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| Number | Title | Issue Date |
| 8069932 | Method and apparatus for determining formation pararmeters using a seismic tool array A method and apparatus for determining formation parameters including a seismic array for receiving seismic waves at plurality of depth simultaneously, thereby enabling a determination of a formation velocity by using a difference in the seismic waves received by th... | 12/06/2011 |
| 8061444 | Methods and apparatus to form a well Methods and apparatus to form a well are disclosed. An example method involves determining a reservoir fluid map associated with at least a portion of a reservoir. The first fluid map has first fluid composition data associated therewith. The example method also inv... | 11/22/2011 |
| 8061443 | Downhole sample rate system In one aspect of the invention, a downhole sensor system comprises at least one downhole sensor disposed on or within a downhole component of a tool string. The downhole sensor is adapted to detect at least one characteristic of a downhole formation adjacent the dow... | 11/22/2011 |
| 7987925 | Method and apparatus for collecting drill bit performance data Drill bits and methods for sampling sensor data associated with the state of a drill bit are disclosed. A drill bit for drilling a subterranean formation comprises a bit body and a shank. The shank further includes a central bore formed through an inside diameter of... | 08/02/2011 |
| 7980327 | Sub-surface imaging using antenna array for determing optimal oil drilling site The invention provides for systems and methods of enhancing crude oil recovery providing an array of electromagnetic receiver antennae arranged and operated in conjunction with an array of far field electromagnetic transmitter antennae for mapping subsurface feature... | 07/19/2011 |
| 7954560 | Fiber optic sensors in MWD Applications A wellbore drilling system utilizes optical fibers to measure parameters of interest and to communicate data. One or more electrical conductors are used to provide power to the components of the drilling system. The acquisition electronics for operating fiber optic ... | 06/07/2011 |
| 7946357 | Drill bit with a sensor for estimating rate of penetration and apparatus for using same In one embodiment, an apparatus includes a drill bit, a tip on a bit body configured to contact a formation when the drill bit is utilized to cut into the formation, and a spring coupled to the tip. The apparatus also includes a sensor coupled to the spring and conf... | 05/24/2011 |
| 7861801 | Method to detect coring point from resistivity measurements Methods are described using resistivity ahead of a drill bit measurements obtained while drilling a subterranean well using a drilling mud. Resistivity data ahead of the bit is gathered during drilling and prior to penetrating a region of interest of a target subter... | 01/04/2011 |
| 7819206 | System and method for logging with wired drillpipe A system for logging with wired drill pipe includes a logging tool string; an interface sub in operable communication with the logging tool string; and a wired pipe in operable communication with the interface sub and method for logging with wired drill pipe. ... | 10/26/2010 |
| 7665544 | Method to improve downhole instruments Measurements are made using a plurality of measure electrodes on a pad of a logging tool. The bias and gain of the measurements prior to A/D conversion are altered using measurements made by an additional electrode that is ahead of the measure electrodes. ... | 02/23/2010 |
| 7571777 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a mono... | 08/11/2009 |
| 7546885 | Apparatus and method for obtaining downhole samples A downhole drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a formation evaluation tool having fixed and retrievable portions. The fixed portion is operatively connected to a drill collar of the downhole to... | 06/16/2009 |
| 7438128 | Identifying zones of origin of annular gas pressure A method for identifying annular gas sources in a wellbore is disclosed. In one embodiment, the method comprises providing a set of parameters, wherein the set of parameters corresponds to depths in the wellbore. In addition, the method comprises analyzing annular g... | 10/21/2008 |
| 7434631 | Apparatus and method of controlling motion and vibration of an NMR sensor in a drilling BHA A system for controlling sensor motion during a time-dependent measurement, comprising a drilling assembly having a drill bit at one end and engaged with a drill string extending to a surface location at an opposite end thereof. A sensor is disposed in the drilling ... | 10/14/2008 |
| 7426968 | Drill bit assembly with a probe The current invention discloses a drill bit assembly with a body portion intermediate a shank portion and a working portion. The working portion may have at least one cutting element. The drill bit assembly may also have a shaft with a first end disposed within the ... | 09/23/2008 |
| 7410011 | Method to determine the concentration of deuterium oxide in a subterranean formation The extent of invasion of a water-based drilling fluid into a formation may be determined using at least two tracers where one is deuterium oxide and the other is a water-soluble tracer. One such method includes introducing a drilling fluid having an aqueous phase a... | 08/12/2008 |
| 7404456 | Apparatus and method of identifying rock properties while drilling Acoustic signals generated by drilling a bore hole with a drill bit are received at sensors placed in the drill string. The acoustic signals received by the sensors are processed, e.g. using a Fourier transform, and a characteristic of the acoustic signals is used t... | 07/29/2008 |
| 7403857 | Enhanced measurement of azimuthal dependence of subterranean parameters with filters and/or discretely sampled data A method for estimating an azimuthal dependence of a parameter of a borehole using logging sensor measurements acquired as a function of azimuth of the logging sensors is provided. The method includes acquiring at least one logging sensor measurement and a correspon... | 07/22/2008 |
| 7398837 | Drill bit assembly with a logging device In some aspects of the present invention, a drill bit assembly has a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element. In some embodiments, the drill bit assembly has a shaft with an end substantia... | 07/15/2008 |
| 7400978 | Method for updating a geologic model by seismic data A method of predicting petrophysical characteristics of an underground reservoir by constructing a geologic model consistent with seismic measurements is disclosed which permits optimization of oil reservoir development schemes. A geologic model, from which seismic ... | 07/15/2008 |
| 7395879 | MWD formation tester An apparatus including a drill collar having an outer surface, an assembly for interaction with an earth formation coupled to the drill collar, the assembly including a first member to extend beyond the drill collar outer surface and a second member to extend beyond... | 07/08/2008 |
| 7388380 | While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics and other useful information Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming poten... | 06/17/2008 |
| 7373251 | Method for predicting quantitative values of a rock or fluid property in a reservoir using seismic data A method is provided for predicting a value of a designated rock or fluid property in a subterranean geologic volume. A first predicted value of the designated rock or fluid property is also assigned to a volume of a multi-dimensional, multi-scale model. A first pre... | 05/13/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 7350568 | Logging a well A method for logging a well. Includes receiving energy with at least one array of elements coupled to a drill bit, wherein the at least one array of elements functions as an electronic array. An apparatus for logging a well includes a drill bit and at least one arra... | 04/01/2008 |
| 7334652 | Roller cone drill bits with enhanced cutting elements and cutting structures Roller cone drill bits are provided with cutting elements and cutting structures optimized for efficient drilling of soft and medium formations interspersed with hard stringers. The cutting elements and cutting structures may be satisfactorily used to drill downhole... | 02/26/2008 |
| 7323434 | Electropositive production well treating fluid and method of preparing the same An electropositive and water-based production well treating fluid system exhibits electropositivity by using a cationic viscosifier meanwhile matched with a cationic fluid loss additive and, optionally, contains a mud-building agent, an electrical stabilizing agent,... | 01/29/2008 |
| 7322433 | Tool for excavating an object A Tool for excavating an object, the tool having a jetting system arranged to impinge the object to be excavated with a jetted stream of a drilling fluid mixed with abrasive particles, the jetting system being provided with at least a mixing chamber wit... | 01/29/2008 |
| 7309857 | Gamma ray detectors having improved signal-to-noise ratio and related systems and methods for analyzing materials in an oil well A gamma ray detector assembly for placement in a logging tool in a borehole can include a first gamma ray detector elongated along an axis and having a void extending along the axis. A second gamma ray detector conforms to at least a portion of the void. The first a... | 12/18/2007 |
| 7302346 | Data logging A device and method for determining a geophysical characteristic of a borehole using at least one logging device is provided, wherein the at least one logging device includes at least one sensing device. The method includes associating the at least one sensing devic... | 11/27/2007 |
| 7301345 | While-drilling methodology for estimating formation pressure based upon streaming potential measurements Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming poten... | 11/27/2007 |
| 7293613 | Logging-while-coring method and apparatus A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wir... | 11/13/2007 |
| 7287609 | Drilling a borehole A method of drilling a borehole into a subsurface earth formation, using a tubular drill string which includes at its lower end a bottom hole assembly comprising a drill bit, a drill steering system, and a surveying system. The drill string includes a selectively cl... | 10/30/2007 |
| 7285772 | Logging tool with a parasitic radiation shield and method of logging with such a tool It is described a logging tool 20 for underground formations surrounding a borehole 14, comprising an elongated body 21 along a major axis; a collar 22 disposed peripherally around said body 21 having a collar wall defined by an in... | 10/23/2007 |
| 7281592 | Injecting a fluid into a borehole ahead of the bit A method and system for introducing a fluid into a borehole, in which there is arranged a tubular drill string including a drill bit, wherein the drill bit is provided with a passageway between the interior of the drill string and the borehole, and with a removable ... | 10/16/2007 |
| 7275593 | Gripper assembly for downhole tools A gripper assembly for anchoring a tool within a downhole passage and for possibly assisting movement of the tool within the passage. The gripper assembly includes an elongated mandrel and flexible toes that can be radially displaced to grip onto the surface of the ... | 10/02/2007 |
| 7275605 | Rotatable drill shoe A rotatable drilling shoe attachable to a section of casing that allows for drilling and casing of a well bore in a single trip. The drilling shoe includes a fixed section and a rotatable section that has a drillable bit attached thereto. The drilling shoe further i... | 10/02/2007 |
| 7270182 | Earth loop installed with sonic apparatus A method for installing a heat exchange pipe loop in a borehole, the method, in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill apparatus on a lower end of the casing movable by th... | 09/18/2007 |
| 7266983 | Methods to detect formation pressure A method of determining a formation pressure during drawdown of a formation comprises sampling fluid from a formation using a downhole tool. A fluid sample pressure is determined at two different times during the drawdown. The fluid sample pressures are analyzed usi... | 09/11/2007 |
