Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7612565 | Apparatus and system for well placement and reservoir characterization A resistivity array having a modular design includes a transmitter module with at least one antenna, wherein the transmitter module has connectors on both ends adapted to connect with other downhole tools; and a receiver module with at least one antenna, wherein the... | 11/03/2009 |
| 7594541 | Pump control for formation testing A downhole formation fluid pumping and a sampling apparatus are disclosed that may form part of a formation evaluation while drilling tool or part of a tool pipe string. The operation of the pump is optimized based upon parameters generated from formation pressure t... | 09/29/2009 |
| 7367394 | Formation evaluation while drilling A sampling while drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a drill collar, at least one sample chamber, at least one flowline and at least one cover. The drill collar is operatively connectable to a ... | 05/06/2008 |
| 7348781 | Apparatus for electromagnetic logging of a formation A tool for electromagnetic logging of a formation includes a tool body configured to move in a borehole penetrating the formation; an antenna array disposed on the tool body; and an electronic unit configured to control operation of the antenna array, wherein the an... | 03/25/2008 |
| 7334465 | Integrated logging tool for borehole An apparatus for measuring characteristics of earth formations surrounding a borehole, comprises a resistivity measurement device having a multiplicity of antennae spaced between each other in a longitudinal direction of the apparatus. A neutron measurement device o... | 02/26/2008 |
| 7331223 | Method and apparatus for fast pore pressure measurement during drilling operations A method and apparatus for measuring the pressure of a formation penetrated by a wellbore is provided. A downhole tool is positioned in the wellbore and a probe is extended therefrom into sealing engagement with the formation. A piston in the probe is retracted ther... | 02/19/2008 |
| 7330397 | Electromagnetic anti-jam telemetry tool A mud-pulse telemetry tool includes a tool housing, a motor disposed in the tool housing, and a magnetic coupling coupled to the motor and having an inner shaft and an outer shaft. The tool may also include a stator coupled to the tool housing, a restrictor disposed... | 02/12/2008 |
| 7311142 | Apparatus and method for aquiring information while drilling A downhole tool positionable in a wellbore for penetrating a subterranean formation includes a housing having at least one protuberance extending therefrom. The protuberance has at least one centralizing section and a protective section. A probe is positioned in the... | 12/25/2007 |
| 7309983 | Method for determining characteristics of earth formations A method for determining a characteristic of earth formations from measurements taken on the formations, includes the following steps: producing a data base that includes a multiplicity of data points, each data point representing a stored formation characteristic o... | 12/18/2007 |
| 7303011 | Downhole formation testing tool A downhole tool positionable in a wellbore penetrating a subterranean formation is disclosed. The downhole tool includes a housing, a coring bit and a sample chamber. The coring bit is disposed in the housing and is extendable therefrom for engaging a wellbore wall.... | 12/04/2007 |
| 7302966 | Flow control valve and method A flow control valve includes a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway. A piston is slidably disposed in the passageway between the first and second openings of th... | 12/04/2007 |
| 7301339 | Estimating the concentration of a substance in a sample using NMR A method for estimating a concentration of a substance in a test sample of formation fluid, comprising measuring an NMR parameter of a first sample of formation fluid to obtain a first measurement, adding a known quantity of the substance to the first sample to prod... | 11/27/2007 |
| 7301609 | Measuring sonde for a hydrocarbon well The invention provides a measuring sonde (1) for a hydrocarbon well, the sonde comprising a main body (2), a downstream arm (3), and an upstream arm (5), at least one of said arms being fitted with measurement means (6) for determi... | 11/27/2007 |
| 7298147 | Device and process for determination of the resistivity of a formation surrounding a cased borehole Body (22) for measuring the resistivity of a formation (9) surrounding a well (10) equipped with a lining (11), comprising: a body (23) of a probe (22), a set of three primary voltage measurement electrodes (ea, eb, ec), an ... | 11/20/2007 |
| 7298285 | Rotary downlink system A method for downlink communication with a downhole tool having a mud-powered downhole motor that includes receiving a sensor signal related to a rotational speed of a rotor in the mud-powered downhole motor, and interpreting the sensor signal to derive a downlink s... | 11/20/2007 |
| 7284607 | System and technique for orienting and positioning a lateral string in a multilateral system A technique that is usable with a subterranean well that has a first string that lines a borehole includes running a second string into the well and engaging a deflecting face of a deflector to deflect the second string into a window of the first string. The techniq... | 10/23/2007 |
| 7278480 | Apparatus and method for sensing downhole parameters A sensor plug positionable in a perforation extending into a wall of a wellbore penetrating a subterranean formation is provided. The sensor plug includes a plug sleeve disposable in a perforation extending through the wellbore wall, a pin positionable in the plug s... | 10/09/2007 |
| 7242194 | Formation imaging while drilling in non-conductive fluids A resistivity tool for investigating a wall of a borehole drilled with a non-conductive mud includes a tool body adapted to be incorporated in a logging-while-drilling tool assembly; a resistivity sensor disposed on the tool body, wherein the resistivity sensor comp... | 07/10/2007 |
| 7230542 | Streamlining data transfer to/from logging while drilling tools The invention provides a more efficient way to transfer data to or from a logging tool during a drilling process. A memory module is provided for rapid insertion and retrieval from a logging while drilling tool between drilling runs. The memory module records and st... | 06/12/2007 |
| 7198102 | Automatic downlink system A downlink system that includes at least one mud pump for pumping drilling fluid from a drilling fluid storage tank to a drilling system, a standpipe in fluid communication with the mud pump and in fluid communication with the drilling system, and a return line in f... | 04/03/2007 |
| 7187297 | Methods for sealing openings in tubulars Systems and methods for downhole communication and measurement utilizing an improved metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a run-in tool. The tubular including slotted stations to provide through-tubular s... | 03/06/2007 |
| 7168507 | Recalibration of downhole sensors In downhole drilling tools, a first set of inexpensive and/or relatively small sensors that typically have lower accuracy and higher drift than conventional downhole sensors are located in the drill string adjacent to the bit. A second set of highly accurate sensors... | 01/30/2007 |
| 7168510 | Electrical transmission apparatus through rotating tubular members The present invention provides an apparatus for the communication of power or data signals across the rotating gap of two tubular members, such as the stator and rotor of a mud motor, and between said rotating members of a drill string through inductive couplers loc... | 01/30/2007 |
| 7154411 | Reservoir management system and method A remote sensing unit for sensing subsurface formation is provided. The remote sensing unit is an active device with the capability of responding to control commands to determine subsurface formation characteristics, and transmitting corresponding data values. Some ... | 12/26/2006 |
| 7136795 | Control method for use with a steerable drilling system A control method for use with a steerable drilling system comprises the steps of inputting parametric model data representative of drilling conditions and using the data to determine achievable drilling directions. ... | 11/14/2006 |
| 7133325 | Apparatus and method for generating electrical power in a borehole An apparatus and related method generate electrical power in a tubular housing, such as a drill collar, disposed in a borehole when drilling fluid flows through the tubular housing. The apparatus includes a stator adapted for being secured within the tubular housing... | 11/07/2006 |
| 7113051 | Frequency characterization of quartz crystals Techniques for determining a frequency profile of a quartz crystal in real time. Quartz crystals are subjected to a series of temperature cycles at various temperature rates and the crystal frequencies, crystal temperature parameters, and the temperature rates are m... | 09/26/2006 |
| 7086485 | Directional casing drilling A directional drilling system, including a casing string, a casing latch disposed inside the casing string proximate a lower end of the casing string and coupled to the casing string, a rotary steerable system disposed inside the casing string and coupled to the cas... | 08/08/2006 |
| 7083008 | Apparatus and method for pressure-compensated telemetry and power generation in a borehole An apparatus and related method are useful for compensating the pressure of drilling fluid in a drill collar disposed in a borehole. The apparatus includes a stator adapted for being secured within the drill collar against rotation relative to the drill collar, and ... | 08/01/2006 |
| 7058512 | Downhole rate of penetration sensor assembly and method Methods and apparatuses to determine the rate of penetration of a subterranean drilling assembly into a formation are disclosed. The methods and apparatuses generate rate of penetration by integration axial acceleration data with respect to time and applying a corre... | 06/06/2006 |
| 7021385 | Method and apparatus for controlling well pressure in open-ended casing A system and method for preventing blowouts during the deployment of a casing string into a wellbore. The system includes securing a casing coupling to a casing string and securing a retrievable check valve within the casing coupling. The retrievable check valve all... | 04/04/2006 |
| 7013217 | System and method for determining formation slowness The invention provides techniques for calculating velocity from sonic signals with an improved signal to noise ratio, accuracy and certainty of result. Multichannel coherence measures are calculated from sonic transmitter signals and averaged to produce an average c... | 03/14/2006 |
| 7004263 | Directional casing drilling A directional casing drilling system including a casing string for rotation of a drill bit, a shaft coupled to the casing string, and a sleeve having pads that are hydraulically extensible. The sleeve may be positioned about a portion of the shaft. The invention may... | 02/28/2006 |
| 6998998 | High speed hazardous area communication with safety barriers A method and apparatus is disclosed for transmitting digital signals across safety transmission barrier. High data transfer rates are achieved for transfer from a safe certified device across the transmission barrier to a standard or non-rated device. A signal pair ... | 02/14/2006 |
| 6995684 | Retrievable subsurface nuclear logging system Systems and methods utilizing an elongated sub body adapted to receive a run-in tool within its inner bore. The run-in tool including nuclear sources and sensors to provide nuclear formation evaluation while tripping. The nuclear sources and sensors align with parti... | 02/07/2006 |
| 6993446 | Method and apparatus for predicting the time to failure of electronic devices at high temperatures A method and apparatus are disclosed for determining a time to failure for an electronic device. The method and apparatus includes estimating a dependency of a bond strength degradation rate on at least one parameter and estimating a temperature profile of the elect... | 01/31/2006 |
| 6963803 | System and method for analyzing a thin bed formation One or more high resolution logs of a formation property having thin beds is provided for the laminated formation. From this log, the bed boundaries are detected and the facies for each of the beds detected is identified, using one or more high resolution logs of th... | 11/08/2005 |
| 5281836 | Semiconductor sensor with perpendicular N and P-channel MOSFET's The invention relates to sensors having field effect semiconductors. The sensor of the invention comprises a ring oscillator constituted by an odd number of CMOS inverters disposed in a zone sensitive to the physical property to be measured. In order to i... | 01/25/1994 |
| 5257643 | Dry hydrant A dry (unpressurized) hydrant utilizes a hydrant pipe formed from PVC. One end engages a sliding swivel mount attached to a post with the other end of the pipe being free to swing and to be placed within a nearby body of water. The free end may include a ... | 11/02/1993 |
| 5257537 | Self actuating throttle valve A self-actuating throttle valve for use with fluid measurement apparatus such as a water meter. The valve includes a cylindrical body disposed within the outlet of the fluid measuring apparatus, fluid bypass openings formed in the body to enable fluid to ... | 11/02/1993 |
