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| Number | Title | Issue Date |
| 6393363 | Method and apparatus for the measurement of the electrical resistivity of geologic formations employing modeling data Provided are a method, a computer program product and a system, to measure characteristics of a geologic formation, such as hydrocarbon reservoirs, that employs modeling data to remove unwanted information from a signal carrying information concerning the... | 05/21/2002 |
| 6389367 | Method and apparatus for calibrating readings of a downhole tool A method and apparatus for calibrating readings of a downhole tool are provided. The method including collecting data representative of gamma ray photon energies detected by a downhole tool during the well-logging, a spectrum of the gamma ray photon energ... | 05/14/2002 |
| 6380744 | Shielding apparatus for selective attenuation of an electromagnetic energy field component A shield apparatus for use in conjunction with a well tool to selectively attenuate one or more electromagnetic energy field components as the components interact with the shield. The shield composed of a flexible strip or conductive body and comprising a... | 04/30/2002 |
| 6354373 | Expandable tubing for a well bore hole and method of expanding An expandable tubing (12) for a well bore hole (14) in which selected length portions (24, 26, 28) are weakened by a slot configuration (FIGS. 2, 3, 4) to obtain predetermined expansion characteristics. The slot configurations are tailored or selected for... | 03/12/2002 |
| 6351127 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component A shield apparatus for use in conjunction with a well tool to selectively attenuate one or more electromagnetic energy field components as the components interact with the shield. The shield composed of a flexible strip or conductive body and comprising a... | 02/26/2002 |
| 6315052 | Method and a device for use in coiled tubing operations In a method for use in coilable tubing operations, such as onshore and offshore drilling for oil/gas, a coilable tubing (34) is used. The coilable tubing (34) is coiled up on a drum (36) and uncoiled therefrom by means of a feed-in and feed-out injector (... | 11/13/2001 |
| 6308137 | Method and apparatus for communication with a downhole tool An apparatus for communication with a downhole tool includes uphole and downhole equipment. The uphole equipment includes a signal source (or array) coupled to a programmable triggering system and a precision clock. Optionally, the uphole equipment may in... | 10/23/2001 |
| 6304086 | Method and apparatus for evaluating the resistivity of formations with high dip angles or high-contrast thin layers A method and apparatus for evaluating the resistivity of earth formations surrounding a borehole, particularly high-contrast thin-layer formations or at high dip angles. The method involves positioning a pair of transmitters and a pair of receivers within... | 10/16/2001 |
| 6300762 | Use of polyaryletherketone-type thermoplastics in a production well The present invention relates generally to the use of polyaryletherketone-based thermoplastic materials in high pressure, high temperature, production logging applications. A polyaryletherketone resin bonded with glass fibers is formed into a housing for ... | 10/09/2001 |
| 6294917 | Electromagnetic induction method and apparatus for the measurement of the electrical resistivity of geologic formations surrounding boreholes cased with a conductive liner Provided is a technique, including a method and a computer program product, to dynamically measure characteristics of geologic formations while hydrocarbons are being extracted therefrom. Specifically, the present invention allows measuring the resistivit... | 09/25/2001 |
| 6289283 | Downhole tool data correction method and apparatus A method and apparatus are provided for correcting gamma ray data representative of gamma ray energies for spectral degradation. The method and apparatus include degrading reference gamma ray spectra. At least one correction factor is calculated between t... | 09/11/2001 |
| 6002257 | Method and apparatus for well bore hole-finding with simultaneous borehole or formation sensing A method and apparatus for navigating a tool string down a subsurface borehole to its intended location while simultaneously measuring or sensing the borehole environment, electrically, acoustically, mechanically, or by nuclear means, for a characteristic... | 12/14/1999 |
