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| Number | Title | Issue Date |
| 7916041 | Hole depth sensing A method of sensing and transmitting hole depth information comprises monitoring, at the surface, the extension of the hole as drilling progresses, determining when the hole depth has extended by a predetermined distance, and sending an increment signal to a telemet... | 03/29/2011 |
| 7579962 | Duct mapping device using sonde A duct mapping tool comprises a sonde for transmitting a locate signal detectable above the ground and locomotion means for providing movement through the underground duct. A user above the ground detects the transmitted location signal using a signal receiver, and ... | 08/25/2009 |
| 7416028 | Telemetry system for the bi-directional communication of data between a well point and a terminal unit situated on the surface A telemetry system for bi-directional communication of data between a well point and a terminal unit situated on a surface, which can be used inside drilling or production strings. The system includes data transmission and optional reception devices. An active vehic... | 08/26/2008 |
| 7350410 | System and method for measurements of depth and velocity of instrumentation within a wellbore A survey tool for use in a wellbore includes a downhole portion having an axis. The downhole portion is adapted to move within the wellbore with the axis generally parallel to the wellbore. The survey tool further includes a first acceleration sensor mounted at a fi... | 04/01/2008 |
| 7343261 | Underwater sensor transmitter probe An electronic apparatus for measuring water speed and water temperature then periodically transmitting said data during controlled depth fishing wherein an underwater probe is secured to and insulated conductive downrigger cable and gathers and relays data though th... | 03/11/2008 |
| 7295926 | Method for correlating well logs Embodiments of the present invention provide methods for correlating well logs. More specifically, but not by way of limitation, in an embodiment of the present invention, data from two or more overlapping logs may be generated by a well logging device and a model f... | 11/13/2007 |
| 7295491 | High impact communication and control system A system and method in accordance with the invention communicator remotely with remotely controllable down hole tools in a well bore at a drilling installation. At the surface, high energy pressure impulses directed into the tubing or the annulus, or both, being at ... | 11/13/2007 |
| 7289038 | Underwater sound radiation apparatus A plurality of actuators are provided at predetermined intervals on the reverse surface of a predetermined side wall of a swimming pool. When an electric signal corresponding to a sound to be propagated in the water is given to the actuators, the electric signal is ... | 10/30/2007 |
| 7282663 | Forge welding process An automated method for forge welding tubulars including heating the tubular ends to be joined in a welding chamber while the heated tubular ends are maintained aligned and parallel relative to each other and at a small spacing, whereupon the heated tubular ends are... | 10/16/2007 |
| 7274989 | Borehole equipment position detection system It is important to know the precise position of equipment when testing of the BOP, testing the wellhead, flow testing the well, kick control, well circulation and testing of spool trees between the wellhead and the BOP. Accordingly, there is provided a system for de... | 09/25/2007 |
| 7253671 | Apparatus and method for compensating for clock drift in downhole drilling components A precise downhole clock that compensates for drift includes a prescaler configured to receive electrical pulses from an oscillator. The prescaler is configured to output a series of clock pulses. The prescaler outputs each clock pulse after counting a preloaded num... | 08/07/2007 |
| 7140435 | Optical fiber conveyance, telemetry, and/or actuation Methods and apparatus comprise a conveyance structure to carry a tool into a wellbore. The conveyance structure contains an optical fiber line to enable communication between the tool and well surface equipment. In one implementation, the conveyance structure compri... | 11/28/2006 |
| 7142985 | Method and apparatus for improving wireline depth measurements Wireline depths are estimated using cable depth measurements and accelerometer depth measurements made over a time interval encompassing the time for which the wireline depth is being estimated. A least squares smoothing filter or a weighted least squares smoothing ... | 11/28/2006 |
| 7132958 | Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation A method and a downhole telemetry system a downhole telemetry system using discrete multitone modulation for transmitting a data stream over a plurality of transmission modes is provided. The downhole telemetry system includes a downhole transmitter, a cable, and a ... | 11/07/2006 |
| 7113097 | Underwater device with transmitter An apparatus that attaches to a moving, typically man-made, underwater object and that is capable of sending a signal is disclosed. The apparatus includes a housing, which in some embodiments is configured to look like an underwater organism. Within or on the housin... | 09/26/2006 |
| 7069780 | Gravity techniques for drilling and logging Techniques for using gravity in applications such as drilling and logging. Techniques are present for (1) gravity well logging using gravity sensors arrays; (2) creating density pseudosections using gravity measurements; (3) performing Gravity Measurement While Dril... | 07/04/2006 |
| 7064676 | Downhole data transmission system A system for transmitting data through a string of downhole components. In one aspect, the system includes first and second magnetically conductive, electrically insulating elements at both ends of the component. Each element includes a first U-shaped trough with a ... | 06/20/2006 |
| 7053787 | Slickline signal filtering apparatus and methods A signal filtering apparatus and associated methods enable noise to be significantly reduced or eliminated from a signal. In a described embodiment, the signal is indicative of tension in a slickline. An adaptive filter is used to effectively cancel the noise from t... | 05/30/2006 |
| 6970056 | Filter assembly and communication apparatus A filter assembly includes a transmission filter, a reception filter, a change-over switch, and phase circuits. The transmission filter has first and second ends electrically connected to a first antenna terminal and a transmission terminal, respectively. The recept... | 11/29/2005 |
| 6950034 | Method and apparatus for performing diagnostics on a downhole communication system A method for performing diagnostics on a wired drill pipe telemetry system of a downhole drilling system is provided. The method includes passing a signal through a plurality of drill pipe in the wired drill pipe (WDP) telemetry system, receiving the signal from the... | 09/27/2005 |
| 6556144 | Method and apparatus for data communication with an underground instrument package A data communication system is provided for communicating with an underground instrument package positioned on a drilling apparatus. The drilling apparatus has an insulated section between first and second conductive sections. The system includes a power ... | 04/29/2003 |
| 6478087 | Apparatus and method for sensing the profile and position of a well component in a well bore A method and apparatus for sensing the profile and position of a well component in a well bore and transmitting this information to a surface mounted display unit to aid an operator in performing subsea well operations. The apparatus includes an instrumen... | 11/12/2002 |
| 6301551 | Remote pile driving analyzer A pile driving analyzer (PDA) which obtains, processes and stores pile driving data. The PDA is operable as an independent self-contained unit, or may be used in conjunction with a remote computer system. Position data indicative of the position of a pile... | 10/09/2001 |
| 6188327 | Subsea electronic tagging and monitoring systems A system for tagging and monitoring subsea installations such as valves used in hydrocarbon production includes a torque tool provided with a read/write head for inductive interaction with a data storage capsule on a valve installation, the capsule storin... | 02/13/2001 |
| 5541587 | System for determining the true depth of an electrical logging tool within a wellbore The present invention is a system for determining the depth of a logging tool attached to a cable extended into a wellbore penetrating an earth formation. In a preferred embodiment, the system includes a circuit for generating a measurement of phase shift... | 07/30/1996 |
| 5278549 | Wireline cycle life counter A wireline monitor performs the following tasks: it gives an alarm at a predetermined percentage of cycle life and can give a reading of the percentage of cycle life at any point on the wire; an alarm sounds when the weight on the wire exceeds the rated weight; it ... | 01/11/1994 |
| 5204673 | Borehole televiewer system depth encoding and decoding method A method and an apparatus for recording the depth of a well logging apparatus is provided. The method and apparatus include the direct acquisition of broad depth information from the logging system conversion of the broad depth information to an acceptabl... | 04/20/1993 |
| 5194859 | Apparatus and method for positioning a tool in a deviated section of a borehole Apparatus and method for positioning a tool, such as a surveying instrument, in the deviated section of a borehole includes a flexible rod and a positioning assembly. The flexible rod extends from the vertical section into the deviated section of the bore... | 03/16/1993 |
| 5191326 | Communications protocol for digital telemetry system The present invention relates to a communications protocol for a digital telemetry system which enables more efficient digital data transmission between a plurality of digital communications nodes. The protocol is implemented using uplink and downlink pac... | 03/02/1993 |
| 5099236 | Borehole televiewer system depth encoding and decoding method A method and an apparatus for recording the depth of a well logging apparatus is provided. The method and apparatus include the direct acquisition of broad depth information from the logging system conversion of the broad depth information to an acceptabl... | 03/24/1992 |
| 5091725 | Well logging tool and system having a switched mode power amplifier A logging tool (22) for use in measuring underground parameters and transmitting electromagnetic energy (38) through the lithosphere (16) is disclosed. The logging tool (22) includes a CPU-controlled data acquisition circuit (44-56) to measure down-hole p... | 02/25/1992 |
| 5062048 | Stretch corrected wireline depth measuring error and log quality indicator method and apparatus A stretch corrected wireline depth measuring system is set forth including method and apparatus. It forms a log quality indication which indicates those occasions where the tool velocity is outside acceptable limits. The apparatus utilizes calibrated enco... | 10/29/1991 |
| 5010333 | Advanced digital telemetry system for monocable transmission featuring multilevel correlative coding and adaptive transversal filter equalizer The present disclosure is directed to an improved telemetry system and data recovery telemetry receiver apparatus for installation with a logging cable supported sonde. In the sonde, a data stream is modulated onto a carrier after conversion by an encoder... | 04/23/1991 |
| 4803479 | Electrical phase measurement means and method for accurate determination of well logging cable length A method and apparatus for determining the vertical location of a logging tool in a wellbore is disclosed. An electrical signal is transmitted through a conductor in a well logging cable and a second conductor in the surface. Change in length of the well ... | 02/07/1989 |
| 4567759 | Method and apparatus for producing an image log of a wall of a borehole penetrating an earth formation A technique is described for producing an image log of an investigation of the wall of a borehole with a high resolution tool. The tool employs sensors for measuring a characteristic such as the conductivity of the wall at locations which circumferentiall... | 02/04/1986 |
| 4538248 | Recording system for a borehole logging tool A borehole logging system includes a borehole logging tool, a logging tool depth encoder for indicating rate of movement of the logging tool, a moving recording medium, and a recording encoder for indicating the actual rate of movement of the recording me... | 08/27/1985 |
| 4450539 | Apparatus for measuring the relative position of a downhole tool in a bore hole An apparatus for accurately determining the relative positioning of a well logging sonde or downhole tool in a bore hole is disclosed. The apparatus comprises an anchor for engaging the wall of the bore hole in fixed position and adapted to be carried int... | 05/22/1984 |
| 4415895 | Well logging data transmission system A telemetering system provides improved cable utilization and bi-directional digital communication between a logging sonde and surface electronics over a single balanced transmission line of a multi-conductor logging cable, with significant signal crossta... | 11/15/1983 |
| 4327412 | Well logging data processing technique In accordance with an illustrative embodiment of the invention, a technique is set forth for determining a displacement between two or more well logs separately derived from investigating devices passed through a borehole. More particularly, displacements... | 04/27/1982 |
| 4310887 | Verification and calibration of well logs and reconstruction of logs Disclosed is a machine implemented method of utilizing existing log data from one or more boreholes in a field to find out what zero shift, if any, may be necessary in order to calibrate a log from a borehole in the same field. In one embodiment, the disc... | 01/12/1982 |
