diameters with the use of a set of interchangeable centralizers. Each centralizer is dimensioned to snugly receive the downhole probe and to bear against the bore wall of a drill-string section. Interchangeable axial supports such as spiders may also be provided in a set. The downhole probe may comprise a slick body. As drilling progresses the downhole probe may be adapted to be received in drill string sections of varying diameters.
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公开(公告)号：EP3359771A1
公开(公告)日：2018-08-15
申请号：EP15910907.3
申请日：2015-12-16
发明人： HUANG, Wei, Hsuan
摘要： An electrical impedance tomography based flow monitoring system includes a flow accepting pipe having a cylindrical grid of m×n electrodes, wherein m is an integer greater than 3 representing a number of circumferential grid positions and n is an integer greater than 2 representing a number of axial grid positions. Each combination of adjacent circumferential grid positions and adjacent axial grid positions defines a cell having four electrodes electrically connectable in various combinations by a switch, and the switches are set to connect the electrodes into multiple axially-extending arrays. The system further comprises a controller coupled to the multiple axially-extending arrays to acquire multi-point electrical tomography measurements, wherein the controller processes the measurements to derive a monitored quantity.
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公开(公告)号：EP3332083A4
公开(公告)日：2018-07-11
申请号：EP15907473
申请日：2015-10-29
发明人： SKINNER NEAL GREGORY , ELLMAUTHALER ANDREAS , NUNES LEONARDO DE OLIVEIRA , STOKELY CHRISTOPHER LEE , BARFOOT DAVID ANDREW
CPC分类号： F04B49/065 , E21B47/123 , E21B47/18 , F04B47/02 , F04B2201/0201 , F04B2201/0209
摘要： An example system for detecting mud pump stroke information comprises a distributed acoustic sensing (DAS) data collection system coupled to a downhole drilling system, a stroke detector coupled to a mud pump of the downhole drilling system configured to detect strokes in the mud pump and to generate mud pump stroke information based on the detected strokes, and a fiber disturber coupled to the stroke detector and to optical fiber of the DAS data collection system configured to disturb the optical fiber based on mud pump stroke information generated by the stroke detector. The system further comprises a computing system comprising a processor, memory, and a pulse detection module operable to transmit optical signals into the optical fiber of the DAS data collection system, receive DAS data signals in response to the transmitted optical signals, and detect mud pump stroke information in the received DAS data signals.
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公开(公告)号：EP3004541B1
公开(公告)日：2018-05-02
申请号：EP14804293.0
申请日：2014-05-21
IPC分类号： E21B47/18
CPC分类号： E21B47/18
摘要： A method of interpreting a signal transmitted through a drilling fluid disposed within a telemetry channel of a wellbore that includes defining a finite number of distinct message signals for representing conditions within the wellbore. The method also includes transmitting one of the message signals through the telemetry channel, and receiving a distorted signal that includes the message signal as distorted by transmission through the telemetry channel. A channel impulse response is estimated and applied to at least one of the message signals to generate at least one predicted signal. A comparison is made between the predicted signal and the distorted signal, and an estimation is made as to which of the finite number of message signals is included in the distorted signal based on the comparison.
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7.发明公开
公开(公告)号：EP3311124A1
公开(公告)日：2018-04-25
申请号：EP16744945.3
申请日：2016-06-22
CPC分类号： E21B47/18 , E21B47/122 , G01F1/666 , G01F1/74 , G01N29/02 , G01N29/14 , G01N29/46 , G01N2291/02416 , G01N2291/02433
摘要： Systems, computer-implemented methods, and non-transitory computer-readable medium having a stored computer program provide characterization of multiphase fluid flow (MPF) using approximate entropy calculation techniques to enhance measuring and monitoring of a flow regime in a segment of pipe for hydrocarbon-production operations. The systems and methods can be optimized using principal component analysis.
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8.发明公开MODULATION SCHEME FOR HIGH SPEED MUD PULSE TELEMETRY WITH REDUCED POWER REQUIREMENTS 审中-公开低功率需求的高速泥浆脉冲调制方案
公开(公告)号：EP3259445A1
公开(公告)日：2017-12-27
申请号：EP16753058.3
申请日：2016-02-18
CPC分类号： E21B47/18 , E21B47/182
摘要： A method for transmitting data from a downhole location to a location at the surface of the earth includes: receiving data using a modulator disposed at the downhole location on a drill tubular in a borehole penetrating the earth and modulating the data using offset quadrature phase shift keying (OQPSK) and smooth transitions between phase shifts to produce a series of two-bit symbols having smooth transitions in transition intervals between phase shifts of both in-phase and quadrature-phase components of the OQPSK modulated data. The method further includes transmitting the series of two-bit symbols as an acoustic signal in drilling fluid disposed in the borehole using a mud-pulser, receiving the acoustic signal using a receiver disposed uphole from the downhole location; and demodulating the acoustic signal using a demodulator coupled to the receiver to provide demodulated data.
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公开(公告)号：EP3250786A1
公开(公告)日：2017-12-06
申请号：EP16744251.6
申请日：2016-01-30
CPC分类号： H04Q9/00 , E21B47/04 , E21B47/122 , E21B47/18 , H04B13/02 , H04B15/00 , H04L7/0008 , H04L7/0041 , H04L7/04 , H04L7/041 , H04Q9/04
摘要： A method may include providing one or more telemetry transmission systems, the one or more transmission systems comprising one or more receivers and one or more transmitters. The method may also include transmitting a first synchronization sequence from the one or more telemetry transmission systems, the first synchronization sequence transmitted in a first channel, and the first synchronization sequence being at least a portion of a first telemetry signal. In addition, the method may include transmitting a second synchronization sequence the one or more telemetry transmission systems, the second synchronization sequence transmitted in a second channel, and the second synchronization sequence being at least a portion of a second telemetry signal. The first and second synchronization sequences may be transmitted simultaneously or at a predetermined time difference. The method may include receiving the first synchronization sequence at the one or more receivers, and receiving the second synchronization sequence at the one or more receivers.
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公开(公告)号：EP3117074A4
公开(公告)日：2017-11-22
申请号：EP14885128
申请日：2014-12-18
申请人： ADVANCETECH APS
发明人： SOLEM SIGURD
CPC分类号： E21B23/00 , E21B7/061 , E21B10/26 , E21B17/1078 , E21B21/08 , E21B21/10 , E21B23/06 , E21B33/12 , E21B34/06 , E21B34/102 , E21B43/04 , E21B44/00 , E21B47/00 , E21B47/06 , E21B47/18 , E21B2034/007
摘要： An activation method and a mechanism in which a pressure or flow sensor senses the pressure or flow rate of the treatment fluid being pumped through the drill string. A controller powered by a power source monitors the sensed pressure or flow rate within a first time window and via a suitable activator activates a first downhole tool or operation mode thereof if the sensed pressure or flow rate is stable with that time window. The controller monitors the sensed pressure or flow rate within a second time window and activates a second downhole tool or second operation mode of the first downhole tool if the sensed pressure or flow rate is stable with that time window. In one embodiment, the sensed pressure is combined with a rotation sensor sensing the rotation of the drill string. The controller logs the starting time for the pumping and the rotation.
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