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| Number | Title | Issue Date |
| 5811308 | Method for determining petroleum characteristics of geologic sediments The present invention relates to a method for determining at least one petroleum characteristic of a geologic sediment sample heated in a non-oxidizing atmosphere and an oxidizing atmosphere. The sample is heated to a first temperature value below 200° C... | 09/22/1998 |
| 5801061 | Method for the colorimetric determination of analytes in the presence of interfering particulate materials The present invention involves a unitized dry reagent test device and method for removing the interference caused by suspended particulate materials in the calorimetric determination of analytes in samples containing such materials. More specifically, the... | 09/01/1998 |
| 5786225 | Method for evaluating a pollution characteristic of a soil sample A method of evaluating at least on type of pollution characteristic in a soil sample contaminated by hydrocarbon compounds, a method wherein the soil sample is first heated in a non-oxidizing atmosphere, then in an oxidizing atmosphere. The method compris... | 07/28/1998 |
| 5759859 | Sensor and method for detecting trace underground energetic materials A subsurface soil contaminant identification system employs a cone penetrometer unit for continuously measuring the concentration of energetic materials in potentially contaminated soils. The sensor is rugged, reliable, and has a fast response time. The i... | 06/02/1998 |
| 5756357 | Method for detecting hydrocarbons in soil The presence of hydrocarbons in soil is detected by immersing a soil sample in a water-miscible solvent capable of dissolving the hydrocarbons to extract hydrocarbons from the soil into the solvent. An aqueous developer is mixed into the solvent to produc... | 05/26/1998 |
| 5739035 | Detection of alkali-silica reaction swelling in concrete by staining A method using concentrated aqueous solutions of sodium cobaltinitrite and rhodamine B is described which can be used to identify concrete that contains gels formed by the alkali-silica reaction (ASR). These solutions present little health or environmenta... | 04/14/1998 |
| 5663073 | Earth formation porosity estimation method A method for determined porosity of an earth formation surrounding a borehole without prior knowledge of formation lithology. Neutron logging tools are used to measure thermal neutron porosity, epithermal neutron porosity and formation absorption cross se... | 09/02/1997 |
| 5641642 | In situ biofilm coupon device An apparatus for characterization of in-situ microbial biofilm populations in subsurface groundwater. The device permits biofilm-forming microorganisms to adhere to packing material while emplaced in a groundwater strata, so that the packing material can ... | 06/24/1997 |
| 5561065 | Method for testing earth samples for contamination by organic contaminants Provided is a method for testing earth samples for contamination by organic contaminants, and particularly for aromatic compounds such as those found in diesel fuel and other heavy fuel oils, kerosene, creosote, coal oil, tars and asphalts. A drying step ... | 10/01/1996 |
| 5520046 | Process for the chemical logging of a liquid and chemical logging installation for performing said process The invention relates to a process for the chemical logging of a liquid and to an installation for performing the process. An object of the invention is to develop a process which makes it possible to carry out precise cartographies of chemical elements p... | 05/28/1996 |
| 5470749 | Method for determining steam quality using a foaming surfactant Steam quality is measured by mixing the steam with a small amount of surfactant to convert the steam to a stable foam, passing the stable foam through a capillary tube to determine foam quality (volume of vapor per volume of vapor and liquid) by measuring... | 11/28/1995 |
| 5439800 | Offshore petroleum exploration system A system is provided for locating and delineating sea floor occurrences of petroleum seepage, achieved by apparatus for the detection of the resulting abnormal distribution of electrical potential within the affected sediments. The system uses an electric... | 08/08/1995 |
| 5426035 | Method of compensating toxicity test data for the measured toxicity of a reference sample A method for compensating toxicity test data for the measured toxicity of a reference sample by the steps of: a. obtaining toxic response data for a plurality of concentrations of at least two different test samples, including reagent controls having zero ... | 06/20/1995 |
| 5351532 | Methods and apparatus for making chemical concentration measurements in a sub-surface exploration probe An in-hole oil-drilling probe is mountable in a drill string to measure hydrocarbon concentrations in drilling fluid flowing around the drill string. The probe consists of a drill collar which is mountable in the drill string. A solvent, in which hydrocar... | 10/04/1994 |
| 5323648 | Formation evaluation tool A tool for measuring the mechanical properties of a formation through which a borehole has been drilled, comprising a tool body capable of being lowered into a borehole, the tool body having pads mounted on movable arms, each pad carrying a PDC type cutte... | 06/28/1994 |
| 5316950 | Method for quantitative calibration of in situ optical chemical measurements in soils using soil class and characteristics A method assures the quantitative or semiquantitative assessment of analytes in soils by in situ optical methods. A determination is made of the optical chemical response factors for chemicals of interest which are added in known amounts to discrete soil ... | 05/31/1994 |
| 5256572 | Method for determining residual oil saturation of a watered-out reservoir A method for determining residual oil saturation of a watered-out reservoir using two water soluble tracers having different partition coefficients in oil. The partitioning tracers are selected from the group consisting of tritiated or carbon 14 tagged al... | 10/26/1993 |
| 5246862 | Method and apparatus for in-situ detection and determination of soil contaminants A reagent carrying tape is captured between the soil and the outer wall of penetrometer. As the penetrometer moves with respect to the soil, the tape is pressed against an optical window in the penetrometer. Contaminants in the soil reacting with the reag... | 09/21/1993 |
| 4919892 | Apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream An apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream in a sewage system. The apparatus includes a disposable detector which floats in the effluent stream and detects oil and other contaminants having a specific gr... | 04/24/1990 |
| 4900686 | Fluorescent conjugates and biological diagnostic assay There are provided novel fluorescent conjugates comprising a rhodamine dye moiety and a biologically active moiety. In addition, there are provided methods for determining an analyte in a biological fluid.... | 02/13/1990 |
| 4863692 | Apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream An apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream in a sewage system. The apparatus includes a disposable detector which floats in the effluent stream and detects oil and other contaminants having a specific gr... | 09/05/1989 |
| 4857473 | Water sampling system The invention relates to a device for the sampling of liquids which permeate dialysis membranes, comprising cells bounded by two such membranes. The device according to the invention is suited for determining hydrochemical profiles of groundwater, in lake... | 08/15/1989 |
| 4805450 | Method of locating hydrocarbon producing strata and the instrument therefor A cylinder is mounted to descend a borehole for purposes of measuring the mass flow rate of gas flowing upward in the borehole. Within the cylinder is a source of tracer gas which is ejected at a constant mass flow rate [05] from near the lower end of the... | 02/21/1989 |
| 4696903 | Method and apparatus for examining earth formations A method and apparatus are described for logging an open hole well, or the like, for the purpose of determining the presence of a given constituent in the various substrata and for providing means and method for determining the degree of presence of the c... | 09/29/1987 |
| 4681854 | Geochemical oil prospecting method using in situ simulation of diagenetic processes A process for in situ simulation of diagenetic processes in a subterranean formation is provided. A mineral substrate is placed in the formation of interest in a sealed vessel. The vessel is opened so as to expose the mineral substrate to formation fluids... | 07/21/1987 |
| 4646832 | Determining residual oil saturation by injecting salts of carbonic and halocarboxylic acids Residual oil saturation is determined by injecting water containing or contacting dissolved halocarboxylic acid salt and carbonate salt into an oil and water containing reservoir and chromatographically analyzing the patterns of the concentrations of in s... | 03/03/1987 |
| 4537062 | Method and apparatus for investigating the structure and porosity of earth and stony regions This invention provides an understanding of the structure and porosity of soil and stony regions. The method is characterized by release of a measuring gas in the region being investigated and its penetration through the investigated region to several pla... | 08/27/1985 |
| 4369842 | Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature An in situ oil shale retort is formed in a subterranean formation containing oil shale. The retort contains a fragmented permeable mass of particles comprising kerogen and various inorganic carbonates. A processing zone is established in the fragmented ma... | 01/25/1983 |
| 4365507 | Method of determining the depth of occurrence of a chemically aggressive bed A method of determining the depth of occurrence of a chemically aggressive bed in the course of drilling a well with the use of a drilling mud, wherein there is measured preliminarily the value and direction of the redox potential of the drilling mud inje... | 12/28/1982 |
| 4360359 | Method for relating shallow electrical anomalies to the presence of deeper hydrocarbon reservoirs A method is provided for evaluation of shallow electrical anomalies to determine which are likely to be caused by seepage from a hydrocarbon reservoir at depth. The method involves geochemical lithological, and petrographic analyses of anomalous sediments... | 11/23/1982 |
| 4252374 | Determining the locus of a processing zone in an oil shale retort by shale oil composition A processing zone advances through a fragmented permeable mass of particles containing oil shale in an in situ oil shale retort in a subterranean formation containing oil shale. The retort has shale oil passing therefrom. The shale oil contains a constitu... | 02/24/1981 |
