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8794317 Cased borehole tool orientation measurement  
Methods and related systems are described for use for determining orientation of a measurement tool in a cased borehole. The measurement tool is deployed in a cased section of a borehole. The tool...
8141635 Cased borehole tool orientation measurement  
Methods and related systems are described for use for determining orientation of a measurement tool in a cased borehole. The measurement tool is deployed in a cased section of a borehole. The tool...
8141259 Method of determining the dip of a formation  
A method of determining the dip or apparent dip of a section of a subterranean formation is described using the measurements of a borehole gravity meter and a dip-dependent model for the response...
8065813 Excavation device and profile analyses of the excavation itself and associated method  
An excavation device (1) and profile analysis of the excavation includes a device (1) realizing excavations of prismatic shape and having a frame (3) and a plurality of excavation wheels (2). The...
8061047 Active positioning of downhole devices using spherical motors  
Methods and related systems are described for downhole positioning of sensors such as accelerometers, gyroscopes, tiltmeters and geophones. The sensor or sensors are mounted within the spherical...
7975392 Downhole tool  
Tools and methods for subsurface operations. Circuit arrangements providing a damping effect against undesired vibration effects on inertial data signals derived from inertial sensors disposed in...
7921573 Monitoring verticality of a sinking caisson  
A method of monitoring verticality of a sinking caisson having a tip. A pole is inserted into the earth to a pole depth substantially corresponding to a desired final depth of the caisson tip, one...
7685732 Orientation sensing apparatus and a method for determining an orientation  
An orientation sensing apparatus includes a rotatable first member, an orientation sensor device fixed with the first member for generating orientation data relating to an orientation sensor...
7530176 Method and apparatus for monitoring element alignment  
The present invention relates to a method of measuring the difference in alignment between a first plan position of an element (1) and a second plan position of an element, the method comprising...
7475486 Creep determination technique  
A method for determining an amount of creep for a tool on a cable and positioned in a well at an oilfield. The method includes moving a winch at a surface of the oilfield to effect movement of the...
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...
7347003 Device to measure axial displacement in a borehole  
A device to measure minute displacement in rocks, including anchor deployment means, anchor registration means, and frame release means. Further including anchor units comprising a fixed anchor...
7080460 Determining a borehole azimuth from tool face measurements  
A method for surveying a subterranean borehole is provided. The method includes determining tool face angles at first and second longitudinal positions in the borehole. The method further includes...
6860029 Length adjustable tool for aligning boring bar  
An alignment tool for adjustably positioning a boring bar relative to a spaced apart fixed location on a structural member including an elongated bar formed of a plurality of axially aligned and...
6704436 Method of obtaining a developed two-dimensional image of the wall of a borehole  
The invention relates to a method of obtaining a developed two-dimensional image of the wall of a borehole. The method comprises the steps consisting in: measuring a primary physical magnitude in...
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...
6339886 Remotely measured caliper for wellbore fluid sample taking instrument  
An apparatus for measuring the internal diameter of a wellbore for a wireline formation sample taking instrument, including an hydraulically actuated probe and back up shoe for selective...
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...
6065218 Method and apparatus for logging non-circular boreholes  
The invention relates to a logging method and apparatus adapted for use in non-circular boreholes which, in one embodiment, comprises the use of a first and a second sonde, each sonde having: a...
6026582 Methods and apparatus for mapping pipe and valve bores in a nuclear reactor  
Methods and apparatus for mapping pipe and valve bores in a reactor pressure vessel (RPV) of a nuclear reactor are described. In one embodiment of the apparatus, a main bar and an adjustable chuck...
6021577 Borehole surveying  
PCT No. PCT/GB96/02236 Sec. 371 Date Mar. 16, 1998 Sec. 102(e) Date Mar. 16, 1998 PCT Filed Sep. 10, 1996 PCT Pub. No. WO97/10413 PCT Pub. Date Mar. 20, 1997A borehole survey is conducted at a...
5903147 Eddy current array inspection device for shaped holes  
An eddy current device for inspecting a component, such as a closed surface area of a gas turbine engine or the like, includes an eddy current array circuit having an active face for positioning...
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...
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...
5548900 Measuring instruments  
In a downhole measuring caliper for oil well casings, comprising a circumferential array of radially extensible sensing fingers (30) between upper and lower sets of centralizing arms, the fingers...
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...
5469736 Apparatus and method for measuring a borehole  
An apparatus and a method are provided for measuring the caliper of a borehole, and the standoff of a drilling tool from the walls of a borehole during a drilling operation. The apparatus includes...
5442284 Process for inspecting spacers of heat exchanger tubes in a heat exchanger  
In a method of inspecting heat exchanger tubes of a heat exchanger in which the heat exchanger tubes are fixed in position by spacers and serve to transfer heat from a first medium to a second...
5398421 Method for connecting magnetic measurements performed in a well through a measuring device in order to determine the azimuth thereof  
A measuring tool including a device (4) for measuring the terrestrial magnetic field is inserted in a drill string (2) linking a drilling tool (3) to a surface installation. The method allows to...
5329691 Hole probe apparatus  
In an automatic fastening machine 10 comprising a frame 12 for operating a workpiece 16 along a work centerline and having a drilling tool for drilling a hole in the workpiece, a bucking ram 26,...
5155916 Error reduction in compensation of drill string interference for magnetic survey tools  
A method for determining the orientation of the axis of a borehole with respect to an earth-fixed reference coordinate system at a location in the borehole comprising the steps of: measuring two...
5128867 Method and apparatus for determining inclination angle of a borehole while drilling  
A method and apparatus is presented for determining the inclination angle of a borehole being drilled, the data for determining the inclination angle being obtained while the drillstring is rotating.
5012412 Method and apparatus for measurement of azimuth of a borehole while drilling  
A method and apparatus is presented for measuring the azimuth angle of a borehole being drilled, the data for determining the azimuth angle being obtained while the drillstring is rotating.
4992735 System and method for inspecting metallic plugs in heat exchanger tubes using a radially extendible probe  
An apparatus and a method for remotely inspecting the interior walls of a cavity having a circular cross section that varies in diameter, such as the interior of a hollow tube plug. The apparatus...
4956921 Method to improve directional survey accuracy  
A method is proposed for better determining the azimuth and inclination of a borehole in which a priori information regarding the magnitude of the earth's gravitational field strength, its...
4935883 Apparatus and method for leveling a gravity measurement device  
Apparatus and method for establishing a level plane and with respect to the level plane, vertically aligning an acceleration sensitive axis of a gravity measurement device (10). The gravity...
4930223 Bend detector pig  
A pipeline bend detector pig for measuring the changes in direction of a pipeline having a first pig body assembly with an imaginary longitudinal axis and spaced apart resilient cups for...
4852262 Gauge for in situ measurement of borehole diameter  
A gauge for measuring in situ the diameter of a borehole in salt or other ft creeping rock types is provided so that changes in borehole structure can be detected. The gauge comprises a...
4851773 Rotating head profilometer probe  
An electro-mechanical eddy current probe having a rotatable sensing head for sensing the wall thickness of and locating local defects in a tube or conduit through which it is passed. The rotatable...
4835876 Instrument chassis and body supports for pipeline survey pig  
A pipeline survey pig includes an elongated hollow pig body having an enclosure for supporting a generally cylindrical tubular instrument chassis which, in turn, supports an inertial reference...
4799391 Method for surveying fluid transmission pipelines  
A pipeline survey pig including an onboard inertial reference unit and signal processing units for receiving acceleration and angular velocity signals generated by the inertial reference unit,...
4780962 Pipeline bend verification pig  
A pipeline pig device comprises a longitudinal housing of given length, having adjacent each end a substantially centralizing packer or seal by which pipeline fluids may be used to propel the...
4761889 Method for the detection and correction of magnetic interference in the surveying of boreholes  
A method is presented, for use in borehole drilling, for correcting errors in azimuth determination resulting from variations in the earth's magnetic field to which a measuring instrument is...
4698911 Method of using a borehole televiewer dipmeter for determining true dip and azimuth  
A method for determining the true dip and azimuth of bedding planes in a formation penetrated by a borehole using borehole televiewer measurements. The method corrects for borehole deviation and...
4682421 Method for determining the azimuth of a borehole  
A method for eliminating the influence of drill string magnetization on an azimuth measurement made by a magnetometer package disposed in the drill string. The method comprises first eliminating...
4677865 Pipe pig with running gear  
A pipe pig for traveling through a pipe line is supported on and moved by two or three runners, which also can move circumferentially on the inside of the pipe to alter the angular position of the...
4672752 Method of determining the difference in borehole azimuth at successive points  
A borehole survey instrument has a probe with a polarized light system for transmitting a signal representing the angular orientation of the probe to the surface. Light from a source in the probe...
4625165 Tube inspection probe with rotating eddy current coil  
An electro-mechanical eddy current probe having a rotatable sensing head for sensing the wall thickness of and locating local defects in a tube or conduit through which it is passed. The rotatable...
4559713 Azimuth determination for vector sensor tools  
This invention relates to mapping or survey apparatus and methods, and more particularly concerns derivation of the azimuth output indications for such apparatus in a borehole from the outputs or...
4524526 Apparatus and method for inertial measurement of pipeline deflection  
Apparatus and a method for detecting deflections along the length of a pipeline. A plurality of measurements of inertial attitude are made along the length of the pipeline over time by means of...

Matches 1 - 50 out of 81 1 2 >