21 results about "Kinetic Inhibitor" patented technology

The invention relates to the technical field of safe conveying of oil and gas pipelines, in particular to a polypeptide type hydrate kinetic inhibitor screening method based on molecular simulation, which comprises the following steps: selecting target protein related to hydrate growth, and designing a polypeptide sequence; performing polypeptide pre-screening; evaluating the binding affinity and binding mode of the polypeptide and the target protein; performing MD simulation on the screened high-affinity polypeptide; verifying the binding affinity of the polypeptide and the target protein; and collecting all experiment and simulation data for statistical analysis, and optimizing the polypeptide sequence. The structure and function of the target protein are systematically analyzed by using a bioinformatics database and tools, it is ensured that the selected target plays an important role in hydrate formation, and meanwhile, a polypeptide sequence designed based on the target protein structure can effectively improve the binding capacity; and in the pre-screening and docking analysis process of the polypeptide, dynamic parameters are simulated and extracted by molecular dynamics, so that the interaction between the polypeptide and the target protein can be deeply understood.

The present invention provides the use of ethylenediamine compounds as hydrate kinetic inhibitor synergistic agents and a hydrate kinetic inhibitor composition and its preparation method and application. The present invention uses ethylenediamine compounds as synergistic agents and hydrate kinetic inhibitors to obtain a composite system, which is used in oil and gas development or transportation processes, and can significantly inhibit the formation of hydrates, thereby solving the pipeline blockage problem caused by the formation of hydrates in oil and gas development and transportation processes.

The application discloses a visual hydrate inhibitor evaluation device and a use method, relates to the technical field of hydrate development evaluation, and comprises a kinetic inhibitor storage tank, a gas cylinder, a liquid storage tank, a thermodynamic inhibitor storage tank and at least one visual reaction kettle provided with a stirrer. The visual reaction kettle is connected with the kinetic inhibitor storage tank through a pipeline I. The visual reaction kettle is connected with the thermodynamic inhibitor storage tank through a pipeline II. Electromagnetic valves and flow meters are arranged on the pipeline I and the pipeline II. The visual reaction kettle is connected with the gas cylinder through a pipeline III. The visual reaction kettle is connected with the liquid storage tank through a pipeline IV. Stop valves and flow meters are arranged on the pipeline III and the pipeline IV. The visual reaction kettle is connected with a vacuum pump through a pipeline V. A stop valve is arranged on the pipeline V. Temperature sensors and pressure sensors are further arranged on the visual reaction kettle. The generation condition of hydrates under an experimental environment can be observed in real time. In combination with a temperature and pressure change range, inhibitor evaluation can be accurately completed.

The present application relates to natural gas hydrate inhibitor technical field, it is a kind of natural gas hydrate dynamics inhibitor containing polycyclic structure and its preparation method, the former raw material includes acryloyl morpholine, maleic anhydride, dimethylaminopropyl acrylamide, isohexyl glycol, initiator, chain transfer agent and chain terminator, obtain as follows: acryloyl morpholine, maleic anhydride and dimethylaminopropyl acrylamide are dissolved in isohexyl glycol solution, occur radical polymerization under the action of initiator, chain transfer agent and chain terminator and get it.In the natural gas injection and gathering and transportation process, add the natural gas hydrate dynamics inhibitor containing polycyclic structure of the present application, it can participate in hydrate crystal structure generation through the unique polycyclic ring, effectively inhibit the growth of hydrate crystal, prevent the generation of large particle hydrate, with the advantages of good inhibiting effect, less dosage, low comprehensive cost.

A method and system for solidifying and sealing carbon dioxide on the seabed. The method comprises: determining a storage target area on the seabed according to the emission point of carbon dioxide (CO2); designing an injection well according to the geological environment of the storage target area, the injection well extending into the interior of the storage target area and / or below the storage target area; injecting CO2 and additives into the storage target area through the injection well, the additives comprising a kinetic promoter, a thermodynamic promoter, a kinetic inhibitor and a thermodynamic inhibitor of CO2 hydrate; and CO2 forming CO2 hydrate in the storage target area to seal the CO2 in the storage target area. The method for solidifying and sealing CO2 on the seabed provided in the present application can achieve safe, stable, efficient, environmentally friendly and large-scale geological storage of CO2 by solidifying and sealing CO2 in the storage target area by forming hydrate into CO2.

The invention relates to a composite hydrate inhibitor for carbon sequestration, which comprises polyvinylpyrrolidone (PVP) serving as a kinetic inhibitor, tetrabutylammonium bromide (TBAB) serving as a thermodynamic accelerant and tetrahydrofuran (THF) serving as an organic solvent, and after the polyvinylpyrrolidone (PVP), the tetrabutylammonium bromide (TBAB) and the tetrahydrofuran (THF) are mixed with water, the concentrations of the PVP, the TBAB and the THF are respectively as follows: 0.001-1wt% of the PVP, 0-50wt% of the TBAB and 0-50wt% of the THF. The PVP, the TBAB and the THF are combined according to the proportion to form the composite hydrate inhibitor, and through the synergistic effect of the PVP, the TBAB and the THF, the generation speed of hydrates is increased, the carbon dioxide storage efficiency is improved, meanwhile, the aggregation degree of the hydrates can be reduced, and the blocking probability is reduced.

The present invention relates to a drilling fluid system for marine oil and gas drilling, a preparation method and application thereof, and belongs to the technical field of deepwater natural gas hydrate drilling. The drilling fluid system includes the following components: natural seawater, sodium chloride, potassium chloride, density regulator, fluid loss reducer, viscosity enhancer, reservoir bridge plugging agent, micro-nano plugging agent, anti-mud balling lubricant, hydrate kinetic inhibitor and hydrate decomposition inhibitor. According to the key technical problems of natural gas hydrate drilling and production in the South China Sea, the present invention optimizes the combination of viscosity enhancer, fluid loss reducer, lubricant and hydrate inhibitor, determines the various treatment agents required for the configuration of the drilling fluid system, and forms a drilling fluid system for marine oil and gas drilling with excellent rheological fluid loss performance, hydrate formation hydration expansion inhibition performance, plugging performance, lubrication performance and hydrate inhibition performance.

A microscopic and macroscopic evaluation method for a dual-effect hydrate inhibitor is provided. The method is applicable to the performance evaluation of traditional thermodynamic inhibitors and kinetic inhibitors. The present invention comprehensively evaluates the dual-effect hydrate inhibitor microscopically and macroscopically through a microscopic evaluation device and a macroscopic evaluation device, thereby more intuitively and efficiently screening out the dual-effect inhibitor with excellent performance. The present invention explains the action mechanism of the dual-effect inhibitor microscopically, accurately evaluate the effects of the inhibitor in two aspects of particle aggregation and particle adhesion, and provide a theoretical basis for screening the dual-effect inhibitor. Moreover, the present invention can verify the screened inhibitor macroscopically by using a flow evaluation device close to a field working condition to obtain the action effects of the dual-effect inhibitor under different production parameters, so that the comprehensive and multi-angle performance evaluation of the dual-effect inhibitor is achieved.

The invention discloses a method for evaluating the synergistic inhibition performance of a natural gas hydrate compound inhibitor with high CO2 content. The method comprises the following steps: S1, dissolving a kinetic inhibitor and a thermodynamic inhibitor in deionized water to form a homogeneous solution as a compound inhibitor; s2, testing inhibition performance; s3, observing the morphology of the hydrate crystal through a microscopic imaging technology, quantifying the growth rate and aggregation degree of the crystal in combination with an image processing algorithm, and verifying the adsorption configuration of the inhibitor and CO2 through molecular dynamics simulation; and S4, an early warning threshold value is set based on the supercooling degree threshold value and the particle size grading, an early warning signal is triggered, and the injection amount of the compound inhibitor is dynamically adjusted. According to the method, hydrate nucleation and growth are inhibited through the synergistic effect of the compound components, and quantitative analysis and early warning of the inhibition effect are achieved by combining microscopic imaging, molecular simulation and dynamic monitoring technologies.

The invention discloses a hydrate kinetic inhibitor as well as a preparation method and application thereof. The structural formula of the hydrate kinetic inhibitor is shown as a formula I. In the formula I, x: y is (1-9): 1. The preparation method of the hydrate kinetic inhibitor as shown in the formula I comprises the following steps: mixing N-vinyl caprolactam and vinyl isobutyl ether with a solvent, adding an initiator, carrying out binary copolymerization reaction, and then adding a terminating agent, so as to obtain the hydrate kinetic inhibitor as shown in the formula I. The hydrate kinetic inhibitor has excellent performance of inhibiting formation of hydrates, and can better solve the problem of pipe blockage caused by formation of hydrates in oil and gas development and transportation. # imgabs0 #

The invention discloses a bifunctional hydrate kinetic inhibitor with the average number-average molecular weight of 1000-10000 as shown in the formula I. The bifunctional hydrate kinetic inhibitor is an amphiphilic block copolymer, and compared with a common traditional inhibitor, the bifunctional hydrate kinetic inhibitor has the advantages of higher supercooling degree, better inhibition effect, smaller dosage and higher stability. The polymer has a general mass concentration of about 0.1-0.5 wt%, has anti-aggregation performance, can prevent aggregation of formed hydrates and reduce the risk of blockage, is suitable for an oil-gas-water three-phase or oil-water or gas-water two-phase coexistence system, is applied to inhibition of generation of hydrates in oil-gas exploitation, processing and transportation processes, and has a wide application prospect. # imgabs0 # R1 is (CH2) m1, m1 is an integer, and m1 is equal to 1 to 5; r2 is (CH2) m2, m2 is an integer, and m2 is equal to 1-4; m and n are integers, m is equal to 10-50, and n is equal to 10-200.

The invention discloses an effect evaluation device and method for a hydrate low-dose additive. The device is used for evaluating the effects of a hydrate kinetic inhibitor and a polymerization inhibitor at the same time, and comprises a reaction kettle which is transversely arranged and does periodic reciprocating rectilinear motion in the test process, a steel ball capable of freely moving is arranged in the reaction kettle, and a window for observing the hydrate generation process is arranged on the wall surface of the reaction kettle; the liquid inlet unit is connected with the reaction kettle and is used for providing an oil-water emulsion and a hydrate kinetic inhibitor and / or a polymerization inhibitor for the test; the control unit is used for controlling the liquid temperature and the gas pressure in the reaction kettle; and the data acquisition and processing unit is used for acquiring occurrence time data of the hydrate in the reaction kettle and movement retarding degree data of the steel ball in a certain temperature and pressure environment, and calculating safe operation time when the multiphase environment reaches the hydrate condition. According to the invention, the disturbance state in a field pipeline can be better simulated; and the effects of the hydrate kinetic inhibitor and the polymerization inhibitor can be effectively evaluated in the same test.

The invention discloses a high-CO2-content natural gas hydrate kinetic inhibitor as well as a synthesis method and application thereof, and aims to overcome the defects that a conventional kinetic inhibitor in the prior art is poor in inhibition effect and easy to lose efficacy in a high-CO2-content natural gas system. The high-CO2-content natural gas hydrate kinetic inhibitor comprises an inhibitor main agent, an inhibitor auxiliary agent and an inhibitor solvent according to the mass percent of (5-50%): (0-60%): (30-70%). The inhibitor main agent is a bipolymer obtained by carrying out free radical polymerization on acrylamide monomers and ethoxylated (methyl) acrylate. The invention also provides a synthesis method of the inhibitor and application of the inhibitor in deepwater shallow gas exploitation and high-pressure transportation. The inhibitor disclosed by the invention can effectively solve the problem that a conventional inhibitor is easy to lose efficacy in a natural gas system with high CO2 content, remarkably delays hydrate nucleation and inhibits crystal growth, is wide in applicable temperature and pressure range, safe and environment-friendly, and has a good industrial application prospect.

The present application relates to a kind of ultra-deep water gas hydrate kinetics inhibitor and preparation method and application, the hydrate inhibitor is by the copolymerization of first monomer and second monomer Binary copolymer or terpolymer;First monomer is 4-acryloyl morpholine, second monomer is at least one of N-vinyl pyrrolidone and N-vinyl caprolactam;4-acryloyl morpholine monomer is used in amount a, N-vinyl pyrrolidone monomer is used in amount b, N-vinyl caprolactam monomer is used in amount c, a:b:c=(20-60) %:(0-80) %:(0-80) %.The hydrate inhibitor of the present application can hinder the growth of hydrate, and the inhibitory effect is good, especially suitable for the environment under low temperature and high pressure;Preparation method is simple to operate, monomer is widely used, and the price is low, and the polymerization reaction condition is mild, and the yield is high.

The invention relates to the technical field of oil and gas pipeline flow guarantee, in particular to a spraying system for testing the growth microstructure of hydrates in inhibitor-containing liquid drops and application of the spraying system. The spraying system comprises a microsyringe, an automatic micromanipulator and a small sprinkling can; the small spray contains a solution containing 0.5 wt% of an inhibitor, and the small sprinkling can is used for spraying small liquid drops; the output end of the microsyringe is fixedly connected with a transparent adhesive tape, the lens adhesive tape and the automatic micromanipulator are each connected with a glass fiber, and dispersed small liquid drops are hung on the glass fibers connected with the transparent adhesive tape. The data acquisition system and the image processing system can visually observe the influence of the inhibitor on the dynamic growth morphology of the hydrate, so that the problem that the influence of the inhibitor in the oil phase on the generation of the hydrate in water drops is difficult to measure due to the fact that the hydrate kinetic inhibitor is insoluble in the oil phase is solved.

This invention discloses a throttling simulator. This invention belongs to the field of hydrate blockage prevention technology. The steps of using the chokehydcal.xlsx simulator in this invention are as follows: (1) Collect pressure data before and after throttling, temperature data before throttling, composition and production capacity of each phase, and throttling valve structure data; (2) Calculate the fluid hydrate formation temperature using empirical formulas; (3) Calculate the fluid throttling temperature drop using empirical formulas; (4) Determine the throttling fluid hydrate suppression temperature; (5) Calculate the fluid hydrate inhibitor dosage using empirical formulas; (6) Design a throttling scheme based on the minimum downstream temperature limit of the throttling valve and the inhibitor supply capacity limit; (7) Adjust the thermodynamic inhibitor dosage and kinetic inhibitor dosage according to the production situation.

The invention discloses a natural gas hydrate inhibitor for a high-sulfur-content gas well and a preparation method of the natural gas hydrate inhibitor. The natural gas hydrate inhibitor comprises the following components in parts by weight: 40-45 parts of a kinetic inhibitor, 1-3 parts of a synergist, 5-10 parts of polymeric alcohol, 10-20 parts of inorganic salt and 500-600 parts of water. According to the hydrate inhibitor, the kinetic inhibitor is used as a main material, after the kinetic inhibitor is compounded with the thermodynamic inhibitor, the polymeric alcohol and the synergist, the inhibition performance of the kinetic inhibitor is greatly improved, the kinetic hydrate inhibition effect can be remarkably improved, and the hydrate inhibitor is suitable for sulfur-containing natural gas with the H2S content being 5%-15%.

The invention discloses a visual hydrate inhibitor evaluation device and a use method, and relates to the technical field of hydrate development and evaluation.The visual hydrate inhibitor evaluation device comprises a kinetic inhibitor storage tank, a gas cylinder, a liquid storage tank, a thermodynamic inhibitor storage tank and at least one visual reaction kettle provided with a stirrer; the visual reaction kettle is connected with a kinetic inhibitor storage tank through a pipeline I; the visual reaction kettle is connected with a thermodynamic inhibitor storage tank through a pipeline II, the pipeline I and the pipeline II are respectively provided with an electromagnetic valve and a flowmeter, and the visual reaction kettle is connected with a gas cylinder through a pipeline III; the visual reaction kettle is connected with a liquid storage tank through a pipeline IV, the pipeline III and the pipeline IV are each provided with a stop valve and a flow meter, the visual reaction kettle is connected with a vacuum pump through a pipeline V, the pipeline V is provided with a stop valve, and the visual reaction kettle is further provided with a temperature sensor and a pressure sensor. The generation condition of hydrate in an experimental environment can be observed in real time, and inhibitor evaluation can be accurately completed by combining the temperature and pressure change range.

The present invention provides a hydrate kinetic inhibitor and a preparation method and application thereof. The hydrate kinetic inhibitor is obtained by binary copolymerization of N-vinyl caprolactam and vinyl n-butyl ether, and the preparation method thereof comprises the following steps: mixing N-vinyl caprolactam and vinyl n-butyl ether with a solvent, adding an initiator, performing binary copolymerization, and then adding a terminator to obtain the hydrate kinetic inhibitor. The hydrate kinetic inhibitor has excellent performance in inhibiting hydrate formation, and can better solve the problem of pipe blockage caused by hydrate formation in oil and gas development and transportation.

The invention relates to the technical field of natural gas hydrate inhibitors, in particular to a natural gas hydrate kinetic inhibitor containing a multi-ring structure and a preparation method of the natural gas hydrate kinetic inhibitor. The natural gas hydrate kinetic inhibitor comprises the following raw materials: acryloyl morpholine, maleic anhydride, dimethylamino propyl acrylamide, isohexylene glycol, an initiator, a chain transfer agent and a chain terminator. The preparation method comprises the following steps: dissolving acryloyl morpholine, maleic anhydride and dimethylamino propyl acrylamide in an isohexylene glycol solution, and carrying out free radical polymerization reaction under the action of an initiator, a chain transfer agent and a chain terminator. The natural gas hydrate kinetic inhibitor containing the multi-element ring structure is added in the natural gas injection-production and gathering and transportation process, can participate in generation of a hydrate crystal structure through a specific multi-element ring, effectively inhibits growth of hydrate crystals and prevents generation of large-particle hydrates, and has the advantages of being good in inhibition effect, small in dosage and low in comprehensive cost.

This invention discloses a bifunctional hydrate kinetic inhibitor of Formula I with an average number-average molecular weight of 1000-10000, its preparation method, and its application. The bifunctional hydrate kinetic inhibitor is an amphiphilic block copolymer, which, compared to conventional inhibitors, exhibits higher supercooling, better inhibition effect, and requires a smaller dosage (typically 0.1-0.5 wt%). It also possesses anti-agglomeration properties, preventing the aggregation of already formed hydrates and reducing the risk of blockage. It is suitable for three-phase systems (oil, gas, and water) or two-phase systems (oil-water or gas-water), and can be applied to inhibit hydrate formation during oil and gas extraction, processing, and transportation, showing broad application prospects. R1 is (CH2)m1, where m1 is an integer, m1 = 1-5; R2 is (CH2)m2, where m2 is an integer, m2 = 1-4; m and n are integers, m = 10-50, n = 10-200.