Abstract: An apparatus for perforating an earth formation from a borehole having a housing, a detonator assembly, explosive material for producing the implosion forces and a metal liner of implosive geometry. The detonator assembly includes a predetermined pattern of precision electronic detonators based on exploding foil initiator, exploding bridge wire, spark gap or laser technology to simultaneously produce multiple initiation points of the explosive material for enhancing the implosion forces.

Abstract: This invention discloses a method and apparatus for waterblocking wire-to-wire connections in a cable using an arrangement of seals. Lead-in transmission lines are slid through a multiple-aperture seal to produce a compression seal between the transmission lines and the seal and the trailing transmission line is slid through a single-aperture seal to produce another compression seal. A piece of constrictive tubing is slid over the first seal before splicing the wires in the lead-in and trailing transmission lines together. The tubing then is positioned over both seals to produce a compression seal between the tubing and the seals to form a waterblock in the area defined by the two seals containing the splice.

Abstract: This invention provides a stabilizer for a geophone which reduces the amount of movement of the geophone after deployment in a marine environment subjected to water currents or turbulence. The stabilizer consists of a bulb-shaped body with fin-shaped lobes. An axial cavity for receiving the geophone housing containing the geophone is located at one end of the stabilizer. The other end terminates in a tail designed to promote laminar flow and reduce turbulence coming off the geophone housing and stabilizer. When the geophone is deployed, the stabilizer and attached geophone housing come to rest on a stable, 3-prong base comprised of two adjacent lobes of the stabilizer and the end of the geophone housing opposite the end inserted into the stabilizer.

Abstract: A method and apparatus in marine seismic surveying for towing an optical-electrical towing cable (leadin) and seismic array (streamer cable) at a perpendicular distance from the centerline of the towing vessel using a short, flexible adapter cable section which optically and electrically connects the leadin to the streamer cable and which attaches to pivoting arms of a removable towing bracket which carries the bending loads.

Abstract: The present invention is a method for improving the estimation of physical properties of a material based on the infrared spectrum of the material and the correlation between directly-measured properties of interest and the infrared spectra of a representative set of calibration specimens of the material. By intentionally introducing spectral distortion such as transmittance shifts, wavelength shifts, absorbance-baseline shifts and absorbance-baseline tilts into the infrared spectra of the representative specimens and then determining the correlation between the distorted spectra and the directly-measured properties before applying the correlation to the infrared spectrum of the sample being analyzed, the correlation is self-compensating for the types of distortion introduced.

Abstract: The present invention is a method for improving the estimation of physical properties of a material, based on the infrared spectrum of the material, by concatenating additional data obtained from other measurement techniques to the infrared spectrum to fill the voids in the spectral data resulting from a lack of sensitivity by infrared spectrometers to trace compounds in the material. The augmented spectral data then is used to produce a calibration model for estimating the physical properties of the material.

Abstract: "A method and apparatus for automated, non-destructive permeability determination of a whole-core reservoir rock sample from pressure and time measurements taken as a known volume of pressurized gas, injected into the sample through a probe, diffuses through the sample in a modified hemispherical flow pattern.