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| Number | Title | Issue Date |
| 7357021 | Methods of monitoring downhole conditions Methods of monitoring various downhole conditions are described, including a system for determining and/or identifying the flow of fluid in a well, determining sand production in a well, identifying localized events in a well, determining the apparent flow velocity ... | 04/15/2008 |
| 7353875 | Centrifugal blending system The present invention relates generally to well servicing operations, and, more particularly, to devices, systems and methods useful in stimulation blending for fluids, mixtures, and/or slurries used in well servicing operations. A device, system and/or method is pr... | 04/08/2008 |
| 7337660 | Method and system for reservoir characterization in connection with drilling operations A method for analyzing reservoir fluids in connection with a drilling operation includes determining composition and isotopes of injection fluids injected into a wellbore during a drilling operation and production fluids recovered from the wellbore during the drilli... | 03/04/2008 |
| 7319965 | Method and apparatus to control the operating speed of a manufacturing facility A method and apparatus for controlling the operating speed of a manufacturing facility is disclosed. It includes determining a desired operating speed that is dependent on at least one economic variable. The variables vary with the operating speed. Also, the operati... | 01/15/2008 |
| 7231819 | Chemical sensor for wellbore applications There is described an analyzing device having two separation units to separate molecular species to detect molecular species in wellbore fluids with both separation units operating under forced flow conditions to provide for an active separation of subterranean well... | 06/19/2007 |
| 7219730 | Smart cementing systems The present invention provides methods and apparatus for determining the location of an apparatus in a wellbore. The method includes lowering the apparatus with a conveying member and measuring a parameter associated with the conveying member. Thereafter, the measur... | 05/22/2007 |
| 7200464 | Digital control servo system An improved servo system for galvanometers, scanners and similar devices which uses digital processing to increase the dynamic range and provide greater effective resolution. The system provides digital control of a reference point that directly influences the excit... | 04/03/2007 |
| 7172020 | Oil production optimization and enhanced recovery method and apparatus for oil fields with high gas-to-oil ratio A method for optimizing oil production rate from an oil well with high gas-to-oil ratio is disclosed to include modeling an Inflow Performance Relationship curve and calculating an optimal level of bottomhole pressure to be higher than zero. Maintaining the bottomho... | 02/06/2007 |
| 7168311 | Fiber optic monitoring of flow inside and outside a tube downhole An apparatus and method for monitoring and characterizing the fluid flow in and around the tubing string in a wellbore, preferably using fiber optic componentry. The apparatus includes a signal sensing demodulator device and a skin friction sensing device positionab... | 01/30/2007 |
| 7155967 | Formation testing apparatus and method A method and apparatus for testing formations surrounding an earth borehole. The method includes the following steps: providing a tool movable through the borehole; providing a flow line in the tool; establishing fluid communication between the formations and the fl... | 01/02/2007 |
| 7131330 | Submersible pump controller An apparatus for improving the service life of a submersible probe residing in a tank includes a liquid level detector adapted to detect when a liquid in the tank rises to a first level. The first level is above the probe. A controller is coupled to the liquid level... | 11/07/2006 |
| 7114386 | Method and apparatus for acquiring data in a hydrocarbon well in production To acquire data such as the flow rate of various phases of a fluid flowing in a hydrocarbon well (12) in production, in particular in an inclined or horizontal portion of the well, both the local speed of the fluid and the proportions of the various phases ar... | 10/03/2006 |
| 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 |
| 7099780 | Method for interpreting data measured in a hydrocarbon well in production The invention concerns a method for calculating the relative volumetric flow-rates of at least one of the phases of a multiphase effluent flowing in a well. Firstly, the local volumetric fractions and/or velocities of the phases across a section of the wall at a cer... | 08/29/2006 |
| 7062420 | Production optimization methodology for multilayer commingled reservoirs using commingled reservoir production performance data and production logging information An overall petroleum reservoir production optimization methodology permits the identification and remediation of unstimulated, under-stimulated, or simply poorly performing reservoir completed intervals in a multilayer commingled reservoir that can be recompleted us... | 06/13/2006 |
| 7032661 | Method and apparatus for combined NMR and formation testing for assessing relative permeability with formation testing and nuclear magnetic resonance testing Formation testing, resistivity and NMR measurements are used concurrently to determine a relative permeability representative of a formation surrounding the borehole. A method and apparatus is provided for accurate determination of the relative permeability for a fo... | 04/25/2006 |
| 7017662 | High temperature environment tool system and method In at least some embodiments, a tool may comprise a tool body and one or more tool components. The tool may further comprise tool electronics located within the tool body, wherein the tool electronics are operable to sense and store tool component characteristics an... | 03/28/2006 |
| 7011155 | Formation testing apparatus and method for optimizing draw down A method and apparatus for of determining a formation parameter of interest. The method includes placing a tool into communication with the formation to test the formation, determining a first formation characteristic during a first test portion, initiating a second... | 03/14/2006 |
| 6992259 | Multi-purpose condensate switch A float switch made from plastic and impervious to corrosion, with improvements over the prior art including a more responsive operation resulting from use of a wide float switch body and a closely fitting housing that allow rapid shut-off of condensate production a... | 01/31/2006 |
| 6968905 | Distributed control system A distributed control system for local or remote control of equipment. The distributed control system provides a communication bridge through a local control panel between a non-real-time network, and a real-time network, such as a controller area network. Both soft... | 11/29/2005 |
| 6951262 | Method and apparatus for suppressing waves in a borehole Methods and apparatus for suppression of wave energy within a fluid-filled borehole using a low pressure acoustic barrier. In one embodiment, a flexible diaphragm type device is configured as an open bottomed tubular structure for disposition in a borehole to be fil... | 10/04/2005 |
| 6941804 | Determining the PVT properties of a hydrocarbon reservoir fluid A method of determining an in situ PVT property of a hydrocarbon reservoir fluid that is present in a hydrocarbon-bearing formation layer traversed by a borehole, which method involves the steps of: a) calculating along the hydroca... | 09/13/2005 |
| 6932167 | Formation testing while drilling data compression A compression scheme for reducing the amount of data that must be transmitted uplink from a formation test while drilling apparatus. Periodic samples are taken within the formation test apparatus and prior to transmitting data uplink, the samples are analyzed to gen... | 08/23/2005 |
| 6923052 | Methods to detect formation pressure Methods for estimating formation pressure from data taken during the drawdown cycle are presented. In one aspect, a method of determining a formation pressure during drawdown of a formation comprises sampling fluid from a formation using a downhole tool having a sam... | 08/02/2005 |
| 6799634 | Tracer release method for monitoring fluid flow in a well A tracer release method for monitoring fluid flow in a well utilizes a deformable container having a liquid tracer material which container has an outlet which debouches into the neck portion of a venturi in a well conduit. The container has a wall which is at least... | 10/05/2004 |
| 6650280 | Measurement system and method System and methods are disclosed for fluid measurements which may be utilized to determine mass flow rates such as instantaneous mass flow of a fluid stream. In a preferred embodiment, the present invention may be utilized to compare an input mass flow to... | 11/18/2003 |
| 6629564 | Downhole flow meter This invention comprises the use of a variable orifice valve as a flow controller and flow meter. Pressure measurements are taken upstream and downstream of the variable orifice valve by way of a differential pressure measurement mechanism. The differenti... | 10/07/2003 |
| 6499344 | Apparatus and method to obtain representative samples of oil well production A well tester adapted to select among members of an oil well family to provide a purged and clean vessel to receive samples of well production that include gas and oil, and by selective use of production pressure and lease water under pressure, allow for ... | 12/31/2002 |
| 6343507 | Method to improve the quality of a formation fluid sample The present invention provides a method for improving the quality of a formation fluid sample by taking the sample at a time when the formation fluid composition contains the most favorable portion of hydrocarbons. This task is accomplished by determining... | 02/05/2002 |
| 6324904 | Miniature pump-through sensor modules Sensor modules are provided which are pumped into a well by first being pumped downhole within a drill string, then passing through the drill bit and being circulated uphole in the annulus between the drill string and the borehole of the well. The sensors... | 12/04/2001 |
| 6301959 | Focused formation fluid sampling probe A formation fluid sampling probe uses two hydraulic lines to recover formation fluids from two zones in a borehole. One of the zones is a guard zone and the other is a probe zone. The guard zone and the probe zone are isolated from each other by mechanica... | 10/16/2001 |
| 6234250 | Real time wellbore pit volume monitoring system and method A system is provided for monitoring in the real time the wellbore pit volume to promptly determine the occurrence of a wellbore kick and take corrective action to minimize fluid influx volume and/or drilling fluid losses. A system includes one or more lev... | 05/22/2001 |
| 6212948 | Apparatus and method to obtain representative samples of oil well production An apparatus and process for obtaining representative samples of fluids produced from one or more oil wells by means of a closed vessel chamber with lease water supply port connected to a lease water supply line, where a pressure sensor within such intern... | 04/10/2001 |
| 6178815 | Method to improve the quality of a formation fluid sample The present invention provides a method for improving the quality of a formation fluid sample by taking the sample at a time when the formation fluid composition contains the most favorable portion of hydrocarbons. This task is accomplished by determining... | 01/30/2001 |
| 6176129 | Method and apparatus for acquiring data in a hydrocarbon well In a hydrocarbon well, a speed measurement is performed at substantially the same level as a determination of the proportions of the phases of the fluid flowing along the well in at least one local region. To this end, local sensors are placed on the hing... | 01/23/2001 |
| 6028307 | Data acquisition and reduction method for multi-component flow A method of determining a holdup value for a multiphase fluid. A first holdup component is calculated using a first detection technique which is insensitive to small inclusions of a first fluid constituent (hydrocarbons) dispersed in a second fluid consti... | 02/22/2000 |
| 5955666 | Satellite or other remote site system for well control and operation The downhole portion of the system of the present invention provides entirely downhole methods and apparatus for the monitoring and control of wells. The components of the system are modular. There are sensor and control valve components located in each o... | 09/21/1999 |
| 5831156 | Downhole system for well control and operation A downhole, modular, well-monitoring and control system is disclosed for use as a stand alone system capable of being left unconnected to the surface in a cased and completed well borehole. Annular shaped interchangeably connected modules, each having a c... | 11/03/1998 |
| 5744709 | Measurement of specific interfacial areas of immiscible fluid interfaces in flow systems This invention relates generally to methods of measuring interfacial areas, and more specifically to flow-based methods for measuring the area of the interfaces between two immiscible fluids. The immiscible fluids of interest are various oils and gases th... | 04/28/1998 |
| 5736637 | Downhole multiphase flow sensor A system for evaluating multiphase flow of a fluid downhole in a borehole. Dielectric permittivity electrodes generate a capacitance output signal through the fluid, and conductivity electrodes generate a conductivity output signal through the fluid. The ... | 04/07/1998 |
