Delivery and recovery device, method and application
SUBSTANCE: invention application describes the mechanisms and methods by which freely movable remotely operated vehicles (ROVs) can reliably capture and take on board easily controlled seismic sensors (cargo) while they are in the process of moving, using a underwater ship in the water depth. The ROV cargo can be replenished without the need to return the ROV to the underwater ship for additional cargo and without the need for heavy lifting and recovery equipment. Also, a reverse process for returning cargo from ROV to the underwater ship vessel is disclosed.
EFFECT: installation, control and removal of cargo from unstable environment are performed more efficiently and reliably.
16 cl, 26 dwg
SUBSTANCE: in seismic survey in icy water, streamers are towed behind a vessel under the water surface to avoid collision with ice. GPS readings may not be consistently obtained because the ice prevents a tail buoy with a GPS receiver from trailing from the streamer on the surface Instead, a device is towed on the streamer under the water surface. The absolute position of the streamer is tracked by intermittently bringing the towed device towards the surface so that GPS readings can be obtained. The absolute position of the streamer can then be used in conjunction with compass readings and can correlate various seismic sensor signals obtained along the streamer during the survey. The compass readings can be corrected for declination using declinometer readings, which can be compensated for iron effects from the vessel or other device carrying the declinometer.
EFFECT: high accuracy of survey data.
31 cl, 33 dwg
FIELD: physics; geophysics.
SUBSTANCE: invention relates to geophysics and can be used in seismic exploration to detect oil and gas deposits. The invention discloses a method and an apparatus for marine seismic survey using one or more movable marine seismic vibrators. The sweeping function for the vibrator is based on the criterion of allowable degradation and is a nonlinear function which performs frequency sweeping from top downwards. The obtained data can be used directly without cleaning or can be easily cleaned.
EFFECT: high accuracy of survey data.
21 cl, 11 dwg
FIELD: physics, geophysics.
SUBSTANCE: invention relates to geophysics and can be used for sea seismic works. Claimed are seismic streamer and related method of evaluation of the shape of seismic streamer controlled in transverse direction. This seismic streamer is divided into several adjacent sections of seismic streamer by control devices in transverse direction. Heading transducers arranged fore and aft of every section generate the data on heading. Every section is simulated as a rectangular fore and curved fore section. Section shape is evaluated in compliance with this model from the data on heading towards the section.
EFFECT: higher precision of trial data owing to precision of seismic streamer shape evaluation.
19 cl, 2 dwg
SUBSTANCE: disclosed is a small-size bottom seismic module, connected by a hydroacoustic link to a control station and consisting of a sealed housing, a hydrophysical module, a device for detecting geophysical signals, which includes a bottom seismometer, information storage means, a spatial orientation sensor, a radio buoy, a ballast, a ballast release, a release timer, a flash beacon, a radio beacon, an external communication socket and a power supply. The sealed housing has the shape of a hemisphere which is linked to the base of the sealed housing which is in the form of a plate, on the upper diameter of which there are mechanical elements of the ballast release, which are in the form of straps which are linked to the ballast, tightly adjoining the base of the sealed housing on its lower diameter. The means of communicating with the control station are in the form of a single-relay hydroacoustic link. The spatial orientation sensor consists of an electronic 3D compass, three accelerometers and three angular velocity measuring devices, rigidly linked to the bottom seismometer, and the bottom seismometer is in the form of a wideband molecular-electronic sensor.
EFFECT: high reliability of detected seismic signals.
SUBSTANCE: acoustic signal is emitted toward sea bottom. Signal of sound reradiation from water column is received. Gas flares are isolated from receive signal. Gas flare inclination is used to evaluate the stream velocity profile and direction. Density of gas flare sources on sea bottom and methane flow direction in water for every flare are calculated. Obtained data allows the determination of methane concentration in water column in the area of methane discharge.
EFFECT: higher efficiency and accuracy of evaluation.
SUBSTANCE: offered invention relates to measuring equipment and can be used for development and manufacture of oceanological multichannel information and measuring complexes and development of new measuring oceanological channels. The hydrological-optical-chemical complex contains a unit of hydrophysical measuring channels, a central controller, the first and second modems of the electric communication line, a conducting rope with electric and fibre-optical communication lines, a rotating electric transition, an electric winch, an operator workstation, a unit of optical measuring channels, and a unit of normalising controllers is added to it, and each hydrophysical measuring channel through the corresponding normalising controller is connected to the central controller, besides, the first and second multiport optical modems and the rotating optical transition are added, and each optical measuring channel is connected to the corresponding input of the first multiport optical modem connected through the fibre-optic communication line of the conducting rope to the rotating optical transition connected to the second multiport optical modem connected to the operator workstation. The information from the measuring channels of the hydrophysical module is processed by the normalising controllers, and in compact way by the central controller through the multiport modem is transferred to the onboard device of the probe, and also in creation of conditions for development, manufacture, laboratory and natural studies of new optical measuring channels for identification and registration of quantity of a mineral suspended matter and the weighed organic substance in sea water, integration of currently existing measuring oceanologic channels, creation of the combined channel of the electric and fibre-optical communication line between submersible and onboard devices.
EFFECT: integration in a single hydrological-optical-chemical complex of all available measuring channels of oceanological parameters.
FIELD: radio engineering, communication.
SUBSTANCE: invention relates to hydroacoustic equipment and to the creation of deployment-retrieval devices (DRD) of flexible extended trailing antennas (FETA) on submarines and on surface ships. The invention proposes a DRD structure in which the deployment of the antenna to the stream in case some part of the antenna is wound on a winch, and its other part is arranged in a tubular storage unit, is provided by the creation of excess pressure in the tubular storage unit by means of a centrifugal pump, a sealing device on the end face of the tubular storage unit, which is close to the winch, is made in the form of a cylindrical module of the same inner diameter as the tubular storage unit, which is rigidly and tightly attached to it, and the suction pipeline of the centrifugal pump is made of two branch pipes, one of which is directed outboard and the other one is tightly attached to the inner volume of the tubular storage unit with an additional conical flange coaxial to the tubular storage unit and installed near its fore end face between the conical flange connected to the pressure pipeline and the sealing device of the fore end face of the tubular storage unit, the conical flange of the pressure pipeline is oriented with its constriction to the aft part of the tubular storage unit, and the conical flange of the suction pipeline is oriented with its constriction to the fore part.
EFFECT: increasing the safety of deployment and retrieval of flexible extended trailing antennas, some part of which is wound on a winch of deployment and retrieval devices, and some part is located in the tubular storage unit, without its damages or stops.
FIELD: measurement equipment.
SUBSTANCE: invention relates to devices for measurement of geophysical parameters in bottom area of seas and oceans. Substance: seismic module comprises a tight body (1), inside of which there is a hard disk drive (5), a unit (7) of a hydroacoustic communication channel, a ballast (2) breaker (8), a timer (9) of the breaker (8) of ballast (2), a flashing beacon (10), a joint (11) of external communication, a source of power supply (12), a hydrophysical module (13), a radio beacon (14), a seismic sensor (15), a unit (20) of spatial orientation. Besides, the unit (20) of spatial orientation comprises an electronic 3D compass, three accelerometers and three meters of angular speeds rigidly coupled with the seismic sensor (15). The seismic detector (15) is made in the form of a wideband molecular-electronic sensor. The tight body (1) is made in the form of a hemisphere with a base in the form of a plate, along the upper diameter of which there are mechanical elements of the ballast (2) breaker (8) installed. Mechanical elements of the ballast (2) breaker (8) are made in the form of slings (3), which are coupled to ballast (2) and tightly adjoin the base of the tight body (1) along its lower diameter. The hydroacoustic communication channel for connection of the seismic module with the dispatching station is made as single-relay.
EFFECT: increased validity of recorded data.
SUBSTANCE: invention relates to ship building, particularly, to surface scientific and research vessels. Scientific and research icebreaking vessel is proposed for carrying out 3D seismic technology exploration irrespectively to ice conditions which vessel has a hull where seismic equipment is located, as well as a shaft for bay cable laying. To move source of acoustic waves untethered unmanned submersible is used which bases on a vessel and is dropped and lifted via separate vertical shaft using running - pulling tool.
EFFECT: improved operational performance of scientific and research vessel for seismic exploration.
3 cl, 1 dwg
FIELD: physics; geophysics.
SUBSTANCE: invention relates to geophysics and can be used in marine seismic prospecting. Disclosed is an underwater seismic recording system for reducing noise in seismic signals caused by reflected ghost waves or movement through the water. The system comprises two motion sensors. One sensor has a first response and sensitivity to noise caused by movement of the platform, as well as to acoustic waves. The second sensor has a different structure, which insulates the sensor from acoustic waves such that the response is primarily associated with noise caused by movement. Output data of the responses of the two sensors are combined to eliminate the effect of the noise caused by movement. Upon further combination with a hydrophone signal, noise caused by reflected ghost waves is reduced.
EFFECT: high accuracy of prospecting data.
14 cl, 19 dwg
FIELD: physics; geophysics.
SUBSTANCE: invention relates to geophysics and can be used in seismic exploration. The invention discloses a seismic exploration method, as well as an apparatus and a system for carrying out said method. The method includes receiving data on particle movement and rotational speed. Data on particle speed are used to obtain a wave field characteristic and data on rotational speed are intended for displaying a wave field gradient characteristic. The apparatus includes an arrangement of seismic sensor units which are configured to take measurements associated with seismic exploration carried out on a surface. Each seismic sensor unit includes a particle movement sensor and a rotation sensor. An image of the investigated geologic environment is constructed from the found values of the wave field characteristic and wave field gradient.
EFFECT: high accuracy of exploration data.
18 cl, 13 dwg
FIELD: machine building.
SUBSTANCE: present invention relates to marine seismic researches and, in particular, to a connection system intended for connection of equipment to a marine seismometer cable assembly and disconnection of it from the latter. The proposed group of inventions comprises a connection system to attach an external device to the section of an underwater cable, a bush for rotary joint of the external device to a seismic cable, a method to connect the external device, installed on the underwater cable and fixed to a pair of cups, to a pair of bushes each of which is fitted by a belt element and a raised projection, as well as a method to disconnect the external device, installed on the underwater cable and fixed to a pair of cups each of which is made with a gap, from a pair of bushes each of which is fitted by a raised projection. The connection system comprises the first bush fixed around the underwater cable in a certain location point and fitted by a belt element and a raised projection on its outer surface, the second bush fixed around the underwater cable at a distance from the first bush and fitted by a belt element and a raised projection on its outer surface, the first C-shape cup attached to the first bush so that to be able of turning to the first bush and fitted by the inner surface intended for sliding along the belt element of the first bush, and a gap formed in the said cup by the longitudinal opening between the ends of the C-shape profile while the width of the opening between the said ends is more than the maximal circular size of the projection provided on the first bush or is equal to it, the second C-shape cup attached to the second bush so that to be able of turning to the second bush and fitted by the inner surface intended for sliding along the belt element of the second bush, and a gap formed in the said cup by the longitudinal opening between the ends of the C-shape profile while the width of the opening between the said ends is more than the maximal circular size of the projection provided on the second bush or is equal to it. The proposed bush is fitted by a belt element passing in circular direction around the bush periphery, a raised collar set on the rear end of the belt element and a raised collar set on the opposite front end of the belt element and passing along the part of the bush periphery. The proposed connection method of the external device involves connection of the pair of cups provided with gaps to the external device, turning of bushes in respect to each other to match the projections made on both bushes, pulling of the cups onto the cable in radial direction through the said gap, moving of the cups in the longitudinal direction along the cable so that the matched projections pass through the gaps to the specified position around the inner bush and turning of bushes in respect to each other to shift the projections in respect to each other. The proposed disconnection method of the external device involves turning of bushes in respect to each other to match the projections made on both bushes, moving of the cups in the longitudinal direction along the bushes so that the matched projections are in the gaps until they pass the bush and demounting of the cup fixed to the external device from the cable in radial direction.
EFFECT: at following sea, the said external devices are provided with reliable fixation and such pushing forward of the external device is prevented when the cups are disengaged from the belt elements, the above is ensured due to the fact that the projection prevents the cup from leaving the belt element when the gap is shifted circumferentially in relation to the projection.
26 cl, 7 dwg
SUBSTANCE: there is generated seismic disturbance and it is directed to ground surface; to detect response to disturbance there is used interferometre; the said response in form of transferred particles on ground surface is traced and recorded at stage of detecting; transfer of particles on ground surface is analysed during response period at analysing stage. On the interferometre an array of detectors is arranged into a line running in the same direction as a cross component Vt of rate of relative motion of ground surface particles. Also the detectors are arranged to detect light rays with different angular direction. A formed reference beam of coherent light is united with an object beam reflected from surface to obtain mutual interference in form of a speckle structure representing information on relative motion of surface and the interferometre. There is determined a detector in the array with zero or minimal response to total rate Vtot of motion, thus identifying the detector with response direction line which is arranged normally to Vtot. In this way there is established change of direction of Vtot with course of time related to change with cross component V1.
EFFECT: simplification of seismic prospecting procedure with detection of P and S- waves.
51 cl, 15 dwg
SUBSTANCE: ship is equipped with extra floating means composed of hull elements and floating elements. During transportation of unloaded ship from unloading point to loading point floating elements are arranged inside hull elements, above and along the boards. Prior to mooring, these elements are transferred behind the board outer surface. then, said floating elements extend from hull elements to increased floating means volume by magnitude equal to floating element extension volume. After loading and departure from the port with shallow fairway said floating elements extend inside said hull elements to return to initial position to be located above and along the boards.
EFFECT: mobile and reliable mooring, ship loading/unloading, transfer of cargoes in shallow water at higher shop capacity.
SUBSTANCE: proposed complex comprises sea terminal and device intended for loading tans cars on the ferry that includes railway. Aforesaid device is mounted on the said sea terminal to move relative to the latter. Note here that proposed complex comprises support structures mounted nearby moorage wall on the sea bottom and arranged to allow mounting strong linkages of the aforesaid ferry hull. Note also that crosswise sections or railways arranged on ferry cargo deck comply with those of railways mounted on aforesaid loading device arranged on the berth.
EFFECT: simplified loading/unloading, higher reliability and efficiency.
FIELD: shipbuilding; devices for removal of articles from ship's hull and securing articles to hull.
SUBSTANCE: device has beam secured on ship's hull. L-shaped beam is articulated on wall for turning around vertical axis and moving along it. Fork-type grip for holding the object is articulated at end of horizontal section of beam at vertical position of axis of rotation.
EFFECT: ease of removal and attachment of articles.