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Class 324/346 - Within a borehole


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter adapted for use within a drill hole in the
No. of patents: 154
Last issue date: 09/27/2011


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NumberTitleIssue Date
8026722Method of magnetizing casing string tubulars for enhanced passive ranging
A method for magnetizing a wellbore tubular includes magnetizing the tubular at three or more discrete locations on the tubular. In exemplary embodiments the magnetized wellbore tubular includes at least one pair of opposing magnetic poles located between longitudin...
09/27/2011
8008919Method for compensating drill pipe and near-borehole effect on and electronic noise in transient resistivity measurements
Transient measurements made at two spaced apart receivers responsive to separate activation of two transmitters symmetrically disposed about the two receivers. The transmitters and receivers are on an instrument having a conductive body induces currents in the earth...
08/30/2011
7816922Magnetization of target well casing string tubulars for enhanced passive ranging
A method for magnetizing a wellbore tubular is disclosed. The method includes magnetizing a wellbore tubular at three or more discrete locations on the tubular. In exemplary embodiments the magnetized wellbore tubular includes at least one pair of opposing magnetic ...
10/19/2010
7816923Enhanced passive ranging methodology for well twinning
A method for drilling substantially parallel twin wells includes drilling a first well and deploying a casing string in the first well. A magnetized section of the casing string includes a plurality of magnetized wellbore tubulars having at least one pair of opposin...
10/19/2010
7812610Method and apparatus for locating well casings from an adjacent wellbore
A wellbore tool for locating a target wellbore containing a conductive member from a second wellbore and directing the trajectory of the second wellbore relative to the target wellbore includes an electric current driver having an insulated gap; a three-axis magneto...
10/12/2010
7663373Determining beacon location using magnetic field ratios
A method and system for identifying a location of a magnetic field source. A total magnetic field is measured during a calibration routine prior to a drilling procedure. During the drilling procedure, a magnetic field measurement is obtained. Using a ratio of the me...
02/16/2010
7656161Magnetization of target well casing strings tubulars for enhanced passive ranging
A method for magnetizing a wellbore tubular is disclosed. The method includes magnetizing a wellbore tubular at three or more discrete locations on the tubular. In exemplary embodiments the magnetized wellbore tubular includes at least one pair of opposing magnetic ...
02/02/2010
7414405Measurement tool for obtaining tool face on a rotating drill collar
An apparatus for obtaining tool face angles on a rotating drill collar in substantially real time is disclosed. In one exemplary embodiment the apparatus includes a magnetoresistive magnetic field sensor deployed in a tool body. The apparatus further includes a prog...
08/19/2008
7403013Boring tool tracking/guiding system and method with unconstrained target location geometry
Tracking a boring tool is performed within an underground region using a locating signal. The boring tool is moved through the ground during a series of distance movements such that potential movement of the boring tool during any one of the distance movements is le...
07/22/2008
7385400Azimuthally sensitive receiver array for an electromagnetic measurement tool
An azimuthally sensitive logging while drilling tool is disclosed. The tool may be suitable, for example, to measure azimuthal variations of electrical properties of a subterranean formation. The tool includes at least one transmitter disposed to transmit electromag...
06/10/2008
7377333Linear position sensor for downhole tools and method of use
Aspects of this invention include a downhole tool having first and second members disposed to translate substantially linearly with respect to one another. A magnet is deployed on the first member and a plurality of magnetic field sensors is deployed on the second m...
05/27/2008
7363161Pore-scale geometric models for interpretation of downhole formation evaluation data
The grain size of a pore-scale geometric model of a clastic earth formation are adjusted so that the NMR relaxation time distribution output of the model matches a measured NMR distribution. Fluid drainage and imbibing can be simulated. Additional properties of the ...
04/22/2008
7360595Method 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
7339450Inductive miniature component, especially antenna
Disclosed is an inductive miniature structural element, particularly an antenna. Said structural element comprises a winding member (1) which is embodied as a flat component and on which three coil windings (2X, 2Y, 2Z) are mounted in suc...
03/04/2008
7235970Antenna core material for use in MWD resistivity measurements and NMR measurements
The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material with explicitly low magnetostriction as an antenna core material for NMR and resistivity devices in a borehole. The probe stuctural geometr...
06/26/2007
7219749Single solenoid guide system
Measurement of the location and direction of a drill head in a borehole extending beneath an obstacle such as a body of water utilizes a single AC solenoid at a known location but having an unknown orientation. The measurements are used to direct the path of the bor...
05/22/2007
7213644Cavity positioning tool and method
In accordance with the teachings of the present invention, a method is provided for preventing formation of sludge in a subsurface cavity having particulate laden fluid disposed therein. The method includes positioning a downhole device having a fluid agitator into ...
05/08/2007
7207395Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement
A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f...
04/24/2007
7207390Method and system for lining multilateral wells
In accordance with one embodiment of the present invention, a method for lining a lateral wellbore includes drilling a main wellbore extending from a surface to a subterranean zone, casing the main wellbore with a main casing having a plurality of lateral wellbore w...
04/24/2007
7163063Method and system for extraction of resources from a subterranean well bore
A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bo...
01/16/2007
7150188Non-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
7134493Logging system for use in a wellbore
A logging system that may be used in a wellbore formed in an earth. A tubular conduit extends from surface into the wellbore and contains a body of wellbore fluid. A logging tool string may be passed from a position within the conduit to a position outside the condu...
11/14/2006
7100687Multi-purpose well bores and method for accessing a subterranean zone from the surface
A well system includes at least two well bores extending from a surface to a subterranean zone. Each of the two well bores is used to form a well bore pattern for the subterranean zone that intersects the other well bore and transports fluid from the subterranean zo...
09/05/2006
7095232Determination of borehole geometry inside cased wells with crosswell electromagnetics
A method is disclosed for locating a receiver in a borehole having a conductive liner by inducing an electromagnetic field from a transmitter in a first borehole, detecting at a first location by at least one receiver located in a second borehole having a conductive...
08/22/2006
7091722Method and apparatus for measuring mud resistivity
A sensor for measuring mud resistivity in a borehole includes a transmitter having a magnetic moment in a first direction; and a receiver having a magnetic moment in a second direction, wherein the first direction and the second direction are substantially different...
08/15/2006
7082993Means and method for assessing the geometry of a subterranean fracture during or after a hydraulic fracturing treatment
A method is given of fracturing a subterranean formation including the step of a) pumping at least one device actively transmitting data that provide information on the device position, and further comprising the step of assessing the fracture geometry based on the ...
08/01/2006
7084625Method and apparatus of reducing ringing in a nuclear magnetic resonance probe
The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material with explicitly low magnetostriction as a NMR probe core material. The probe structural geometry facilitates the use of material, which has...
08/01/2006
7073595Method and system for controlling pressure in a dual well system
A method for controlling pressure of a dual well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone using a drill string. The articulated w...
07/11/2006
7064677Method of monitoring service operations of a service vehicle at a well site
A method monitors servicing operations of a vehicle capable for example of pumping various fluid treatments down into a well being serviced at a well site. The method records the vehicle's engine speed and the values of one or more service-related variables, such as...
06/20/2006
7053622Measuring equipment and method for mapping the geology in an underground formation
The invention relates to measuring equipment and method for mapping the geology including a transmitter circuit with a current source for generating an electric current and a transmitter coil; a switch for connecting the current source to the transmitter coil during...
05/30/2006
7049821Determination of borehole geometry inside cased wells with crosswell electromagnetics
A method is disclosed for locating a receiver in a borehole having a conductive liner by inducing an electromagnetic field from a transmitter in a first borehole, detecting at a first location by at least one receiver located in a second borehole having a conductive...
05/23/2006
7048049Slant entry well system and method
A system for accessing a subterranean zone from the surface includes an entry well bore extending down from the surface. A plurality of slanted well bores extend from the entry well bore to the subterranean zone. Drainage patterns extend from the slanted well bores ...
05/23/2006
7038454System and method for detecting an underground object using magnetic field sensing
A system and method use magnetic field sensing to detect underground objects for strike avoidance. The system detects magnetic field components for both passive distortions in the magnetic field indicative of a ferromagnetic object and active magnetic fields that ar...
05/02/2006
7036584Method and system for accessing a subterranean zone from a limited surface area
A method and system for accessing subterranean resources from a limited surface area includes a first well bore extending from the surface to the target zone. The first well bore includes an angled portion disposed between the target zone and the surface to provide ...
05/02/2006
7031839Multi-frequency focusing for MWD resistivity tools
An induction logging tool is used on a MWD bottom hole assembly. Due to the finite, nonzero, conductivity of the mandrel, conventional multi frequency focusing (MFF) does not work. A correction is made to the induction logging data to give measurements simulating a ...
04/18/2006
7025154Method and system for circulating fluid in a well system
A method for circulating drilling fluid in a well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone. The articulated well bore is horizont...
04/11/2006
7025137Three-dimensional well system for accessing subterranean zones
A drainage system for accessing multiple subterranean zones from the surface includes an entry well extending from the surface. The system also includes two or more exterior drainage wells extending from the entry well through the subterranean zones. The exterior dr...
04/11/2006
7026820Method and apparatus for minimizing direct coupling for downhole logging devices
A method and apparatus for minimizing direct coupling between transmitters and receivers on a downhole logging tool are disclosed. One embodiment includes a transmitter, a bucking device, and a plurality of receivers, where signals may be directly coupled from the t...
04/11/2006
7021403Method of establishing positions of locating field detectors and path mapping in underground boring tool applications
Specific apparatus and associated methods are described for use in establishing the positions of locating field detectors and for path mapping within a region for the purpose of tracking and/or guiding the movement of an underground boring tool. In one aspect, an im...
04/04/2006
7019518Non-contacting apparatus and method for measurement of ferromagnetic metal thickness
This invention pertains to a method and apparatus for determining the thickness of a ferromagnetic or paramagnetic material when only one side of the material is accessible. In one embodiment, the invention provides a method for engaging a constant signal with the f...
03/28/2006
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