CN102788992A - Method and equipment used for collecting seismic data - Google Patents

Abstract

The invention discloses a method and equipment used for collecting seismic data and belongs to marine seismic exploration methods and systems. The equipment comprises independent seabed containers with continuous recording effect and is characterized in that the equipment has a shallow section case body and an outer buffer cushion for promoting seabed coupling and preventing a fishnet from twisting, and the individual containers are tied together through flexible, non-rigid and non-conductive cables to control the arrangement of the container. The containers are placed or taken back from the deck of a ship, and the deck is configured to have a storage system and a processing system and can allow the containers to be fixed to the cables during operation. The storage system has a grooved automatic phonograph-like configuration in which the individual containers are randomly stored in the grooves; and the data extraction, charging, test and synchronous operations can be performed under the condition that the containers are not opened. Each container can comprise an inertial navigation system to determine the seabed position and a rubidium clock for timing purpose. The system comprises a mathematical gimbal. The cables can comprise shear coupling and are designed to automatically cut off when the cable tension reaches a certain level.

Description

The method and apparatus that is used for earthquake data acquisition

The application is to be that September 21, application number in 2004 are 200480044393.0, denomination of invention is divided an application for " method and apparatus that is used for earthquake data acquisition " a case the applying date.

Technical field

The present invention relates to the seismic prospecting field.Specifically, the present invention relates to the method and apparatus of seismic prospecting, more particularly, the present invention relates to utilize the oceanic earthquake of seabed sseismograph system to detect.

Background technology

Seismic prospecting general using seismic energy source is to produce a voice signal, and this signal is propagated entering soil and partly reflected by the seismic reflectors under the face of land (that is, the interface under the face of land between lithology layer or the fluid layer is characterized in that different elasticity is arranged).Be positioned at earth surface or near the signal (being referred to as " seismic reflection ") that seismicrophone detects and record is reflected, thereby produce the seismic prospecting under the face of land.Then, can handle the signal or the seismic energy data that are write down, can produce the information that the relevant lithology face of land forms thing, thereby discern these characteristics, for example, the lithology face of land forms the border of thing.

Be typically, seismicrophone is laid an array, and wherein the seismicrophone array is to be made up of the single string receiver that distributes along delegation, in order that write down the seismic section below this line receiver.For data on large tracts of land and the three dimensional representation that forms thing, many string receivers must be set abreast, therefore, form a receiver grid.Usually, the receiver in array be mutually away from.For example, in the seismic prospecting of land, can dispose hundreds of to several thousand receivers that are referred to as seismoreceiver according to the mode of different spaces; For example, typical grid configuration, wherein every string receiver extends 1600 meters; Every have a detecting device at a distance from 50 meters, is spaced apart 500 meters between each is gone here and there in succession.In detect the ocean, the pull-type floating drum of receiver is arranged, they are referred to as nautical receiving set, are connected tow vessel and can reach 12000 meters afterwards.

Generally speaking, several receivers connect into the parallel-to-serial combination, on single twisted-pair cable, form single receiver group or pipeline.In data-gathering process, be digitized and record from the output of each pipeline, be used for analysis subsequently.These receiver groups are typically connected to cable, be used for receiver communicate by letter and data that transmission is collected to the registering instrument that is in the center.More particularly, when carrying out this detecting in the land, the Wireline telemetry technology of data transmission is used for the detector cell through cable bond.Other system utilizes the wireless method of data transmission, and therefore, each detector cell is not interconnected.Before data were extracted, other some systems temporarily stored these data.

Though detect and the basic process of record seismic reflection land with under marine environment, be identical; But marine environment has some unique problems; This is because of covering a large amount of water to be arranged on the earth surface, is the corrosion environment that high pressure deep water is movable and salt solution is movable the most significantly.In addition, also be complicated even simply dispose and fetch, because various operation must be carried out under the deck of seismic prospecting boats and ships, wherein such as wave, the foeign element of the weather and the finite space etc. can influence this operation greatly.

In a common oceanic earthquake method for surveying, seismic operations is on the surface of water body, to carry out.Imbed in the marine ship towing floating drum and be used to detect nautical receiving set through the reflected energy of water column.Floating drum is normally by the nautical receiving set string, other electric conductor and be used to provide the material of approximate neutral buoyancy to constitute.The floating drum of processing swims on the water surface.Identical or other similar marine ships pull sonic energy sources, for example, air cannon, emission energy pulse, the face of land lithology that transmission downwards enters under water forms thing.

The system that is placed on the seabed also is used for many years.This device is referred to as " OBC " (subsea cable) or " OBS " (submarine earthquake meter) system usually.Prior art uses the undersea device of three groups of main types to measure the seismic signal on the seabed.First type of equipment is the OBC system, is similar to the pull-type floating drum, and it is to be made up of the cable that comprises seismoreceiver and/or nautical receiving set, and is laid on the seabed, and wherein detector cell is to interconnect with cable telemetry.Usually, the earthquake boats and ships are disposed cable and are left fore or stern, and fetch the cable of boats and ships end opposite.The shortcoming that this OBC system can have the cable actual disposition to produce.For example, when disposing the 3-D seismics wave detector, because sedimentary coupling is not firm on cable and seismoreceiver and the seabed, the tangential movement outside the sediment, for example, flow in the seabed, the signal that can make the mistake.Under this identical situation, because its elongation type structure, when attempting to write down the shearing wave data, the OBC system is only along satisfied coupling is arranged on the main shaft of cable.In addition, need to use three ships to carry out this operation, except the seismic energy source boats and ships, also be useful on the required special equipment boats and ships of cable portion administration and be used to write down required independent boats and ships.The record boats and ships normally stably are fixed to cable, normally dispose and fetch cable and do constant motion with the receiver line and dispose boats and ships.Because record boats and ships and cable have constant actual contact; Need to make great efforts to keep vessel's position; Fluctuation is done and the strength of ocean current can produce very big tension force in cable, thereby increases fracture cable or equipment failure, and introduces the possibility of undesired signal to cable.At last, this cable system has very high capital investment and expensive operation cost.

Second type of register system is the OBS system, and wherein sensor device and electronic installation are cast anchor on the seabed.This device makes signal digitalized and utilizes cable transmission data to radio unit usually, and this radio unit is fixed to the cable that casts anchor and floats on the water surface.The transmitter unit that floats transmit data on the above water craft of record geological data.In seismic prospecting, dispose a plurality of transmitter units usually.

The third type seismologic record device is the OBS system that is referred to as submarine earthquake registering instrument (SSR).These devices comprise the sensor device and the electronic installation of sealing, and the signal on the record seabed.The retrieval of data is through fetch this device from the seabed.The normally reusable device of this device.Emphasis of the present invention is a SSR type OBS system.

SSR type OBS system generally comprises one or more seismoreceivers and/or water is listened sensor, power source, seismic data recorder; The crystal oscillator clock; Control circuit, and shear under the data cases with record at the seismoreceiver that utilization has a gimbal, also comprise compass or gimbal.Except the common electric battery of power source is provided the power from the outside through cable.When prior art OBS system utilized on-board batteries rather than external cable that power is provided, the prior art battery was a lead-acid battery, alkali property battery or rechargeable battery not.The common requirement of OBS system of all prior aries can be opened various unit so that carry out various maintenances, quality control and data extract activity.For example, from the prior art unit, extract data demand, can open or dismantle each unit so that extract data.Likewise, must open this unit so that the replacement old and useless battery.

About the timing function of OBS system, between the triggering of the timing of sensing data and seismic energy source is important synchronously, in order that make seismic origin incident and reflection event coupling.In the past, use various crystal oscillator clocks to realize this function in the OBS system always.The crystal oscillator clock is relatively cheap and accurate.Yet a shortcoming of this prior art clock is that clock crystal receives gravity and Influence of Temperature.This gravity and Influence of Temperature can make oscillator frequency generation frequency displacement, thereby cause the error of geological data.In addition, because crystal receives the influence of gravity, the orientation of OBS system can influence the operation of clock.Because clock normally is fixed in the OBS device, on the seabed, correct orientation arranged during proper orientation in order to make the OBS system, any misorientation of OBS system on the seabed can cause the inaccuracy of clock.At last, this clock often has the drift and the characteristic of time shift, and this causes owing to temperature variation and timeliness, and it can cause being write down the inaccuracy of geological data equally.Though can carry out the mathematics correction to the aging data that obtain with time shift of temperature, one type of prior art syringe can not be revised the influence of gravity to crystal clock.At the most, prior art only can be revised the influence of temperature to crystal clock.

Modern OBS system can also comprise the mechanical hook-up that is used for correct tilt, that is, and and gimbal.Gimbal is a kind of like this device, and it allows to do angular motion freely along one or more directions, and can be used for confirming the orientation of OBS system on the seabed.The orientation data that gimbal produces can be used for adjusting the geological data of seismoreceiver record.Utilize in prior art under the situation of gimbal, they as a part in the seismoreceiver, are referred to as " normal level land shake wave detector " often.A shortcoming of these prior art machinery gimbals is limited angle orientations that this device allows.For example, at least a prior-art devices allows gimbal that 360 ° rotation is arranged, but the angle of pitch of gimbal only is confined to 30 °.In this device, correctly move in order to make this prior art gimbal, OBS system itself must be parked in the basic ideal position on the seabed.In order to make the OBS system is not the along continuous straight runs orientation at least basically, for example, faces upward or downward, and the mechanical gimbal of prior art just can not normally be worked.Other gimbal devices of engineering properties are not limited to 30 °, yet in this mechanical gimbal device, the mechanical damping in this device can be destroyed by the fidelity of tracer signal.At last, the gimbal device of seismoreceiver is expensive, and requires more space than the seismoreceiver that does not have gimbal.In utilizing the OBS system of a plurality of seismoreceivers, because its size and space requirement, it is unpractical to seismoreceiver gimbal being installed.

About orientation, the location of OBS system on the seabed is essential for the geological data of correctly explaining this system log (SYSLOG).The accuracy that is processed data partly depends on the accuracy of handling the used locating information of these data.Because conventional locating device, for example, GPS can not work under water environment, and traditional art methods of on the seabed, setting up OBS system location comprises sonar.For example, in sonar system, the OBS device can utilize pulse signal to confirm its position.Under any situation, the accuracy that is processed data directly depends on the setting accuracy of confirming the OBS system.Therefore, it is desirable to, we need utilize such method and apparatus, and it produces reliable positioning information.Likewise, we also need guarantee to realize the expection location of OBS device on the seabed.

About the operation of above-mentioned OBS system, prior art systems requires some outside control commands that produce usually, in order that starting and obtain each data of taking.Therefore, the seismicrophone unit must be physically connected to central controlling recording station and maybe can carry out " connection " through wireless technology.As stated, the professional can understand that some environment can cause very big challenge to the conventional method of connection and control detection device, for example, and crowded or dark sea area, rugged alpine region and jungle.All difficulties can also occur in some cases, wherein need termly the mobile receiver array to cover bigger zone.

No matter be to utilize actual cable or through wireless technology, every type be connected with it self shortcoming.In cable telemetry system, big array or long floating drum cause a large amount of cable layings, and this is expensive, and intractable, disposes or operates.Under the situation of using bottom cable laying, in surpassing 500 feet deep water, the environment of corrosion and high pressure often need expensive cable protection overcoat.In addition, conventional cable laying also need have actual being connected between cable and sensor unit.It is unpractical often on cable, to utilize rigid line to connect sensor, and more common technology is to utilize cable to be connected with outside between the sensor cable is connected with sensor.Be fragile especially this being connected between cable and sensor, particularly under the marine environment of corrosion and high pressure.Certainly, utilize the system that links together through cable, to sensor power is provided, making the synchronous and control sensor between sensor and shooting time and the sensor is very to be easy to.

Should be noted that no matter be cable or wireless system wherein need lay external cable with the sensor device of connection device and record and/or the telemetering gear in this unit, there are many above-mentioned shortcomings in it.Specifically, the OBS system of prior art comprises and is installed in detection and the record/radio telemetry cell arrangement that separates on the carrier.There is the aerial lug that links together through cable unit separately, and they have the identical problem of controlling with central authorities on the water surface of cable.Each detecting unit, that is, seismoreceiver, with the main cause of separating between the remaining circuit part be to guarantee that seismoreceiver is coupled to the seabed effectively.

In the operation that utilizes wireless technology or sensor is under the situation through pre-programmed, and it is difficult more that the control of sensor becomes.For example, guarantee that recording operation is crucial with taking regularly synchronously, because each sensor does not link together through lead.Therefore, need above-mentioned airborne accurately clock.At this on the one hand, must be synchronous in each unit that suitable time excitation is used to detect and write down with shooting.Guarantee that it also is the problem that we were concerned about that there is enough power each unit.Various technology of many prior art patent concentrated discussions and mechanism, be used for during data aggregation and record to sensor power supply and between rest period the power supply of closure sensor.

People have proposed various measures to overcome above-mentioned shortcoming.For example, at US Patent No.5, a kind of submarine earthquake registering instrument is described in 189,642.This patent discloses a long setting frame, and it is that horizontal annular plate by spaced connects and composes through vertical support frame spare.Each frame member is to be made up of slidably nested pipe mutually, and utilizes clamp mechanism fastened to each other.Gimbal is detachably fixed to down dull and stereotyped.The seismoreceiver device also is fixed to down dull and stereotyped.The foam buoy is fixed to upper flat plate.Control device from upper flat plate to extending below.Installation power source in the control device, seismic data recorder device, compass and control circuit.Outside hardware circuitry connects control device and seismoreceiver.This system does not utilize any rigid line communication link to the monitoring station, sea, but utilizes sound or pre-programmed means to control this unit.In the time of in being discharged into water, suppose that gimbal can provide enough quality, be used to keep this system's setting and after sinking, be coupled seismoreceiver to the seabed.Arrive the possibility of buoy and control device for the seismoreceiver noise contributions that reduces ripple or water movement generation; In case this system, coupled is to the seabed; Discharge the clamp mechanism of each support; Thereby allow control device upwards to slide into nested support, other parts of seismoreceiver and this system are isolated with buoy.In case the completion seismologic record discharges gimbal from frame, and this system can rise to the water surface under the positive buoyancy effect of evener.Acoustic transformer, radiobeacon and flashlamp can be used for the location and fetch this system.

At US Patent No.6, another kind of marine seismic data register system is described in 024,344.This patent is described a kind of method of in deep water, disposing and locating seismic data recorder.On above water craft, datalogger is fixed to the semi-rigid lead that is deployed in the water.Because the rigidity of lead, its function are definite fixed distance between registering instrument and the lead that sinks to the seabed.This lead can also be given between the adjacent registering instrument and the power and signal that telecommunication is provided between registering instrument and the boats and ships.In case registering instrument is placed in place, they are passed through water or pass through the excitation of lead control signals transmitted by preset clock or utilization.After accomplishing data aggregation, fetch lead and registering instrument.Deployment is to utilize the cable machine that is placed on the above water craft to accomplish.Shown in Figure 1 as in ' 344 patents, when boats and ships are when moving along the direction of leaving lead and registering instrument, deployment operation occurs in the stern of boats and ships.This patent also describe need be in order mode put appearance, in order that be convenient to during data aggregation, dispose and follow the tracks of the sub sea location of OBS system.

GeoPro provides a kind of independent O BS system,, does not have the OBS system of cable that is; It is that glass bead by the 430mm diameter constitutes, and wherein comprises all circuit components of this system, comprising: battery; Radiobeacon, seismic data recording unit, sound delivery system; Deep-sea nautical receiving set and three seismoreceivers that gimbal is installed.Glass bead is installed on the guide rail that increases the weight of, and it can suppress the buoyancy of glass bead and the OBS system is cast anchor to the seabed.Seismoreceiver is placed on the glass bead bottom contiguous with guide rail.In order after accomplishing data aggregation, to recover the OBS system, emission sound command signal detects to glass bead and by the deep-sea nautical receiving set.This signal excitation sound delivery system, it can make glass bead and remain on separating increasing the weight of guide rail of seabed.Under the positive buoyancy effect of glass bead, the unmanaged flexibility system rises to the sea, and wherein the radiobeacon emission is used to locate and fetch the signal of glass bead.A shortcoming of this concrete design is that seismoreceiver is not directly coupled to the seabed.On the contrary, must be transmitted the bottom through guide rail and glass bead by any seismic signal of seismoreceiver record, in this case, this seismic signal stands above-mentioned noise and other distortion.Should be noted that this composite design represents many cylinders and the spheroid form that utilizes in the prior art, because well-known, contingent high pressure is more effective to this shape under marine environment for standing.

K.U.M. with SEND a kind of OBS system that does not have cable is provided, it is included in the bar at top and forms the framework of tripod in the bottom.The foam buoyant device is fixed to this bar.An anchor arrives the seabed to the bottom of tripod and frame fixation.The pressure cylinder that is installed on the tripod part of framework comprises seismograph, battery and delivery system.Nautical receiving set is fixed on the framework, in order that receive command signal from the sea and encourage delivery system.The gib arm of crane of pivotable also is fixed on the framework, and the gib arm of crane is fixed to the seismoreceiver unit releasedly.When disposing, the gib arm of crane remains on vertical position at first, and the seismoreceiver unit is fixed to the free end of the gib arm of crane.When framework touched the seabed, the gib arm of crane stretched out from framework, and discharged the seismoreceiver unit on the about 1 meter seabed of frame system.Rigid line allows between seismoreceiver unit and registering instrument, to realize telecommunication.The seismoreceiver unit itself is the asymmetric disk that diameter is about 250mm, and its side is smooth, and another side is a dome shape.On the tabular surface of seismoreceiver unit groove is arranged, and when being discharged, touch the seabed by the gib arm of crane.After accomplishing data aggregation, an acoustical signal excitation delivery system, it can make anchor separate with frame system.The foam buoyant device can make frame system and seismoreceiver rise to the sea, wherein utilizes the radiobeacon location and fetches this system.

SeaBed Geophysical sells the no cable OBS system of called after CASE.This system comprises: control module, that is, and electronic installation and by interconnected node unit of cable or seismoreceiver.Control module and node unit are installed on the long framework.Control module is a tubular body, and it comprises battery, clock, and record cell and transponder/modem can carry out underwater sound communication with the water surface.Node unit comprises: seismoreceiver, nautical receiving set, inclinator and interchangeable sleeve, its middle sleeve form cylindrical under shed below nautical receiving set.Node unit is separable with long framework and control module, but communicating by letter through external cable maintenance and control module.The use of this tubular body can be represented the design of prior art, because the shell of system must be designed to stand the high pressure that this device bears.During disposing, whole unit drops to the seabed, and wherein remote-operated vehicle (separating with the OBS system) is used to make node unit and framework to break away from, and makes node unit put into the seabed, thereby the sleeve that promotes opening gets into marine bottom sediment.Long framework comprises one can fix the ring of disposing and fetching cable.Utilize communication scaling device and modem this system of control and launch geological data to the water surface.

The prior-art devices of each reference all has one or more shortcoming of the prior art.For example, US Patent No.5,189,642 OBS system and the device of GeoPro and K.U.M./SEND are upright systems, there is high relatively vertical profile in each system.Therefore, stood to affact this device by the geological data of these systematic collections and go up the noise that the water transport movable property is given birth to.In addition, we observe, and the shearing motion that the seabed motion produces under this maximum section of passenger flow OBS system can cause the rock motion of OBS system, particularly from the bottom of unit to the translation motion at top, thereby further reduce by the fidelity of record data.In addition, these prior-art devices all are asymmetric, and therefore, only can there be single orientation their position.Usually, this is to realize through an end that increases the weight of the OBS carrier especially.Yet this device possibly must and touch rugged often seabed through hundreds of foot seawater, possibly scatter various fragments on this seabed.All of these factors taken together can cause system that incorrect orientation is arranged when putting into the seabed, thereby influences the operation of this system.For example, be under the situation of laying in this prior art OBS system by its side, seismoreceiver with the seabed coupling, thereby this device can not be used.In addition, the releasing mechanism that incorrect orientation maybe EVAC, thus destroy the recovery of this system.

The maximum section of passenger flow of these prior art systems also is unfavorable, because this unit is easy to be wound onto the fishing line, and the shrimping net, on all kinds cable or other the fragment, they maybe be just in the movable adjacent domain of seismologic record.

On the other hand, have the prior art systems than light section, for example, subsea cable often has weak coupling ability or when placing, need utilize expensive equipment as servicing unit, for example, and ROV.The elongate shape of subsea cable can cause only on single orientation, having " good " coupling, that is, and and along the orientation of cable primary axis.In addition, even along its main shaft, but since between cable and the seabed real contact area very little, coupling suffers damage because of near other barriers rugged seabed or the seabed.

Another shortcoming of these prior art systems is to need excitation and de-energisation to be used to the unit that writes down and move.This needs the control signal from water surface ship usually, generally is through the sound transmission or the cable through extending to this unit from the water surface.The external control of any kind is unfavorable, because it requires signal transmission and additional element in system.Though the sound transmission can be used for the transmission of some data, it is normally insecure to realizing synchronous purpose, because exist unknown transmission path to change.Certainly, any kind control signal that is used for transmission of electric signals is unfavorable, because it increases the complicacy of cell processing and control and needs outside connector or coupling.Under high pressure and corrosion environment that bathyseism is detected, this cable and connector are sensitive especially for leakage and fault.

Similar problem also appears in more such unit, and they utilize the distributed component of this unit of external cable connection, for example; At US Patent No.5; In 189, the 642 disclosed or similar devices, wherein the seismoreceiver device separates with circuit arrangement.In addition, be under the distributed situation at the electronic component of system, the likelihood of failure of system just increases.

Many prior art systems are also utilized radiotelemetry, rather than utilize the onboard units record data to collect data.Certainly, the restriction that this system has wireless Charge Transport Properties to force, for example, and the constraint of radio-frequency spectrum special permission, distance limit, sight line is blocked, the antenna restriction, the data rate restriction, power constraint, or the like.

Those OBS unit that utilize buoyant device to fetch are unfavorable, because typical isolator makes this unit increase extra-pay and complicacy, must encourage usually to discharge this system to the water surface.In addition, this system abandons the unit of part usually, that is, anchor that increases the weight of or guide rail, thus make it become the fragment on the seabed.During disposing, because they are unmanaged flexibilitys, this system is difficult to be positioned at the ideal position on the seabed.The orientation of mistake though above-mentioned fault is, when fetching, although have radio signal and beacon, the system of unmanaged flexibility is difficult to the location and at sea loses.Likewise, under the situation of high seas, these unit are to be difficult to control, will bump with offshore beacon or ship usually, bring potential danger to system.

Under this identical situation, the control to each unit when disposing and fetching is very difficult.Under the situation of utilizing rigidity or semi-rigid cable system with fixed range and each record cell of location, this cable is not soft, the very big and very difficult operation of weight.This cable does not allow when disposing, to proofread and correct.For example, as stated, desirable grid layout can be discerned along the particular location of each unit of straight line.Leave on the position of expection straight line, then must reorientate the ship on the water surface if the layout ship drifts about or cable is laid on, it is turned back on that straight line.Yet because the rigidity of cable, the location of mistake part of cable can make the every other unit on this cable depart from the straight line of expection.

The current step of in addition, fetching the cable utilization in the prior art makes cable receive unsuitable stress easily.Specifically, the extensive acceptable method of fetching cable from the seabed is to turn back on the straight line, or drives ship to the straight line of fetching cable at the boat.This method is unfavorable, because must carefully adjust the speed of ship and the speed of cable capstan winch, does not have excessive tension force or pulling force on the cable in order to make.This adjustment often the difficulty because various external factor affacts on the ship, for example, wind, wave and current.Tension force or the pulling force that can not control cable can influence drag draw whole length cables line and with its fixing unit, thereby damage whole cable and all unit.Another shortcoming of this method is that if the ship motion is too fast, it can cause cable slack, and makes cable floating under ship, can be wound onto in the thruster of ship.

At last, a kind of afterdeck system that is used to handle above-mentioned OBS unit is not described all in the prior art, no matter it is the deployment of depositing of unit or unit and fetches.Along with the size of deep water seismograph array becomes increasing, need a kind ofly comprise that this array is used for effectively depositing that follow the tracks of, the system that serves and handle several thousand recorder units becomes more important.The above water craft that adds is expensive, and the personnel that need operating ship.Personnel and the also increase accident of boats and ships and the injured possibility of adding are particularly under the high sea environment that weather can worsen rapidly.

Therefore, it is desirable to provide a kind of seismic data acquisition system that does not need PERCOM peripheral communication/feed cable, perhaps from the water surface or in the seismic data acquisition unit itself, rather than the external control signal of operation any kind.In other words, this unit should move on the basis of " drop and forget ".Likewise, this device should be easily to operate, and does not need device for opening to accomplish such as data extract the activity that quality control and power replenish.This device also should be designed to be able to bear ubiquitous corrosion and high-pressure environment in the deep water marine application.This unit should be configured to reduce the noise of ocean current as far as possible and increase the coupling between this device and the seabed as far as possible.Under this identical situation, this device should be designed to correct orientation, can make this device in contact maximum coupling arranged during the seabed, and need be such as the external unit of ROV auxiliary, and reduce the possibility of incorrect orientation.Likewise, this device should be not easy by the shrimping net, and the fishing line twines.

This device should comprise being orientated insensitive timing mechanism.Similarly, orientation should not influence the normal flat operation of seismoreceiver.

This device should be disposed easily, but also can be placed on certain position of high confidence level.Likewise, this device is easily fetched, and it does not need floating installation or releasing mechanism, and the parts of this unit should not be retained in the ocean when fetching.In addition, such device should be arranged and fetch process, it can reduce the tension force of potential damage when connecting the cable of seismic unit.

The system of a kind of easy processing hundreds of or several thousand recorder units also should be provided, and this unit comprises an array that is deployed under the marine environment.This system should dispose, and fetches, and follows the tracks of, and keeps and deposits each recorder unit, meanwhile, can reduce the needs of manpower and additional above water craft.This system should reduce the potential damage to various unit as far as possible between this active stage.Likewise, need comprise various safety features in this system, it can reduce the injury to the personnel of operation recorder unit.

Summary of the invention

The present invention provides a kind of system that is used to collect geological data under the marine environment; Wherein through disposing the wireless of a plurality of continuous workings; Independently submarine sensor unit or container, the characteristic of each container is symmetrical, shallow section casing; With the external buffer pad of uniqueness, seabed coupling can be provided and prevent to be twined by fishing net.Utilize soft non-rigid, non-conductive cable, can be fastened to each other between each container, cable is used to control the underwater deployment of container.This container is disposed and is fetched from the deck of the distinct configuration of marine ship, and conveyer belt system and disposal system are arranged on its middle deck, and each container can be fixed with non-rigid cable and separate.In one embodiment, as the deck configuration of part, each container is left on the fluting frame with the jukebox mode randomly.In the time of in leaving the fluting frame in, can retrieve the geological data of the former record of this container, and can be to this condenser charge, test and synchronous again, and, can restart its operation not opening under the condition of container.During disposing and fetching, can handle non-rigid cable and be fixed to the container on the cable, by means of the motion of above water craft, form the possibility of tension force in the cable that can reduce to be disposed.This comprises the non-rigid cable system of distinct configuration, can automatically shear when it is designed in cable, reach certain tension level separately.

More particularly; Each independent sensor unit comprises discoid waterproof casing; This casing is to be made up of two parallel circular flat boards, is to link together with shallow sidewall at their edge, thereby forms an axisymmetric encapsulation around plectane; With the diameter with respect to plectane very shallow section is arranged, its shape is the spitting image of a wheel.This casing is supported internally, the integrality of protection casing under the pressure externally, and solid mechanical couplings is provided between unit box and seismoreceiver.In one embodiment of the invention, there is such configuration this unit, and it can be coupled and collect geological data effectively with the seabed, no matter which position the plectane side is in, thereby gets rid of many orientation problems of the prior art.This plectane can comprise ridge, and boss, or groove are in order that the coupling in enhancing and seabed.

In one embodiment, a cushion pad is set around this shallow wall in unit, it is to be parked on the plectane side of this packing that the Cross section Design of cushion pad becomes to force this unit, thereby causes forming between this unit and the seabed coupling closely.In at least one embodiment, the cushion pad that provides is designed to prevent that this unit from being twined by shrimping net or fishing line.

The several different devices that are used to be connected to cable of this unit by using.In one embodiment, each unit comprises the blocking mechanism of an off-centre, allows this unit to be fixed on the cable.In another embodiment, geometrical clamp is on the off-centered position of casing side.In another embodiment, geometrical clamp is on the center of a plectane in the unit that forms casing.

This unit is independently, and therefore, all electronic components are arranged in the casing, and it comprises: multidirectional seismoreceiver device, seismic data recording devices, power source and clock.

In one embodiment of the invention, clock is a rubidium clock.Rubidium clock is very insensitive for temperature or gravitational effect or this unit orientation on the seabed.

In another embodiment, this unit comprises crystal clock and inclinator.Preferably, onboard units utilizes inclinator that the gravitational effect of crystal clock is proofreaied and correct in real time.

The rechargeable battery that power source is preferably worked under sealed environment, for example, lithium ion battery.

The unit further that comprises inclinator utilizes tilt meter data to proofread and correct various functions in addition to accomplish crystal clock.For example, a characteristic use tilt meter data of the present invention is carried out the mathematics balance.Specifically, in the present invention, utilize tilt meter data, accomplish the balance of seismoreceiver from mathematics, therefore, it has nothing to do with the orientation of unit, as mechanical gimbal.

Certainly, tilt meter data can be used for also confirming the position of a unit on the seabed that this is often to utilize this data in the prior art.Yet different with prior-art devices, a characteristic of the present invention is to obtain and utilize tilt meter data according to continuous mode of time.In case when seismologic record began, the position of unit was mostly just confirmed in the prior art unit.But we observe, and the position of unit possibly change in deployment, because this unit receives such as current, and the influence of external force such as shrimp line.Therefore, in the present invention, the tilt meter data of measurement is as the function of time.This at run duration through repeatedly accomplishing, so, correct seismic data as required.

About inclination, the correction of timing or type likelihood data, these data can influence the accuracy of the geological data that is collected, and all prior-art devices are to carry out this correction in processing enter.Not having a kind of prior-art devices is when disposing or on the deployment boats and ships, to utilize onboard units to do this correction.Therefore, a method of the present invention is when disposing, to utilize onboard units to do this correction.

This unit further comprises: compass, nautical receiving set, sound position transducers, and/or one or more accelerometer.Compass data provides the reference frame data with respect to reference system can for each unit, is used for totally detecting.In one embodiment of the invention, the sensor such as accelerometer is used for the position of tracking cell when descending through water column and resting on the seabed.Specifically, this sensor provides inertial navigation data and when water column is passed through in this unit transmission, writes down x, the information of y and z position.This positional information and initial position and velocity information are used for confirming the final position of this unit.

In another characteristic of the present invention, this unit is to be energized on the earthquake boats and ships time, and in case when pull out the ocean, be de-energized, therefore, it is before deployment time, after the time of fetching, to obtain data continuously.Likewise, in one embodiment, this unit be in being deployed to water before the opening entry data.Be energized and in being deployed in water before the system of opening entry be by stable in the times prior that needs input.This can reduce the variable condition interferer signal detection of electronic component operation and the possibility of record.

In another characteristic of the present invention, seismic data recording devices comprises the takeup type storer, even not in use, and also record continuously.This can be avoided starting or the needs of sign on, thereby guarantees that this unit is stable in required writing time, and as the reserve data of record in the past, until before data be capped till.As long as clock is synchronous, this pen recorder is all prepared for deployment at any time.In addition, such as data aggregation, the routine operation of quality control test and battery charge can be carried out under the condition of interruption logging not.Under the situation of this continuous recording unit, this unit can be used under land or the marine environment.

The use of non-rigid cable is another characteristic of the present invention.Though in prior art very early, used the dragrope of rope as the unsteady earthquake-predictive device of the water surface, before this, under the interconnected situation of OBS system, prior art is only utilized rigidity or semi-rigid wire rope.It is to need this system of circuit interconnection that prior art OBS system uses a reason of steel wire cable.Yet, in the present invention, use non-rigid cable to be because above-mentioned container is worked independently, it need or not be connected with the communication of outside.Non-rigid cable of the present invention is preferably processed by composite fibre materials, for example, and polyester, and utilize the encapsulation of protectiveness pressing mold covering, for example, the polycarbamate casing.In one embodiment, non-rigid cable is that polyester core by 12 bursts of braidings constitutes.Rib or groove are arranged to reduce the resistance in water on the pressing mold.

Non-rigid cable of the present invention also is useful in unique dispositions method of container.Specifically, non-rigid cable only has slight negative buoyancy force.When cable is fixed between two containers; Each container negative buoyancy force far away is much larger than the negative buoyancy force of cable; When the container of two connections sank through water column, the pulling force on the non-rigid cable was far longer than the pulling force that acts on the unit, therefore; It can be used as drag parachute or detent, thereby the decline of container is slowed down and makes container remain on vertical position.This is desirable especially for the unit that must be placed on specific orientation; For example, those containers of asymmetric cushion pad configuration are arranged, because when cable is fixed to the connector that install at the center on the top board; Be passed down through water column and rest in the process of seabed at it, its function is the orientation of holding unit.In addition, because cable of the present invention is non-rigid, the cable between the adjacent container relaxes.The deck officer can utilize this lax cable, when deployment container, proofreaies and correct the position that descends.

Likewise, non-rigid cable can strengthen unique retrieval methods of the present invention, wherein when boats and ships be when driving along cable, cable is fetched at the afterbody of boats and ships.So, the pulling force that water produces on cable can make cable decelerate to after the boats and ships, thereby reduces the hightension of crossing to cable, and guarantees that cable unlikely is wound onto in the thruster of boats and ships.

In one embodiment of the invention, on the deck of earthquake boats and ships, storage system comprises a storage rack that multirow and multiple row groove are arranged, and this storage rack is arranged to place each unit.Each groove comprises COM1, and therefore, in the time of in the unit is placed on groove, this unit is got in touch through COM1 and main control station.Through this port, can be loaded in information recorded on this unit down, element cell can be recharged, and can on this unit, carry out quality control checking, can restart recording operation, and this unit can be by excitation again.In another embodiment of the present invention, storage system comprises overlapping U-shaped carousel.Each travelling belt comprises roller, allows record cell to move according to the travelling belt mode along the path of carousel, arrives the vicinity of COM1 until this unit.No matter utilize which kind of storage system, storage system can be configured to the Container Dimensions of 8 ' of standard * 20 ' * 8 ', therefore, can easily utilize storage system and any seismic unit of the container ship transport and load of standard.

Each unit can comprise unique recognition device, and for example, RF identification (RFID) mark or similar identification marking when these unit are when being processed above deck the time, can be followed the tracks of them.Likewise, as stated, each unit comprises position transducers or accelerometer, is used for confirming the position of unit on the seabed.Because each unit is independently, it is to be inserted into randomly on the storage rack that the positional information relevant with identification marking allows these unit, but according to this unit on the seabed with the front position, allow to retrieve and the data of a plurality of unit of series arrangement.Therefore, it is tactic need not keeping these unit.Each unit depositing on storage rack adjacent on the receiver line needs not to be adjacent.

In addition, above deck general plan with fetch each unit and carry out automatically basically.Deck configuration comprises adjacent with storage rack and extends to the conveyer belt system of the gunwale adjacent with the water surface.Robotic arm is used between storage rack and travelling belt, moving each unit.In one embodiment, the cable machine of placement and reeler/case are in order to decontrol non-rigid cable, in order to make it and conveyer belt system is adjacent and in the side of boats and ships.When each unit is placed on the conveyer belt system that is fixed to non-rigid cable, allow fixing each unit when operation.In addition, the professional can understand that the relieving speed of cable is not constant, because the motion of boats and ships through the water surface is not constant, even on right up and down sea.Therefore; For fear of too big tension force in cable, occurring, it can cause the destruction of cable and the entrainment of unit, and in order to make the unit be parked on the seabed exactly; Adjustment is constantly decontroled cable and is got into the speed in the water, is used to compensate boats and ships mistake and uncertain motion on the water.Therefore, must adjust the line speed that loading is fixed to each unit on the cable continuously.

In another embodiment of the present invention, travelling belt is to intersect with the cable of being decontroled by the cable machine.In joining, seismic unit is fixed to cable, and the unit that is fixed is released in the water subsequently.Cable clip in the fixed station downstream is to catch cable in the unit securely before fixing, thereby removes the tension force of upper reaches cable when being fixed to cable in this unit.Cable clip can comprise delivery system, and it requires the operator to make and with the hands opens cable clip, thereby reduces the danger of this operator when releasing unit, and to make upper reaches cable be once more under tension force.

About the tension force in the cable, cable is by segmentation, and utilizes the disconnect connector of unique design that each cable section is connected mutually.This connector comprises first assembly parts nested against one another and second assembly parts.Each assembly parts is fixed to an end of cable section, and therefore, fastened to each other together the time when each assembly parts, a plurality of cable section form one section long cable.If the tension force in the cable is greater than the shearing restriction of shear pin, then shear pin just breaks off, and makes cable separately.

In addition, though one embodiment of the present of invention are utilized clamp mechanism, it allows each unit directly to be clamped on one section cable, and an alternative embodiment of the invention is utilized the sleeve of fixing cable.The clamp mechanism sleeve that shoulder limits that can fixedly be molded.Fixedly shoulder between adjacent one section cable is general in the prior art, but sleeve of the present invention can be clamped or be placed on around one section cable and be fixing, and need not cut cable.In this embodiment, it is to pass through sleeve and cable by means of inserting pin that sleeve is fixed on the cable, and it is on x and y plane perpendicular to cable axle.Shoulder is to be embossed on the pin at the two ends of each sleeve.Though the mold pressing on the opposite end of sleeve can be used for limiting the fixed area along sleeve, sleeve can comprise hydraucone, can further limit this fixed area.

Description of drawings

Fig. 1 is the sectional view of seismologic record of the present invention unit.

Fig. 2 is the front view of unit shown in Figure 1.

Fig. 3 is the rear view of unit shown in Figure 1.

Fig. 4 is the top view of unit shown in Figure 1.

Fig. 5 is the rear view that the unit of circular cushion pad section is arranged.

Fig. 6 is the rear view that the unit of wedge shape cushion pad section is arranged.

Fig. 7 is the top view that the unit of wedge shape cushion pad shown in Figure 6 is arranged.

Fig. 8 is the elevation view that the radial type unit is arranged.

Fig. 9 is the section end view of non-rigid cable.

Figure 10 is the cross sectional side view of shear pin connector.

Figure 11 is the elevation view of shear pin connector shown in Figure 10.

Figure 12 is the cross sectional side view of container fixing cable sleeve.

Figure 13 is the elevation view of fixed muffle shown in Figure 12.

Figure 14 is the side view that boats and ships were disposed and fetched to seismic system.

Figure 15 is the container sewerage of the automatic speeds match of explanation and the afterdeck layout of container storage system.

Figure 16 is the side view of jukebox mode storage rack.

Figure 17 is the end-view of deck shown in Figure 15 layout.

Figure 18 is the elevation view of deck shown in Figure 15 layout.

Figure 19 is the afterdeck layout of the semi-automatic container fixed system of explanation.

Figure 20 explains a kind of container retrieval methods that goes up on the quarter.

Figure 21 explanation is fixed to a plurality of unit of non-rigid cable during disposing.

Embodiment

In detailed description of the present invention, adopt identical reference number to point out identical parts,, can omit each item parts of assembly parts etc. in order to simplify description such as fixture.Yet, those skilled in the art will understand that, can adopt this common parts as required.

With reference to Fig. 1, Fig. 1 representes seismic data acquisition system of the present invention or container 10.Container 10 is to be made up of fluid-tight casing 12, and fluid-tight casing 12 has the sidewall 14 that limits inner waterproof compartment 16.A seismoreceiver 18 is set at least, clock 20, power source 22, control gear 23 and seismic data recorder 24 in compartment 16.In this embodiment, container 10 is containers independently, and therefore, power source 22 can satisfy all power needs of container 10.Particularly, the seismic data acquisition system that disposes under power source 22 feedwater provides whole power.Likewise, control gear 23 can provide all control function of container 10, and it does not need outside control communication.Container 10 has the weight of negative buoyancy force, therefore, when it is disposed, can sink to the seabed in water column.

The professional is appreciated that container 10 is seismic data acquisition systems independently, and in order to write down geological data, it does not need outside communication or control.Shall also be noted that seismoreceiver 18 is mounted in the container 10, therefore, it does not need outside wiring or connection.Verified, as to describe in detail below utilizing example design, seismoreceiver 18 can be coupled to the seabed effectively, and therefore, the geological data that arrives seismoreceivers 18 through container 10 transmission can not be interfered and be destroyed.

Though below described each basic unit, container 10 can also comprise compass 36 and inclinator 38.In addition, in the preferred embodiment, seismoreceiver 18 is the receiver patteries that are made up of three seismoreceivers, is used for detecting along x the seismic event of each in y and the z axle.Only if explanation particularly, the seismoreceiver that utilizes among the present invention comprises conventional seismoreceiver and other known devices that are used to detect seismic event, and it includes, but not limited to accelerometer.

In another embodiment of the present invention, we find that it is favourable being utilized in last four seismoreceivers placing of tetrahedron configuration, and each seismoreceiver is measured the data on a plurality of planes.In the three-dimensional configuration of standard, three seismoreceivers are placed to spaced-apart 90 ° and each seismoreceiver and measure single x, the signal on y or the z-plane.In the configuration of four seismoreceivers, the orientation of seismoreceiver is perpendicular to tetrahedral plane, and therefore, each seismoreceiver is measured at x, y, the signal in the z coordinate system on a plurality of planes.For example, the geological data on seismoreceiver measurement of x plane and the z-plane.The seismoreceiver configuration of four or a plurality of seismoreceivers is desirable, because in the incident of their seismoreceiver faults on specific plane the redundance of seismic unit can be provided.The neither one system utilizes four or a plurality of seismoreceiver to detect geological data in this manner in the prior art OBS system.

In a key character of the present invention, clock 20 is rubidium clocks.Before this, in seismic prospecting, do not use rubidium clock, the reason of part is that its price is higher than traditional crystal-driven clock.Yet, because container of the present invention 10 is attempted in an orientation of several orientations, can work most effectively, needing to utilize a kind of like this clock, it is insensitive for orientation effect, orientation effect can hinder the operation of traditional prior art crystal clock.In addition, rubidium clock is more insensitive for temperature and gravitational effect, and these effects can hinder the operation of prior art clock under marine environment.

Power source 22 is lithium ion battery preferably.Utilizing under the situation of on-board batteries in prior art OBS system, is not to utilize external cable that power is provided, and the prior art battery is a lead-acid battery, alkaline battery or non-rechargeable battery.The OBS system of prior art does not utilize lithium ion battery.Yet, because the sealing and the stand-alone nature of container of the present invention need be utilized such battery, for example, the type lithium ion battery, it is vapour discharge not, and is to charge easily.

In Fig. 2 and 3, be appreciated that a characteristic of container 10, that is, and the shallow sectional configurations of container 10.Specifically, casing 12 comprises first dull and stereotyped 26 and second flat board 28, and it links together by means of the edge of sidewall 14 along them.In one embodiment, dull and stereotyped 26 and 28 is discoid, and therefore, the overall shape of casing 12 is shapes of wheel.Be appreciated that under any circumstance be appreciated that each characteristic of dull and stereotyped 26,28 is width (W), and the characteristic of sidewall 14 is height (H), the width W of its middle plateform 26,28 is greater than the height H of sidewall 14.Certainly, at flat board 26,28th, under the discoid situation, should use diameter D to replace width W.Yet, for the ease of describing shallow section, also to describe or describe with height H with diameter D no matter casing 12 is circles, the characteristic of shallow section is identical.Though do not limit total shallow section,, in one embodiment, height H is not more than 50% of width W or diameter D.In a non-limitative example, the height H of container 10 is about 6.5 inches, and the width/diameter of container 10 is about 18.5 inches.

As depicted in the figures, container 10 is to be outer symmetrical around its x axle and y axle basically, and therefore, when deployment container 10, the orientation of container 10 is unessential, and it can rest on any one side 30,32, still can be coupled to the seabed effectively.Therefore, with prior art OBS systematic comparison, it is designed to only on " vertically " position, be placed to the seabed.In addition, because container 10 has shallow section, the balance on 34 is normally unsettled on the edge of for it.Therefore, as long as the edge 34 of container 10 touches the seabed, container 10 will be tumbled and be placed on the side in two sides 30,32.

Container 10 also comprises the internal-rib 33 that is used for bearing flat plate 26,28, because container 10 need bear the high pressure characteristics of marine environment.Internal-rib 33 can prevent dull and stereotyped 26,28 " vibration " or motion, otherwise can cause the interference that detects with seismic event.Different with prior art, container 10 described herein is actually the casing of a seismoreceiver, and therefore, the flat board that seismic event can not transmit through container with being distorted arrives seismoreceiver 18.In this, because container 10 has shallow section and solid character, the point of fixity of seismoreceiver 18 in casing 12 becomes inessential, thereby can overcome and the relevant problem of prior art design.

Each unit can comprise unique recognition device, and for example, RF identification (RFID) mark 40 or the similar identification marking that is used to follow the tracks of each unit are if they are to handle according to the mode of following description above deck.Likewise, each unit can comprise position transducers 42, can confirm the position of this unit on the seabed.

Fig. 1 also draw nautical receiving set 44 that is used for gaging pressure and the connector 46 that can communicate by letter with container 10 are if container 10 is above deck or is arranged on the storage rack of following description.Connector 46 can be the pin connector of standard, maybe can be infrared or similar connector, and it does not need hard line when communicating by letter with container 10.By means of connector 46, can provide container 10 and serve and need not get next flat board 26,28 or open casing 12.Specifically, connector 46 can carry out quality control test, extracts the geological data that is write down, make clock 20 synchronously with recharge power source.Because connector 46 only uses on the water, can also provide waterproof, the connector cover 47 of compressive resistance is with protection connector 46.Utilize this connector cover 47, connector 46 can be any AN connector that satisfies this container required function.Connector 46 can not be that the sort of common requirement is born high pressure, the aerial lug of corrosion environment.

At last, Fig. 1 representes to be used to the geometrical clamp 48 chosen wantonly clamp and process container 10.Geometrical clamp 48 is placed on the casing 12, therefore, geometrical clamp 48 and any hardware that extends from container 10, for example, transducer 42 or nautical receiving set 44, between radial angle be obtuse angle or acute angle.In an illustrated embodiment, radial angle is an acute angle.Specifically, after disposing or fetching the device such as container 10, when process container, this device can clash into the side of ship or other equipment, and it might destroy the hardware that stretches out from these devices.Through placing geometrical clamp 48 to the edge of casing 12; Therefore; The radial axle that extends through geometrical clamp 48 from the center of casing 12 is less than 90 °, and it separates with the radial axle that center from casing 12 extends through transducer 42, can reduce the destroyed possibility of this hardware.

In one embodiment of the invention, it does not comprise geometrical clamp 48, but blocking mechanism is fixed to sidewall 14, preferably on such position, can reduce from the destroyed possibility of equipment of container 10 protrusions.A kind of effective blocking mechanism is the center latching mechanism that relative jaw is arranged, and it can be opened and be closed, allows this unit to be fixed to the cable that is used to dispose.Blocking mechanism can also be fixed to sidewall 14 obliquely, so the z axle of the main shaft of blocking mechanism and container 10 is non-intersect.And this orientation can also be protected from the hardware of container 10 protrusions.

Fig. 4 representes the outside surface 50 of one or two plectane 26,28.Specifically, on the outside surface 50 boss 51 can be arranged, for example, ridge or groove are used to strengthen the coupling between container 10 and the seabed.In an illustrated embodiment, boss 51 forms the chevron pattern figure on surface 50.

The Figure 4 and 5 geometrical clamp 54 that also draws is used to clamp and process container 10, and therefore, when container 10 was descended through water column with geometrical clamp 54 fixing cables, plectane 26,28 can keep the position of level basically.Therefore, geometrical clamp 54 can be on the central shaft of a plectane 26,28, or is placed on the plectane 26,28 on the center of gravity of container 10.

Get back to Fig. 4-8, a characteristic of the present invention is around container 10, to comprise cushion pad 52.The cushion pad 52 of three kinds of different configurations of Fig. 4-8 explanation, configuration wherein is referred to as cushion pad 52a, cushion pad 52b and cushion pad 52c.In either case, cushion pad 52 has several functions.The first, when the edge 34 of container 10 touched on the seabed, its shape can make one of two surfaces 30,32 of container 10 arrive the seabed.Another function of cushion pad 52 is protection container 10 and any external device (ED), and for example, it can be the transducer 42 from casing 12 protrusions.At last, cushion pad can have such shape, and it can avoid container 10 to be twined by shrimping net and shrimping chain.Under any situation, cushion pad 52 can have above some or all of these functions.

As stated, cushion pad 52 can have several kinds of designs.In Fig. 5, the cushion pad 52a that draws is the sectional view that is provided with around casing 12, and in Fig. 4, the cushion pad 52a that sees is the top view of container 10.Specifically, cushion pad 52a has circle or crooked section 55.As shown in the figure, cushion pad 52a comprises the shoulder 56 that is embedded in the groove 58, and groove 58 is by centering on the edge limited of casing 12.The part 60 of cushion pad 52a extends to outside the edge of casing 12, can protect the edge 34 of casing 12.Because the circular nature of cushion pad 52a, if container 10 begins to be parked on the seabed, then container 10 rolls or tilts on the coupling surface of flat board 26,28, thereby makes flat board 26,28 and seabed keep vertical.In addition, the function of cushion pad 52a can protect container 10 to exempt from vibrations, and during process container 10, can protect the operator.

Fig. 6 and the another kind of cushion pad section of 7 expressions, wherein cushion pad 52b has wedge section 62.Likewise, cushion pad 52b comprises the shoulder 56 that is embedded in the groove 58, and groove 58 is by centering on the edge limited of casing 12.The part 64 of cushion pad 52b extends to outside the edge of casing 12, can protect the flat board 26,28 and edge 34 of casing 12.Cushion pad 52b shown in Fig. 6 and 7 also comprises cavity 66, and cavity 66 can be used as the handle of holding with process container 10.In the embodiment of cushion pad 52b, be appreciated that we require the container 10 of cushion pad 52b that such orientation is arranged on the seabed, the lozenges of cushion pad 52b is downward.Therefore, in this embodiment, dull and stereotyped 28 is tops of container 10, and flat board 26 is bottoms of container 10.

In the cushion pad 52b of Fig. 6 and 7 embodiment, additional cushion pad part 68 is installed on the top board 28.Cushion pad part 68 has circular cross section 70, and it carries out the transition to wedge section 62.In one embodiment, beaded glass can mold pressing or is included in the cushion pad part 68, is used to increase the buoyancy of cushion pad part 68.Through being increased in the buoyancy at container 10 tops, can guarantee that container 10 has correct orientation, that is, when container 10 transmission leant on and be parked on the seabed through water, wedge shape cushion pad 52b faced down.

When container 10 was coupled to the seabed, chain or other line can be pulled to container 10, and this chain is just along the lozenges slip of cushion pad 52b and the top of arrival container 10.Cushion pad part 68 can also prevent that chain or line from catching any equipment, and this equipment possibly be that the planar surface towards last from container 10 protrudes.

Fig. 8 representes the cushion pad 52 of another embodiment, and wherein cushion pad 52c includes the baffle plate or the wedge 72 of narrow limit 74 and broadside 76.Broadside 76 is fixed, and links between two geometrical clamps 78, and geometrical clamp 78 is fixed to the sidewall 14 of casing 12.Preferably, geometrical clamp 78 has such shape, and their outward flange 80 is formed with the transition face of the substantially flat of 72 of wedges.During disposing, container 10 can be parked on any one platen surface 26,28, and the wedge 72 of hinge joint hangs down into the seabed, and it forms inclined-plane or sleeve, and when pulling container 10, shrimping chain or similar line are on inclined-plane or sleeve.In this manner, cushion pad 52c forces chain to arrive the top of container 10, thereby prevents that this chain from biting container 10.

Fig. 9 representes softness of the present invention, non-rigid cable 82.Specifically, cable 82 comprises inner core 84 and surrounding layer 86.Inner core 84 is to be processed by nonrigid material.In the present invention, nonrigid material is strand or fibrous non-conducting material, for example, and rope.We find that composite fibre materials is a preferable material, though the present invention also can utilize other material.In a non-limitative example, synthon are polyester.In one embodiment, inner core 84 is to be made up of the fibroplastic single rope strand 88 of the rope that reverses, and wherein rope strand 88 is woven in and forms inner core 84 together.Surrounding layer 86 is to be embossed on the inner core 84.Also have rib or groove 90 on the surrounding layer 86, can reduce the resistance in water.In one embodiment, surrounding layer 86 can be that polycarbamate is processed.

Be appreciated that cable 82 is to be processed by non-conducting material because container 10 does not need PERCOM peripheral communication or power supply.Above-mentioned cable 82 is low elasticity and the high strength cable that does not have creep.Different with the rigidity cable of prior art, cable 82 does not have torque, that is, and and reversing under load.In addition, with the rigidity of prior art and semi-rigid cable relatively, cable 82 in light weight also handled easily.Therefore, utilize cable 82, can be along receiver line deployment container 10, wherein each container 10 is to be fixed along cable 82 with certain spacing.

Shown in Fig. 9 and 10, a characteristic of the present invention is to utilize broken string connector 92 the cable segmentation and between each cable section 94.Connector 92 comprises first assembly parts, 96, the first assembly parts 96 and is embedded in second assembly parts 98.Shear pin 100 is inserted through assembly parts 96,98, and these two assembly parts are fixed together.Utilize the method for any standard, can make these assembly parts be fixed to the adjacent free end of cable section 94.In one embodiment, each assembly parts 96,98 has endoporus 102,104 respectively, and it is to extend to second end 108 from first end 106.At second end 108, each assembly parts has the aperture 97,99 of the opposite flank of passing each assembly parts.In the time of in assembly parts 96 are placed on second assembly parts 98, aperture 97,99 is aimed at, shear pin 100 embeds the aperture 97,99 of passing through aligning, and at second end 108 separately assembly parts 96,98 is connected.

At they first ends 106 separately, being limited in each hole 102,104 is shoulder 110.Each assembly parts is inserted on the free end of cable 98, and block 112 is fixed to this cable, and therefore, block 112 is near shoulder 110, and clamps assembly parts at an end of cable.In another embodiment, the endoporus that extends to first end 106 from second end 108 can be tapered, and utilizes the block greater than this diameter of bore to make assembly parts be fixed to the free end of cable.

Under any situation, each assembly parts 96,98 is fixed to an end of cable section 94, and therefore, when assembly parts were fixed together, a plurality of cable section formed long cable.If the tension force in the long cable is during greater than the shearing limit of shear pin, then shear pin just breaks off, thereby long cable is separated.Because shear pin is inserted into easily and removes, under particular environment or situation, can easily adjust the shearing limit that connects cable.For example, under certain conditions, possibly require to shear the shear pin that the limit is 5000lbs, and under other situation, possibly require to shear the shear pin that the limit is 8000lbs.If connector is separated under shearing force, in case then cable is fetched, the shear pin through replacement is broken off can easily retighten these assembly parts.

This breakaway-element system is desirable, because when the tension force of cable exceeds its working limit, can mesh apace.For example, in the rigidity and semi-rigid cable of prior art.Sometimes can produce 30000lbs or bigger tension force.The cable of engagement possibly cause damage and injury fast under this load.Better is to fetch one section cable that separates, rather than suffers from this damage and injury.

In another characteristic of this system, the disconnection tension force of cable that is fixed to container is greater than the disconnection tension force of the connector of fixing cable section.Therefore, in the situation of breaking off tension force, cable section is before container and cable separate, just to break off.This is desirable because the location and fetch one section cable that can mesh than locate and fetch the tank capacity that maybe be separates with cable many.

Figure 12 and clamp system 120 of 13 expressions, it allows seismic unit directly to be clamped on one section cable, and need in many prior-art devices, not cut cable.Clamp system 120 comprises the sleeve 122 in tape spool hole 123, can make sleeve 122 be assembled to (not shown) on the cable through it.Clamp system 120 also comprises the convex shoulder 124,126 of mold pressing, and they are arranged on the opposite end of sleeve 122.Each end of sleeve 122 is passed in aperture 128, preferably on x and y plane perpendicular to 122 in sleeve.In an illustrated embodiment, sleeve 122 comprises the fixedly annular section 130 of seismic unit.In another embodiment, sleeve 122 can be the tubulose that does not have annular section 130.Sleeve 122 can integrally be processed; Maybe can be two and half parts that are sandwiched in together; Shown in figure 13, second half part 134 of first of its middle sleeve half part 132 and sleeve is clamped around the cable (not shown), and utilizes wire clamp 136 to be fixed on together.

In the time of on being installed to cable, a pin passes aperture 128, is used for fixing the clamp system 120 that slides from cable.Convex shoulder 124,126 is embossed into the two ends of sleeve 122, and it helps is that fixed pin is fixed.The two ends of sleeve 122 can also be hydraucones, and it helps convex shoulder 124,126 to be fixed.

Therefore; Not to cut cable and between two free ends of cable, fix to clamp mechanism; Sleeve of the present invention can clamp or slide on one section cable; And under the condition of not cutting cable, be fixed, can prevent the rotation of clamp system 120 along utilizing pin to fix this mechanism on x and the y plane, and prevent endwisely slipping along cable with respect to cable.

The afterdeck of boats and ships is disposed and fetched to Figure 14-19 expression seismic system.Figure 14 roughly draws one to be had the deployment of the seismic system of spar deck 202 and fetches boats and ships 200, the earthquake deployment is set on deck 202 and fetches system 204, is used for disposing and fetching cable 206.

The parts that system 204 was disposed and fetched in earthquake are storage racks 208, are used to deposit the OBS unit that is fixed to cable 206.Should be appreciated that storage rack 208 is scalable, deposit the space constraint of needs and boats and ships to satisfy special container.In Figure 14 and 15, four storage racks 208 are provided so that make the container storing capacity maximization of particular boat 200.As can be seen from Figure 16, each storage rack 208 comprises multirow 210 and multiple row 212 grooves 214, wherein is arranged to place a container 216 in each groove 214.Though the size of groove 214 can change with the size of the concrete OBS unit of depositing, the disc-shaped container that the storage rack 208 that the preferred embodiment is described is used to place above-mentioned shallow section, it is often expressed as container 10.With reference to Figure 17, each groove 214 has COM1 218, when container 216 is placed in the groove 214, allows between container 216 and main control station (not shown), to communicate.In one embodiment, COM1 218 is to link with container 216 through the connector 46 shown in container 10 (see figure 1)s.As stated, link can be the hard lead between COM1 218 and the connector 46, maybe can utilize some other method, for example, and infrared connector.No matter be any situation; In the time of in being placed on groove 214, can be loaded in information recorded on the container 216 down, can recharge to element cell through port 218; Can on this unit, carry out quality control checking; Can synchronous clock, can the activated operation, and can encourage this unit again.

In the storage rack 208 of another embodiment, each row is that this travelling belt is semicircle or U-shaped preferably by the carousel replacement of single lamination with each row groove.Each carousel comprises cylinder, allows record cell to move along the conveyor path of travelling belt mode, arrives adjacent with COM1 until this unit.The shape of conveyor path is semicircle or U-shaped preferably, and the permission record cell is inserted into first end of travelling belt and takes off from second end.This configuration allows container to be inserted into and to take off from travelling belt simultaneously.As an example, first end of travelling belt can be adjacent with the cleaning station, be used to clean the container of fetching from the seabed, and second end of travelling belt can be adjacent with the deployment station, allows container to be fixed to again and dispose on the cable.

No matter use which kind of storage system, storage system can be configured to the Container Dimensions of 8 ' of standard * 20 ' * 8 ', and therefore, the container ship of storage system and any seismic unit standard capable of using of wherein placing is easily to transport.

At Figure 15, can find out that in the system 204 of an embodiment, the afterdeck system is robotization basically in 17 and 18.

Except storage rack 208, the container deployment system 219 that also draws, it is adjacent with storage rack 208, and extends to the edge on the deck 202 adjacent with the water surface.Pick up and place system 220 is used for mobile unit 216 between storage rack 208 and deployment system 219.Though can utilize various robotizations or semi-automatic picking up and place system 220; But in an illustrated embodiment; One or more single shaft round transport devices 221 are used for mobile containers 216 between one or more grapple arms 223; Grapple arm 223 can be at storage rack 208, mobile containers 216 between round transport device 221 and the deployment system 219.

More particularly, deployment system 219 comprises: be parallel to the travelling belt rolling bed 226 of non-rigid cable 206 and dispose carriage 228 with the container of travelling belt 226 motions.Cable machine 222 and cable reel/case 224 are placed to straight line and move non-rigid cable 206, and it is adjacent with deployment system 219 and on the side of boats and ships.When cable 206 is laid in the water continuously, that is, be in operation, container 216 is fixed to non-rigid cable 206, wherein utilizes carriage 228 to quicken the speed that container 216 reaches cable 206.When the speed of the speed of cable 206 and container 216 was basic identical, container 216 was fixed to cable 206, at this moment, discharged containers 216 and continued from carriage 228 and move along the travelling belt 226 that is advanced by cable, and container is that this cable is fixing.

Travelling belt 226 has first end 230 and second end 232; Wherein pick up the vicinity that is placed on first end 230 with place system 220; And one or more cable machines 222 are placed on the vicinity of second end 232, and therefore, container 216 roughly is to move to second end 232 along travelling belt 226 from first end 230.Container carriage 228 is motion on track or framework 234 equally, and part is along one section travelling belt 226 at least.When preparing for deployment container 216, it is to utilize grapple arm 223 to be left behind from the storage rack 208, and on round transport device 221, moves to first end, 230 position adjacent with travelling belt 226.Grapple arm 223 is placed containers 216 to carriage 228, and it is placed on first end, 230 tracks adjacent 234 with travelling belt 226 equally.In case container 216 is placed on the carriage 228, carriage 228 is accelerated to second end 232 of travelling belt 226 along travelling belt 226.When the acceleration of carriage 228 reached the speed of cable 206, container 216 was clamped or is fixed on the cable 206.In one embodiment, container 216 comprises the clip of being with pawl, in case reach fixed speed, clip can be closed around cable 206.In this embodiment, container 216 can directly be clamped on the cable 206, or can be clamped the fixed muffle that on cable 206, is provided with.In either case, cable machine 222 continues pulling cable 206, and cable 206 is moved along travelling belt 226, is deployed on the edge of ship 200 until it.

One or more RFID readers 240 can be along picking up and place system 220 is placed with deployment system 219, be used to follow the tracks of special container 216 along the deck 202 move.This tracking is for above-mentioned deployment and to fetch system 204 be desirable especially because container 216 has independently character, it does not require each unit on deck 202 by operation and be inserted into 208 last times of storage rack and keep specific order.In other words; Because each container 10 of the present invention is independently; And the sub sea location of each container and orientation information are to be recorded in the container and the geological data that on this position, writes down; Fetched from the ocean when them, when operating and depositing, these unit do not need in order or the receiver line is held in proper order.In this respect, each adjacent unit does not need to pass through system 204 along specific order, and need on storage rack 208, not be adjacent to deposit, but can be inserted into randomly on the storage rack 208.

The professional is appreciated that lay cables 206 is constantly controlled to the speed in the water, in order that the irregular and uncertain motion of compensation boats and ships 220 in water.In a preferred embodiment, can adjust the speed that is used to transmit with the carriage 228 of the fixing unit 216 of cable 206 continuously, thereby allow container 216 when operation, to be fixed to smoothly on the cable 206.

Though the travelling belt 226 of above description; Carriage 228 and cable 206 should be understood that still that along line spread the non-rectilinear arrangement is also contained among the present invention; As long as this arrangement can be quickened the oceanic earthquake unit, can be fixed on the cable of motion in order to make this unit.

As stated, can utilize deployment system 219 to put into practice a kind of method of the present invention, that is, be in operation fixing and discharge seismic unit 216, and stop the motion of cable 206 need be in not being routed to water the time.This method can be used in combination with deployment system 219; It comprises the steps: to provide one with the given speed motion and along the cable of cable path; Seismic unit is quickened in the path adjacent with this cable path, edge; Until this seismic unit with the speeds of cable roughly, and when the two moves fixedly seismic unit to cable.According to the method, seismic unit can be fixed on the cable and be discharged in the water, during disposing, need not stop and starting cable and boats and ships, thereby reduces to lay one period that cable is required along the receiver line.

In another embodiment of the present invention shown in Figure 19, semi-automatic travelling belt 250 is to intersect with the cable of from reeler/cable case 224, pulling out and utilize cable machine 222 to lay 206.In this case, storage rack 208 with pick up the either side that is arranged in travelling belt 250 with place system 220, its configuration is similar to shown in Figure 15.Yet, be not to make cable 206 adjacent, but cable 206 spatially separates with travelling belt 250 with travelling belt 250.In this embodiment, travelling belt 250 is to be limited at first end 252 and second end 254.The part 256 of travelling belt 250 is crooked, the cable 206 that the cable 206 that allows container 216 motions to leave fixed container 216 arrives at travelling belt 250 second ends 254.Second travelling belt 258 that also draw among the figure, it is before being fixed to cable 206, to be used for storing containers 216.Second travelling belt 258 be from pick up and first end 254 of place system 220 position adjacent mobile containers 216 to travelling belt 250.

Fixed station 260 is limited on the joining of cable 206 and travelling belt 250.At fixed station 260, oceanic earthquake unit 216 is fixed to cable 206, and the unit that is fixed is released in the water subsequently.In one embodiment, cable pawl 262 is placed on the downstream of fixed station 260.When deployment container 216, cable pawl 262 is that cable 206 is clamped before fixing securely in 216 be fixed stations 260 in the unit, thereby removes the line tension at cable pawl 262 upper reaches, allows unit 216 to be safely secured to cable 206.This is desirable especially in semi-automatic configuration, wherein the operator manually fixed cell 216 to cable 206.Under any situation, cable pawl delivery system 264 can be included in the fixed station 260, when in discharging cable pawl 262 and cable 206, tension force being arranged, can reduce the possibility that operator and cable 206 are adjacent or contact.In this preferred embodiment, delivery system 264 comprises first button 266 and second button 268, must start this two buttons simultaneously, discharges in order to make cable pawl 262.So, it is desirable to, single operation person must sequentially make with the hands with excitation delivery system 264, and therefore, the function of delivery system 263 is safety features, and it can reduce operator's danger.

Though there is no need; But in the embodiment of the invention shown in Figure 19, two cable deployment systems of equipment on afterdeck, one of them system is 202 port side on the deck; And another system is 202 starboard side on the deck; Between them, place storage rack 208, pick up and place system 220 and travelling belt 250.Travelling belt 250 bends to two sides, and each cable deployment system comprises reeler/case 224, cable machine 222, fixed station 260 and cable pawl 262.This duplex system has redundance, and can not work a system time, can guarantee that seismic operations can not postponed.

A function of seismic data recording unit of the present invention is the continuous operation of this unit.In this characteristic of the present invention, before earth surface, start data acquisition in this unit of placement.In a preferred embodiment, the oceanic earthquake unit is energized, and begins image data before in being deployed to water.The system that before disposing, is energized and begins image data is stable needing the detection signal times prior.The possibility that look-at-me detected when this can reduce the variable condition of electronic operation.Certainly, under the situation of this continuous data collecting unit, novelty is this unit " continuously " character, and this function can be applicable to land or under the environment of ocean.

In similar embodiment, before placing, start data recording along the receiver line.For example, the marine seismic data record cell is just to be energized on disposing boats and ships the time, and begins image data before in being deployed to water.Likewise, this can make the unit stablized in needs signal record times prior.For this purpose, system stability key element is a clock stable.In the various key elements of this system, well-known, the stable long time that needs usually of clock.Therefore, in one embodiment of the invention, no matter this unit is to detect data or record data continuously continuously, always clock keeps work.

In any one method of above two methods, under the continuous service condition of interrupt location not, can in the several cycles of disposing and fetching, utilize this unit.Therefore, activated operation before disposing.When proceeding to write down, this device is disposed, and fetches and disposes.As long as storer is enough, can in the several cycles of disposing and disposing again, keep this continuous record.

At this on the one hand, comprise in the geological data unit under the situation of takeup type storer, even record continuously when in earthquake detection, not using.Therefore, except above-mentioned advantage, starting or sign on there is no need.In addition, the continuous recording function of utilizing the takeup type storer is as the backup of image data before the record, until before data be written into.Another advantage is that as long as clock is synchronous, this device can all be ready to dispose at any time.

Under the situation that the unit is proceeded by record after fetching, can carry out customary operation, for example, and data aggregation, quality control test, and battery charge, and do not need interruption logging.An advantage of this system is can utilize this device recording quality control test data, rather than when carrying out the quality control test, write down geological data.In other words, the data input is to change over quality control data from geological data.In case completion quality control, this device can recovery record geological data or other required data, for example, with position and regularly relevant data.

In a preferred embodiment of the invention, the oceanic earthquake unit comprises inertial navigation system, is used for x, y and the z positional information of measuring unit when transmitting through water column and being parked in the seabed.Generally speaking, this systematic survey is along x, the motion of each direction in y and the z direction, and around each x, the angular motion of y and z axle.In other words, 6 degree of freedom of this systematic survey unit during from boats and ships to thalassogenic movement, and utilize this metrical information to confirm the position on the seabed.In this preferred embodiment, utilize accelerometer, can confirm this x, the information of y and z direction.Utilize inclinator and compass or other aligning device, for example, gyroscope can be confirmed the orientation at angle, that is, tilt and direction.In one embodiment of the invention, utilize three accelerometers and three gyroscopes, can produce the inertial navigation data that is used for confirming this unit sub sea location.

Under any situation, through making up accelerometer and inclination and directional information, can confirm initial position and speed when this unit is in being released to water column as the function of time, this unit is through the motion path of water column.The more important thing is that can confirm the position of this unit at the bottom of water column, that is, this unit is in the position in seabed.Sample to obtain required degree of accuracy at enterprising line time of the suitable time interval.Time sample between the various measurement components can be different.For example, be used for the sampling of data of confirming that direction obtains from compass, and be used to measure the sampling of data speed that inclination obtains from inclinator and be slower than the sampling of data speed that obtains from accelerometer.Before this, other one or more accelerometers of ocean unit by using of neither one are confirmed the position according to the method.At this on the one hand, this method and system can replace other technology to confirm the needs of sub sea location, for example, and through the sound position transducers, or the like.

Although above description is arranged, the function of this location determining method is specially adapted to above-mentioned continuous recording method.Because the unit has been prepared record data when being discharged into the top of water column, x, y and z positional information can be by this unit records easily, and become the part of this unit partial data record.

The present invention also provides unique retrieval methods a kind of and the OBS unit 300 that cable is fixing, and is shown in figure 20.Specifically; We find; The cable 302 of fetching on boats and ships 306 tail ends 304 is when boats and ships move front end 308, at first to put down cable 302 along the direction of cable; In order that the resistance when reducing to take out cable on seabed 310, and prevent excess tension or " pulling force " of cable 302, this situation is very general in the prior art retrieval methods.Specifically, in the method for the invention, the water drag force on OBS unit and the cable cable 302 is slowed down or upset after boats and ships 306, as shown in 312, utilize water column as shock absorber and reduce excessive tension force.

In this method, the speed of adjustment boats and ships 306 is not like so important in the retrieval methods of prior art.In addition, when boats and ships are edge directions opposite with it when moving, because cable 302 is to overturn 312 in the water after boats and ships, it is unlikely twined by the thruster of boats and ships, and this situation is contingent in utilizing art methods.Certainly, the professional understands, in the method for the invention, can on the bow of boats and ships or stern, take out cable, as long as these boats and ships are to move along the direction of cable, and the taking-up of cable is the tail end at boats and ships.

Under any situation, the delivery system 314 that floats also can be fixed to cable, normally in the one or both ends of being disposed cable, can make the cable of part rise to the water surface at least, utilizes the above method of describing to fetch easily and is fastened by cable.This method is known in professional domain, and can comprise a floating installation, and it is to be released near the seabed in the required time of fetching, or swims in the floating installation on the water surface, but when disposing, keeps fixing with cable.

Non-rigid cable of the present invention is also contained in unique dispositions method of container shown in Figure 21.Specifically, utilize non-rigid cable 402 that two OBS unit 400 bolts are tied.Cable 402 is deployed in the water column 404 with OBS unit 400.Because the negative buoyancy force of OBS unit 400 is far longer than the negative buoyancy force of non-rigid cable, these unit have and sink to the trend through water column before the cable, and therefore, the cable section that connects two OBS unit is slowed down between two unit, shown in 406.Cable decline is fracture through the drag force function of water column, thereby the decline of the unit that slows down and permission unit are placed on easier Be Controlled on the seabed 408.Specifically, the effect that slows down can be controlled the orientation of each unit, for example, and with those unit that cooperate of wedge shape cushion pad shown in Fig. 6 and 7.In addition, non-rigid cable gently is parked on the seabed unit, allows each unit and seabed that consistent coupling is arranged.

This is the improvement to art methods, because art methods utilizes rigidity or semi-rigid cable to dispose the OBS unit.This cable has and can sink to the trend through water column quickly with each unit.In other words, this cable does not have with of the present invention in light weight, the drag force characteristic that non-rigid cable is identical.In cable that utilizes this art methods and OBS unit, when the unit transmitted through water column fast, the orientation of each unit was that instability very easily takes place, for example, and vibration or upset.

Another advantage of dispositions method of the present invention is in a single day when disposing cable and being parked on the seabed, non-rigid cable can loosely be formed between two adjacent unit.In fact, we find, when general deployment operation, as stated, the actual interval when the non-rigid build-out between two unit generally is far longer than these two unit and is parked on the seabed.In other words, in case be parked on the seabed, the non-rigid cable between adjacent cells has very big slackness.Therefore, non-rigid cable of the present invention can not be opened two unit separations.Under any situation, ship operation person can be utilized in the slackness that forms in the non-rigid cable, proofreaies and correct its receiver line when being laid.Specifically, if lay the boats and ships drift or make the receiver line that is laid depart from desirable receiver line, then the boats and ships on the water surface can be reorientated, and make remaining non-rigid cable and the unit that is fixed begin to turn back on the desirable receiver line.The cable slack degree that the non rigid nature of cable causes allows the operator to get back on the receiver line, and makes remaining each unit roughly rest on them along on the ideal position of expection line.Contrast therewith, if this unit is fixed on rigidity or the semi-rigid cable, then this cable has no adjustable slackness, and the remaining element on desirable receiver line can not rest on along on the ideal position of receiver line.In addition, in case OBS unit 400 is on the position in seabed, the cable 402 between these unit relaxes, shown in 410.This can make each unit " uncoupling ", and prevents the transmission of unnecessary noise along cable.

At clock 20 is under the situation of crystal clock, and can be used for proofreading and correct gravity from the information of inclinator 38 influences clock-timed.In the prior art, the information of inclinator only is used to correct seismic data.Except utilizing crystal clock Tc influence, there is not the crystal of other types to can be used for the correction of this clock.Therefore, a characteristic of the present invention is, utilizes the information correction clock-timed inaccuracy of inclinator, and it originates from the gravitational effect that affacts on the crystal clock.This clock correction can carry out airborne container when data recording, or the data that are applied to extract from container.

Likewise, the information from inclinator 38 can be used for the mathematics balancing run to geological data.Correct seismic data is in order to adjust orientation in the prior art, and this correction is based on the mechanical gimbal of installing in the prior art OBS system of boat-carrying.Yet typical mechanical gimbal can cause the deterioration of data fidelity, and this is because the resistance that gimbal receives on its ship.In a characteristic of the present invention, we confirm that the very flat adjustment of data or " mathematics balancing run " are superior to the normal flat method of operating of prior art.Therefore, the information of the present invention's inclinator capable of using according to mathematical method adjustment container the geological data when vertical orientated.This mathematics balancing run can be implemented on the airborne container when data recording, or the data that can be applicable to extract from container.

In addition, the information from compass 36 can be used for further improving the rotation orientation of mathematics balancing run with adjustment unit.Specifically, compass data can combine with the tilt meter data in the mathematics balancing run, more fully proofreaies and correct because the geological data that the container orientation is influenced.

Though described some characteristic of the present invention and embodiment here in detail, understand easily, in the spirit and scope of following claims, the present invention includes all improvement and raising.

Claims (12)

1. submarine earthquake data gathering system comprises:

A. rubidium clock; With

B. at least one seismoreceiver.

2. submarine earthquake data gathering system comprises:

A. mathematics gimbal; With

B. at least one seismoreceiver.

3. submarine earthquake data gathering system that is used for being deployed in the seawater post, said system comprises:

A. at least two marine seismic data collector units; With

B. make said unit fasten the non-rigid cable of softness together mutually.

4. according to the system of claim 3, wherein said cable has first drag force, and there is second drag force said unit, and second drag force is less than first drag force of this cable.

5. according to the system of claim 3, wherein said cable is non-conductive.

6. method that is used to write down the underwater seismic data comprises:

A., an independently seismic data acquisition system is provided, and this system has a seismoreceiver at least, from clock and seismic data recorder;

B., a major clock is provided;

C. in water, dispose before the seismic data acquisition system, synchronously said from clock and said major clock;

D. in water, dispose before the seismic data acquisition system, the operation of starting seismoreceiver is to detect geological data;

E. in water, dispose the seismic data acquisition system;

F. in hydrolocation seismic data acquisition system;

G. by seismic data recorder log-on data record;

H. utilize seismic energy source producing a voice signal, and propagate in the soil under water;

I. from water, fetch the seismic data acquisition system; With

J. after from water, fetching the seismic data acquisition system, retrieve data recorded on seismic data recorder.

7. method that is used to write down the underwater seismic data comprises:

A., an independently seismic data acquisition system is provided, and this system has a seismoreceiver at least, from clock and seismic data recorder;

B., a major clock is provided;

C. in water, dispose before the seismic data acquisition system, synchronously said from clock and said major clock;

D. in water, dispose before the seismic data acquisition system, by seismic data recorder log-on data record;

E. in water, dispose the seismic data acquisition system;

F. in hydrolocation seismic data acquisition system;

G. utilize seismic energy source producing a voice signal, and propagate in the soil under water;

H. from water, fetch the seismic data acquisition system; With

I. after from water, fetching the seismic data acquisition system, retrieve data recorded on seismic data recorder.

8. according to the method for claim 7, also comprise step: after from water, fetching the seismic data acquisition system, retrieval data recorded on seismic data recorder.

9. according to the method for claim 7, also comprise step:

A. in water, dispose after the seismic data acquisition system, recognition time beginning at interval, and before from water, fetching the seismic data acquisition system, finish should the time interval;

B. wherein identification the time interval during data recorded retrieve from seismic data recorder.

10. according to the method for claim 7, also comprise step: synchronous seismic energy source and master clock.

11., also comprise step: locate the seismic data acquisition system adjacent with ocean bottom soil according to the method for claim 7.

12., also comprise step: coupling seismic data acquisition system and soil under water according to the method for claim 7.

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