Halliburton Energy Services, Inc.

Other

Nl Industries

William R Grayson

Paul F Rodney

Larry Wayne Thompson

Richard A Meador

Melvin E Strahosky

A method and device for measuring a property, such as torque, includes a plurality of sensors, and a measuring device. The sensors attach to a downhole apparatus at a distance from one another. The sensors provide signals indicating their positions. A logic circuit may calculate an angle between the sensors. The logic circuit then calculates the property based on the angle, the distance between the sensors, and other known physical properties of the downhole apparatus.

Device and method for measuring a property in a downhole apparatus

Methods and systems for updating and/or predicting statistical reliability for downhole devices. In some embodiments, the statistical reliability for a device may be predicted prior to using the device to ensure the statistical reliability stays above a preset threshold. In other embodiments, the statistical reliability for a device is tracked substantially simultaneously with use, again to ensure its statistical reliability stays above a predetermined threshold.

Method and system for updating reliability prediction models for downhole devices

The invention relates to a marinecraft refrigeration and delivery ice product system having means for the delivery of ice product to remote vertical and horizontal locations in the marinecraft.

Marine ice making and delivery system

An apparatus and method for measuring formation parameters by transmitting and receiving electromagnetic signals by antennas disposed in recesses in a tubular housing member and including apparatus for reducing the coupling of electrical noise into the system resulting from conducting elements located adjacent the recesses and housing. More particularly, a method and apparatus employing electrostatic, but not magnetic, shielding of the low impedance antenna systems and inductive signal coupling to enhance the signal at the receiver is disclosed. This system is capable of measuring formation parameters in the presence of conducting bodies, e.g., the drill string, permitting incorporation of the apparatus in a measuring while drilling (MWD) logging system. In a particular embodiment, high frequency electromagnetic energy is used to measure formation resistivity. Small low impedance coils are arranged in the wall or around the outer circumferential surface of a steel drill collar and spaced from the surface a minimum distance to allow efficient propagation and reception. The low impedance receiver antennas are substantially electrostatically, but not magnetically, shielded and include inductive current coupling devices to further improve the signal. In a preferred embodiment, the coils are circularly configured about the collar and longitudinally spaced thereon to serve as transmitting and receiving elements which together with associated circuit components employ high frequency electromagnetic wave propagation techniques to measure formation parameters. The received signals are phase shifted and amplitude attenuated as they pass through the formation, and formation parameters are determined by detecting variations in travel time and attenuation between longitudinally spaced receivers.

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Houston, TX, United States of America

William R Grayson