Abstract: A memory logging system for determining the status of a sliding sleeve valve disposed within the borehole. The sliding sleeve contains signal inducing devices. A logging tool is conveyed through the sliding sleeve and time intervals between sensor excursions induced by the sleeve's signal inducing devices are recorded and stored within the tool memory. These data are subsequently recovered when the tool is returned to the surface of the earth, and sensor excursion data are processed in a surface processor to ascertain relative axial positions of the sliding sleeve outer housing and the insert. The condition of the sliding sleeve is determined from these relative axial positions.

Abstract: A memory logging system for determining the status of a sliding sleeve valve disposed within the borehole. The sliding sleeve contains signal inducing devices. A logging tool is conveyed through the sliding sleeve and time intervals between sensor excursions induced by the sleeve's signal inducing devices are recorded and stored within the tool memory. These data are subsequently recovered when the tool is returned to the surface of the earth, and sensor excursion data are processed in a surface processor to ascertain relative axial positions of the sliding sleeve outer housing and the insert. The condition of the sliding sleeve is determined from these relative axial positions.

Abstract: A resistivity logging apparatus has an array of electrodes projecting from imaging pads. The electrodes penetrate nonconductive mud lining the borehole wall. Some of the electrodes are moveable in and out of the pad while others of the electrodes can be fixed. The electrodes, which are arranged in an array along a circumferential portion of the borehole wall, are able to make contact with the borehole wall. Sequencing electronics causes one electrode to be a source, another to be a measuring electrode, with the measurements of source electrode and measuring electrode moving along the array in order to log a circumferential portion of the borehole wall.

Abstract: The specification discloses a method and apparatus for irradiating foodstuffs. The method comprises the step of exposing a foodstuff to be irradiated to x-rays having energies selected exclusively from the range of below approximately 250 KeV, for a period of time and at at least a first intensity sufficient to provide a desired dose of radiation to the foodstuff. The inventive apparatus comprises, in a first embodiment, a conduit adapted for the movement therethrough of a foodstuff to be irradiated, the conduit having a passageway defined between inlet and outlet ends thereof; means for moving the product to be irradiated through the conduit at at least a first velocity; and at least one x-ray tube disposed within the conduit passageway between the inlet and outlet ends in the path of travel of the foodstuff to be irradiated, the at least one x-ray tube being selectively capable of generating x-rays having energies exclusively in the range of below approximately 250 KeV.