326 results about "Viscous oil" patented technology

A flow balancing system for long screen sections particularly useful in high viscosity hydrocarbon production features an annular flow path whose height and length can be varied to provide a predetermined resistance to a given flow rate of a material of a given viscosity. In assembling a long length of screen sections, greater resistance configurations are placed closer to the wellhead end of the screen section with the more remote sections having progressively less restriction until the furthest section of the screen string where low or no resistance to flow internally to the screen section is offered.

The invention discloses a W / O / W type active viscous oil blocking agent. The blocking agent comprises internal phase water, viscous oil and external phase water. A nonionic surfactant is adopted between the internal phase water and the viscous oil. An ionic surfactant is adopted between the viscous oil and the external phase water. According to the invention, a W / O / W composite structure is adopted, W / O with a relatively large viscosity is coated by the external phase water layer, such that defects in prior arts of high viscosity, high construction pressure and poor selectivity upon an oil-water layer during an active viscous oil blocking agent injection process are overcome. With the blocking agent provided by the invention, the ground fluidity is good, and the injection pressure is low. When the blocking agent enters the stratum, the emulsion is demulsified, and W / O emulsion with a high viscosity is released, such that oil well water exits can be effectively blocked, and defects of existing active viscous oil blocking agents are overcome. The technical scheme provided by the invention is especially suitable for technical features of offshore oilfields.

A washing machine having a ball balancer coupled to the drum to compensate for a dynamic imbalance during rotation of the drum, the ball balancer including a ring-shaped racer having a closed internal space in which a plurality of balls and viscous oil are accommodated, the ring-shaped racer including a first injection molded member and a second injection molded member joined to each other to form the closed internal space, the first injection molded member including a first side wall, a second side wall and a connecting wall between the first side wall and the second side wall, the first injection molded member having an open side opposite to the connecting wall, and the second injection molded member is adapted to cover the open side of the first injection molded member.

Disclosed is a washing machine having ball balancers, which adjust a relation between a gap, between the inner wall of a racer of each of the ball balancers and balls, and viscous oil, so as to reduce the vibration and noise of the washing machine. Each of the ball balancers of the washing machine includes balls and viscous oil accommodated in a racer, and the viscosity of the viscous oil is varied in proportion to a gap between the racer and the balls. When the viscosity of the viscous oil is 1˜100 cSt, the gap is set to 0.5˜1.0 mm, when the viscosity of the viscous oil is 100˜380 cSt, the gap is set to 1.0˜2.0 mm, and when the viscosity of the viscous oil is 380˜1,000 cSt, the gap is set to 2.0˜3.0 mm. Thereby, the relation between the gap and the viscous oil is optimized, and the ball balancers effectively exhibit a balancing function and thus minimize the vibration and noise of the washing machine.

A water-based polymer drilling fluid, containing effective quantities of surfactants having HLB numbers equal to or greater than approximately 7, emulsifies oil and bitumen contained in oil sand cuttings, resulting in the oil and bitumen being dispersed into the mud as an emulsion. This eliminates or significantly reduces the ability of the oil, bitumen, and cuttings to clog the well or stick to drill string components when drilling a well through oil-bearing sands, particularly sands containing highly viscous oil or bitumen. The emulsification process separates the sand particles from the oil and bitumen, such that the sand particles can be removed when the mud is run through a conventional shale shaker or other suitable apparatus.

The invention relates to a method for improving the oil deposit recovery ratio of deep massive extremely-viscous oil in an extraction mode of gravity drainage assisted steam flooding. In the method, superposition horizontal wells are arranged among wells by combining results of researches on the fine contrast of small geological strata of massive oil deposit, the distribution rule of interlayer, the distribution rule of remaining oil and the like and a fine research on numerical simulation; an upper superposition horizontal well is used for injecting steam, a peripheral vertical shaft is used for production, and a lower superposition horizontal well is used for discharging liquid (crude oil between condensate water and the horizontal wells); and thus, a production-injection ratio of high-speed steam injection of deep oil deposit is improved, the dryness of steam on the well bottom is improved, the pressure of an oil layer is reduced, a steam cavity is easy to expand, the swept volume is improved, a development effect is improved, and the aim of improving the recovery ratio finally is fulfilled.

To recover in situ viscous oil from an underground reservoir, electricity is conducted through the underground reservoir by at least two electrodes in an amount that would, in the absence of solvent injection, cause water in the reservoir to vaporize adjacent to the electrodes, and injecting solvent into the reservoir to mitigate water vaporization adjacent to the electrodes by vaporizing solvent in this region. Oil and solvent are produced through one or more production wells.

The invention relates to a viscous oil exploitation method, in particular to a fire flooding oil exploitation method used for gas injection by a vertical well and oil exploitation by horizontal well. The invention adopts the compound well-layout manner of steam injection by vertical wells and oil exploitation by horizontal wells, which means that six vertical wells are for gas injection and two oil exploitation wells for oil exploitation, or nine vertical wells for gas injection and three oil exploitation wells for oil exploitation. When the wells are drilled, the vertical wells are drilled until they reach the half thickness of an oil layer, and gas is injected above the half thickness of the oil layer. The horizontal wells are under the half thickness of the oil layer. The gas-cap pressure produced by burning of the gas-injected oil layer of the above vertical wells presses the crude oil of the lower part, while the crude oil flows to the horizontal well sections by the self-gravity and then is exploited from the exploitation wells . The invention overcomes the shortcoming that gas channeling can be easily formed horizontally along an oil layer in a high-penetration passage inside the oil layer, and promotes the final recovery rate of the oil layer through fire flooding by fifteen percent.

The invention relates to a viscous oil emulsification and viscosity reduction agent. The emulsification and viscosity reduction agent comprises an anionic surfactant, a nonionic-anionic Gemini surfactant, a C1-C8 alcohol and water, wherein the weight ratio of the anionic surfactant to the nonionic-anionic Gemini surfactant to the C1-C8 alcohol is 1:0.1-40:0.01-10, and the water amount is 0.2-5000 times the total weight of the anionic surfactant, the nonionic-anionic Gemini surfactant and the C1-C8 alcohol. The emulsification and viscosity reduction agent has the advantages of no alkalis, strong mineral salt resistance, realization of emulsifying ultrahigh-viscosity viscose oil having above 30% of asphaltene, low viscosity of the emulsified oil, moderate emulsification cost and the like.

The invention relates to a demulsifier, a preparation method thereof and the application thereof. The basic component of the demulsifier is a polymer, the molecular chain of the polymer is composed of segmers formed from copolymerization of styrene and unsaturated acid and polyether segmers; the two types of segmers are connected by ester bonds. Final products are obtained firstly through reaction of the unsaturated acid with polyether, in which unsaturated groups are induced and then through copolymerization of the polyether, the unsaturated acid and the styrene. The demulsifier of the invention is particularly applicable to the demulsification and dehydration of high-asphaltene viscous oil and is characterized by small dosage, quick dehydration and good demulsification effect.

The invention relates to a method for treating ageing oil of viscous oil, which provides a demulsifier for ageing oil of viscous oil, comprising the following raw materials in weight percent: 0.5-1% phenol, 1.5-2% styrene, 0.5-1% ethyleneamine, 0.5-1% formaldehyde, 0.5-1% catalyst, 40-50% ethylene oxide and 40-50% epoxypropane. The invention further provides a three-phase decanter centrifuger, comprising a differential mechanism, a spiral propeller, a rotary drum, a housing, an engine base, a motor and a feed pipe. The invention further provides a method for treating ageing oil of viscous oil, comprising the following steps of: using the demulsifier to perform demulsification treatment to the ageing oil of the viscous oil, then inputting the ageing oil of the viscous oil after the demulsification treatment in the three-phase decanter centrifuger to centrifuging and separating so as to respectively obtain fatlute, sewage and the oil. The ageing oil, especially the ageing oil of the viscous oil, is treated by adopting the demulsifier to combine with the centrifuging method; the demulsification and dehydration problem of the ageing oil of viscous oil in the oil field is solved, and the requirement of the field production can be satisfied.

The invention relates to a compound demulsifier and a use method thereof. The compound demulsifier comprises alkyl ester of styrene-maleic anhydride copolymer and ethylene oxide-propylene oxide block polymer, the mass ratio of which is 0.1 to 10: 1. The compound demulsifier of the invention, through compound use of the alkyl ester of styrene-maleic anhydride copolymer and the ethylene oxide-propylene oxide block polymer, can achieve better demulsification effect and is particularly applicable to the demulsification and dehydration of high-asphaltene viscous oil.

Viscous oil residues are located based on fluorescence polarization. Methods and apparatus in accordance with the invention may be integrated with autonomous and remotely operated undersea vehicles to map the location of oil spills.

The invention discloses a temperature-resistant salt-tolerant viscous-oil biological viscosity reducer and a preparation method thereof, and belongs to the technical field of petroleum exploitation. The temperature-resistant salt-tolerant viscous-oil biological viscosity reducer is composed of microzyme, a seed liquid medium, a fermentation liquor medium and water. The microzyme is torulopsis candida. The preparation method of the viscosity reducer comprises (1) preparation of a microzyme seed liquid; (2) early-stage preparation of the fermentation liquor medium; (3) fermentation production of microzyme; (4) collection of a fermentation product; and (5) preparation of the viscous-oil biological viscosity reducer. The viscous-oil biological viscosity reducer is green and free of pollution by employing agricultural and sideline products as raw materials. The provided viscous-oil biological viscosity reducer possesses the temperature resistance up to 150 DEG C, the salt tolerance up to 2*10<5> mg / L, and the viscous-oil viscosity reduction rate up to 99% or more. The enforcement method of the viscous-oil biological viscosity reducer is simple. The viscous-oil biological viscosity reducer is substantial in effect, is capable of saving energy, reducing consumption and preventing pipelines from fouling and being corroded, and the subsequent crude-oil demulsification dewatering processing is easy. Therefore, the viscous-oil biological viscosity reducer is widely applicable to shaft elevation of a viscous oil well and ground pipeline conveying technology.

The invention relates to a method and device for reducing viscosity of a shaft applicable to extremely-viscous oil recovery. The method comprises the steps that mixed liquid of thin oil and viscosity reduction agent is injected to the bottom of an oil well, and the extraction operation of the oil is carried out after the mixed liquid is mixed with the viscous oil. The device comprises an intersected thin oil pipeline (3) and a viscosity reduction agent pipeline which is connected with a medicine storage tank (1) and a measuring pump (2), and the intersected pipelines are sequentially connected with an annular space of a ground mixing device (5) and an oil well bushing (6). Through the simple technique modification, the viscosity reduction agent is used for substituting partial thin oil, so that a good effect can be realized in the recovery process of the extremely-viscous oil, the thin oil can be saved by more than 70 percent, and the recovery cost of the extremely-viscous oil can be greatly reduced.

The present invention provides a viscous crude emulsion phase-converting profile control water-plugging method and its phase-converting agent. In the viscous crude system 0.4-1.0% of oil in water emulsion and 3%-10% of phase-converting agent are added, then injected into formation to implement said ivnented method. The oil in water emulsion is a mixturwe of non-ionic surfactants of OP series. Tween series, Span series and sodium carboxylate, etc. and inorganic salts of sodium carbonate, etc. and the phase-converting agent is a mixture of oil-soluble surfactants of OP series or Span series or non-ionic surfactants or organic acid ester, etc. and rosin or asphalt powder or coal powder or bentonite, etc. Said invention developes a effective phase-converting agent, and can implement profile control water-plugging function.

The invention relates to a method for improving recovery rate of a thick massive viscous oil reservoir by controlling burning gas injection speed, which mainly comprises the following steps of: determining the thickness and residual oil saturation of an oil layer at the burning front edge by stages according to the condition and rule of fire-flooding live wire wave by combining fine research results of double analogs in a massive oil reservoir chamber; then determining planar residual oil saturation and residual oil at different positions apart from a gas injection well, and predicting the burned section area of the burning front edge, the non-homogeneity of the reservoir and the optimal configuration relationship between the residual oil and the gas injection speed; and finally, dynamically adjusting the single-well gas injection speed by stages, and selecting a variable and lower burning gas injection speed to maintain stable and normal burning on the premise of ensuring combustion. The method can fulfill the purposes of improving the burning wave and volume of the massive oil reservoir, the development effect of the burning oil layer and the final recovery rate.

The invention provides a high-efficiency flushing fluid applicable to cementing of a horizontal shale gas well. The flushing fluid has certain shearing force and viscosity, exerts a dragging effect on oil slurry and an oil film under the action of hydraulic machinery and achieves the purposes of effective cleaning of the oil film and replacement of a viscous oil-based drilling fluid. The flushing fluid is mainly composed of a nonionic surfactant, an anionic surfactant, organic acid and a viscosity and shearing force improving agent, and comprises, by weight, 2 to 10 parts of the nonionic surfactant, 2 to 7 parts of the anionic surfactant, 2 to 4 parts of organic acid, 0.5 to 5.0 parts of the viscosity and shearing force improving agent and 72 to 100 parts of clear water. The flushing fluid provided by the invention has a high efficiency flushing effect on drilling fluids with high viscosity and shearing force and with a wide range of the oil-water ratio, e.g., from 60 / 40 (v / v) to 90 / 10(v / v).

The present invention provides a fluid injection apparatus for injecting viscous fluids directly from a syringe in which it is commercially delivered. The fluid injection apparatus includes a cylindrical syringe sleeve into which the syringe is inserted from one end with a small hole at the other end of the sleeve through which the syringe needle or cannula protrudes. The apparatus includes a locking head assembly for retaining the syringe in the cylindrical syringe sleeve which includes a top plate and a locking flange which engages with the flange for locking the head assembly to the cylinder. The plunger in the syringe is discarded and when the locking head assembly is placed on the cylindrical syringe sleeve an internal flange with a gasket located on it is inserted into the top of the syringe chamber forming a seal. The head assembly includes a tube coupling for connecting a pressurizing gas such as air to the cylinder through the interior of the internal flange for pressurizing the syringe for expelling the viscous oil through the needle or cannula.

The present invention relates to a shock absorption control equipment for large-span pedestrian overhead bridge, harbour landing stage and related structure, it can be used for reducing the resonance reaction of bridge structure under the action of pedestrian load and transverse wind load. It is characterized by that the bottom portion of mass-tuning shock damper is equipped with a transverse moving mechanism formed from box-type beam-slab, guidway and wheels, and also equipped with transverse spring and transverse viscous oil damper.

The invention relates to a 1206 lubricating grease, comprising the following components by weight percent: 2-4% of aluminum isopropoxide, 4-6% of aminated bentonite, 3-5% of stearic acid, 1-3% of benzoic acid, 37-41% of viscous oil in refined naphthenic base, 29-43% of viscous oil in refined paraffin base, 1-3% of zinc dialkyl dithiophosphate, 1.6-2.9% of triazole fatty acid ammonium salt, 0.1-0.5% of a triazole derivative, 0.8-1.8% of tricresyl phosphate, 1.2-5% of polyisobutene and 0.7-1% of ethyl carbamate. Compared with the prior art, the 1206 lubricating grease is high in dropping point, large in sintering load data and relatively good in compression and wear resistance, and the more outstanding feature is as follows: the steel mesh is excellent in oil dividing, the embodiment 3 is 1 / 10 of the 1275 grease of LE company of America, and the embodiment 1 is not greater than 1 / 8; obviously, the pollution in the operation is smaller, the resource can be saved more, and the operation period of the equipment can be prolonged.

The invention relates to an oxidization viscosity reducer for viscous oil recovery by steam injection and a preparation method thereof. The oxidization viscosity reducer comprises components by weight percentage: 0.5 to 10 percent of component A, 0.5 to 10 percent of component B, 0.1 to 8 percent of component C, 0.1 to 5 percent of component D, and the balance being water, wherein the component Ais peroxide, the component B is transition metal salt of an organic acid, the component C is inorganic salt with the acidity shown in a hydrolysate, and the component D is an alkaline substance. The oxidization viscosity reducer can oxidize gelatine and asphaltine in viscous oil, reduce the viscosity of crude oil by changing a structure of the viscous oil through chain termination, oxidize to generate an acid substance at the same time, ensure that the viscous oil becomes a substance with the effect of a surfactant by adding the alkaline substance, and also play a role in viscosity reduction.The experiments show that the viscosity reduction rate can reach 99.9 percent when the viscosity reducer reacts with the crude oil for 24 hours at the temperature of 100 DEG C. The viscosity reducer has higher viscosity reduction rate, is applicable to the viscosity reduction of oil well stratums with high steam injection temperature, and also has good effect under relatively lower temperature conditions.

The invention relates to an oil well water shutoff agent and an oil well water shutoff method. The oil well water shutoff agent comprises an anionic surfactant, a nonionic-anionic surfactant, C1-C8 fatty alcohol, viscous oil and water. The oil well water shutoff agent has the characteristics of strong high-mineralization water resistance, strong temperature tolerance, strong stability, low cost, no pollution to stratums, and the like.

The invention is directed to a method for controlling driving fluid breakthrough caused by zones of pressure communication, i.e., a matrix bypass event (“MBE”) or a wormhole, having a void space and possibly areas of enhanced permeability (a halo region) associated with the void space, within a subterranean formation arising from use of a driving fluid in reservoirs where heavy / viscous oil is being produced. In particular, the method is directed to remediation of pressure communication between injection and production wells used to produce heavy / viscous oil by way of a waterflood operation combined with a cold production method. Direct or rapid communication of water between the injector and producer wells makes the waterflood recovery process virtually ineffective and limits the production of oil from the reservoir. The invention comprises in embodiments a method wherein a slurry of a cementitious material is injected into the zone, which upon setting, provides a cement plug in the void space that reduces the pressure communication and flow of driving fluid within the zone. Another step is used to inject a gel precursor within the zone, which upon setting, produces a gel plug that also reduces pressure communication and driving fluid flow through the halo region of the zone.

The invention relates to an apparatus for measuring the corrosion rate of a down-hole string by flue gas. The apparatus comprises a gas source portion, a gas mixing portion and a corrosion environment simulation reaction kettle; the gas source portion comprises an oxygen source, a nitrogen source and a carbon dioxide gas; the gas mixing portion comprises a mixing pressurized container; and the corrosion environment simulation reaction kettle comprises a kettle body, experimental rotating parts axially arranged in the kettle body, and a motor driving the experimental rotating parts, and the experimental rotating parts comprise a rotor and a film hanger. The apparatus can simulate the real corrosion conditions of the down-hole string in flue gas assisted viscous oil recovery, and can meet the test of the corrosivity of the flue gas under different conditions.

The invention relates to a composite catalysis emulsification viscosity reducer used for the viscous oil recovery adopting steam injection and a preparation method thereof. The viscosity reducer combines the viscous oil catalytic viscosity reduction technology and the emulsification viscosity reduction technology, is suitable for the underground viscous oil or super viscous oil recovery adopting steam injection and is complexed by using nickel acetylacetonate as catalyst and sodium dodecyl benzene sulfonate as emulsifier. The viscosity reducer comprises the following components by weight percent: 0.1-0.5% of nickel acetylacetonate, 0.1-0.3% of sodium dodecyl benzene sulfonate and the balance water. The viscosity reducer is a composite viscosity reducer and has good viscosity reduction effect; and through complexing, the application range of the viscosity reducer becomes wider and the viscosity reducer has better effect under lower temperature. Tests prove that after the composite viscosity reducer reacts with viscous oil at 200 DEG C for 18h, the viscosity of viscous oil can be reduced from 218284mPa.s to 3095mPa.s and the viscosity reduction rate is up to more than 98.5%.

The invention provides a temperature-resistant jelly comprising the following components in percentage by mass: 0.3-0.5% of an acrylamide / acryloyloxyethyl trimethyl ammonium chloride copolymer, 0.1-0.5% of sodium tripolyphosphate or / and amino methenesodium phosphate, 0.05-0.15% of phenol, 0.05-0.1% of paraformaldehyde, 0.2-0.4% of thiourea, 0.05-0.2% of sodium malonate or / and D-sodium erythorbate and the balance of water, wherein the total mass percentages of each component are 100%, the relative molecular mass of the acrylamide / acryloyloxyethyl trimethyl ammonium chloride copolymer is 200*10<4> to 500*10<4>, and the mass content of an acryloyloxyethyl trimethyl ammonium chloride monomer is 10-30%. According to the jelly provided by the invention, the gelling time of the jelly can be adjusted in a range of 15-54 hours, the jelly is excellent in temperature-resistant performance, and a water loss shrinkage phenomenon cannot be caused after the jelly is aged for 180 days at 160 DEG C; and the jelly can be used as a plugging agent applied to near borehole zones and oil well deep parts, and can also be used for sealing steam channeling in a thermal exploitation process of viscous oil.

The invention discloses a fluorine-containing amphiphilic polymer viscosity reducer for crude oil and a preparation method thereof. The method comprises the steps as follows: (1) a water-soluble monomer and a perfluoroalkyl acrylate monomer are dissolved in water to obtain a water-phase solution, wherein the water-soluble monomer comprises at least one of acrylamide, acrylic acid, acrylonitrile, acrylic ester and allyl alcohol; the structural formula of the perfluoroalkyl acrylate monomer is CH2=CHCOO(CH2)m(CF2CF2)nF, wherein, m is a natural number from 1 to 3 and n is a natural number from 3to 6; (2) cyclohexane, an emulsifier and an initiator are added into the water-phase solution and stirred to obtain water in oil type emulsion liquid; and (3) after a pH (potential of hydrogen) valueof the water in oil type emulsion liquid is adjusted until representing alkalinity, inverse emulsion polymerization is conducted and then the fluorine-containing amphiphilic polymer viscosity reducerfor the crude oil is obtained. The fluorine-containing amphiphilic polymer viscosity reducer for the crude oil, which is provided by the invention, achieves a good emulsion effect on viscous oil, andthe viscosity reduction rate of the viscous oil is larger than or equal to 90 percent.

The invention discloses a viscosity reducing composition, which comprises (a) phenolic compounds and (b) thin oil; wherein the phenolic compounds can be alkyl phenol and / or alkyl naphthol, the alkyl chain comprises 6 to 16 carbon atoms, and the weight ratio of the phenolic compound to the thin oil is 1:1-300. The invention further provides a method for reducing the viscosity of viscous oil, and comprises a step of contacting the provided viscosity reducing composition with viscous oil. The provided method can effectively reduce the dynamic viscosity of viscous oil.