Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7748265 | Obtaining and evaluating downhole samples with a coring tool Samples of hydrocarbon are obtained with a coring tool. An analysis of some thermal or electrical properties of the core samples may be performed downhole. The core samples may also be preserved in containers sealed and/or refrigerated prior to being brought uphole ... | 07/06/2010 |
| 7500388 | Method and apparatus for in-situ side-wall core sample analysis A wireline-conveyed side-wall core coring tool for acquiring side-wall core from a geological formation for performing in-situ side-wall core analysis. The coring tool has a core analysis unit operable to measure geophysical properties of an acquired side-wall core.... | 03/10/2009 |
| 7472588 | Petrophysical fluid flow property determination A method and apparatus for determining petrophysical parameters within a geologic formation pressurizes a geologic sample through a set of predetermined effective pressures, energizes the sample at each predetermined effective pressure with an electric current and/o... | 01/06/2009 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 7363206 | Compositional modeling and pyrolysis data analysis methods Methods for processing pyrolytic characterizing data (pcd) from reservoir rock samples obtained from known geographical locations under circumstances that are encountered during the drilling of wells provide information that is important for assessing the relative a... | 04/22/2008 |
| 7334652 | Roller cone drill bits with enhanced cutting elements and cutting structures Roller cone drill bits are provided with cutting elements and cutting structures optimized for efficient drilling of soft and medium formations interspersed with hard stringers. The cutting elements and cutting structures may be satisfactorily used to drill downhole... | 02/26/2008 |
| 7168508 | Logging-while-coring method and apparatus A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wir... | 01/30/2007 |
| 7153688 | Rock assay for predicting oil or gas in target reservoirs The present invention relates to assays for ascribing catalytic activity to rock samples by virtue of zero-valent transition metals potentially being present within the sample. Embodiments of the present invention are generally directed to novel assays for measuring... | 12/26/2006 |
| 7111681 | Interpretation and design of hydraulic fracturing treatments Solutions for the propagation of a hydraulic fracture in a permeable elastic rock and driven by injection of a Newtonian fluid. Through scaling, the dependence of the solution on the problem parameters is reduced to a small number of dimensionless parameters. ... | 09/26/2006 |
| 7059404 | Variable intensity memory gravel pack imaging apparatus and method An apparatus and method are provided for varying an operating parameter for a nuclear gamma ray tool for evaluating the integrity of gravel packing. The gamma ray outpat intensity and area of investigation are altered by changing a source housing geometry and the ma... | 06/13/2006 |
| 7035778 | Method of assaying downhole occurrences and conditions A method of assaying work of an earth boring bit of a given size and design including establishing characteristics of the bit of given size and design. The method further includes simulating a drilling of a hole in a given formation as a function of the characterist... | 04/25/2006 |
| 7031841 | Method for determining pressure of earth formations A method for determining formation pressure at a depth region of formations surrounding a borehole, including: keeping track of the time since cessation of drilling at the depth region; deriving formation permeability at the depth region; causing wellbore pressure t... | 04/18/2006 |
| 7008793 | Method and device for taking a sample of an emulsion circulating in a line The present invention is intended to take a sample of an emulsion circulating in a line. The emulsion is momentarily diverted from the main circulation line 1 thereof to a bypass line 2. By restoring circulation of the emulsion in main line 1, a... | 03/07/2006 |
| 6994164 | Method for enhancing the stability of a water sensitive, reactive subterranean formation The current invention provides a method for enhancing the formation stability of water sensitive, reactive formations penetrated by a wellbore. The method of the current invention provides an accurate evaluation of the impact of cementing fluids on water sensitive, ... | 02/07/2006 |
| 6986281 | Exfiltrometer apparatus and method for measuring unsaturated hydrologic properties in soil Exfiltrometer apparatus includes a container for holding soil. A sample container for holding sample soil is positionable with respect to the container so that the sample soil contained in the sample container is in communication with soil contained in the container... | 01/17/2006 |
| 6912898 | Use of cesium as a tracer in coring operations A method for measuring the infiltration of coring fluid into a core sample taken from a formation comprises a) providing a coring fluid containing cesium in a first concentration, b) using the coring fluid and a coring means to generate the core sample, c) determini... | 07/05/2005 |
| 6910535 | Method for enhancing the stability of a water sensitive, reactive subterranean formation The current invention provides a method for enhancing the formation stability of water sensitive, reactive formations penetrated by a wellbore. The method of the current invention provides an accurate evaluation of the impact of cementing fluids on water sensitive, ... | 06/28/2005 |
| 6860147 | Process for predicting porosity and permeability of a coal bed A method for predicting the secondary porosity system (SPS) porosity, and thereby permeability, of a coal bed involves determining an initial condition in the coal bed, including an initial SPS pressure and an initial sorbed gas composition, determining a pressure s... | 03/01/2005 |
| 6247358 | Method for the evaluation of shale reactivity Shale reactivity is evaluated by testing a preserved test plug of shale sample in a triaxial test machine, the test plug being prepared by collecting a downhole shale sample and keeping it all times immersed in a preserving mineral oil so as to avoid dehy... | 06/19/2001 |
| 6166546 | Method for determining the relative clay content of well core A method for determining a relative clay content of at least a portion of a well core taken from a subterranean geologic formation by: determining the relationship of the clay content of the well core portion to the dielectric constant of the well core po... | 12/26/2000 |
| 5866814 | Pyrolytic oil-productivity index method for characterizing reservoir rock Data from the pyrolytic analysis of rock samples obtained from drilling operations in an existing oil field are used to characterize the quality and condition of reservoir rock by comparison of the values of an index for the unknown reservoir rock samples... | 02/02/1999 |
| 5828981 | Generating pore types and synthetic capillary pressure curves from wireline logs using neural networks Methods of directly analyzing wireline well logging data to derive pore types, pore volumes and capillary pressure curves from the wireline logs are disclosed. A trained and validated neural network is applied to wireline log data on porosity, bulk densit... | 10/27/1998 |
| 5767399 | Method of assaying compressive strength of rock A method of assaying the compressive strength of rock comprises testing a primary plurality of rock samples of similar lithology, at least some of which have different porosities, to determine, for each sample respectively, a value corresponding to compre... | 06/16/1998 |
| 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 |
| 5741967 | Method for determining optimum horizontal drilling direction and drilling horizon A method for analyzing the microfractures of a sandstone formation is provided which determines an optimal horizontal drilling direction. The microfractures are analyzed with a photomultiplier-based imagining of electron-beam induced luminescence method, ... | 04/21/1998 |
| 5741959 | Portable tester for determining gas content within a core sample A portable tester is provided for reading and displaying the pressure of a gas released from a rock core sample stored within a sealed container and for taking a sample of the released pressurized gas for chemical analysis thereof for subsequent use in a ... | 04/21/1998 |
| 5670717 | Method and device for detecting and/or measuring at least one geophysical parameter from a core sample Method and device for detecting and/or measuring at least one geophysical parameter from a core sample (1), in particular in the oil sector, comprising, during an operation of core drilling with a sampler (2); arranging, substantially fixed relative to th... | 09/23/1997 |
| 5482122 | Oriented-radial-cores retrieval for measurements of directional properties A method for the determination of anisotropic material properties in subterranean rock formations by means of radially oriented and generally equally angularly spaced sidewall cores obtained by use of a rotary sidewall coring tool. The measurement values ... | 01/09/1996 |
| 5335724 | Directionally oriented slotting method A method of fracturing a subterranean formation having a well bore extending thereinto. The method comprises the steps of: (a) placing a jetting tool in the well bore such that the jetting tool is positioned within the subterranean formation, the jetting ... | 08/09/1994 |
| 5328849 | Inclusion composition mapping of earth's subsurface using collective fluid inclusion volatile compositions A collective fluid inclusions volatiles sample is released from each of a plurality of sedimentary rock samples and analyzed as it is being released to determine composition thereof. Compositions are used for mapping the earth's subsurface.... | 07/12/1994 |
| 5325723 | Core sample test method and apparatus A core sample from an oil or gas well can be quickly and easily inserted and removed relative to a reusable sealing sleeve fixed within a test housing wherein the core sample is tested for both longitudinal and lateral strain in response to applied stress... | 07/05/1994 |
| 5277062 | Measuring in situ stress, induced fracture orientation, fracture distribution and spacial orientation of planar rock fabric features using computer tomography imagery of oriented core A method for measuring the azimuthal strike orientation of induced fractures in subterranean formations from which the maximum and minimum in situ stress direction can be inferred. The method utilizes an oriented core of a formation and computed tomograph... | 01/11/1994 |
| 5253719 | Process for diagnosing formation damage mechanism through the use of radially oriented core samples cut from the wellbore wall This invention provides a method for diagnosing formation damage mechanisms through the use of radially oriented core samples cut from the wellbore wall. Core samples are taken from the wellbore and analyzed under a number of different analytical methods.... | 10/19/1993 |
| 5205164 | Methods for determining in situ shale strengths, elastic properties, pore pressures, formation stresses, and drilling fluid parameters A method for determining drilling fluid density for stabilizing a wellbore including obtaining shale cuttings from a wellbore. In one embodiment of a method according to this invention, shale cuttings are obtained from a wellbore and their index propertie... | 04/27/1993 |
| 5201219 | Method and apparatus for measuring free hydrocarbons and hydrocarbons potential from whole core A heating probe and collection assembly is provided for evaluating free hydrocarbons and hydrocarbon potential of whole core. In one embodiment, the one or more assemblies are used with a core transport system to provide measures of hydrocarbon potential ... | 04/13/1993 |
| 5178005 | Sample sleeve with integral acoustic transducers An apparatus is provided for determining the acoustic anisotropy of a sample being subjected to simulated in-situ pressures and/or temperatures. A sample of the formation of interest is received by a compliant sleeve disposed in a pressure chamber. The co... | 01/12/1993 |
| 5134271 | Bar code system used in geophysical exploration The present invention relates generally to a method and system for geophysical exploration and more particularly to a method and system for obtaining selected physical properties of the subterranean formations surrounding a wellbore so as to aid the geoph... | 07/28/1992 |
| 5109697 | Method of exploration for hydrocarbons A method of exploring for hydrocarbons is disclosed wherein core is obtained over substantially the entire length of a well and substantially all lithologies represented within the core are analyzed at a core analysis facility located adjacent the well. A... | 05/05/1992 |
| 5095273 | Method for determining tensor conductivity components of a transversely isotropic core sample of a subterranean formation A transversely isotropic cylindrical core sample of a subterranean formation is fluid saturated and subjected to a confining pressure. Electrical potential is measured along the core sample and in a plurality of direction through the core sample which are... | 03/10/1992 |
| 5093623 | Method for determining electrical anisotrophy from radial resistivities in cylindrical core samples of porous rock A cylindrical core sample of a subterranean formation is fluid saturated and subjected to a confining pressure. Voltages are measured in a plurality of directions through the core sample which are normal to the cylindrical axis of the core sample at a plu... | 03/03/1992 |
