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| Number | Title | Issue Date |
| 7884736 | Common interface architecture for horizontal directional drilling machines and walk-over guidance systems A system and method of interfacing a drilling machine with one of a number of different walk-over guidance systems involves receiving an ID signal from a particular walk-over guidance system selected for use with the drilling machine. A protocol library associated w... | 02/08/2011 |
| 7347284 | Apparatus and method for hard rock sidewall coring of a borehole The present invention is directed to an apparatus and method for coring a borehole in a hard rock sidewall of a well bore in a subterranean formation for testing purposes. The apparatus includes a drive motor for operation down hole, a flexible drive shaft coupled t... | 03/25/2008 |
| 7225885 | Boring tool control using remote locator A drilling system performs underground boring using a drill rig and a boring tool which is configured for moving through the ground under control of the drill rig to form an underground bore. A monitoring arrangement, forming part of the system, includes a detection... | 06/05/2007 |
| 7218244 | Common interface architecture for horizontal directional drilling machines and walk-over guidance systems A system and method of interfacing a drilling machine with one of a number of different walk-over guidance systems involves receiving an ID signal from a particular walk-over guidance system selected for use with the drilling machine. A protocol library associated w... | 05/15/2007 |
| 7191850 | Formation dip geo-steering method A method of drilling a well includes calculating and estimating the dip angle, wherein said estimated dip angle being based on offset well data, seismic data, core data, pressure data. Next, the method includes drilling a well with a logging while drilling tool usin... | 03/20/2007 |
| 7182151 | Apparatus and method for horizontal drilling An apparatus and method for horizontally drilling for detecting subsurface features and avoiding such features during closed-loop control of an underground drilling machine. A horizontal drilling system includes a base machine capable of propelling a drill pipe rota... | 02/27/2007 |
| 7134512 | Method of downhole drilling and apparatus therefor A downhole drilling apparatus suspended by tubing includes a drill bit driven by an electric motor powered by a cable means. The motor is mounted upon a hollow shaft which allows fluid to pass through, so that a fluid circuit along the tube and back along the annulu... | 11/14/2006 |
| 7083392 | Pump and pump control circuit apparatus and method A method and apparatus for a pump and a pump control system. The apparatus includes pistons integrally formed in a diaphragm and coupled to the diaphragm by convolutes. The convolutes have a bottom surface angled with respect to a top surface of the pistons. The app... | 08/01/2006 |
| 7046165 | Method for collecting geological data ahead of a drill bit A casing sensor and methods for sensing using a casing sensor are disclosed. The casing sensor includes a casing shoe and a sensor coupled to the casing shoe. A casing data relay includes a downhole receiver coupled to a well casing and a transmitter coupled to the ... | 05/16/2006 |
| 7003439 | Interactive method for real-time displaying, querying and forecasting drilling event and hazard information A method is disclosed for characterizing a drilling hazard. The method includes determining a well plan including at least a wellbore trajectory. A likelihood of occurrence of at least one drilling hazard is estimated. A severity of the at least one drilling hazard ... | 02/21/2006 |
| 6988566 | Acoustic position measurement system for well bore formation An acoustic position measurement system and method includes an acoustic transmitter operable to transmit a sound wave into an underground well bore in a target formation. The sound wave is configured to reflect from a boundary formation proximate the target formatio... | 01/24/2006 |
| 6968735 | Long range data transmitter for horizontal directional drilling An apparatus for monitoring conditions in subterranean borehole during drilling and pullback operations in real time. The apparatus includes a drill string having a working end. A measurement system suitable for measuring at least one operational characteristic of t... | 11/29/2005 |
| 6935439 | Boring tool control using remote locator A drilling system performs underground boring using a drill rig and a boring tool which is configured for moving through the ground under control of the drill rig to form an underground bore. A monitoring arrangement, forming part of the system, includes a detection... | 08/30/2005 |
| 6886644 | Apparatus and method for horizontal drilling An apparatus and method for horizontally drilling provides for detecting subsurface features and avoiding such features during closed-loop control of an underground drilling machine. A horizontal drilling system includes a base machine capable of propelling a drill ... | 05/03/2005 |
| 6873947 | Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance A method for simulating the drilling performance of a roller cone bit drilling an earth formation may be used to generate a visual representation of drilling, to design roller cone drill bits, and to optimize the drilling performance of a roller cone bit. The method... | 03/29/2005 |
| 6854535 | Bore location system and method of calibration A method for calibrating a pitch measurement of a horizontal underground bore location system includes providing a probe having a pitch sensor that measures deviation between a predetermined orientation and a measurement axis. A receiver has an antenna that detects ... | 02/15/2005 |
| 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 produce a horizontal bore. A transmit apparatus is provided with the dril... | 12/21/2004 |
| 6791469 | Method of drilling in response to looking ahead of the bit A method for improving ROP and reducing hazards in drilling subterranean wells by using an acoustical system 15 to look ahead of the drill bit 14, detects and analyzes geologic features ahead of the bit 14 which may be qualified as drilling haza... | 09/14/2004 |
| RE38567 | Apparatus and method for self adjusting downlink signal communication An apparatus for sending signals downhole during drilling operations uses a main pump to pump mud from a mud pit at a substantially constant flow rate. The bulk of the pumped mud goes downhole to maintain adequate circulation for the drill bit. A bypass pipe is prov... | 08/24/2004 |
| 6766869 | Remote lock-out system and method for a horizontal directional drilling machine A remote lock-out system and method are employed with a drilling machine. The remote lock-out system includes a remote lock-out override controller capable of interrupting a drilling operation of the drilling machine. The remote lock-out override controller includes... | 07/27/2004 |
| 6688408 | Auger drill directional control system An auger drill directional control system includes a positional transmitter mounted on a drillhead at the front of a pipe, the positional transmitter transmitting directional and pitch signals to a positional receiver disposed above the grade at the desir... | 02/10/2004 |
| 6516293 | Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance A method for simulating the drilling performance of a roller cone bit drilling an earth formation may be used to generate a visual representation of drilling, to design roller cone drill bits, and to optimize the drilling performance of a roller cone bit.... | 02/04/2003 |
| 6480118 | Method of drilling in response to looking ahead of drill bit A method for improving ROP and reducing hazards in drilling subterranean wells by using an acoustical system 15 to look ahead of the drill bit 14, detects and analyzes geologic features ahead of the bit 14 which may be qualified as drilling hazards 17. De... | 11/12/2002 |
| 6435286 | Apparatus and method for detecting a location and an orientation of an underground boring tool An apparatus and method for determining a location and an orientation of an underground boring tool by employment of a radar-like probe and detection technique. The boring tool is provided with a device which generates a specific signature signal in respo... | 08/20/2002 |
| 6408952 | Remote lock-out system and method for a horizontal direction drilling system Systems and methods for remotely altering operation of a horizontal directional drilling machine provide for remotely disabling movement of a drill string coupled to a cutting head or reamer and, in addition, disabling dispensing of fluid, foam and/or air... | 06/25/2002 |
| 6279668 | Boring tool control using remote locator including a command generation arrangement and method A locating and control arrangement forms part of a drilling apparatus which also includes a boring tool that emits a locating signal. The locating and control arrangement is used for locating and controlling underground movement of a boring tool which is ... | 08/28/2001 |
| 6188222 | Method and apparatus for measuring resistivity of an earth formation The method and apparatus of the invention determines earth formation resistivity at extended depths into the formation by the use of telemetry transmission signals to measure the formation resistivity. The telemetry transmission signals carry measurement ... | 02/13/2001 |
| 6166654 | Drilling assembly with reduced stick-slip tendency A system for drilling a borehole in an earth formation is disclosed, the system comprising a first sub-system including a drill string extending into the borehole, and a second sub-system including a drive system for driving the drill string in rotation a... | 12/26/2000 |
| 6161630 | Apparatus and method for controlling an underground boring tool An apparatus and method for determining a location and an orientation of an underground boring tool by employment of a radar-like probe and detection technique. The boring tool is provided with a device which generates a specific signature signal in respo... | 12/19/2000 |
| 6079506 | Boring tool control using remote locator A locator/control arrangement forms part of a drilling apparatus which also includes a boring tool that emits a locating signal. The locator/control arrangement is used for locating and controlling underground movement of a boring tool which is operated f... | 06/27/2000 |
| 6057784 | Apparatus and system for making at-bit measurements while drilling The system of the present invention includes measurement instrumentation that is located in or near the drill bit and used in a measuring-while-drilling system. The instrumentation can be located in a bit box, an extended sub between the drilling motor as... | 05/02/2000 |
| 5963138 | Apparatus and method for self adjusting downlink signal communication An apparatus for sending signals downhole during drilling operations uses a main pump to pump mud from a mud pit at a substantially constant flow rate. The bulk of the pumped mud goes downhole to maintain adequate circulation for the drill bit. A bypass p... | 10/05/1999 |
| 5646611 | System and method for indirectly determining inclination at the bit The present invention discloses an MWD system which permits an indirect measurement of the wellbore inclination angle at the drill bit, in situations where it is difficult or expensive to measure that angle directly. The system includes a first inclinomet... | 07/08/1997 |
| 5602541 | System for drilling deviated boreholes Improved techniques are provided for drilling a deviated borehole through earth formations utilizing a rotary bit powered by a drill motor, and for obtaining information regarding the borehole or earth formations. A sensor permanently positioned in the dr... | 02/11/1997 |
| 5493288 | System for multidirectional information transmission between at least two units of a drilling assembly System for transmitting information between at least two units of a drilling assembly by means of an electrical link along the drill string. The system of the invention provides for multidirectional transmission between the units.... | 02/20/1996 |
| 5469155 | Wireless remote boring apparatus guidance system Guidance system for an underground boring device that includes a receiver for signals from a signal generator associated with an underground boring head. A wireless transmitter is provided for transmitting the information about the boring head from a bori... | 11/21/1995 |
| 5410303 | System for drilling deivated boreholes Improved techniques are provided for drilling a deviated borehole through earth formations utilizing a rotary bit powered by a drill motor, and for obtaining information regarding the borehole or earth formations. A sensor permanently positioned in the dr... | 04/25/1995 |
| 5294923 | Method and apparatus for relaying downhole data to the surface An apparatus and method for the transmission of information between downhole and surface locations through a drillstring. The apparatus includes a wireline extending from instrumentation at the downhole location to a clamp-off sub in the drillstring where... | 03/15/1994 |
| 4884847 | Apparatus and method for mapping entry conditions in remote mining systems The method and apparatus for mapping mine excavation or tunnel entry conditions by mounting an array of sensors on a vehicle some of which provide knowledge of the vehicle location in the entry and others of which provide knowledge of entry conditions and... | 12/05/1989 |
| 4812812 | Apparatus and method for determining the position and orientation of a remote object An apparatus and method for determining the position and orientation of a remote object in relation to an observation point comprises a transmitter for sending a magnetic field signal and a receiver for receiving and analyzing the magnetic field signal. T... | 03/14/1989 |
