Matches 1 - 25 out of 25


Match Document Document Title
8655104 Cyclic noise removal in borehole imaging  
A method for removing cyclic noise from a borehole image includes transforming the image into the frequency domain using a two-dimensional (2-D) Fourier Transform, removing cyclic noise components...
8462012 Anti-collision method for drilling wells  
Methods for drilling a new well in a field having a plurality of existing cased wells using magnetic ranging while drilling are provided. In accordance with one embodiment, a method of drilling a...
8350716 System and method for communicating data between wellbore instruments and surface devices  
A method for communicating signals between an instrument in a wellbore and a device at the Earth's surface using a wired drill pipe telemetry channel includes allocating signals generated by at...
7495445 Flux orientation locating in a drilling system  
An above ground locator includes an apparatus for determining the strength of the locating signal at a selected point relative to the boring tool. The apparatus includes an antenna arrangement...
7116244 Method and system for producing a magnetic field signal usable for locating an underground object  
Transmitted magnetic field signals useable for locating an underground object, and methods and systems for generating the same. The magnetic field signal has desired spectral characteristics. More...
7002484 Supplemental referencing techniques in borehole surveying  
A method for surveying a borehole is disclosed which uses first and second gravity measurement devices disposed at corresponding first and second positions in the borehole and a supplemental...
6850161 Systems and methods for identifying and mapping conduit location  
A system (100) for mapping an underground object (145) includes a conduit location recording device 105 and a server (115). The conduit location recording device (105) senses an underground object...
6833795 Underground utility detection system and method employing ground penetrating radar  
An apparatus and method are employed to detect underground objects for use with a horizontal directional drilling (HDD) machine. A drill pipe is configured to cooperate with the HDD machine to...
6417666 Boring tool tracking system and method using magnetic locating signal and wire-in-pipe data  
A system is described in which a boring tool is moved through the ground in a region using a drill rig and associated drill string to move the boring tool in a forward direction or in a reverse...
5880680 Apparatus and method for determining boring direction when boring underground  
A guidance module for an underground horizontal boring assembly. The module determines the pitch angle of the boring tool independent of roll using a single accelerometer sensor. The accelerometer...
5819859 Apparatus and method for detecting an underground structure  
An apparatus and method for locating an underground object or structure by employment of a radar-like probe and detection technique is disclosed. The underground structure is provided with a...
5720354 Trenchless underground boring system with boring tool location  
An apparatus and method for locating an underground boring tool using a radar-like probe and detection technique. A boring tool is provided with a device which generates a specific signature...
5585726 Electronic guidance system and method for locating a discrete in-ground boring device  
A guidance system for a drill tool (60) comprising a primary navigation package (80) and a secondary navigation package (74). The primary navigation package contains a triaxial magnetometer and a...
5258755 Two-source magnetic field guidance system  
A magnetic field guidance system for guiding a movable carrier such as a drill assembly with respect to a fixed target includes a pair of magnetic field sources at one location, such as the...
4881083 Homing technique for an in-ground boring device  
The homing technique for directing an in-ground boring device through the ground from its particular location to a specific target point is disclosed herein. In accordance with this technique, an...
4700142 Method for determining the location of a deep-well casing by magnetic field sensing  
Logging apparatus for measuring alternating magnetic fields generated by electric current flow on a subterranean target near a borehole is disclosed. Electric current of a predetermined temporal...
4646277 Control for guiding a boring tool  
A control system guides a boring tool in a borehole. The tool has a longitudinal tool axis and includes a driver for advancing the tool axially through the earth and steering mechanism for...
4637480 Azimuth measuring method for non-vertical drilling  
In a method of measuring azimuth for non-vertical drilling, during rotation of the drill pipe string two components of the magnetic field are measured continuously within a cylindrical section of...
4575014 Vertical shaft impact crusher rings  
A vertical shaft impact crusher is provided, having a cylindrical tank in which the rotor is mounted for rotation about a vertical axis and for receiving rock fed axially from above and having...
4361192 Borehole survey method and apparatus for drilling substantially horizontal boreholes  
A borehole survey method and apparatus for use in drilling substantially horizontal boreholes through a mineral deposit wherein a dip accelerometer, a roll accelerometer assembly and a fluxgate...
4337392 Position detector for a power rodding apparatus  
A power rodding apparatus is often used in conjunction with laying telephone cable through underground conduits. For such applications the exact location of the end of the rod is important and is...
4181014 Remote well signalling apparatus and methods  
Information is conducted upwardly from a location deep within a well by a transmitter which is located in the well and induces electrical currents in the surrounding earth formation. These...
3900878 Mine rescue system  
A mine rescue system for locating trapped miners following a mine disaster. A transmitting device deployed by the trapped miners transmits a signal at a frequency below 3 kHz. The phase of the...
3746106 BORING BIT LOCATOR  
A bore pipe is rotatably driven to dirve a horizontal bore below the earth's surface, and radio energy transmitted from a locator device is monitored on the ground surface by means of a radio...
3285350 Method and apparatus for controllably drilling off-vertical holes  

Matches 1 - 25 out of 25