Abstract: An apparatus detects a fluid flow. The apparatus includes a nuclear magnetic resonance (NMR) tool configured to perform an NMR measurement on the fluid in a sensitive volume by establishing a magnetic field in the sensitive volume and transmitting a sequence of refocus pulses, without a tipping pulse, the NMR measurement comprising spin echo signals. The apparatus also includes a processor configured to detect a presence of the fluid flow in the sensitive volume based on the spin echo signals.

Abstract: An apparatus and method estimate a property of a fluid flow. The apparatus includes a nuclear magnetic resonance (NMR) tool performing an NMR measurement on the fluid in a sensitive volume. The apparatus also includes a processor receiving the NMR measurement from the NMR tool, determining a frequency or phase change of the spin echo signals from the NMR measurement, and estimating the property using the frequency or phase change.

Abstract: A media displacement device has a body configured to be positioned radially outwards of a tool having an antenna for transmitting electromagnetic energy to or receiving electromagnetic energy from an earth formation. The body is made of materials causing less power loss to electromagnetic energy transmitted or received by the tool than the media the body is configured to displace.

Abstract: An apparatus for estimating a nuclear magnetic resonance (NMR) property of an earth formation penetrated by a borehole, the apparatus including: a logging tool having a source of a static magnetic field configured to polarize a region of investigation in the earth formation; a transmitter antenna disposed at the logging tool and configured to transmit electromagnetic energy into the region of investigation; at least one receiver sensor disposed at the logging tool and configured to receive NMR signals from the region of investigation in response to an interaction between the static magnetic field and the transmitted electromagnetic energy; and a processor configured to: receive the NMR signals from the at least one receiver sensor; associate the NMR signals received from the at least one receiver sensor with an azimuthal direction at which the NMR signals were received; and estimate the property from the NMR signals and the associated azimuthal directions.

Abstract: The disclosure provides an apparatus and method for estimating one or more formation properties downhole. The apparatus includes a tool body that has a longitudinal axis. The tool body has a number of metallic pillars that are attached to or are an integral part of the tool body. Antenna wires may be positioned on the tool body between the pillars in a plurality of orientations to provide a multidirectional antenna. An insulating material is used to cover the antenna wires. A high magnetic permeability material is placed between the antenna wires and the tool body. The antenna may be configured to operate as a transmitter or as a receiver for a resistivity sensor or an NMR sensor.

Abstract: NMR spin echo signals are measured in a small borehole during drilling. Signals measured in a plurality of regions of investigation are combined to increase the signal strength.

Abstract: An apparatus for performing nuclear magnetic resonance (NMR) measurements of a material of interest includes an NMR tool and a processor. The NMR tool includes a transmitter antenna; a transmitter coupled to the transmitter antenna; and a receiver antenna configured to receive NMR signals in response to transmitted pulses of electromagnetic energy transmitted by the transmitter antenna. The NMR signals include at least a first signal and a second signal of a phase-alternated group of signals. The processor is configured to receive the NMR signals; receive a first system gain related to the first signal and a second system gain related to the second signal, each system gain being related to a system comprising the NMR tool and the material of interest; and calibrate the NMR signals using the first system gain and the second system gain.

Abstract: A time measurement device for a geologic downhole measurement tool is provided. The device includes a plurality of oscillators for measuring a time value. At least one of the plurality of oscillators has a first temperature range that is different from a second temperature range of at least another of the plurality of oscillators. A time measurement system and a method for providing a time measurement are also provided.

Abstract: Apparatus, methods and computer programs disclosed herein, in one aspect, estimate a temperature of a selected region of an earth formation using a virgin formation temperature of the earth formation, a downhole fluid temperature measured over time, an elapsed time between drilling proximate the selected region and making of a formation evaluation measurement of the selected region, an estimate of thermal conductivity of the earth formation, and a heat capacity of the earth formation. In another aspect, the apparatus, methods and computer programs utilize the estimated temperature and the formation evaluation measurement to estimate a property of interest of the selected region. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A system for measuring at least one of a temperature and a pressure of an earth formation is disclosed. The system includes: a downhole tool disposed in a borehole and configured to be movable within the borehole; at least one nuclear quadrupole resonance (NQR) measurement device including a transmitter configured to emit a radiofrequency magnetic field having at least one selected frequency band into the earth formation to cause a component thereof to produce a NQR signal, and a detector configured to detect the NQR resonance signal; and a processor in operable communication with the measurement device and configured to generate NQR data from the NQR signal and calculate at least one of the temperature and the pressure of the earth formation therefrom. A method of measuring at least one of a temperature and a pressure of an earth formation is also enclosed.

Abstract: NMR spin echo signals are measured in a borehole during underbalanced drilling. A magnetic field gradient in the region of examination is selected to suppress an effect of a formation fluid flow on the produced signals, the fluid flow being caused by the excess of the formation pressure over the borehole fluid pressure.

Abstract: NMR spin echo signals are measured in a small borehole during drilling. Signals measured in a plurality of regions of investigation are combined to increase the signal strength.

Abstract: NMR spin echo signals are measured in a borehole during drilling. Signals measured in a plurality of regions of investigation with different depths of investigation in the borehole are processed to give a radial profile of formation properties, including a potential gas kick.

Abstract: Saturation pulse sequences are designed to ensure complete saturation of nuclear spins for dual wait time measurements and saturation recovery measurements in the case of axial motion of a downhole NMR logging tool. Frequency and/or phase modulation may be used. An auxiliary saturation coil may be used.

Abstract: The disclosure provides apparatus and method for estimating an electrical property downhole. The apparatus, in one aspect, includes an antenna that comprises a unitary metallic member that has a longitudinal axis and a radial axis, at least one slot made in the metallic member and an electrical conductor over the at least one slot to form an antenna. In one aspect, a high magnetic permeability material may be placed between the electrical conductor and a bottom of the slots. The antenna may be configured to operate as a transmitter for transmitting electromagnetic signals into a formation or a receiver for receiving electromagnetic signals from the formation.

Abstract: In one aspect, an apparatus and a method for estimating one or more electrical properties downhole are provided. The apparatus, in one embodiment, may include a metallic member that has a longitudinal axis and a radial axis, at least two groups of slots formed in the metallic member, each group of slots having at lest two rows of slots, each row of slots containing at least one slot, and an electrical conductor placed over the at least two rows of slots at an angle to the radial axis of the metallic member to form an antenna of a tool for use in a wellbore for estimating the electrical properties downhole. The antenna may be configured to operate as a transmitter or as a receiver.

Abstract: An apparatus for obtaining information from a subterranean environment, the apparatus includes: an atomic magnetometer configured to measure a magnetic field related to the information. An associated method for obtaining the information is also disclosed.

Abstract: An apparatus for estimating a nuclear magnetic resonance (NMR) property of an earth formation penetrated by a borehole, the apparatus including: a logging tool having a source of a static magnetic field configured to polarize a region of investigation in the earth formation; a transmitter antenna disposed at the logging tool and configured to transmit electromagnetic energy into the region of investigation; at least one receiver sensor disposed at the logging tool and configured to receive NMR signals from the region of investigation in response to an interaction between the static magnetic field and the transmitted electromagnetic energy; and a processor configured to: receive the NMR signals from the at least one receiver sensor; associate the NMR signals received from the at least one receiver sensor with an azimuthal direction at which the NMR signals were received; and estimate the property from the NMR signals and the associated azimuthal directions.

Abstract: In a diagnostic system, messages which have occurred are collected and buffered with a short diagnostic test which is implemented in a control unit onboard the vehicle. The collected data are then transmitted into a memory area of the portable electronic driving authorization record, which therefore always contains the result of a short diagnostic test which has been carried out onboard. The result of this short diagnostic test is read out from the memory of the driving authorization record with a computer system in the customer reception of a servicing workshop, and is processed with a more wide-ranging diagnostic algorithm which builds on the result of the short diagnostic test.

Abstract: The invention relates to a motor vehicle diagnostic system for acquiring and storing diagnostic data and transmitting them from control units in a motor vehicle to a computer outside the motor vehicle. The system is composed of components which are located inside the vehicle and of components which are located outside the vehicle. Using a transmission module, in which a short diagnostic test is implemented, diagnostic data from onboard components are interrogated and are transmitted via a WLAN link to the computer system of a service company. The diagnostic data of the onboard components can be further processed using the computer system. The disclosed invention is aimed in particular at assisting a service employee in the vehicle reception of a service workshop.