34 results about "Polyamine Inhibitor" patented technology

The invention discloses a strong-inhibition water-base drilling fluid which comprises the following components in parts by mass: 100 parts of water, 0.2-4 parts of polyamine inhibitor, 0.1-1 part of coating inhibitor, 10-25 parts of hydrate inhibitor, 0.1-1 part of tackifier, 0.5-5 parts of fluid loss agent and 0.5-3 parts of liquid lubricant. The polyamine inhibitor is an amino polymer polymerized from polyether diamine and epoxy alkane; and the mol ratio of the polyether diamine to the epoxy alkane is 1-10:1-20. The drilling fluid disclosed by the invention can effectively inhibit wellbore instability of deepwater shallow strata, and has equivalent inhibition capability to an oil-base drilling fluid. The drilling fluid disclosed by the invention can solve the problem of generation of hydrate in deepwater drilling, and is applicable to 3000m-deep drilling operation. The drilling fluid disclosed by the invention has favorable low temperature-high temperature stability, and is applicable to a deepwater large-temperature-difference environment (2-150 DEG C).

The invention relates to a drilling fluid used for active mud shale drilling, and the drilling fluid is used in oilfield drilling. The drilling fluid comprises the following components in percentages by weight: 2-6% of bentonite, 0.2-0.5% of coated inhibitor, 0.2-1.0% of flow pattern regulator, 0.2-0.5% of high-temperature-resistant polymer filtrate reducer, 4-7% of potassium chloride, 1-3% of polymeric alcohol, 0.5-1.0% of polyamine inhibitor, 0.5-1.0% of anti-balling fast drilling agent and 45-85% of water. The drilling fluid has the inhibition property and lubricating property approximate to that of an oil-based drilling fluid, solves the problems that the mud making of the mud shale is severe, mud escapes from a vibrating screen, the viscous shearing of the drilling fluid increases and the rheological properties of the drilling fluid deteriorates during strong-mud-making active mud shale drilling, prevents destabilization of the active mud shale, dispersion of drill cuttings, balling of drill bit, and adhesion and coalescence of the mud shale, and increases the drilling speed of the active mud shale.

The invention discloses a drilling fluid prepared from the following components in percentage by mass: 3.2-3.5% of bentonite, 0.1-0.2% of Na2CO3, 0.3-0.5% of polymer encapsulating/inhibiting agent, 0.5% of polyamine inhibitor, 1.0-1.5% of compound ammonium salt, 3.0-3.5% of high-temperature-resistant filtrate loss reducer, 2.5-3.0% of salt-resistant filtrate loss reducer, 0.8-1.2% of mud cake quality improver, 4.0-5.0% of modified asphalt, 2.5-3.0% of efficient anti-sloughing agent, 3.0-3.5% of anti-sloughing lubricant, 0.3% of film forming and wall fixing agent, 2.0-2.5% of extreme pressure fluid lubricant, 0.2-0.3% of flow pattern regulator, 8.0-10.0% of KCl, 0.2-0.3% of NaOH and the balance of water. The invention also provides a preparation method of the drilling fluid. The drilling fluid has favorable anti-sloughing, lubricating, anti-blocking and wellbore cleaning abilities.

The invention relates to a polyamine inhibitor for drilling fluids and a method for preparing the polyamine inhibitor. The method comprises the steps as follows: an initiator and an acid-binding agent are placed in a reactor, under the normal pressure and the nitrogen protection, a sulfonylation agent is dripped into the reactor to conduct the sulfonylation reaction, the sulfonylation reaction is 10 to 12 hours, the sulfonylation temperature is 0 to 30 DEG C, reactants are filtered, filtrate is dissolved in the water, the lower-layer fluid is taken down after static split phase of the filtrate, water is removed through reduced pressure distillation, and end sulfo-group esters are obtained; the end sulfo-group esters are dripped into a reaction kettle filled with aminating agents and precipitating agents to conduct the amination, the reaction time is 2 to 3 hours, the amination temperature is 70 to 90 DEG C, products are filtered, solvents are removed through reduced pressure distillation, and the polyamine inhibitor is obtained; and the additive is suitable for various water-based drilling fluids, can control hydration and dispersion of clay shale well, effectively solves the problems that the drilling fluid is thickened and degraded in performance since the clay shale is hydrated and dispersed, and provides a certain guarantee for safely and efficiently drilling.

The invention provides environment-friendly type high-performance water-based drilling fluid and a preparation method thereof and belongs to the field of drilling fluid. The environment-friendly typehigh-performance water-based drilling fluid is mainly prepared from water and components based on the mass fraction of the water: 0 to 2 percent of bentonite slurry, 2 to 4 percent of a polyamine inhibitor, 12 to 17 percent of composite formate, 0.5 to 0.8 percent of a polymer strong coating agent, 1 to 2 percent of a polymer filtrate loss reducer, 0.5 to 0.8 percent of compound ammonium salt, 0.5to 0.8 percent of technical-grade low-viscosity carboxymethyl cellulose, 2 to 3 percent of low-fluorescence white asphalt, 0.3 to 0.5 percent of a biological polymer, 4 to 6 percent of a vegetable oil lubricant, 2 to 4 percent of light calcium carbonate, 1 to 2 percent of heavy calcium carbonate, 0.5 to 0.7 percent of potassium hydroxide and 50 to 120 percent of barite powder. The invention provides the environment-friendly type high-performance water-based drilling fluid which has an inhibitive property and a lubrication property comparable to oil-based drilling fluid, acceptable cost and high environmental friendliness, and can meet safe and rapid drilling requirements of a high-difficulty complex well as well as a large-displacement directional well and horizontal well, and the preparation method of the environment-friendly type high-performance water-based drilling fluid.

The invention discloses a water-based nano drilling fluid, which comprises the following components dispersed in water: basic mud, a polyamine inhibitor accounting for 0.5%-3% of the volume of the drilling fluid, a plugging agent accounting for 0.5%-2% of the mass of the drilling fluid, a deformable blocking polymer accounting for 0.5%-3% of the mass of the drilling fluid, and a lubricant accounting for 0.5%-2% of the volume of the drilling fluid, wherein the basic mud comprises the following components: bentonite accounting for 1.5-4% of the mass of the drilling fluid, sodium carbonate accounting for 0.1-0.3% of the mass of the drilling fluid, sodium hydroxide accounting for 0.1-0.3% of the mass of the drilling fluid, low-viscosity polyanionic cellulose accounting for 0.8-2% of the mass of the drilling fluid, biopolymer xanthan gum accounting for 0.1-0.3% of the mass of the drilling fluid, partially hydrolyzed polyacrylamide accounting for 0.1-0.3% of the mass of the drilling fluid, and barite used for adjusting the specific gravity of the drilling fluid.

Belonging to the technical field of preparation methods for petroleum drilling oilfield chemistry macromolecular polymers, the invention discloses a polymer inhibitor for clay phase-free drilling fluid and a preparation method thereof. The polymer inhibitor is formed by copolymerization of an organic amide monomer A, an amido hydrolysis inhibiting monomer B and a cationic monomer C according to a mass percentage of (56-76):(10-25):(14-19) under the action of an initiator and a pH value regulator. The intrinsic viscosity number of the polymer inhibitor is 2.0-3.0dl/g. The shale with a clear water recovery rate of 3.6% is employed to perform shale recovery experiment on the obtained product. A 0.5% aqueous solution of the polymer inhibitor can reach a primary shale recovery rate of higher than 90% after 16h at 200DEG C and a relative shale recovery rate of higher than 98%, and a contrast example, i.e. a 2% high temperature resistant polyamine inhibitor solution only has a primary shale recovery rate of 64.2% after 16h at 200DEG C. With good sloughing inhibiting and preventing ability under high temperature conditions, the polymer inhibitor provided by the invention can be used for weak gel clay phase-free drilling fluid to effectively inhibit hydration expansion of mud shale and ensure safe and fast drilling of a special process well, thus further improving the wellbore wall stabilization capacity.

The invention provides an anti-collapse drilling fluid used for a coal seam and capable of drilling a coal-bearing stratum, and a preparation method thereof. The anti-collapse drilling fluid comprises100 parts of water, 1.0-6 parts of bentonite, 0.1-0.3 part of sodium carbonate, 0.25-7.5 parts of a filtrate reducer, 0.5-3 parts of a polyamine inhibitor, 2-8 parts of a sulfonated material, 1-5 parts of an asphalt material, 1-4 parts of a plugging agent, 1-6 parts of a lubricant and 0.5-5 parts of a shielding temporary plugging agent, wherein the pH value of the anti-collapse drilling fluid is9-10, and the density of the anti-collapse drilling fluid is 1.10-2.00 g/cm<3>. The drilling fluid has the characteristics of good rheological property, good lubricating property, strong inhibiting and plugging capability, wide density application range and the like, meets the requirements of well wall collapse prevention in stratum drilling such as crack development within 180 DEG C, low strengthand the like, and is particularly suitable for drilling collapse prevention of coal-mudstone interaction stratums.

The invention relates to a water-based drilling fluid for shale gas wells and a production method thereof. The method sequentially includes the following steps of: (1) preparing the following raw materials: 1000 parts of water, 45-50 parts of sodium bentonite, 500 parts of a water-soluble inhibition weighting agent II; 100 parts of a water-soluble inhibition weighting agent III; 15-20 parts of aninhibiting and anti-collapse agent non-fluorescence white asphalt, 10-20 parts of solid polymeric alcohol, 10-20 parts of a filtrate reducer, 0.5-1 part of a polyamine inhibitor, 20-30 parts of ultrafine calcium carbonate, 10-25 parts of an extreme pressure lubricant, and 0.5-1 part of a coating inhibitor; (2) mixing the sodium bentonite and water, and performing curing for at least 24h at normaltemperature; and (3) adding the water-soluble inhibition weighting agent II and water-soluble inhibition weighting agent III under stirring, then adding the inhibiting and anti-collapse agent non-fluorescence white asphalt and the solid polymeric alcohol, then adding the filtrate reducer and the polyamine inhibitor, then adding the ultrafine calcium carbonate and the extreme pressure lubricant, finally adding the coating inhibitor, and then adjusting the pH value and density. The drilling fluid has the advantages of high plugging properties, strong inhibition and excellent lubricating properties, and can meet the safe drilling requirements of shale gas horizontal wells.

The invention discloses a polyamine inhibitor for water-based drilling fluid and a method for preparing the polyamine inhibitor. A structural formula of the polyamine inhibitor is shown, wherein an n can be 0 or 1 or 2 or 3; an m ranges from 100 to 200; an R<1> is -CH<3> or -CH<2>CH<3> or -CH<2>CH<2>OH. The method for preparing the polyamine inhibitor for the water-based drilling fluid includes mixing polyamine organic compounds and water with one another to obtain mixtures; slowly adding epichlorohydrin into the mixtures; enabling the epichlorohydrin and the mixtures to react with one another; adding chain growth terminators into the mixtures; cooling products until the temperatures of the products reach the room temperature after reaction is completed so as to obtain the polyamine inhibitor for the water-based drilling fluid. The polyamine inhibitor for the water-based drilling fluid and the method have the advantages that the polyamine inhibitor is excellent in shale inhibition and can be normally used under the condition of temperature of 180 DEG C; the method is simple and is easy to implement.

The invention relates to a site treatment technique for environment-friendly polyether alcohol amine drilling fluid and belongs to the field of exploitation of oil and gas fields. The site treatment technique for the environment-friendly polyether alcohol amine drilling fluid comprises the stage of mixing and converting, the stage of performance maintenance and the stage of well completion preparation. According to the stage of mixing and converting, drilling is conducted to a deep shale well section, the content of bentonite in original well slurry is reduced to be 20-30 g/l, formate and a tackifier are added into the well slurry till the mass content of the formate reaches 3% and the mass content of the tackifier reaches 0.2%, 400-500 kg of polyether polyols is supplemented into the drilling fluid each circulation cycle to guarantee that the mass content of the polyether polyols in the drilling fluid is 1.5%-2.0%, a capsulating agent, a polyamine inhibitor, a filtrate reducer and an anti-collapse agent are then sequentially added till the mass content of the capsulating agent in the drilling fluid reaches 0.2%-0.3%, the mass content of the polyamine inhibitor in the drilling fluid reaches 0.2%, the mass content of the filtrate reducer in the drilling fluid reaches 2% and the mass content of the anti-collapse agent in the drilling fluid reaches 1.5%, and are full circulated, the PH value of the mixture is regulated to 8-9 with caustic soda after system conversion is completed, and then the drilling fluid is thickened to the required density. The site treatment technique can be applied to drilling processes in different strata to achieve effective lubricating, prevent drilling tools from getting stuck and stabilize well walls.

The invention discloses a polyamine inhibitor for a water-based drilling fluid and a preparation method of the polyamine inhibitor. The structural formula of the polyamine inhibitor is as shown in thespecification. The preparation method includes the steps of firstly, weighing, by weight, 75-80 parts of maleic anhydride, 210-215 parts of triethanolamine, 8-12 parts of glacial acetic acid and 348-352 parts of tap water; secondly, placing the weighed maleic anhydride and triethanolamine in a reaction kettle under normal temperature; thirdly, rising the temperature in the reaction kettle to 80-90 DEG C in 4 minutes, and keeping the temperature for 30 minutes; fourthly, rising the temperature to 180 DEG C after the heat preservation, and using a vacuum pump to keep pressure in the reaction kettle in a 20mm mercury column state to perform reaction for 4 hours; fifthly, after the reaction, cooling and performing pressure relief, and cooling to 90 DEG C; sixthly, adding the glacial acetic acid and the tap water when required temperature is reached, and performing reaction for 2 hours to obtain the polyamine inhibitor. The polyamine inhibitor is applicable to a shale gas water-based drilling fluid system.

The invention relates to an extreme pressure antifriction type drilling fluid used for oil and gas field mining. The extreme pressure antifriction type drilling fluid is prepared by adopting the following method: mixing 100 parts by weight of water with 4-6 parts by weight of sodium bentonite, stirring at a stirring speed of 1000-4000rpm for 30-60 minutes, then stirring a stirring speed of 6000-10000rpm for 30-40 minutes, and maintaining at normal temperature for at least 24 hours; then adding 0.2-0.8 part by weight of a coating agent for the drilling fluid and 0.5-3 parts by weight of a filtrate reducer for the drilling fluid into the mixture while stirring at a stirring speed of 4000-6000rpm, and then adding 1-5 parts by weight of an anti-collapse agent for the drilling fluid, 0-3 parts by weight of a blocking agent for the drilling fluid, 0.1-1 part by weight of a polyamine inhibitor for the drilling fluid, 0-8 parts by weight of a lubricating agent for the drilling fluid and 0.5-5 parts by weight of an extreme pressure antifriction agent for the drilling fluid; then adjusting pH value of the mixture to be 8-9 by adopting caustic soda; and finally adding a weighting agent for the drilling fluid into the mixture, and uniformly stirring, so that the extreme pressure antifriction type drilling fluid is obtained, wherein the density of the extreme pressure antifriction type drilling fluid is 1.12-1.50g/cm.

Disclosed herein are methods for treating a disease involving α-synucleic aggregation using (1) a compound which reduces the amount of polyamines in an amount effective to reduce α-synucleic aggregation; (2) a compound which inhibits polyamine synthesis in an amount effective to reduce α-synucleic aggregation; or (3) a compound which inhibits α-synucleic aggregation in an amount effective to reduce α-synucleic aggregation. Also disclosed are methods for reducing the amount of α-synucleic aggregation in a brain cell using (1) a compound which reduces the amount of polyamines in an amount effective to reduce α-synucleic aggregation; (2) a compound which inhibits polyamine synthesis in an amount effective to reduce α-synucleic aggregation; or (3) a compound which inhibits α-synucleic aggregation in an amount effective to reduce α-synucleic aggregation. Disclosed herein are also compounds which can be used in the above described methods.

The invention relates to the technical field of oilfield chemical agent preparation, in particular to a reservoir drilling fluid system and a preparation method thereof. Nano microcrystalline cellulose is extracted from natural plant raw materials, a polyamine inhibitor is synthesized from specific raw materials, and the nano microcrystalline cellulose and the polyamine inhibitor are scientifically compounded with calcium formate, a lubricant, a surfactant, a filtrate reducer and other components, so that the obtained drilling fluid system has excellent rheology, filtrate reduction, temporary plugging removal, lubrication and other properties, and the system is low in biotoxicity and good in environmental protection performance; and the preparation method is simple, convenient and feasible, and can realize large-scale production

The invention relates to a preparation method of a high-temperature-resistant binary copolymerized low-molecular-weight polyamine inhibitor for water-based drilling fluid. The problem that an existinginhibitor is poor in temperature resistance and stability is mainly solved. The preparation method of the inhibitor comprises the following steps: performing multi-step reaction on a monomer A and amonomer N-vinyl pyrrolidone according to a molar ratio of (1: 2)-(1: 10) through a catalytic hydrogenation method under the action of metal catalysts such as sodium borohydride and Raney nickel, and synthesizing the low-molecular-weight polymer inhibitor in an aqueous solution polymerization manner. The low-molecular-weight polyamine inhibitor for the water-based drilling fluid is higher in temperature resistance and stability, the inhibition effect of the water-based drilling fluid on a shale stratum can be improved, the well wall stability is improved, underground complexity is reduced, andprogress of the water-based drilling fluid technology and smooth oil-gas exploration are promoted.