CN208026881U - A kind of pull-type marine electromagnetic data acquisition cable - Google Patents
A kind of pull-type marine electromagnetic data acquisition cable Download PDFInfo
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- CN208026881U CN208026881U CN201820436992.6U CN201820436992U CN208026881U CN 208026881 U CN208026881 U CN 208026881U CN 201820436992 U CN201820436992 U CN 201820436992U CN 208026881 U CN208026881 U CN 208026881U
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Abstract
The utility model provides a kind of pull-type marine electromagnetic data acquisition cable,Including acquiring cable housing,The acquisition cable housing is strip and the cavity of inner hollow,Described cavity one end is equipped with the cable hole communicated with inside cavity,Non magnetic cable and cable are equipped in the cable hole,One end of the non magnetic cable is connected with inner cavity of the cavity far from cable hole one end,The other end of the non magnetic cable is located at containment portion by cable hole,The inside cavity is laid with n electrode support,The n is positive integer,The electrode support is connected with cavity inner wall,Each electrode support corresponds to acquisition cable housing position and is equipped at least one inside and outside penetrating electrode mounting hole,The tantalum capacitance unpolarizable electrode being connected with counter electrode holder is equipped in the electrode mounting hole,Signal gathering unit is equipped in the cavity between two electrode supports.The utility model has the beneficial effects that reducing electrode polarization effect, noise level is reduced, convenient for detecting faint marine electromagnetic field signal.
Description
Technical field
The utility model is related to technical field of sea exploration, more particularly to a kind of pull-type marine electromagnetic data acquires cable.
Background technology
Abundant resource is contained in ocean, and 70% earth surface is covered by ocean, oil, natural gas and rare metal
In seabed there are extremely abundant reserves etc. various mineral resources, these resources need to be found out and develop and use.In seafari
In technical field, marine electromagnetic data has great importance to the explorations such as seabed mineral, petroleum resources and overall merit.
Existing marine electromagnetic data acquisition mode may include mainly two kinds：The first is marine electromagnetic data acquisition cable
Towing moves ahead or is laid in seabed in the seawater, and marine electromagnetic (electric current) excitaton source drags excitation in water, the ocean that tow
Electromagnetic data acquires towing cable or sinking is laid in the electromagnetic data acquisition cable synchronous acquisition marine electromagnetic data in seabed.It is for second
Independent marine electromagnetic data acquisition station is sunk to the bottom, and marine electromagnetic (electric current) excitaton source drags excitation in water, the electromagnetism number sunk to the bottom
Sea-floor electromagnetic data are acquired according to acquisition station.
At present the becket that the electrode along cable direction electric field component is common is measured with marine electromagnetic towing cable in industry
Electrode does not use unpolarizable electrode, therefore the polarity effect of its electrode itself is larger, causes the noise level of electrode higher,
It is unfavorable for detecting the faint ocean electric field signal of large offseting distance or the following deep formation in seabed.And sinking type marine electromagnetic data
The widely used silver chlorate unpolarizable electrode of acquisition station preserves and its is special due to needing to be immersed in always in seawater or brine
Cylindrical-shaped structure, make it be not used to measure the ocean electric field point along cable direction on pull-type marine electromagnetic data acquisition cable
Amount.
Invention content
Purpose of the utility model is to solve the deficiencies of above-mentioned technology, and it is stable, reliable in quality to provide a kind of performance
Pull-type marine electromagnetic data acquires cable.
The technical solution of the utility model is：
A kind of pull-type marine electromagnetic data acquires cable, including acquisition cable housing, the acquisition cable housing for strip and
The cavity of inner hollow, described cavity one end are equipped with the cable hole communicated with inside cavity, are equipped in the cable hole non magnetic
One end of cable and cable, the non magnetic cable is connected with inner cavity of the cavity far from cable hole one end, the non magnetic cable
The other end containment portion is located at by cable hole, the inside cavity is laid with n electrode support, and the n is positive integer,
The electrode support is connected with cavity inner wall, and each electrode support corresponds to acquisition cable housing position equipped at least one inside and outside penetrating
Electrode mounting hole, the tantalum capacitance unpolarizable electrode being connected with counter electrode holder, the chamber are equipped in the electrode mounting hole
Electric field signal collecting unit is equipped between internal two electrode supports, the electric field signal collecting unit is connected with cable, described
It acquires cable housing and forms seal cavity with non magnetic cable, capacitance bracket and cable seal.
The electrode mounting hole is a looping pit, and the tantalum capacitance unpolarizable electrode is annular, the tantalum capacitance not pole
The inner circle of polarizing electrode is set in corresponding electrode support outer circle.
The tantalum capacitance unpolarizable electrode is rectangle, and the electrode mounting hole is 4 uniformly distributed rectangular openings, the tantalum capacitance
Unpolarizable electrode is located in rectangular opening and is connected with electrode support outer round surface.
The acquisition cable housing includes guiding cable housing and signal cable housing, and the guiding cable housing is hemisphere, described
Signal cable housing is cylinder, and the hemispheroidal diameter is equal with the diameter of cylinder, the hemispheroidal median plane and circle
Cylindrical one end is connected, and the electrode support is located at signal cable jacket internal.
The surface that the tantalum capacitance unpolarizable electrode is connected with electrode support is equipped with contact conductor, the signal gathering unit
It is recorded deeply equipped with electric field signal amplifier, analog-to-digital conversion module, three-component attitude transducer, three-component magnetic field sensor, thermohaline
Instrument, data memory module and data transmission module, contact conductor and electric field between two adjacent tantalum capacitance unpolarizable electrodes
The input terminal of signal amplifier is connected, the signal output of the output end, three-component attitude transducer of the electric field signal amplifier
The signal output end of end and three-component magnetic field sensor is corresponding with the input terminal of analog-to-digital conversion module respectively to be connected, and the modulus turns
The signal output end of the output end and salinity temperature that change the mold block is connected with the input terminal of data memory module respectively, the number
It is connected with the input terminal of data transmission module according to the output end of memory module.
Optical cable is equipped in the cable hole, the signal gathering unit is additionally provided with acquisition cable photoelectric conversion transmission module, institute
It states acquisition cable photoelectric conversion transmission module and is equipped with electric signal input end and light signal output end, the acquisition cable opto-electronic conversion transmission
The electric signal input end of module is connected with the input terminal of data transmission module, the light letter of the acquisition cable photoelectric conversion transmission module
Number output end is corresponding with optical cable to be connected.
The acquisition cable outer surface is laid with buoy, the distance between described buoy range 100m-500m, described floating
GPS timing locating modules are equipped in mark, the GPS timings locating module is defeated by cable and the data memory module in acquisition cable
It is corresponding connected to enter end.
The width of the electrode support is more than or equal to the width of tantalum capacitance unpolarizable electrode, the tantalum capacitance unpolarizable electrode
The outer surface of outer surface and acquisition cable housing corresponding position is in same level.
Strengthening support is equipped between the electrode support madial wall, the strengthening support is cruciform shape, in the strengthening support
The heart is equipped with mounting hole, and 4 ends of the strengthening support are connected with electrode support madial wall, and the non magnetic cable runs through mounting hole
It is connected afterwards with inner cavity of the cavity far from cable hole one end, the collecting unit is by band or cable bundle in non magnetic cable
On.
The distance between two adjacent electrode holders ranging from 10m-100m.
The utility model has the beneficial effects that：The electrode polarization effect of pull-type marine electromagnetic data acquisition cable can be reduced
It answers, reduces the noise level of electrode, convenient for detection large offseting distance or the faint marine electromagnetic field letter of the following deep formation in seabed
Number, greatly improve the q&r of the marine electromagnetic data of pull-type marine electromagnetic data acquisition cable acquisition.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the parts Fig. 1 A enlarged diagrams；
Fig. 3 is the parts Fig. 1 B enlarged diagrams；
Fig. 4 is the sectional structure chart of annular electrode and electrode support；
Fig. 5 is the sectional structure chart of rectangular electrode and acquisition cable housing and electrode support；
Fig. 6 is the use schematic diagram of the utility model；
Fig. 7 is the signal transmission system block diagram of the utility model；
Fig. 8 is the signal gathering unit system block diagram of the utility model.
It is marked in figure：1. acquire cable housing, 2. non magnetic cables, 3. signal acquiring systems, 4. tantalum capacitances do not polarize electricity
Pole, 5. electrode supports, 6. seawater, 7. buoys, 8. pull-type current sources, 9. marine electromagnetic towing cable operation ships, 11. guide outside cables
Set, 12. signal cable housings, 41. contact conductors, 51. interconnecting pieces, 52. strengthening supports, 53. mounting holes, 54. second sealants, 71.
Buoy cable, 111. cable holes, 112. first sealants.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, to help the utility model is understood
Content.
Shown in Fig. 1-3, the utility model provides a kind of pull-type marine electromagnetic data acquisition cable, pull-type marine electromagnetic
Data acquire cable and are equipped with acquisition cable housing 1, and acquisition cable housing 1 is strip and the cavity of inner hollow.
It acquires cable housing 1 and is equipped with guiding cable housing 11 and signal cable housing 12, guiding cable housing 11 can be hemisphere or half
Ellipsoid, signal cable housing 12 can be the cylinder or ellipsoid of one end open.
12 inner cavity of signal cable housing is equipped with n electrode support 5, and n is positive integer, n >=2, electrode support 5 and acquisition cable housing
1 is used cooperatively, if guiding cable housing 11 uses semiellipsoid, signal cable housing 12 to use ellipsoid, then electrode support 5 is using ellipse
Torus structure；Guide cable housing 11 that hemisphere, signal cable housing 12 is used to use cylinder, then electrode support 5 uses annulus
Body structure.
The present embodiment guides cable housing 11 that hemisphere, signal cable housing 12 is used to use cylinder, and electrode support 5 is using circle
Ring body structurc.
Hemispheroidal diameter is equal with the diameter of cylinder, and hemispheroidal median plane is connected with one end that cylinder is open,
The one end of guiding cable housing 11 far from signal marge set 12 is equipped with the cable hole 111 communicated with cavity.
Electrode support 5 is equipped with interconnecting piece 51, and interconnecting piece 51 is torus, and the outside diameter of interconnecting piece 51 is less than or equal to signal
The interior circular diameter of cable housing 12, the outer circle of interconnecting piece 51 are used with the inner circle diametric fit of signal cable housing 12, interconnecting piece 51
Inner circle side wall is equipped with strengthening support 52, and strengthening support 52 is cruciform shape, and 52 center of strengthening support is equipped with mounting hole 53, strengthening support
4 ends are vertically connected with the inner circle side wall of interconnecting piece 51 respectively.
The interconnecting piece 51 of each electrode support 5 is equipped at least one inside and outside penetrating electrode to induction signal cable housing 12 and installs
Hole.
Electrode mounting hole can be annular groove, and electrode mounting hole, which is alternatively, multiple is located at signal cable housing 12 and phase in cavity
Logical hole.
Tantalum capacitance unpolarizable electrode 4, the outer circle side of tantalum capacitance unpolarizable electrode 4 and interconnecting piece 51 are equipped in electrode mounting hole
Wall is connected, and tantalum capacitance unpolarizable electrode 4 is located at by the second sealant 54 in electrode mounting hole.
As shown in figure 4, electrode mounting hole is the annular groove being located on signal cable housing 12, which acquires cable housing 1
Inner cavity is penetrating, and tantalum capacitance unpolarizable electrode 4 is circular ring shape, and tantalum capacitance unpolarizable electrode 4 is set in 51 outer circle of interconnecting piece, tantalum electricity
Hold unpolarizable electrode 4 sealing of tantalum capacitance unpolarizable electrode 4 is located in annular groove by the second sealant 54 and ensures to acquire cable
The leakproofness of 1 inner cavity of housing.
As shown in figure 5, electrode mounting hole be 4 rectangular openings being laid on signal cable housing 12, the rectangular opening with adopt
1 inner cavity of collection cable housing is penetrating, and tantalum capacitance electricity unpolarizable electrode 4 is sealed tantalum capacitance unpolarizable electrode 4 by the second sealant 54
It is located in rectangular opening and ensures to acquire the leakproofness of 1 inner cavity of cable housing.
4 outer surface of tantalum capacitance unpolarizable electrode is less than or equal at a distance from 12 center of signal cable housing outside signal cable housing 12
Wall is at a distance from 12 center of signal cable housing.
Preferably, 4 outer surface of tantalum capacitance unpolarizable electrode with the outer surface of 12 corresponding position of signal cable housing in same
Horizontal plane.
Non magnetic cable 2, cable and optical cable are equipped in cable hole 111, one end of non magnetic cable 2 passes through each strengthening support
Be connected with inner cavity of the signal cable housing 12 far from 111 one end of cable hole after the mounting hole 53 at 52 centers, non magnetic cable 2 it is another
One end is located at by cable hole 111 outside acquisition cable housing 1.
Non magnetic cable 2, cable and optical cable make 1 inner cavity of acquisition cable housing keep sealing by the first sealant 112.
First sealant 112 and the second sealant 54 are formed by glue sticking.
Signal gathering unit 3 is equipped between two electrode supports 5, signal gathering unit 3 is existed by band or cable bundle
On non magnetic cable 2, one end that cable is located at 1 inner cavity of acquisition cable housing is corresponding with acquisition system 3 connected.
Preferably, signal gathering unit 3 is located at center between two electrode supports 5.
The distance between two adjacent electrode holders 5 ranging from 10m-100m.
As shown in fig. 6, acquisition cable outer surface is laid with buoy 7, it is equipped with GPS timing locating modules in buoy 7, adjacent two
The distance between a buoy 7 ranging from 100m-500m, GPS timing locating module is equipped with antenna, and buoy 7 passes through buoy cable 71
It is connected with acquisition cable, the length of buoy cable 71 is the depth acquired in cable setting seawater 6.
Acquisition cable is connected by non magnetic cable 2 with marine electromagnetic towing cable operation ship 9,9 mistake of marine electromagnetic towing cable operation ship
Current source cable is equipped with pull-type current source 8.
The surface that tantalum capacitance unpolarizable electrode 4 is connected with electrode support 5 is equipped with contact conductor 41.
As shown in Figure 7 and Figure 8, marine electromagnetic towing cable operation ship 9 is equipped with control centre and control centre's opto-electronic conversion mould
Block, control centre's photoelectric conversion module are equipped with optical signal input and electrical signal.
Signal gathering unit 3 between two adjacent electrode holders 5 be equipped with electric field signal amplifier, analog-to-digital conversion module,
It three-component attitude transducer, three-component magnetic field sensor, salinity temperature, data memory module, data transmission module and adopts
Collect cable photoelectric conversion transmission module, acquisition cable photoelectric conversion transmission module be equipped with electric signal input end and light signal output end, two
Contact conductor 41 between a adjacent tantalum capacitance unpolarizable electrode 4 is connected with the input terminal of electric field signal amplifier, electric field letter
The signal output end point of number output end of amplifier, the signal output end of three-component attitude transducer and three-component magnetic field sensor
It is not corresponding with the input terminal of analog-to-digital conversion module to be connected, the signal output of the output end and salinity temperature of analog-to-digital conversion module
End is connected with the input terminal of data memory module respectively, the output end of data memory module and the input terminal phase of data transmission module
Even, the output end of data transmission module is connected with the electric signal input end of acquisition cable photoelectric conversion transmission module, acquires cable photoelectricity
The light signal output end of converting transmission module is corresponding with one end that optical cable is located in acquisition cable to be connected, and the one of the separate acquisition cable of optical cable
End is connected with the optical signal input of control centre's photoelectric conversion module, the electrical signal of control centre's photoelectric conversion module
It is connected with control centre computer by cable.
The signal end of GPS timing locating modules and the input terminal phase of the data memory module of immediate signal gathering unit
Even.
Preferably, analog-to-digital conversion module uses 32,9 channel analog-to-digital conversion module.
Tantalum capacitance unpolarizable electrode 4 will send analog-to-digital conversion to by electric field signal amplifier after electric field signal amplification filtering
Module, three-component attitude transducer and three-component magnetic field sensor send corresponding signal to analog-to-digital conversion module, and modulus turns
Mold changing block converts analog signals into digital signal and sends corresponding data memory module, GPS timings locating module and thermohaline to
Deep recorder sends corresponding digital electric signal to corresponding data memory module, and data memory module is by the number of storage inside
Word electric signal sends corresponding data transmission module to, and the data transmission module between two adjacent electrode holders 5 is by the number of reception
Word electric signal is transmitted to acquisition cable photoelectric conversion transmission module, the digital signal that acquisition cable photoelectric conversion transmission module will receive
It is converted to optical signal and control centre's photoelectric conversion module is sent to by optical cable, control centre's photoelectric conversion module will receive
Optical signal be converted to digital electric signal and be transmitted to control centre, control centre will store collected various signals and carry out
Processing analysis.
When marine electromagnetic data Collecting operation, marine electromagnetic towing cable operation ship 9 in water in tow pull-type current source 8 and this
The acquisition cable of utility model slowly moves ahead, and pull-type current source 8 is by two at a distance of hundreds of meters of remote current electrode (transmitting days
Line) the continual frequency domain or time-domain current signal for emitting low frequency into water, the current waveform of transmitting can be sine wave,
Square wave, the positive and negative square wave etc. that duty ratio is 1, pull-type current source 8 is into water while emission current under water, the utility model
Two tantalum capacitance unpolarizable electrodes 4 acquisition adjacent on cable is acquired along the controllable source electric field data in cable direction, three-component magnetic field passes
Sensor acquires controllable source three-component magnetic field data, the also synchronous acquisition of the salinity temperature and three-component attitude transducer in towing cable
The utility model acquires the thermohaline depth data and three-component attitude data of cable, and GPS timing locating modules pass through the utility model
Real-time time and position data are transmitted to control centre by acquisition cable, the processing of the pull-type marine electromagnetic data for the later stage
And integrated interpretation.
It is referred to it should be noted that middle word "front", "rear", "left", "right", the "up" and "down" used is described above
Direction in attached drawing, word "inner" and "outside" refer respectively to the direction towards or away from geometric center of specific component.
Only as described above, only specific embodiment of the utility model, when the utility model cannot be limited with this
The range of implementation, therefore the displacement of its equivalent assemblies, or according to equivalent variations made by the utility model patent protection domain and change,
It all should still belong to the scope that the utility model claims book is covered.
Claims (10)
1. a kind of pull-type marine electromagnetic data acquires cable, it is characterised in that：Including acquiring cable housing, the acquisition cable housing is
The cavity of strip and inner hollow, described cavity one end are equipped with the cable hole communicated with inside cavity, are set in the cable hole
There are non magnetic cable and cable, one end of the non magnetic cable is connected with inner cavity of the cavity far from cable hole one end, described non-
The other end of magnetic cable is located at containment portion by cable hole, and the inside cavity is laid with n electrode support, the n
For positive integer, the electrode support is connected with cavity inner wall, and each electrode support corresponds to acquisition cable housing position and is equipped at least one
A inside and outside penetrating electrode mounting hole is equipped with the tantalum capacitance being connected with counter electrode holder in the electrode mounting hole and does not polarize electricity
Pole is equipped with signal gathering unit in the cavity between two electrode supports, the signal gathering unit is connected with cable, described
It acquires cable housing and forms seal cavity with non magnetic cable, capacitance bracket and cable seal.
2. pull-type marine electromagnetic data according to claim 1 acquires cable, it is characterised in that：The electrode mounting hole is
One looping pit, the tantalum capacitance unpolarizable electrode are annular, and the inner circle of the tantalum capacitance unpolarizable electrode is set in corresponding
In electrode support outer circle.
3. pull-type marine electromagnetic data according to claim 1 acquires cable, it is characterised in that：The tantalum capacitance does not polarize
Electrode is rectangle, and the electrode mounting hole is 4 uniformly distributed rectangular openings, the tantalum capacitance unpolarizable electrode be located in rectangular opening and
It is connected with electrode support outer round surface.
4. pull-type marine electromagnetic data according to claim 1 acquires cable, it is characterised in that：The acquisition cable housing packet
Guiding cable housing and signal cable housing are included, the guiding cable housing is hemisphere, and the signal cable housing is cylinder, described half
The diameter of sphere is equal with the diameter of cylinder, and the hemispheroidal median plane is connected with cylindrical one end, the electrode branch
It is erected at signal cable jacket internal.
5. pull-type marine electromagnetic data acquires cable according to any one of claims 1-4, it is characterised in that：The tantalum
The surface that capacitance unpolarizable electrode is connected with electrode support is equipped with contact conductor, and the signal gathering unit is put equipped with electric field signal
Big device, analog-to-digital conversion module, three-component attitude transducer, three-component magnetic field sensor, salinity temperature, data memory module
And data transmission module, the input of contact conductor and electric field signal amplifier between two adjacent tantalum capacitance unpolarizable electrodes
End is connected, and the output end of the electric field signal amplifier, the signal output end of three-component attitude transducer and three-component magnetic field pass
The signal output end of sensor respectively it is corresponding with the input terminal of analog-to-digital conversion module be connected, the output end of the analog-to-digital conversion module and
The signal output end of salinity temperature is connected with the input terminal of data memory module respectively, the output of the data memory module
End is connected with the input terminal of data transmission module.
6. pull-type marine electromagnetic data according to claim 5 acquires cable, it is characterised in that：It is equipped in the cable hole
Optical cable, the signal gathering unit are additionally provided with acquisition cable photoelectric conversion transmission module, the acquisition cable photoelectric conversion transmission module
Equipped with electric signal input end and light signal output end, the electric signal input end and data of the acquisition cable photoelectric conversion transmission module
The input terminal of transmission module is connected, and the light signal output end of the acquisition cable photoelectric conversion transmission module is corresponding with optical cable to be connected.
7. pull-type marine electromagnetic data according to claim 6 acquires cable, it is characterised in that：The acquisition cable outer surface
It is laid with buoy, the distance between described buoy range 100m-500m, the buoy is interior to be equipped with GPS timing locating modules, institute
GPS timings locating module is stated by the way that cable is corresponding with the data memory module input terminal in acquisition cable to be connected.
8. pull-type marine electromagnetic data according to claim 5 acquires cable, it is characterised in that：The width of the electrode support
Degree is more than or equal to the width of tantalum capacitance unpolarizable electrode, tantalum capacitance unpolarizable electrode outer surface position corresponding with acquisition cable housing
The outer surface set is in same level.
9. pull-type marine electromagnetic data according to claim 8 acquires cable, it is characterised in that：On the inside of the electrode support
Strengthening support is equipped between wall, the strengthening support is cruciform shape, and the strengthening support center is equipped with mounting hole, the strengthening support
4 ends are connected with electrode support madial wall, and the non magnetic cable runs through after mounting hole with cavity far from cable hole one end
Inner cavity is connected, and the collecting unit is by band or cable bundle on non magnetic cable.
10. pull-type marine electromagnetic data according to claim 9 acquires cable, it is characterised in that：Two adjacent electrode branch
The distance between frame ranging from 10m-100m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820436992.6U CN208026881U (en) | 2018-03-29 | 2018-03-29 | A kind of pull-type marine electromagnetic data acquisition cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820436992.6U CN208026881U (en) | 2018-03-29 | 2018-03-29 | A kind of pull-type marine electromagnetic data acquisition cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208026881U true CN208026881U (en) | 2018-10-30 |
Family
ID=63908689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820436992.6U Expired - Fee Related CN208026881U (en) | 2018-03-29 | 2018-03-29 | A kind of pull-type marine electromagnetic data acquisition cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208026881U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108415091A (en) * | 2018-03-29 | 2018-08-17 | 山东蓝海可燃冰勘探开发研究院有限公司 | A kind of pull-type marine electromagnetic data acquisition cable |
-
2018
- 2018-03-29 CN CN201820436992.6U patent/CN208026881U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108415091A (en) * | 2018-03-29 | 2018-08-17 | 山东蓝海可燃冰勘探开发研究院有限公司 | A kind of pull-type marine electromagnetic data acquisition cable |
| CN108415091B (en) * | 2018-03-29 | 2024-04-05 | 山东蓝海可燃冰勘探开发研究院有限公司 | Towed marine electromagnetic data acquisition cable |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181030 |