Matches 1 - 50 out of 144 1 2 3 >
Match Document Document Title
7599797 Method of mitigating risk of well collision in a field  
A method and system for mitigating risk of well collision in a field includes receiving an anti-collision standard exemption request containing a description of risk of collision between a subject...
7528946 System for detecting deflection of a boring tool  
A system for monitoring deflection of a downhole tool assembly. The system comprises a beam source directing a beam at a receptor positioned proximate the downhole tool assembly. The receptor...
7386942 Method and apparatus for mapping the trajectory in the subsurface of a borehole  
An apparatus for determining the orientation of a borehole at a point along the borehole, includes a tiltmeter for measuring the inclination of the borehole relative to the vertical, a vector...
7363717 System and method for using rotation sensors within a borehole  
A system and method for using a survey tool within a borehole is provided. The survey tool includes a plurality of rotation sensors each having a sensing axis and a direction of least acceleration...
7353613 Directional sensor system comprising a single axis sensor element positioned at multiple controlled orientations  
A directional sensor system that incorporates a single axis sensor element that is manipulated to a plurality of orientations. The resulting responses of the sensor element at these locations are...
7260477 Estimation of borehole geometry parameters and lateral tool displacements  
A method for determining a borehole geometry parameter vector and/or lateral tool displacement vectors in a borehole is provided. The method includes acquiring at least one set of standoff...
7225550 System and method for using microgyros to measure the orientation of a survey tool within a borehole  
A system and method for determining an orientation of the survey tool within a borehole utilizes a survey tool including a plurality of rotation sensors each having a sensing axis and a direction...
7143521 Determination of borehole azimuth and the azimuthal dependence of borehole parameters  
A method for determining a borehole azimuth in a borehole is disclosed. In one exemplary embodiment, the method includes acquiring at least one standoff measurement and a tool azimuth measurement...
7117605 System and method for using microgyros to measure the orientation of a survey tool within a borehole  
A system and method for determining an orientation of the survey tool within a borehole utilizes a survey tool including a plurality of rotation sensors each having a sensing axis and a direction...
7103982 Determination of borehole azimuth and the azimuthal dependence of borehole parameters  
A method for determining a borehole azimuth in a borehole is disclosed. In one exemplary embodiment, the method includes acquiring at least one standoff measurement and a tool azimuth measurement...
7047653 Depth correction  
A method of determining the depth of equipment in an underground borehole, the equipment being suspended in the borehole by means of a cable extending from the surface into the well, comprises: (i)...
7028409 Method for computation of differential azimuth from spaced-apart gravity component measurements  
A method is provided for computing the differential azimuth between two sets of spaced-apart gravity component measurement devices in a borehole, employing multiple rotation angles. The method...
6985814 Well twinning techniques in borehole surveying  
A method for surveying a borehole is provided. The method includes providing a tool having a magnetic field measurement device disposed thereon and positioning the tool in a borehole. Magnetic...
6929075 Automated bore planning system for horizontal directional drilling  
Systems provide for electronic development of a bore plan for use in connection with an underground boring machine. Electronically developing a bore plan involves providing topographical...
6918186 Compact navigation system and method  
A compact navigation system for a rover is provided. The navigation system includes a housing configured to be transported by the rover; a gimbal system having two or more gimbals that includes at...
6871410 Autonomous apparatus and method for acquiring borehole deviation data  
An autonomous down hole survey tool and method for determining deviation angles of a well bore while tripping. The instrument package assembly is carried in a commercially available running gear...
6854192 Surveying of boreholes  
A borehole drilling and survey assembly includes a drill string of magnetic material, a non-magnetic drill collar, and a non-magnetic rotary drilling system including a drill bit. A near-bit survey...
6845563 Method and device for the measurement of the drift of a borchole  
A device and a method for the measurement of the angle of drift of a borehole that extends from the surface of the ground downwardly into the earth. The device comprises a generally hollow...
6842990 Inclinometer system  
The invention relates to a device for measuring lateral displacement of a casing in a vertical bore and includes an inclinometer probe, a cable, and a cable reel with electronics mounted in the...
6823602 Continuous measurement-while-drilling surveying  
A continuous measurement-while-drilling surveying apparatus includes a fiber optic gyroscope sensitive to rotation about the tool spin axis of the bottom hole assembly and a second fiber optic...
6749029 Automated bore planning method and apparatus for horizontal directional drilling  
A system and method provide for electronic development of a bore plan for use in connection with an underground boring machine. Electronically developing a bore plan involves providing...
6659196 Core orientation  
An upper end ( 10 ) for the inner tube of a core drill has a marking device comprising a pendulum ( 350 ) or hard ball ( 30 ) which runs in a circumferential track ( 24 ). The marking device...
6633816 Borehole survey method utilizing continuous measurements  
A borehole survey method is provided for processing continuous measurements of the earth's magnetic and gravitational fields obtained while drilling a borehole. The present invention improves...
6631563 Survey apparatus and methods for directional wellbore surveying  
Wellbore survey methods and apparatus for wireline and measurement-while-drilling operations are disclosed which include a gyroscope, wherein the gyroscope has a spin axis, aligned with the...
6530154 Method to detect deviations from a wellplan while drilling in the presence of magnetic interference  
A method for drilling a wellbore to assure the avoidance of a substantially adjacent known magnetic source comprising the steps of obtaining survey data for the path or trajectory of a known...
6508316 Apparatus to measure the earth's local gravity and magnetic field in conjunction with global positioning attitude determination  
The present invention provides a method for determining magnetometer errors during wellbore survey operations. It is capable of determining errors on up to three axes, with or without the use of an...
6487782 Method and apparatus for use in creating a magnetic declination profile for a borehole  
A method and apparatus for use in creating a magnetic declination profile for a borehole. The method includes the steps of making a magnetic directional measurement at a longitudinal location in...
6480119 Surveying a subterranean borehole using accelerometers  
A method and apparatus for surveying a subterranean borehole is disclosed which uses two sets of accelerometers joined by a joining structure which prevents relative rotation between the two sets,...
6453239 Method and apparatus for borehole surveying  
The invention is, in its various aspects, a method and apparatus useful for strapdown inertial navigation and surveying in a borehole. The method comprises maneuvering a probe including three...
6381858 Method for calculating gyroscopic wellbore surveys including correction for unexpected instrument movement  
A method for calculating a gyroscope survey is disclosed. The method includes measuring outputs of gyroscopes and accelerometers in a survey instrument. An instrument rotational movement is...
6321456 Method of surveying a bore hole  
A method for determining azimuth in well bore hole where the well is being drilled utilizing Measurement-While-Drilling (MWD) equipment, including gravitometer and magnetometer instruments in the...
6179067 Method for magnetic survey calibration and estimation of uncertainty  
The present invention provides a method for determining magnetometer errors during wellbore survey operations. It is capable of determining errors on up to three axes, with or without the use of an...
6108921 Scraper for determining the position of pipelines  
Scraper for determining the position of pipelines with at least one scraper body and on the outer circumference of the latter are provided support elements for guiding in the pipeline, the scraper...
6076268 Tool orientation with electronic probes in a magnetic interference environment  
An apparatus and method for orienting directional tools within a bore hole by recognizing and compensating for field biases brought about by ferromagnetic anamolies surrounding the bore hole,...
6068394 Method and apparatus for providing dynamic data during drilling  
The present disclosure is directed to both a method and apparatus for providing data dynamically during the drilling of a borehole. This invention can be used with drilling apparatus which is...
6065219 Method and apparatus for determining the shape of an earth borehole and the motion of a tool within the borehole  
A method and apparatus are provided for estimating the cross-sectional shape and orientation of an earth borehole and the motion of a tool therein. The method and apparatus involve measuring the...
6041509 Method and device for determining a space position of the axis of a cased well  
The essence of the proposed method resides in that assumed as the datum point of measurement of the well azimuth is an azimuthally stabilized housing of a down-the-hole inclinometer and the...
6021577 Borehole surveying  
5929540 Switching circuit for switching the mode of operation of a subterranean probe and method of switching  
A switching circuit for use in a subterranean probe for switching between to two modes of operation used to perform a survey of a well borehole. The switching circuit comprises a first voltage bias...
5821414 Survey apparatus and methods for directional wellbore wireline surveying  
A wellbore survey method and apparatus which includes a gyroscope, wherein the gyroscope has a spin axis, aligned with the instrument axis, and further having two sensitive axis orthogonally...
5806195 Rate gyro wells survey system including nulling system  
A method for well borehole survey is set out. A sonde supports X and Y accelerometers and X and & sensors on a rate gyro having a Z axis aligned with the sonde. On a slickline, or within a drill...
5806194 Method for conducting moving or rolling check shot for correcting borehole azimuth surveys  
A method is disclosed for correcting for the distorting effect of cross-axial magnetic interference on the readings of a well survey tool using a reduced number of measurements and measuring...
5752320 Borehole dip instrument  
A dip angle indicator for use in boreholes, and having, an elongated casing, having a diameter to fit down a desired borehole, a sensing chamber, located along the central axis of the casing and...
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...
5640780 Moving device for intervening inside small-diameter pipework  
The present invention relates to a moving device for intervening inside small-diameter pipework. The technical field of the invention lies in constructing measurement apparatus for monitoring...
5606124 Apparatus and method for determining the gravitational orientation of a well logging instrument  
A method for determining orientation of an instrument with respect to earth's gravity. The method includes measuring components of earth's gravity along mutually orthogonal axes. One of the axes is...
5543972 Mirror for producing a development picture of the wall of a borehole in the ground and device therefor  
A compound type cone mirror installed inside a sonde moving up and down in a borehole for observing the whole circumference of the hole wall at an arbitrary depth at a time, a combined mirror for...
5537753 Bore hole inclinometer apparatus  
A bore hole inclinometer device for use in core drilling employing hollow drill rods, and a core barrel, the device having, an elongated casing dimensioned to fit within the hollow drill rods, and...
5452518 Method of correcting for axial error components in magnetometer readings during wellbore survey operations  
A method is provided for deriving wellbore azimuth in a manner which reduces the impact of axial magnetic field errors, which utilizes a plurality of estimates of the axial component of the...
5435069 Method for determining borehole direction  
A method for determining the direction of a borehole during drilling comprises determination of inclination angle θ and highside angle φ from gravity acceleration (g) measurements and...
Matches 1 - 50 out of 144 1 2 3 >