Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8173955 | Methods and apparatus to optically determine velocities of downhole fluids Methods and apparatus to optically determine velocities of downhole fluids are disclosed. Some example methods to determine a velocity of a downhole fluid include exciting a fluorescent substance in a downhole fluid with an optical signal via an optical interface. T... | 05/08/2012 |
| 8143570 | Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation The invention relates to methods and apparatus for determining a downhole parameter in an underbalanced drilling environment which include: selectively activating a first fluid flowing from the formation through a wellbore while under balanced drilled; detecting the... | 03/27/2012 |
| 8138471 | X-ray backscatter device for wellbore casing and pipeline inspection An apparatus for inspection in situ of a wellbore casing and a pipeline from inside the wellbore or pipeline. The apparatus includes a penetrating radiation source such as x-rays, a rotatable beam collimator adapted to collimate the penetrating radiation source and ... | 03/20/2012 |
| 8076634 | Neutron shielding for downhole tool A downhole tool for performing measurement of a formation. The tool comprising a housing surrounding a source for generating neutrons and a detector for detecting the neutrons. A shield is located outside of, or embedded in, the housing and focuses the neutrons.... | 12/13/2011 |
| 8071937 | Methods, systems, and computer program products for measuring the density of material including a non-nuclear moisture property detector The subject matter described herein includes methods, systems, and computer program products for measuring the density of a material. According to one aspect, a material property gauge includes a nuclear density gauge for measuring the density of a material. The nuc... | 12/06/2011 |
| 8039793 | Water detection and 3-phase fraction measurement systems Methods and apparatus enable monitoring a hydrocarbon well for water within a flow stream of the well. A water detector includes a light source for emitting into a flow stream infrared light that includes a water absorbent wavelength band. A detector detects attenua... | 10/18/2011 |
| 8039792 | Wide band gap semiconductor photodetector based gamma ray detectors for well logging applications A gamma ray detector uses a scintillation detector having a response that matches a response characteristic of a photodiode. The detector may be used to measure natural gamma rays and/or gamma rays produced by interaction of neutrons from a neutron source with the e... | 10/18/2011 |
| 8039791 | Downhole fluid spectroscopy An example method for determining a partial density of a compound in a downhole fluid may comprise exposing the downhole fluid to an electromagnetic radiation, and measuring a spectrum of radiation absorption by the downhole fluid. An absorption peak of the compound... | 10/18/2011 |
| 7960687 | Sourceless downhole X-ray tool Systems, methods, and devices relating to a sourceless X-ray downhole tool are provided. By way of example, such a downhole tool may include an X-ray generator, an X-ray detector, and data processing circuitry. The X-ray generator may emit some X-rays out of the dow... | 06/14/2011 |
| 7928360 | Methods, systems, and computer program products for measuring the density of material including a non-nuclear moisture property detector The subject matter described herein includes methods, systems, and computer program products for measuring the density of a sample construction material. According to one aspect, a nuclear density gauge is disclosed for measuring the density of a sample construction... | 04/19/2011 |
| 7834312 | Water detection and 3-phase fraction measurement systems Methods and apparatus enable monitoring a hydrocarbon well for water within a flow stream of the well. A water detector includes a light source for emitting into a flow stream infrared light that includes a water absorbent wavelength band. A detector detects attenua... | 11/16/2010 |
| 7807962 | Borehole tester apparatus and methods for using nuclear electromagnetic radiation to determine fluid properties Apparatus and methods for determining one or more fluid parameters of interest by irradiating fluid with a source of nuclear electromagnetic radiation and subsequently measuring attenuation and absorption properties of the fluid from which parameters of interest are... | 10/05/2010 |
| 7763845 | Downhole navigation and detection system A photodiode whose long-wavelength cutoff is in the short-wavelength range (preferably, between ultraviolet and yellowish-green) having reduced temperature sensitivity is used in downhole applications. It may be matched with scintillation devices having an output ma... | 07/27/2010 |
| 7700910 | Method of compensating a density log A method of compensating a density log comprises the step of compensating the far density by adding a correction at a given point in the density log wherein: (a) the correction comprises at least a first correction function and optionally a second correction functio... | 04/20/2010 |
| 7687770 | Methods and apparatus for multi dimension fluorescence spectrum measurement downhole Some principles described herein contemplate implementation of downhole imaging for the characterization of formation fluid samples in situ, as well as during flow through production tubing, including subsea flow lines, for short term investigation, permanent, and/o... | 03/30/2010 |
| 7687769 | Methods and apparatus for multi dimension fluorescence spectrum measurement and correlations downhole Some principles described herein contemplate implementation of downhole imaging for the characterization of formation fluid samples in situ, as well as during flow through production tubing, including subsea flow lines, for short term investigation, permanent, and/o... | 03/30/2010 |
| 7675029 | Apparatus and a method for visualizing target objects in a fluid-carrying pipe An apparatus for recording and displaying images of and identifying material types in a target object in a fluid carrying conduit includes a downhole unit. The downhole unit includes a controllable light source, the controllable light source structured to emit high ... | 03/09/2010 |
| 7675030 | Logging system and method for in-situ fluids sensing through optical fiber with attenuation compensation A method for optically sampling characteristics of subsurface fluids within a wellhole using continuous, non-pulsed light transmitted downhole in optical fibers for both sampling and reference light channels for accurate attenuation compensation. ... | 03/09/2010 |
| 7638761 | High temperature downhole tool Apparatus and method for estimating a downhole parameter include a high-gain semiconductor device having a plurality of semiconductor layers forming an active region, the active region having a bandgap offset that provides device operation through at least the tempe... | 12/29/2009 |
| 7635838 | Methods and apparatus for exploring geological formations utilizing strontium measurements Formation strontium concentrations are measured utilizing a borehole tool. A log may be provided as a function of depth or distance. The strontium measurements can be correlated chronostratigraphically to provide a depth to absolute time correlation. Measures of str... | 12/22/2009 |
| 7615741 | Determining organic carbon downhole from nuclear spectroscopy Elemental analysis of an earth formation is obtained using measurements from a gamma ray logging tool. From the elemental analysis, an estimate of the Calcium, Magnesium and Carbon content of the formation is determined. The amount of organic carbon in the formation... | 11/10/2009 |
| 7601950 | System and method for downhole optical analysis A method for measuring optical properties of a fluid downhole, the method comprising measuring intensity of light interacting with the fluid downhole for each of one or more wavelengths; integrating each intensity of light for each wavelength for an integration time... | 10/13/2009 |
| 7573027 | Measurement of standoff corrected photoelectric factor A photoelectric factor (PEF) that is corrected for standoff effects is obtained from measurements made with a single detector. A first PEF is obtained using a first pair of soft and hard windows and a second PEF is obtained using a second pair of soft and hard windo... | 08/11/2009 |
| 7569810 | Methods, systems, and computer program products for measuring the density of material Methods, systems, and computer program products for measuring the density of material. According to one aspect, a nuclear density gauge is disclosed for measuring the density of a sample construction material. The gauge includes a radiation source positioned in an i... | 08/04/2009 |
| 7534995 | Device for examining rotor drilled holes A probe for inspecting an anchor borehole has a video head provided with a color CCD sensor, a lens, a conical viewing window, and light-emitting diode for illuminating and optically scanning a borehole surface. The probe also has a travel sensor, an electronics mod... | 05/19/2009 |
| 7507952 | Apparatus and method for fluid density determination A fluid density determination apparatus and method comprising an X-ray generator emitting a high energy radiation signal and a low energy radiation signal; a sample cell housing a sample of interest and at least one of the high energy and low energy radiation signal... | 03/24/2009 |
| 7446308 | Method of calibrating multi-channel nuclear energy spectra Measurements made with a nuclear logging tool are partitioned into bins to provide an energy spectrum. The energy spectrum is calibrated by maximizing a measure of similarity with a reference spectrum. ... | 11/04/2008 |
| 7439494 | Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and o... | 10/21/2008 |
| 7439495 | Nuclear imaging probe A nuclear imaging probe 1 for measuring the density of a subsurface formation GF in a limited zone surrounding a well-bore hole WBH. The probe comprises: a pad 2 having a face arranged so as to be positioned in contact with a well-bore wall WBW, at lea... | 10/21/2008 |
| 7423258 | Method and apparatus for analyzing a downhole fluid using a thermal detector The present invention provides a method and apparatus for estimating a property of a fluid downhole by exposing the fluid to modulated light downhole and sensing changes in intensity of infrared radiation from the downhole fluid to estimate the property of the downh... | 09/09/2008 |
| 7379180 | Method and apparatus for downhole spectral analysis of fluids A fluid analysis system for use downhole comprises an input light signal that is directed through a fluid sample housed in a sample cell. The input light signal may originate from a plurality of light sources. An output light signal from the sample cell is then rout... | 05/27/2008 |
| 7372018 | Determination of gas pressure and saturation simultaneously A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pr... | 05/13/2008 |
| 7372264 | Contamination estimation using fluid analysis models Methods and systems are described for estimating of the level of contamination of downhole fluid using physical property measurements, and mathematical modeling of contamination functions and fluid property mixing laws. The proposed approaches enable computation of ... | 05/13/2008 |
| 7365308 | Measurement of formation gas saturation in cased wellbores using pulsed neutron instrumentation A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pr... | 04/29/2008 |
| 7361887 | Measurement of formation gas pressure in cased wellbores using pulsed neutron instrumentation A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pr... | 04/22/2008 |
| 7361886 | Corrections of gamma-ray responses System and method for formation logging using a gamma-ray detector. The techniques including acquiring gamma-ray signals using the gamma-ray detector, the acquired gamma-ray signals having energies that span at least a first-energy region and a second-energy region,... | 04/22/2008 |
| 7355707 | Systems and methods for analyzing dew in a system of interest A system and method and for analyzing dew in a system of interest are provided. A representative method comprises receiving infrared information corresponding to a degree of polarization of dew in a particular environment, and using the degree of polarization to det... | 04/08/2008 |
| 7352844 | Method and system for automatically scanning and imaging the contents of a moving target The system and method described herein facilitate back-to-back automatic scanning of moving vehicles without have the vehicles stop in the scanning zone. The system includes a scanning zone that comprises a radiation source and a radiation source detector. The syste... | 04/01/2008 |
| 7349878 | Simulation method and system for the valuation of derivative financial instruments A Monte Carlo system and method are presented for the pricing of financial instruments such as derivative securities and for assisting a user in making an investment decision using the output of the system and method. A path-integral approach is described that relie... | 03/25/2008 |
| 7339657 | Low-cost on-line and in-line spectral sensors based on solid-state source and detectors combinations for monitoring lubricants and functional fluids A series of optical spectral sensors is based on a combination of solid-state sources (illumination) and detectors housed within an integrated package that includes the interfacing optics and acquisition and processing electronics. The focus is on low cost and the f... | 03/04/2008 |
