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WO/1999/058816A1 |
A hydrocarbon reservoir undergoing secondary recovery is subject to a first and then at least a second gravity gradient survey in which a gravity gradiometer takes gradient measurements on the surface above the reservoir to define succes...
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WO/1999/032906A1 |
A measuring device such as a gravity gradiometer has a levitation coil (26) and a float body (12). The float body (12) is capable of being magnetically levitated by the coil (26) on a levitation axis (L) about which angular movement of t...
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WO1998050680A3 |
A method of controlling production from a wellbore (12) comprises providing a producing string (106) carrying an electrical submersible pump (114,516) for pumping wellbore fluid to the surface, said string carrying a high voltage line (5...
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WO/1998/057197A1 |
The invention concerns improvements in the performance of a mobile gravity gradient instrument (GGI). Gravity gradiometers measure one or more components of the gradient of gravity which is expressed as the gradient of a gravity vector, ...
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WO/1998/057196A1 |
This invention concerns improvements to gravity gradient instruments (GGI) and in particular to the accelerometers that are paired within these instruments. Accelerometers (1) have a proof mass (2) suspended by a spring (3) within a magn...
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WO/1998/050681A1 |
This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensor is deployed downhole to provide information about downhole conditions. Parameters related to t...
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WO/1998/050680A2 |
The present invention provides systems utilizing fiber optics for monitoring downhole parameters and the operation and conditions of downhole tools. In one system fiber optics sensors are placed in the wellbore to make distributed measur...
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WO/1998/015850A1 |
The present invention provides a method for forming wellbores. In one method, one or more wellbores are drilled along preplanned paths based in part upon seismic surveys performed from the surface. An acoustic transmitter conveyed in suc...
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WO/1998/015852A1 |
The present invention pertains to an automatic driving and working m/c driven by the gravitational and rotational forces, intended to generate oscillations and swingings in precession paths of micro- and nanodimension, as well as to an i...
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WO/1998/007046A1 |
The invention concerns a method for geodetic surveying and/or earth imaging, characterised in that a radio satellite signal reflected on the ground is picked up by a shaped-beam antenna (2) and this signal is processed, with a reference ...
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WO/1997/041459A1 |
A gravity gradiometer (1) comprising first (2) and second proof masses (4) and means (13) for providing simultaneous free flight of the proof masses under the influence of the gravitational force in which the gradient is to be measured a...
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WO/1996/010759A1 |
Apparatus for measuring gravitational fields comprising a superconducting string (1) fixed at both ends and forming part of a closed superconducting loop inductively coupled to two driving solenoids (Ld1, Ld2). Displacement of the string...
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WO/1996/007113A1 |
The invention relates to a device and a process for gravitation measurement with an acceleration sensor fitted on a moving support, a satellite navigation receiver and a computing unit in which use may be made of several acceleration sen...
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WO/1995/025266A1 |
A gravity meter (10) has a portable housing (12) for holding a corner cube retroreflector that can be dropped within the housing. The housing also holds a laser (38) and an optical fiber (74) having a first end in light communication wit...
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WO/1995/005576A1 |
A system for compensating for horizontal common-mode acceleration and tilt on a moving platform including a laboratory motion isolation table or borehole logging probe, by transforming horizontal accelerations of the platform into vertic...
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WO/1995/005614A1 |
A gravity gradiometer capable of obtaining the vertical component Tzz of the gravity gradient tensor out of the two horizontal components Txx and Tyy based on Laplace equation: Tzz = - (Txx + Tyy) comprises a single disc, and two pairs o...
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WO/1995/005615A1 |
A system for conducting an air-borne gravity survey of earth formations along the flight path of a helicopter or any other aircraft comprises an acceleration/gravity sensor assembly (AGSA) which includes at least one inertial measurement...
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WO/1994/016296A1 |
A very low amplitude microvibration sensing device, comprising an optical cavity (8) consisting of a glass plate (11) sandwiched between two three-dimensional interferometric arrays (9, 10) and contacting a body in which microvibration i...
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WO/1994/013976A1 |
Mechanical linear guide for making a body move in an axial direction, comprising a system which is preferably made up of reinforced leaf springs and/or hole-type hinges, and which is rotationally symmetrical about an axial direction and ...
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WO/1994/009384A1 |
A method of monitoring short-term and long-term deformation changes in a geological space and predicting geodynamic events, such as earthquakes, landslides, dilatations and subsidence events, in a region, said method comprising the steps...
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WO/1991/002444A1 |
The invention is a neutral atom (and/or molecule) matterwave interferometer (and/or set of interferometers) that can be used as an ultra-sensitive inertial and/or gravity sensor. A pair of interferometers with different energies and/or m...
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WO/1991/000414A1 |
A method is disclosed for determining a component of the response of a reservoir to tidal forces (such as the amplitude of variation or delay time) in a hydrocarbons reservoir. That method comprises measuring a variable responsive to tid...
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WO/1990/007131A1 |
A gravity gradiometer for measuring off-diagonal components of the gravitational gradient tensor includes a housing comprising a pair of electromagnetic shield enclosures (22, 23) arranged one inside the other, and a body (25) including ...
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WO/1989/011666A1 |
Apparatus and method for vertically aligning an acceleration sensitive axis of a gravity measurement device (10). The gravity measurement device (10) includes an accelerometer (68), which rotates about a gimbal shaft (62) within a gimbal...
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WO/1989/005462A1 |
Common mode (82) and differential mode (84) sensing coils are arranged adjacent a bottom-side surface of a portion of the proof mass (60) in one hollowed out annular portion (70) and a levitation coil (86) is arranged adjacent a bottom-s...
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WO/1988/004784A1 |
A method of making a representation of small amplitude regional variations in the position of the geoid. Natural resources having a density distinguishing from that of the surroundings in the seafloor may cause such variations in the sea...
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WO/1981/000307A1 |
To locate potentially hydrocarbon-bearing subsurface formations, tilt-meters (T1, T2, T3, T4, T5) measure the time of arrival and the apparent direction of a lunar/solar induced earth tide (24) at an array of points on the earth's surfac...
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WO/1980/001114A1 |
This invention is performed on the basis of the recognition on physics, that repulsion accelerating substances of approximately 108 (Alpha)BA 1010 g (wherein g is gravitational acceleration on the earth) to the earth are created by the e...
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JP6723111B2 |
Provided is a gravity measuring device which is capable of autonomous navigation and hovering in water and which is grounded on a body-of-water bottom to measure gravity. The gravity measuring device comprises: a gravity measuring unit f...
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JP6529735B2 |
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JP6468606B2 |
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JP2018036055A |
To provide a gravity measurement device that allows a gravity measurement in the water bottom to be stably executed without persons and ropes.A gravity measurement device, which can autonomously navigate and hover underwater, and grounds...
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JP2017138124A5 |
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JP2017526919A |
For example, since it is used as a gravity meter or Gladgio meter, an acceleration measuring device is indicated. A device has a supporter and examination weight which were mutually combined by bending part which permits displacement of ...
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JP2017138124A |
To estimate a surface layer density distribution such as applicable with a landform correction value high in spatial resolution added with a surface layer landform, a layer thickness and a density, in a space gravity deviation method sur...
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JP6175131B2 |
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JP6028193B2 |
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JP2015520858A5 |
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JP2016085114A |
To estimate the presence, depth and distribution of vertical and horizontal plate-like intrusion of hot magma or its solidified intrusive body, as well as the magnetization strength, direction and introduction era thereof, from gravity p...
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JP2015520858A |
The particle system characterized by internal vibration related to the de Broglie wave of particles by the gravity transducer, The resonance cave for carrying out the trap of the particles, without holding particles in lattice structure,...
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JP5712000B2 |
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JP5578667B2 |
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JP2014119306A |
To provide a load detection cell capable making a zero point that the load detection cell outputs more uniform than before even if the load detection cell has a position shift in its manufacture, a method of manufacturing the load detect...
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JP5519669B2 |
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JP5464491B2 |
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JP2014507636A |
A device contains the laser system (13) made to generate a plurality of laser bands, and a laser band is a base condition (5) of a plurality of above-mentioned atoms.2S1/2A hyperfine level (F1, F2) and an excitation state (5)2P3/2Hyperfi...
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JP2014507634A |
It is a leading method of the laser system of the absolute weight measuring device by the atomic interfering method which is suitable for the on-site use, and is advantageously used especially in the present invention at the geophysical ...
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JP2014504720A |
A support face (16) of a laser system (13) and a laser system (13), It is an absolute weight measuring device (10) included in the state where met perpendicularly and it has arranged a super-vacuum system (14), a recursive reflective mir...
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JP2013213716A |
To provide a low-cost multiaxial type gravity measuring sensor which can measure a relative value of a gravity change with high accuracy, which has a design tolerance, and which is easy to manufacture.A multiaxial type gravity sensor inc...
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JP2013061158A |
To provide an apparatus for measuring the gravity of the earth that is composed of: a single pendulum; a high-speed camera; and a measuring unit body for calculating the acceleration of the gravity through analysis of a camera image, acq...
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