Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 7990138 | Probe for analysis of a string of rods or tubes in a well The invention concerns a probe for analysis of a collection of rods or tubes comprising an elongated casing which bears, at a first end, at least one first magnetometer and, at a position sufficiently remote from the magnetometer, a permanent magnet, the north-south... | 08/02/2011 |
| 7960969 | Electromagnetic imaging method and device An electromagnetic imaging apparatus and method for electromagnetically measuring physical parameters of a pipe CJ, CC by means of a plurality of measuring arrangement ZMA, MCMA, MonMa, ImMA comprising a plurality of transmitter coil ZTX, LFTX, DTX and a plurality o... | 06/14/2011 |
| 7622916 | Detector A casing position locator for detecting structural features of a borehole casing, the locator including: a plurality of field generators for generating respective dynamic magnetic fields which combine to provide a dynamic test magnetic field to interact with the cas... | 11/24/2009 |
| 7595636 | Apparatus and method of using accelerometer measurements for casing evaluation A casing inspection device with magnets and flux sensors. Measurements of axial motion of the device are used to get better definition of the axial extent of casing defects. A contact device may be used for motion measurement. The output of the contact device may be... | 09/29/2009 |
| 7413011 | Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator Systems and methods for optically determining casing collar and/or corrosion locations within boreholes, using the diffraction effect of Faraday crystals through which depolarized continuous light is transmitted within optical fibers. ... | 08/19/2008 |
| 7403000 | Apparatus and method of determining casing thickness and permeability A casing inspection device with magnets and flux sensors. The sensors provide measurements of absolute levels of magnetic flux that are indicative of changes in casing thickness and/or permeability. ... | 07/22/2008 |
| 7354348 | Hollow universal joint A hollow universal joint having a first member, a second member and a first hollow yoke ring coupling the first member to the second member to transfer rotational motion between the first and second members. The first hollow yoke ring has a first central axis. The f... | 04/08/2008 |
| 7314099 | Selectively actuatable expandable underreamer/stablizer An expandable downhole tool comprises a tubular body having an axial flowbore extending therethrough, at least one moveable arm, and a selectively actuatable sleeve that prevents or allows the at least one moveable arm to translate between a collapsed position and a... | 01/01/2008 |
| 7287592 | Limited entry multiple fracture and frac-pack placement in liner completions using liner fracturing tool The present invention is directed to a method and apparatus for fracturing a subterranean formation which use a liner fracturing tool. The liner fracturing tool consists of a liner, with at least one jet extending through the liner. During fracturing operations, fra... | 10/30/2007 |
| 7253636 | Wire tracer receiver A method and apparatus includes a signal generator, a power supply, a micro-controller, a transmitter and a receiver for determining the condition of a line. The signal is passed through the line and any reflection is used to determine varying characteristics of the... | 08/07/2007 |
| 7231320 | Extraction of imperfection features through spectral analysis Autonomous non-destructive inspection equipment provides automatic and/or continuous inspection and evaluation of a material under inspection. The inspection equipment preferably comprises at least one detection sensor and at least one detection sensor interface for... | 06/12/2007 |
| 7182141 | Expander tool for downhole use An expander tool for expanding a first tubular into a second surrounding tubular within a wellbore. The expander tool first comprises a body. Within the body is an expansion member capable of being actuated outwardly from the body when expansion of the first tubular... | 02/27/2007 |
| 7178418 | Segment of a sensor-supporting element for a scraper-type device Disclosed is a segment (15) of a sensor-supporting element for a scraper-type device, which comprises at least two pairs of runners (16a, 16b) that are arranged essentially parallel behind each other. A support plate (20) re... | 02/20/2007 |
| 7159660 | Hydrajet perforation and fracturing tool Methods and apparatus for fracturing a subterranean formation which use a fracturing tool. The fracturing tool includes a hydrajet tool, with at least one fluid jet and at least one fracturing port extending through the liner. The fracturing tool further includes a ... | 01/09/2007 |
| 7107154 | Wellbore evaluation system and method A wellbore evaluation system evaluates mechanical wear and corrosion to components of a well system including a production tubing string positionable in a well and a sucker rod string movable within the production tubing string. A deviation sensor determines a devia... | 09/12/2006 |
| 7095223 | Method of locating an anomaly in a tubular member in a well A detector assembly and methods including a magnetoresistive sensor capable of detecting anomalies in the wall of a casing string disposed in a wellbore. Examples of anomalies include gaps between casings such as due to casing joints, air gaps in casing threads such... | 08/22/2006 |
| 7059405 | Methods of treating subterranean formations using low-molecular-weight fluids The present invention relates to systems and methods useful in subterranean treatment operations. Examples of methods of the present invention include methods for fracturing a portion of a subterranean formation penetrated by a well bore; methods of enhancing produc... | 06/13/2006 |
| 7012852 | Method, apparatus and system for detecting seismic waves in a borehole A method, apparatus and system for detecting seismic waves. A sensing apparatus is deployed within a bore hole and may include a source magnet for inducing a magnetic field within a casing of the borehole. An electrical coil is disposed within the magnetic field to ... | 03/14/2006 |
| 6975120 | Measurement of subterranean lithology using electromagnetic energy The invention subject of this application pertains to a method and apparatus for measuring the subterranean lithology using electromagnetic energy. The invention is applicable to the measurement from within uncased boreholes, i.e., and open-holes. The present invent... | 12/13/2005 |
| 6924640 | Oil and gas well tubular inspection system using hall effect sensors An inspection system for detecting flaws in oil and gas well borehole ferromagnetic tubulars. The inspection device operates inside the tubular by first saturating tubular wall with magnetic flux. Flaws in the wall causes flux leakage, and the magnitude of the flux ... | 08/02/2005 |
| 6911826 | Pulsed eddy current sensor probes and inspection methods A pulsed eddy current sensor probe includes a sensor array board. A number of sensors are arranged on the sensor array board and are operable to sense and generate output signals from the transient electromagnetic flux in a part being inspected. Each of the sensors ... | 06/28/2005 |
| 6815946 | Magnetically activated well tool A detector assembly and methods including a magnetoresistive sensor capable of detecting anomalies in the wall of a casing string disposed in a wellbore. Examples of anomalies include gaps between casings such as due to casing joints, air gaps in casing threads such... | 11/09/2004 |
| 6768299 | Downhole magnetic-field based feature detector An apparatus that is usable with a subterranean well includes a magnetometer and a circuit. The magnetometer indicates a strength of a magnetic field that at least partially extends through a portion of a downhole pipe. The circuit is coupled to the magnetometer to ... | 07/27/2004 |
| 6762601 | Non-invasive detectors for wells Detector circuitry for detecting magnetic field disturbances resulting from the movement of equipment through a pipe of magnetic material, the detector circuitry comprising a difference circuit fed with the outputs of two longitudinally spaced sensor means via respe... | 07/13/2004 |
| 6526114 | Remote automated nuclear reactor jet pump diffuser inspection tool An inspection apparatus for inspecting welds in a nuclear reactor jet pump includes a probe subassembly rotatably and linearly movably coupled to a frame structure configured to attach to a top flange of the reactor pressure vessel. The probe subassembly ... | 02/25/2003 |
| 6411084 | Magnetically activated well tool A casing joint locator device and methods of use are described. The locator device includes a giant magnetoresistive (GMR) sensor that is capable of detecting joints between sections of casing in a wellbore. The methods and devices described detect pertur... | 06/25/2002 |
| 6145378 | Aided inertial navigation system The invention relates particularly to sensing devices and techniques which may be used to provide measurement data to aid an inertial navigation system, or attitude and heading reference system, and so bound the growth of errors which increase with time i... | 11/14/2000 |
| 6084403 | Slim-hole collar locator and casing inspection tool with high-strength pressure housing An inductive collar locator tool is provided that provides improved sensitivity and precision in locating collars and other discontinuities in a casing string. In a preferred embodiment, the collar locator includes a transmitter coil that produces an osci... | 07/04/2000 |
| 5670878 | Inspecting a conductive object with a steady state magnetic field and induced eddy current There is provided a transient electromagnetic method and apparatus for inspecting objects. The apparatus includes a sensing portion, which has a transmitting antenna and at least one receiving antenna thereon. The sensing portion is located adjacent to th... | 09/23/1997 |
| 5429190 | Slick line casing and tubing joint locator apparatus and associated methods A detector structure is used to sense and log the joints in a downhole jointed tubular structure, such as a well bore casing or production tubing, in a subterranean well. The detector is moved through the jointed tubular structure on an elongated position... | 07/04/1995 |
| 5426367 | Logging of cased well by induction logging to plot an induction log of the well Well logging method and apparatus which provides a magnetic saturation signal to at least a transmitter and one receiver mounted in a well casing of a well so as to open "windows" in the casing to allow the impedances of the formations outside the casing ... | 06/20/1995 |
| 5396800 | Apparatus and method for inspecting a control rod drive mechanism penetration tube for degradation Apparatus and method for inspecting a tubular member for degradation, which tubular member may be a control rod drive mechanism (CRDM) penetration tube of the kind typically found in nuclear power reactor pressure vessels. The CRDM penetration tube includ... | 03/14/1995 |
| 5397985 | Method for the imaging of casing morphology by twice integrating magnetic flux density signals Apparatus for 360° azimuthal imaging of steel casing employs a transducer that is rotated around the inside wall of the casing for inducing and measuring variations in induced flux density within the casing as an indication of changes in casing thickness... | 03/14/1995 |
| 5361838 | Slick line casing and tubing joint locator apparatus and associated methods An electromechanical detector structure is used to sense and log the joints in a downhole jointed tubular structure, such as a well bore casing or production tubing, in a subterranean well. The detector is lowered into the tubular structure on an elongate... | 11/08/1994 |
| 5351564 | Pipeline inspection vehicle A pipeline inspection vehicle comprises a body 18 an electromagnet 20 for generating magnetic flux, and two foil packs 24, 26 for conducting the flux into and out of the pipewall 10. An array of defect sensors is arranged around the body 18, each sensor b... | 10/04/1994 |
| 4902976 | Probe for detecting the presence of magnetic material in a ground hole In use, the probe (1) is dropped into a ground-hole (3), for the purpose of detecting the depth of the steel casing (16) of the hole. The probe comprises a long, slim, tubular housing (2) made of stainless steel. Attached inside the housing is a springy s... | 02/20/1990 |
| 4843317 | Method and apparatus for measuring casing wall thickness using a flux generating coil with radial sensing coils and flux leakage sensing coils A method and apparatus for measuring casing wall thickness using an axial main coil for generating a flux field enveloping the casing wall, and sensing actual field distribution by means of plural radial sensing coils each disposed at a radial position wi... | 06/27/1989 |
| 4808925 | Three magnet casing collar locator For use with casing having flush joint collars, a detection system is set forth which comprises a tool body made of nonmagnetic material and enclosing abutted first, second and third permanent magnets. The magnets are axially aligned, abutted so that oppo... | 02/28/1989 |
| 4803563 | Rotor-in-stator examination magnetic carriage and positioning apparatus A moveable magnetic carriage on which is mounted inspection equipment for inspecting the stator of an electrical generator without removal of the generator rotor. An associated positioning device positions the carriage on the generator.... | 02/07/1989 |
| 4794336 | Apparatus for surveying a borehole comprising a magnetic measurement probe to be moved within a drill pipe to a measurment position within a non-magnetic collar A single-shot or multi-shot measurement probe incorporates a magnetic field sensor for sensing the earth's magnetic field, a processing unit for determining from the output of the sensor that the probe has moved from within a section of a drill pipe made ... | 12/27/1988 |
