Abstract: A method for attenuating water column reverberations in a dual sensor seismic signal, whereby a pressure signal and a velocity signal are transformed from the time domain to the frequency domain, generating a transformed pressure signal and a transformed velocity signal, respectively. Values for weighting factors K.sub.p and K.sub.v are selected and multiplied times the transformed pressure signal and the transformed velocity signal, respectively, generating a weighted pressure signal and a weighted velocity signal, respectively. The weighted pressure signal and the weighted velocity signal are summed, generating a summed signal. Values for ocean bottom reflectivity R and Z, the frequency domain delay operator for two-way travel time in the water layer, are determined. A weighted inverse Backus filter is calculated and multiplied times the summed signal, generating a filtered signal. The filtered signal is transformed from the frequency domain to the time domain.

Abstract: Seismic survey data is stored in encrypted format in a first memory. The first memory module is transferred to a first computer in a first location. A portion of the seismic survey data is selected using a second computer in the first location, wherein the second computer communicates with a second location. A request authorization is transmitted from the second computer to the second location. A decryption code is transmitted from the second location to the second computer. The decryption code is transferred from the second computer to the first computer. The decryption code is applied to the selected portion of seismic survey data in the first computer, making available seismic survey data in decrypted format.

Abstract: An apparatus for generating signals and energy for transmission to a large mass. The apparatus incorporates a pulsed generator such as a compensated pulsed alternator for storing and for discharging large amounts of energy in a controlled manner for transmission through a vibrator or similar electromechanical device. In the field of seismic exploration, the apparatus discharges seismic source energy into a land mass or water to generate seismic waves which are reflected from the interface between subsurface geologic formations. The pulsed generator permits the seismic source energy to be discharged in a controlled manner to shape the energy signal, and permits large quantities of energy to be discharged to increase the penetration depth and strength of the reflected signals.

Abstract: Marine seismic data sets are generally under-sampled spatially because of the relatively long listening times required in deep water. It is customary to use very long spreads in the field thereby enhancing aliasing and interference from coherent noise. A seismic-signal data processing method is proposed that applies a combination of a forward parabolic Radon transform and a linear Radon transform to the data, followed by a further transform to a three-dimensional frequency domain. In this domain, a deterministic operator is applied to the data to sharpen the Radon-domain response thereof. The data are then scavenged of noise in the Radon domain and inversely transformed back into the time-space domain.

Abstract: Apparatus for handling pipe, coiled tubing, casing, and conventional tubing in well drilling and servicing operations.

Abstract: The invention comprises a method that utilizes a plurality of corrugated panels from used shipping containers to make a web that is then able to be cut into suitable shapes to be used in the construction of corrugated cardboard shipping pallets. The process begins with opening or flattening the used cardboard boxes and then removing the end flaps and opening along the manufacturer's seams to form a plurality of sheets. These sheets are then cut to form a plurality of sheets of uniform widths. A plurality of sheets of the same width are then assembled end to end and face to face, using an overlapping arrangement and a suitable adhesive, to make a multiple thickness corrugated web. This multiple layer web can then be cut by using suitable cutting techniques to make the components of corrugated cardboard shipping pallets. These components, or beams can be wrapped with a layer or layers of corrugated or other suitable material to add strength, moisture resistance or other desired qualities.