Abstract: An antenna system for a downhole tool has an antenna that is configured to operate at a plurality of frequencies. The tuning circuit is on the interior of the tool and shielded from borehole fluids. The tuning circuit is coupled to the antenna by a transformer circuit.

Abstract: An apparatus configured to evaluate an earth formation that includes a tuned transmitter antenna and an untuned broadband receiver antenna. The transmitter antenna being configured to generate electromagnetic energy and the untuned broadband antenna configured to produce an output responsive to the generated electromagnetic energy. The untuned, broadband receiver antenna is configured reduce to reduce tool complexity, antenna coupling, and cross-talk between conductors to the antenna assemblies. The method includes using the apparatus in earth formation evaluation.

Abstract: The present disclosure includes an apparatus and method for operating a downhole tool in a borehole. The apparatus may include a downhole tool that may include at least one second clock, which may be synchronized to a first clock by way of a modulator/demodulator device. The downhole tool may be configured to estimate a parameter of interest of an underground feature. The underground feature may relate to one or more of: a borehole, a casing, or an earth formation. The downhole tool may comprise two or more sections that are configured to operate synchronously when the one or more second clocks are synchronized with the first clock. The modulator/demodulator may include a modem associated with the first clock, a modem associated with the at least one second clock, and a low frequency conductor between the two modems. The method includes using the apparatus.

Abstract: An instrument disposed into a drill string for imaging an earth formation includes: at least one band antenna disposed over an intermediate layer disposed into a groove in an outer surface of the drill string. A method of fabrication is provided.

Abstract: An antenna system for a downhole tool has an antenna that is configured to operate at a plurality of frequencies. The tuning circuit is on the interior of the tool and shielded from borehole fluids. The tuning circuit is coupled to the antenna by a transformer circuit.

Abstract: The disclosure provides a resistivity tool for use in a wellbore, wherein at least two orthogonal antennas are located at the same or substantially the same location of the tool. A single set of vertically aligned grooves is provided for the at least two orthogonal antennas. Each antenna may be configured to operate as a transmitter or receiver. A tool with collocated antennas may be used to provide azimuthally sensitive measurements even if the tool is non-rotating.

Abstract: A unified circuit without using a relay is proposed to resonate an antenna at more than two frequencies. The use of such analog IC switches are common place for transceiver applications in high RF frequencies (500 MHz and above). However, the use of selectively tuned antennas has for the most part been accomplished by the use of latching relays or fixed value components. The IC switch allows for not only the functionality of a single antenna to be either a transmitter and/or a receiver, but also allows, by adding additional switches to select any number of frequencies to resonate the antenna. This frequency resonation could be at fixed frequency points or sweep in either linear or logarithmic steps. The component selection of capacitors for either method would be controlled by a DSP or other microcontroller device. In one embodiment, an antenna for a downhole measurement tool is provided with a tuning circuit couple by a transformer to at least one antenna.

Abstract: An untuned, broadband receiver antenna for an induction or propagation logging tool reduces tool complexity, antenna coupling, and cross-talk between conductors to the antenna assemblies.

Abstract: An instrument disposed into a drill string for imaging an earth formation includes: at least one band antenna disposed over an intermediate layer disposed into a groove in an outer surface of the drill string. A method of fabrication is provided.

Abstract: The disclosure provides a resistivity tool for use in a wellbore, wherein at least two orthogonal antennas are located at the same or substantially the same location of the tool. A single set of vertically aligned grooves is provided for the at least two orthogonal antennas. Each antenna may be configured to operate as a transmitter or receiver. A tool with collocated antennas may be used to provide azimuthally sensitive measurements even if the tool is non-rotating.

Abstract: A resistivity tool has a body with at lest one pair of grooves on its exterior oriented orthogonal to the tool axis. A coil antenna is oriented orthogonal to the grooves in a hole intersecting the grooves and oriented orthogonal to the tool axis. The antenna and an antenna core define a plurality of small antenna loops.

Abstract: A measurement-while-drilling or logging while drilling method and apparatus for determining the azimuth of providing magnetic field in a remote formation layer in the vicinity of a down hole resistivity tool. A cross-component magnetic field with substantially orthogonal transmitter and receiver coils is provided. The coil planes are either substantially orthogonal (coaxial coils) or parallel (transverse coils) with respect to, the longitudinal axis of the tool body. The coils are placed on the tool body having a external surface and a plurality of grooves are cut in the external surface of the tool body and oriented substantially horizontally with respect to the longitudinal axis of the tool body for the coils and oriented vertically with respect to the longitudinal axis of the tool body for the coaxial coils. A transverse and coaxial coil are placed in the grooves for transmission or reception of a cross-component transverse magnetic field.

Abstract: A resistivity tool has a body with at lest one pair of grooves on its exterior oriented orthogonal to the tool axis. A coil antenna is oriented orthogonal to the grooves in a hole intersecting the grooves and oriented orthogonal to the tool axis. The antenna and an antenna core define a plurality of small antenna loops.

Abstract: A measurement-while-drilling or logging while drilling method and apparatus for determining the azimuth of providing magnetic field in a remote formation layer in the vicinity of a down hole resistivity tool. A cross-component magnetic field with substantially orthogonal transmitter and receiver coils is provided. The coil planes are either substantially orthogonal (coaxial coils) or parallel (transverse coils) with respect to, the longitudinal axis of the tool body. The coils are placed on the tool body having a external surface and a plurality of grooves are cut in the external surface of the tool body and oriented substantially horizontally with respect to the longitudinal axis of the tool body for the coils and oriented vertically with respect to the longitudinal axis of the tool body for the coaxial coils. A transverse and coaxial coil are placed in the grooves for transmission or reception of a cross-component transverse magnetic field.

Abstract: Method and assembly for inspecting the contents of a connection box or a utility system such as a sewer, telephone electrical, gas etc. via an inspection plug. The inspection plug provides an inspection port and is insertable into a hole in a panel and is attachable to the panel by fixing elements such as a nut assembly, a locking mechanism, prongs, etc. The inspection plug may include a body, a peripheral shoulder, and a resiliently braced cap pivotally mounted in the body to close the inspection port. The peripheral shoulder supports the plug in place in the panel. The cap normally closes the inspection port, but is yieldably openable to allow an inspection probe or other device to gain access to the internal atmosphere for testing within the utility system or electrical connection box. The interior space of the body may contain a gel material, and the cap can be substituted with a resilient closure member having self-sealing openings therein for receiving an inspection probe.

Abstract: A safety or traffic marker is capable of providing a continuous physical border between two locations. A housing, or one of several adapters, are employed in a conventional traffic cone to dispense an elongated strip of tape therefrom. In one embodiment, the housing is physically incorporated into the interior of the marker, and is adapted for easy insertion and removal of a tape or safety material dispenser. In order to achieve easy insertion of the tape dispenser into the housing, the upper portion of the marker is split into separable sections. Since the marker is fabricated from a deformable material, the upper portion can be manually separated into an opened position for insertion of the tape dispenser therein. Hook and loop fasteners may be used to fasten together the two sections into a closed position. Adapters may also be used in conjunction with conventional traffic markers for creating a continuous physical border between two or more locations.

Abstract: A blanket cleaner for removing dust, lint or ink from a blanket cylinder in an offset printing press during the uninterrupted course of a press run. A first fluid cylinder periodically urges a brush against the blanket cylinder and retracts the brush from the blanket cylinder. Retraction of the brush permits the dust and lint swept before the brush to fall onto a door of a lint catcher. The door is raised and lowered by action of a second fluid cylinder. Operation of the second fluid cylinder lags the operation of the first fluid cylinder by an interval of time sufficient to permit the dust, lint or ink to fall onto the door. In the preferred embodiment, the structure includes a device for removal of debris from the lint catcher.

Abstract: Locking apparatus for bottom connected electrical meters which, in one embodiment, includes a secondary cover over the meter terminal block and intermediate the primary cover and the meter base, the secondary cover being secured to the base by screws which are covered by the primary cover. The secondary cover has an apertured stud thereon which extends through the primary cover and receives a lock to prevent removal of the primary cover. The protruding end of the stud may be covered by an apertured block secured to the primary cover. In a second embodiment, the stud is omitted, and the lock extends through the primary cover and into an opening in the meter base, the lock having a portion which engages the primary cover and prevents removal thereof. In the second embodiment, a detector, such as a switch, within the base and operable by the lock indicates the presence or absence of the lock.

Abstract: Protecting and sealing cap for the open end of a ferrule, such as a ferrule at the key receiving end of a lock, with a pair of opposed openings through the wall thereof. The cap is cup-shaped with a tubular wall for encircling the ferrule and an end wall at one end of the tubular wall. A stem projects from the end wall toward the opposite end of the tubular wall and engages with a retainer inserted through the ferrule openings so that the cap cannot be removed without fracturing the cap or the retainer. Several stem, cap and retainer configurations are disclosed, and the retainer may be secured to the cap by a flexible cord.

Abstract: A blanket cleaner for removing dust, lint or ink from a blanket cylinder in an offset printing press during the uninterrupted course of a press run. A first fluid cylinder periodically urges a brush against the blanket cylinder and retracts the brush from the blanket cylinder. Retraction of the brush permits the dust and lint swept before the brush to fall onto a door of a lint catcher. The door is raised and lowered by action of a second fluid cylinder. Operation of the second fluid cylinder lags the operation of the first fluid cylinder by an interval of time sufficient to permit the dust, lint or ink to fall onto the door. In the preferred embodiment, the structure includes a device for removal of debris from the lint catcher.