115 results about "Offshore water" patented technology

The invention relates to systems and methods for regulating algal biomass in offshore waters near an oil and gas production platform. The systems of the invention encompasses a plurality of modules for managing nutrients, algae, and aquaculture, including enclosures for containing aquatic organisms, and various operating subsystems that are operably associated with surface and underwater structures of the platform. In one embodiment of the invention, aquatic organisms are cultured in eutrophic water to feed on algae, thereby reducing the algal biomass. In other embodiments, the diversity of algae in an algal bloom is modified and the productivity of oligotrophic water is increased.

The invention discloses an offshore area water environment evaluation and emergency early warning system. The system includes a GIS (Graphic Information System) water environment evaluation and management platform and a display terminal. The GIS water environment evaluation and management platform is equipped with a database including space data and attribute data. The GIS water environment evaluation and management platform also includes a database management module, a water environment module, an emergency early warning module, an information inquiry module and a comprehensive output module. Therefore, the system provided by the invention is an overall guarantee management system concerning aspects ranging from data management, water pollution evaluation, pollution accident prediction and emergency contingency plan generation. A powerful graph display function of a GIS is combined, so that direct display of offshore area pollution information is realized, so that convenience is made for a monitor to identify the water environment pollution areas and the pollution levels and for a decision maker to make accurate judgment and take timely and effective measures when accidents occur. Therefore, comprehensive management of the offshore water environment is enhanced.

The invention relates to a verification method for silt coast wave-induced current numerical simulation, and belongs to the technical field of offshore water dynamic simulation and verification. The verification method for silt coast wave-induced current numerical simulation comprises the following steps of respectively building a Deflt3D wave-induced current calculation model and an ROMS wave-induced current calculation model; respectively calibrating and verifying the applicability of the Deflt3D wave-induced current calculation model and the applicability of the ROMS wave-induced current calculation model; comparing and analyzing commonness and differences of simulations results of the Deflt3D wave-induced current calculation model and the ROMS wave-induced current calculation model, and utilizing a comparison method for verifying calculated results of the models. The verification method has the advantages that on the current condition that silt coast wave-induced current lacks measured data and cannot verify the models, the model comparison verification method is provided, the method is reasonable and feasible, and the defect of lack of measured data of the silt coast wave-induced current can be overcome.

The invention relates to an isotope-based analysis method for nitrogen pollutants in an offshore aquaculture water area. The contribution rate of aquaculture wastewater to nitrogen in offshore water is acquired in the manner of analyzing the abundance values of nitrogen isotopes in the offshore water and the aquaculture wastewater according to the different components of the nitrogen isotopes in different pollution sources and receiving water. The method specifically comprises the following steps: step 1, collecting samples on all the sampling sites before the flood tide according to nationalrelevant industrial standards; and step 2, adopting an isotope mass spectrometer for analyzing the abundance values of nitrogen, hydrogen and oxygen isotopes in all the samples, comparing with the abundance values of the isotopes of a standard sample, calculating an isotope rate value of the samples, accordingly calculating the abundance values of 2H-H20, 18O-H2O and 15N-NO3 in an effluent sample,an aquaculture wastewater sample and a tidal creek sample, and applying a bayesian network model for calculating the contribution rate of the pollution sources. Due to the use of the isotopes in theinvention, the accuracy of analysis result is increased, the monitoring workload is effectively reduced and the human and material resources are saved.

The invention provides a preparation method of an amphoteric ion type Gemini viscoelastic surfactant and a formula of a high salinity water-based cleaning fracturing fluid with the amphoteric ion typeGemini viscoelastic surfactant as a thickening agent, wherein the high salinity water-based cleaning fracturing fluid comprises a salt-resistant Gemini viscoelastic surfactant 2-5 wt%, inorganic salt3-20 wt% and that balance of water, namely the cleaning fracturing fluid prepared from offshore water or stratum produced water with the salinity of 30,000-200 000 mg/L. This type of viscoelastic surfactant can be directly formulated with marine water or stratum produced water, and the prepared fracturing fluid has good temperature resistance and shear resistance, at the shearing condition of 140DEG C, 170 s<-1>, the viscosity remains above 40 mPa.s after 2 hours.

An offshore structure comprises a hull having a longitudinal axis, a first end, and a second end opposite the first end. In addition, the structure comprises an anchor coupled to the lower end of the hull and configured to secure the hull to the sea floor. The anchor has an aspect ratio less than 3:1. The hull includes a variable ballast chamber positioned axially between the first end and the second end of the hull and a first buoyant chamber positioned between the variable ballast chamber and the first end of the hull. The first buoyant chamber is filled with a gas and sealed from the surrounding environment. Further, the structure comprises a ballast control conduit in fluid communication with the variable ballast chamber and configured to supply a gas to the variable ballast chamber. The structure also comprises a topside mounted to the first end of the hull.

The invention relates to the technical field of satellite communication, in particular to a marine target positioning method, a help seeking terminal and a search and rescue terminal and system. The method includes: the help seeking terminal disposed on a target acquires the location information of the target through a Beidou satellite positioning system; the help seeking terminal transmits the location information to the search and rescue terminal to allow the search and rescue terminal to analyze the location information so as to the location of the marine target and display the location on an electronic sea map. By the marine target positioning method, the help seeking terminal and the search and rescue terminal and system, information basis is provided for fast search and rescue, defects of rescuing systems such as mobile wireless positioning systems for people falling into offshore water in the prior art are overcome, positioning accuracy of the targets falling into water is increased, limitation by offshore distance is avoided, reliable basis is provided for search and rescue of the targets falling into water, rescuing time can be effectively shortened, and rescuing efficiency is increased.

The invention relates to an offshore water chlorophyll a concentration remote sensing inversion method based on an improved random forest. remotely sensing image data by utilizing a time sequence; combining timing buoy observations, The method comprises the following steps of: establishing an intelligent remote sensing inversion model to carry out remote sensing inversion on the chlorophyll a concentration of an offshore water area by taking time continuous space sparse compensation as a modeling strategy and adopting an improved random forest-double-weight random forest method to obtain a very good inversion result, and visually and accurately displaying the spatial distribution of the chlorophyll a concentration of the offshore large range. The invention can provide a macroscopic, continuous and effective method for monitoring the concentration of chlorophyll a in the near-shore water body, can make up the deficiency of the traditional chlorophyll a concentration monitoring, and hashigher practical value.

The invention discloses an integral double-hull floating platform device for an offshore water-floating type photovoltaic power station. The integral double-hull floating platform device comprises a plurality of floating bodies (1) employing a modulation design, wherein the plurality of floating bodies (1) are connected to form a sheet. The integral double-hull floating platform device is characterized in that each floating body (1) comprises a floating platform (2) and a rear component support slope (3), wherein each floating platform (2) is horizontally arranged at the front part; a hollow cavity (2.1) is formed between each floating platform (2) and the corresponding rear component support slope (3); each component support slope (3) comprises two parallel hulls (3.1); and a U-shaped connecting body (3.2) is arranged at one transverse side of the two hulls (3.1). According to the integral double-hull floating platform device, the defects that the device in the prior art is adverse to modular construction of a water photovoltaic power station and does not have the feasibility for lake surfaces, reservoirs and the like with relatively large water level change are overcome; application in water areas with different latitudes and different types can be realized; and the scale effect can be realized.

The invention belongs to disaster prevention and mitigation strategies in the field of water ecological safety, and further relates to the fields of control and treatment of red tide in offshore water areas, and specifically to modified clay capable of eliminating the red tide with high efficiency. The modified clay is a compound material prepared from inorganic aluminum salt, clay mineral and an oxidant in a ratio of 500: 0-1: 1-50 by weight. When in use, the modified clay is uniformly mixed with seawater into a uniform suspension which is sprayed on the surface of the red tide water according to a certain concentration, so the effect of rapid elimination of a large number of red tide organisms in water is achieved. The modified clay can solve the problems of harsh application conditions and difficult highly-efficient large-scale application of common PAC modified clay in treatment of the red tide.

The invention discloses a large cross section submarine optical cable. The large cross section submarine optical cable comprises an optical cable core and an optical cable outer jacket, wherein the core comprises a stainless steel light unit, an inner armored steel wire, a copper pipe, a copper wire, a water blocking material and shielding layer and an insulation sheath, the inner armored steel wire is twisted on the stainless steel light unit and is then wrapped in the copper pipe, the copper wire is externally twisted the copper pipe, the copper wire is wrapped in the water blocking material and shielding layer, the water blocking material and shielding layer is externally wrapped in the insulation sheath, the outer jacket sequentially comprises an outer armored steel wire, asphalt and a polypropylene rope from inside to outside, the outer armored steel wire is twisted on the insulation sheath, the outer armored steel wire is wrapped in the polypropylene rope, and the asphalt is filled between the insulation sheath and the polypropylene rope. The optical cable is advantaged in that the structure is reasonable, corrosion of the steel wire can be effectively prevented, service life in sea water can be prolonged, integrity, mechanical performance and physical performance of the cable are effectively protected, damage caused by boat anchor dragging and offshore waters excavation can be prevented, the polypropylene rope has strong environment adaptability, and service life of the cable used in the sea water can be guaranteed.

The invention provides a multi-point sampling device for the offshore water quality and sediment. The multi-point sampling device comprises a support assembly. A water sampling assembly and a sedimentsampling assembly are arranged on the support assembly circumferentially. The support assembly includes an upper support plate, a lower support plate and a main support frame that are integrated intoone; the upper support plate is horizontally disposed above the lower support plate; and the main support frame is vertically fixed between the upper support plate and the lower support plate. The water sampling assembly includes a plurality of sampling tubes; the tops of the sampling tubes folded outwardly to form a horizontally arranged sampling inlet that is arranged outwardly; and a plug assembly is arranged at the sampling inlet. In addition, the sediment sampling assembly includes a sampling assembly shell based on a positive quadrangular prism structure; and a sampling cavity with an open bottom is formed in the sampling assembly shell. Therefore, water different depths as well as sediments on the seabed can be sampled; and device having advantages of diversified functions and great convenience in operation is capable of carrying out sampling effectively and rapidly.

The invention discloses a method for monitoring polycyclic aromatic hydrocarbons (PAHs) in surface seawater by means of remote sensing. According to the method, the large-area distribution of the remote sensing inversion concentration of the dissolved PAHs in the surface water of estuaries and bays is obtained by establishing a content algorithm model for quantitatively expressing the dissolved PAHs of the ocean by using water color parameters such as chromophoric dissolved organic matter (CDOM) concentration of the estuaries and the bays, and applying the content algorithm model to images of a geostationary ocean color imager (GOCI) of a first geostationary meteorological satellite sensor on the world. After the method is adopted, the contamination status of the PAHs in offshore waters can be monitored by means of remote sensing; the method is mainly used for monitoring the distribution characteristics of marine pollutants in ways of large area and high frequency. The remote sensing-based monitoring model for monitoring the distribution situation of the PAHs in the surface water of estuaries and the bay is proposed based on analysis of measured data and is applied to satellite data of the GOCI, and remote sensing monitoring of the PAHs concentration is realized in virtue of the remote component CDOM in the seawater.

The invention relates to a solid-liquid pollutant integrated cleaning device for offshore waters and a cleaning method thereof. The device comprises a ship body and a solid-liquid pollutant integratedcleaning system. The ship body is of a double ship structure. The solid-liquid pollutant integrated cleaning system comprises floating garbage collecting devices and a sewage cleaning device. The floating garbage collecting devices are symmetrically arranged on hoses on two sides of the ship body and each floating garbage collecting device comprises a barrel shell and a recovery basket mounted inthe barrel shell, and the lower end of the barrel shell communicates to the hose; the sewage cleaning device comprises a sewage collecting box, a sewage reaction box, a CCAS reaction box, a water quality detection box and a sewage collecting box which are connected successively, the sewage collecting box communicates to the hose, water filtered by the floating garbage collecting devices enter thesewage collecting box through the hoses, active sludge is contained in the sewage reaction box, an MBR membrane bioreactor is arranged in the CCAS reaction box, and a water quality detection device is arranged in the water quality detection box. By adopting a negative pressure principle and a CCAS process, the solid-liquid pollutant integrated cleaning device can clean solid and liquid pollutantseffectively, so that solids and liquids are integrally treated.

The invention belongs to the technical field of construction engineering and discloses an artificial fish reef stereo layout based storm-proof sea fishing platform and a construction method. The method includes platform site selection, platform underwater piling, platform core area bottom sediment modification, sea fishing above-water platform pouring, cage culture area construction, buoyant raft aquaculture area construction and large fish shelter area construction. The storm-proof sea fishing platform comprises a sea fishing platform main area, a cage culture area, a buoyant raft aquaculture area, a large fish shelter area, an intertidal belt buffering area and a supratidal land area. On the basis of improvement of an original platform, stereo wave eliminating and intercepting facilities with fish reefs serving as main components are introduced; by a streamline design, a framework type ventilating structure, high-strength stainless steel supporting frames, a concrete foundation and pile faces, a steady state is formed, and the platform under influences of violent typhoons can be separated from piles and hauled to a harbor or land. The artificial fish reef stereo layout based storm-proof sea fishing platform is suitable for various types of sea areas being 30m or below in offshore water depth in China.

The invention belongs to the technical field of oil exploration, development and augmented injection, and particularly relates to a micro-fracturing augmented injection process method suitable for a water injection well of an offshore oil field. The micro-fracturing augmented injection process method comprises the following steps: S1, based on the limit displacement, a procedure for testing a pre-pressure water absorption index is established, the pre-pressure water absorption index of the water injection well is calculated, and a pre-pressure water absorption indicative curve of the water injection well is drawn; S2, according to the water absorption index and the limit displacement, fracturing working fluid is injected into a target formation through a step-type progressive increase pump, and a fracturing construction curve graph is drawn; S3, according to the fracturing construction curve graph, micro-fracturing breaking points are judged, and after the breaking points occur, the pump is stopped; and S4, a post-pressure water absorption index of the water injection well is tested, and a post-pressure water absorption indicative curve of the water injection well is drawn and compared with the pre-pressure water absorption indicative curve of the water injection well to evaluate the micro-fracturing effect of the water injection well. The micro-fracturing augmented injection process method has the beneficial effects that the material cost of acidification deblocking and the cost of fresh water transportation are saved, important significance for low-cost efficient augmented injection of the offshore water well is achieved, and the effect of relieving a near-well damage belt is obvious.

The invention discloses a comprehensive treatment device and method for blue-green algae in an offshore water body, and relates to the technical field of blue-green alga treatment devices and methods.The invention aims at solving the problems that the existing treatment method and device both have the defects of treating symptoms but not root causes and cannot effectively inhibit blue-green algaein a natural water body in the early stage. A salvage ship and an automatic blue-green alga collecting mechanism are arranged on the river; the salvage ship is positioned on one side of the blue-green alga automatic collecting mechanism; a pressurizing mechanism is arranged on one side of the river; the pressurizing mechanism comprises an alga removal trap pool and an alga removal trap; the algaremoval trap is located in the alga removal trap pool; an air floatation tank is arranged on one side of the pressurizing mechanism; a centrifugal dehydration mechanism is arranged on one side of theair floatation tank; a sedimentation tank and a purification wetland are arranged on one side of the pressurizing mechanism, one side of the air floatation tank and one side of the centrifugal dehydration mechanism; and the sedimentation tank is located on one side of the purification wetland.

The invention discloses a closing-opening molecular fluorescent probe of chalcone linked to a 2, 4-dinitrophenyl group. The closing-opening molecular fluorescent probe is used for detection of toxic thiophenol in the offshore waters. The closing-opening molecular fluorescent probe has no fluorescence. Thiophenol improves the fluorescence and strong yellow-green fluorescence is produced. Through use of thiophenol in the probe molecule probe-KCN1 solution, the fluorescence intensity is increased by 40 times. When the thiophenol has a concentration of 0-10 micromoles per liter, the fluorescence intensity of the probe-KCN1 detection system shows a good linear relationship with the concentration of thiophenol. The closing-opening molecular fluorescent probe can be used for detecting a thiophenol compound at a low concentration in the seawater sample and has a practical application value.

The invention discloses an offshore buoyant raft culture area extraction method based on SAR and optical image fusion. An optical image and SAR image fusion mode is adopted to extract a marine culturearea, a fusion algorithm most suitable for marine culture area extraction is obtained through experiments, and the precision of offshore water area buoyant raft culture area extraction is effectivelyimproved. According to the experimental result, the marine buoyant raft culture range can be accurately defined; the method is beneficial for government departments to more effectively supervise offshore culture areas, standardize the culture density of the culture areas, purify the culture water area environment, relieve the contradiction between the increase of transport ships and the continuous expansion of the culture water area, prevent commercial ships from entering the culture areas by mistake to pollute the culture water area, and ensure the sailing safety of the ships.

The invention discloses a continuous monitoring method for a water quality survey in an offshore environment. According to the method, a water quality monitoring instrument arranged in a sea area is used for monitoring multiple parameters in a water body, the parameters are transmitted to a data receiving device on land in a wireless transmission mode, the data receiving device records and stores data, and the water quality monitoring instrument supplies energy required for work through a self power supply component and/or a solar power supply device. According to the method, solar energy and/or the power supply device arranged in the water quality monitoring instrument is utilized for supplying power, continuous monitoring around the clock can be carried out, and the data is transmitted into the data receiving device on land by means of the wireless data transmission function of the water quality monitoring instrument to be automatically recorded and stored, so that the purpose of continuous monitoring is achieved without manual operation, and detection efficiency is greatly improved. The method can be applied to continuous monitoring of offshore water quality.