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| Number | Title | Issue Date |
| 8069716 | Multi-coupling reduced length measure while drilling apparatus A downhole drilling apparatus for measure while drilling including a housing defining a longitudinal housing axis, wherein the housing has an upper end and a lower end. A motor includes a rotor, wherein the rotor is adapted to be driven by drilling fluids. A first d... | 12/06/2011 |
| 8015868 | Formation evaluation using estimated borehole tool position Caliper measurements made during rotation of an imager on a logging string are processed to estimate the location of the imager, and size and shape of the borehole. A piecewise elliptical fitting procedure may be used. These estimates may be used to correct measurem... | 09/13/2011 |
| 7571643 | Apparatus and method for downhole dynamics measurements Aspects of this invention include a rotary steerable steering tool having a sensor arrangement for measuring downhole dynamic conditions. Rotary steerable tools in accordance with this invention include a rotation rate measurement device disposed to measure a differ... | 08/11/2009 |
| 7434457 | Fluid property sensors Micro-Electro Mechanical Systems (MEMS) based fluid sensors adapted to measure physical properties of oilfield reservoir fluids under downhole conditions. Certain embodiments of the invention may be characterized as a MEMS based reservoir fluid sensor adapted for do... | 10/14/2008 |
| 7392697 | Apparatus for downhole fluids analysis utilizing micro electro mechanical system (MEMS) or other sensors The present invention provides packaging for MEMS devices and other sensors for downhole application. The MEMS devices and/or other sensors may aid in characterizing formation fluids in situ. The packaging facilitates high temperature, high pressure use, which is of... | 07/01/2008 |
| 7389828 | Apparatus and method for mechanical caliper measurements during drilling and logging-while-drilling operations A caliper tool used on a drilling tubular and having extensible members that remain decoupled with respect to the borehole wall during caliper measurements and while the extensible members are extended to allow movement in and through the borehole. A processor proce... | 06/24/2008 |
| 7377169 | Apparatus and methods for acoustically determining fluid properties while sampling An apparatus and methods for acoustically analyzing a fluid sample and determining one or more properties of the sample are disclosed by the present invention. The apparatus comprises a chamber, a transmitter positioned within the chamber for transmitting an acousti... | 05/27/2008 |
| 7327145 | Azimuthally focused electromagnetic measurement tool An azimuthally sensitive electromagnetic measurement tool is provided. The tool may be suitable, for example, to measure azimuthal variations of electrical properties of a subterranean formation. The tool includes a transmitter disposed to transmit electromagnetic e... | 02/05/2008 |
| 7299884 | Seismic measurements while drilling Measurements are made continuously with a seismic while drilling (SWD) system and the measured data are stored in a working memory of a downhole processor along with quality control (QC) measurements. The QC data are analyzed and based on the analysis, portions of t... | 11/27/2007 |
| 7284428 | Sensor housing for use in a storage vessel A detection apparatus for use in a vessel for measuring a fluid includes a tubular connected to a housing containing sensors, wherein the housing includes a top, a bottom, and a hole disposed in the top of the housing. The housing containing sensors includes an oute... | 10/23/2007 |
| 7284440 | Line pressure compensated differential pressure transducer assembly A pressure transducer apparatus including: first and second pluralities of piezoresistors each coupled in Wheatstone bridge configurations, wherein the bridges are coupled together to provide a first output being indicative of a differential pressure; and, a third p... | 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 |
| 7257984 | Miniaturized sensor device for detecting characteristics of a fluid, in particular a lubricating oil A miniaturized sensor device comprises at least one pair of active projecting elements or cantilevers, which are set parallel to one another and at a micrometric or sub-micrometric distance apart and are designed to be submerged at least partially in a fluid. Each p... | 08/21/2007 |
| 7255173 | Instrumentation for a downhole deployment valve The present generally relates to apparatus and methods for instrumentation associated with a downhole deployment valve or a separate instrumentation sub. In one aspect, a DDV in a casing string is closed in order to isolate an upper section of a wellbore from a lowe... | 08/14/2007 |
| 7252162 | Method and device for injecting a fluid into a formation A method of injecting a stream of treatment fluid into an earth formation in the course of drilling a borehole into the earth formation, using an assembly having a drill string provided with at least one sealing means arranged to selectively isolate a selected part ... | 08/07/2007 |
| 7251566 | Pump off measurements for quality control and wellbore stability prediction A method for obtaining high-quality well logging data acquired during a drilling operation includes acquiring well logging data during a pump-off period when a mud pump is turned off; and extracting a subset of data from the acquired well logging data, wherein the s... | 07/31/2007 |
| 7243719 | Control method for downhole steering tool A method for determining a rate of change of longitudinal direction of a subterranean borehole is provided. The method includes positioning a downhole tool in a borehole, the tool including first and second surveying devices disposed thereon. The method further incl... | 07/17/2007 |
| 7233150 | While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about ... | 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 |
| 7219729 | Permanent downhole deployment of optical sensors The present invention involves methods and apparatus for permanent downhole deployment of optical sensors. Specifically, optical sensors may be permanently deployed within a wellbore using a casing string. In one aspect, one or more optical sensors are disposed on, ... | 05/22/2007 |
| 7216533 | Methods for using a formation tester A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown pist... | 05/15/2007 |
| 7210343 | Method and apparatus for obtaining a micro sample downhole The present invention provides a downhole sample tank and a plurality of micro sample chambers. The micro sample chambers can have at least one window for introduction of visible, near-infrared (NIR), mid-infrared (MIR) and other electromagnetic energy into the tank... | 05/01/2007 |
| 7207216 | Hydraulic and mechanical noise isolation for improved formation testing An apparatus and method for isolating a downhole tool section from hydraulic and mechanical noise. Anchoring grippers are used in conjunction with a fluid diverter valve to anchor the tool section to a borehole wall and divert fluid flowing in the drill string away ... | 04/24/2007 |
| 7182151 | Apparatus and method for horizontal drilling An apparatus and method for horizontally drilling for detecting subsurface features and avoiding such features during closed-loop control of an underground drilling machine. A horizontal drilling system includes a base machine capable of propelling a drill pipe rota... | 02/27/2007 |
| 7178608 | While drilling system and method A while drilling system and method for determining downhole parameters is provided. The system includes a retrievable while drilling tool positionable in a downhole drilling tool, a sensor chassis and at least one sensor. The while drilling tool is positionable in t... | 02/20/2007 |
| 7178392 | Determining the pressure of formation fluid in earth formations surrounding a borehole A method for determining formation fluid pressure in earth formation surrounding a borehole wall uses a downhole probe coupled to a variable-volume cavity. The probe is driven into contact with formation at the borehole wall. The method includes expanding the volume... | 02/20/2007 |
| 7178607 | While drilling system and method A while drilling system and method for determining annular pressure while drilling is provided. The system is positioned in a drilling tool suspended from a drilling rig via a drill string. The system includes at least one drill collar, a while drilling tool and at ... | 02/20/2007 |
| 7150188 | Non-invasive measurement of fluid-pressure diffusivity using electro-osmosis An apparatus for determining fluid-pressure diffusivity in a borehole (12) in a formation (10) includes an electrode (16) and a strain measuring device (18),(20) (or a particle velocity measuring device (18),(20) or a... | 12/19/2006 |
| 7134512 | Method of downhole drilling and apparatus therefor A downhole drilling apparatus suspended by tubing includes a drill bit driven by an electric motor powered by a cable means. The motor is mounted upon a hollow shaft which allows fluid to pass through, so that a fluid circuit along the tube and back along the annulu... | 11/14/2006 |
| 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 |
| 7096976 | Drilling formation tester, apparatus and methods of testing and monitoring status of tester An integrated drilling and evaluation system includes a drill string having an interior portion and a drill bit, carried on a lower end, that includes ports for communicating fluid between the interior portion of the drill string and an uncased well bore. A packer, ... | 08/29/2006 |
| 7093674 | Drilling formation tester, apparatus and methods of testing and monitoring status of tester An integrated drilling and evaluation system includes a drill string having an interior portion and a drill bit, carried on a lower end, that includes ports for communicating fluid between the interior portion of the drill string and an uncased well bore. A packer, ... | 08/22/2006 |
| 7082828 | Laser measurement of liquid level in a holder Leakage detection of cargo from the hold of a barge involves a mounting plate to the top hatch of the hold. Two pipes secured to the plate extend to locations near the bottom. Each pipe has a guide tube in it coaxial with the pipe. Each pipe has a float in it receiv... | 08/01/2006 |
| 7082821 | Method and apparatus for detecting torsional vibration with a downhole pressure sensor A method and apparatus for detecting torsional vibration, or stick-slip, in a drill string while drilling is described. The method comprises sampling a downhole pressure sensor and using embedded filter schemes and algorithms to determine, based on the pressure samp... | 08/01/2006 |
| 7073580 | Inflation tool with real-time temperature and pressure probes Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore in real time prior to setting an inflatable element in the wellbore. The inflatable element is inflated with an inflation tool run on a cable... | 07/11/2006 |
| 7062959 | Method and apparatus for determining downhole pressures during a drilling operation A method and apparatus is provided to determine downhole pressures, such as annular pressure and/or pore pressure, during a drilling operation. A downhole drilling tool includes at least one conduit and a corresponding gauge. The conduit is positioned in the downhol... | 06/20/2006 |
| 7063174 | Method for reservoir navigation using formation pressure testing measurement while drilling A formation pressure testing while drilling device on a bottomhole assembly makes measurements of fluid pressure during drilling of a borehole. Based on the pressure measurements, drilling direction can be altered to maintain the wellbore in a desired relation to a ... | 06/20/2006 |
| 7059180 | Water cut rate of change analytic method A method of measuring a water effect on an underground non-water well includes the steps of assembling a history of water cut (WC) measurements for the well over an extended period of time, determining a water cut rate of change (R) for the well based upon the histo... | 06/13/2006 |
| 7013724 | Method for characterizing parameters of wells, well bottom zone and formation, and device for carrying out said method The invention is related to the oil industry and can be used in well intake capacity testing and well bottom zone treatment. On injection line in front of the wellhead it is set a measuring section of a length allowing to fix pressure drops when flow medium o... | 03/21/2006 |
| 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 |
