322results about How to "Unblock" patented technology

The invention discloses an ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and an experimental method. The experimental facility comprises a rock core clamp holder, a ring compression feed device, an ultrasonic energy converter, an ultrasonic generator, a chemical reagent storage tank connected with a liquid inlet of the rock core clamp holder by a conveying pipeline, a water storage tank, an oil storage tank and a liquid container connected with a liquid outlet of the rock core clamp holder. The experimental method comprises the following steps of: 1, pretreating a tested rock core; 2, testing the initial permeability of the rock core through water drive; 3, polluting the rock core; 4, testing the permeability of the polluted rock core through the water drive; 5, performing an ultrasonic-assisted chemical reagent blockage removal experiment; 6, testing the permeability of the rock core subjected to the blockage removal through the water drive; 7,performing the ultrasonic-assisted chemical blockage removal experiment under the condition of ultrasonic oscillation with different frequencies and amplitudes; and 8, processing data. The ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility has reasonable design, complete functions and high using effect, is easy and convenient to arrange and operate, and can realize the pulse fluctuation of the chemical blockage removal under the action of the ultrasonic oscillation.

The invention discloses a hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and a hydraulic pulse-assisted reservoir chemical remedial treatment experiment method. The experiment device comprises a core holder, an annular pressure supply device, a chemical reagent storage tank, a water storage tank, an oil storage tank and a liquid container, wherein the chemical reagent storage tank, the water storage tank and the oil storage tank are connected with a liquid inlet of the core holder through delivery pipes; the liquid container is connected with a liquid outlet of the core holder; and a hydraulic pulse generating device is arranged on each delivery pipe. The experiment method comprises the following steps of: 1, preprocessing a tested core; 2, measuring the initial permeability of the core by water drive; 3, polluting the core; 4, measuring the permeability of the core by water drive after pollution; 5, performing a hydraulic pulse-assisting chemical reagent remedial treatment experiment; 6, measuring the permeability of the core by water drive after remedial treatment; 7, performing the hydraulic pulse-assisted chemical reagent remedial treatment experiment under the conditions of different frequencies and different amplitudes; and 8, arranging data. The device is rational in design, convenient to arrange, complete in function, simple to operateand good in using effect and can realize pulse fluctuation of the chemical remedial treatment under the action of an injection pressure.

The invention discloses a composite blocking remover and a method for removing blockage of a compact sandstone reservoir pressing crack commissioning horizontal well in a composite manner. The composite blocking remover comprises a preposition liquid, a main treating fluid, an active blocking remover and a subsequent fluid. The preposition liquid is composed of organic acid, inorganic acid, a stabilizer, an oxidizing agent, a chelating agent, a corrosion inhibitor, polyol ether and water. The main treating fluid is composed of organic acid, inorganic acid, the stabilizer, the oxidizing agent, a fluorine carbon surfactant and water. The active blocking remover is composed of a zwitterionic surfactant, the stabilizer and water. The subsequent fluid is water. The composite blocking remover can remove the blockage of routine colloid, asphalt mass and inorganic solid phase particles, and can remove the damage of water blocking and crude oil emulsification by pertinency, and has the advantages of good slow performance, effectively preventing secondary deposition pollution such as the iron ion deposition and acid sludge generation, the horizontal well near-well and deep reservoir pollution can be effectively released, the oil well production power is recovered, and the recovery efficiency can be greatly increased.

The invention provides a biodegradable resin material applied to oil and gas fields and a preparation method for the biodegradable resin material. According to the preparation method for the biodegradable resin material applied to the oil and gas fields, two or three polymers of polyglycolic-colactic acid, polycaprolactone and polylactic acid and a chain extender are subject to melt mixing reaction to obtain a resin alloy, namely the biodegradable resin material applied to the oil and gas fields. The biodegradable resin material applied to the oil and gas fields is prepared from the method, can be prepared into the shapes of sheets, powder, granules, spheres and the like, or can be prepared into the shapes of the sheets, the powder, the granules, the spheres and the like by one of the polyglycolic-colactic acid, the polycaprolactone and the polylactic acid, is used for temporarily blocking filtrate to protect a reservoir, temporarily blocking a blast hole, a constructed layer section and the like in various construction (well drilling, well completing, well repairing, and acidizing and fracturing) operations of the oil and gas fields, and has the advantages of complete degradation and zero damage to stratum.

The invention discloses a composite blocking-removal method for improving the flow conductivity of a triple-low sandstone reservoir, which is applied to the improvement on the flow conductivity of a low-pressure, low-permeability and low-fluidity reservoir in an oilfield so as to improve the outputs of oil wells. The method comprises the following steps of: carrying out preparations for construction, namely respectively filling four kinds of prepared blocking-removal liquid including ammonium-chloride chemical heat-generating liquid, sodium-nitrite chemical heat-generating liquid, surfactant liquid and sandstone deep-penetrating retarded acid liquid into storage and transportation tanks, and transporting the storage and transportation tanks to an oil-well operation site; respectively filling the four kinds of liquid into an oil well by oil tubes or an annular space between an oil tube and a casing pipe; then filling displacement fluid into the oil well; finally closing the oil well, and reacting for four hours so as to complete the composite blocking-removal construction; and opening the oil well, and putting the oil well in oil production. The method disclosed by the invention has the effects that: the reservoir blocking caused by inorganic scales, organic scales and microbial germ contamination can be simultaneously and effectively removed, thereby achieving the purposes of restoring or improving the in-place permeability and improving the outputs of oil wells.

The invention is a kind of compound acidification liquid which contains hydrogen nitrate, fluoboric acid and the manufacturing method, it solves the problem that the blocking effect to formation which has large quantity of clay and low temperature. The character lies in: the compound acidification liquid includes hydrogen nitrate, fluoboric acid and acidification inhibitor and whose content is 2%-25%, 1%-15% and 0.5%-5%, the acidification inhibitor is made up of nitrogen compound, potentiating agent, surface activating agent and solvent waterless alcohol; when using the acidification liquid to be inserted into the formation, the usage is 1-6 m3 in each meter, the time in formation can exist for 4-12 hours, the reacted acidification liquid residue can return to the ground.

The invention relates to a molybdenum-containing semi-conductor photocatalysis material responding to visible light, wherein a molecular formula of the material is M2M1FeMoO6. In the formula, M1 is equal to Li, Na, K, Rb or Cs; and M2 is equal to Be, Mg, Ca, Sr or Ba. A preparation method for the material comprises the following steps that: an M1-containing compound, an M2-containing compound, an Fe-containing compound and an Mo-containing compound are placed into a mortar according to the mol ratio that the M1 to Fe to the M2 to Mo is 1: 1: 1: 1, and are ground and mixed evenly; and the mixture is subjected to presintering treatment the temperature is increased to be between 800 and 1,200 DEG C, and the mixture is at a constant temperature for 1 to 160 hours to obtain the molybdenum-containing semi-conductor photocatalysis material responding to the visible light. The material has low energy band gap, has good absorption under the irradiation of the visible light, and can be used for performing full spectrum absorption on solar light, or is used for removing harmful substances in the air and sterilizing under the irradiation of the visible light, or is used as a photoelectric conversion material, or is used for producing hydrogen and oxygen by performing photocatalytic analysis on water, or is used for removing organic substances which are harmful to people in sewage by the degradation. The material has the advantages of low synthesis cost, and simple and easy method.

The invention provides a degradable resin nano-composite material for oil and gas field operation and a preparation method thereof. The preparation method of the composite material comprises the steps of using two or three polymers of polycaprolactone, polybutylenes succinate and polylactic acid as raw materials, adding inorganic nano-materials and chain extender, performing melt-mixing reaction to prepare resin nano-alloy, i.e., the degradable resin nano-composite material for oil and gas field operation. The composite material is prepared by adopting the method, can be prepared into sheets, powder, particles, spheres and the like, or can be prepared into sheets, powder, particles, spheres and the like by using mixture of one of polycaprolactone, polybutylenes succinate and polylactic acid and the inorganic nano-materials, is used for temporary plugging and filtration reduction to protect reservoirs and temporary plugging of blast holes and constructed layer sections and the like during various construction operations (drilling, well completion, well repair and acid fracturing) in oil and gas fields, and has the advantages of complete degradability and zero harm to formations.

A mechanical relieving-chock packer which can improve oil yield of oil-well mechanism is composed of upper contact, positive uniflow valve, upper central tube, reducer plunger unit assemblage, lower contact, lower central tube, hollow vibration ring unit assemblage, vibrating plate set, outer tube, reverse uniflow valve and sieve tube etc. The reducer plunger unit assemblage is packaged on middle part of the upper central tube. The hollow vibration ring unit assemblage is packaged on upper part of the lower central tube. The vibrating plate set is equipped on middle part of the lower central tube. The invention is equipped in the bushing linking the oil pipe in lower part of oil-well pump. When the oil extractor is in upward stroke, the packer moves upward with the elastic shrinkage of the oil pipe, which strikes the hollow vibration ring unit assemblage to generate vibration wave. It also forms a high-pressure area in lower part of the reverse uniflow valve to generate a high-pressure hydrodynamic wave. It has the same process when the oil extractor is in downward stroke. The packer utilizes the cyclical elastic distortion of oil string to realize cyclical pulse-type alternating motion. It translates striking energy inside system and changing energy of liquid pressure into fluctuating energy, conducts it into the oil channel in the stratum and relieves oil-layer chock, which can enhance the oil yield.

The invention discloses a method for releasing blockage of hydrate in an oil and gas conveying pipeline. The method comprises the following steps: the two ends of a hydrate blockage segment in the oil and gas conveying pipeline are communicated with a gas and liquid recycling tank through rapid joints, then pressure reduction is carried out on the two ends of the hydrate blockage segment in the oil and gas conveying pipeline, and pressure in the two ends of the hydrate blockage segment is kept balanced; communication between the rapid joints and communication between the gas and liquid recycling tank and the rapid joints are switched off, hydrate inhibitors and/or high-temperature material flows are injected into the hydrate blockage segment, and the hydrate in the oil and gas conveying pipe is decomposed. The method has the beneficial effects that the operation utilizing the hydrate for treating sledging and unblocking is easy, and blockage caused by generation of the solid hydrate in the oil and gas conveying pipeline on the sea can be effectively released; and the independent pressure reduction unblocking method can be adopted, or a pressure reduction and heat agent injecting/injection heat integration unblocking method is adopted, and the method is used for releasing the blockage caused by the solid hydrate in the oil and gas conveying pipeline.

The invention discloses a compound plug removal agent for a tight sandstone oil reservoir, and belongs to the technical field of oilfield exploitation. The compound plug removal agent is composed of prepad fluid, main body fluid and post-pad fluid, wherein the prepad fluid and the post-pad fluid each contains hydrochloric acid, potassium chloride, ethylenediaminetetraacetic acid, water plug removal agents, corrosion inhibitor and ethylene glycol butyl ether, and the main body fluid contains fluosilicic acid, hydrochloric acid, potassium chloride, ethylenediaminetetraacetic acid, water plug removal agents, corrosion inhibitor and ethylene glycol butyl ether. According to pollution plugging which possibly occurs in the development process of the tight sandstone oil reservoir, corresponding treatment fluid in the compound plug removal agent is sequentially infused into the reservoir according to the three stages of front, middle and rear, and the purposes of removing reservoir plugging, increasing effective permeability of the reservoir, improving the plug removal effect and recovering per-well production can be achieved. The hydrochloric acid is matched with the fluosilicic acid to serve as the components of the main body fluid, plug removal is achieved, and meanwhile the reservoir is protected against secondary pollution.

The invention provides a water block removing agent and a preparation method thereof. The water block removing agent comprises the following substances by weight: 10 to 12% of a weak hydrophilizing agent, 8 to 10% of an acid-soluble oxidizing agent and 0.5 to 1.5% of a corrosion inhibitor, with the balance being water. The water block removing agent is applicable to Changqing ancient low-permeability sandstone gas-bearing formations, enables strong hydrophilicity of low-permeability sandstone gas reservoirs to be changed into weak hydrophilicity, eliminates capillary force in reservoir strata, enters a part of solid-phase particles and cellulose via acid dissolution, decomposes macro-molecular polymers via oxidation, removes blocking and improves gas flooding efficiency in water removal; thus, the restoration ratio of rock core permeability is obviously improved.

The invention discloses a downhole low-frequency hydraulic pulsation coupled hydraulic ultrasound generation system applied to injection augmentation of low-permeability reservoirs. The system comprises a low-frequency hydraulic pulsation generation part and a hydraulic ultrasound generation part, wherein the low-frequency hydraulic pulsation generation part mainly comprises a frustum-shaped cylinder assembly, a compound frustum-shaped piston matched with the frustum-shaped cylinder assembly, a returning spring and the like; the cylinder body, the piston and the returning spring form a hydraulic reciprocating vibration system for generating low-frequency hydraulic pulsation in water injection process of a water injection well; the hydraulic ultrasound generation part comprises a flowing channel nozzle and a vibrating reed and is used for generating ultrasound under hydraulic action of the injected water flow and applying the ultrasound to the reservoirs; the hydraulic ultrasound is capable of removing blockage of reservoirs close to the well wall; the low-frequency hydraulic pulsation is capable of effectively improving permeability of the reservoirs, reducing the surrounding flow of the injected water, improving the volumetric sweep efficiency and augmenting injection and assisting for increasing recovery ratio; the system is capable of outputting low-frequency hydraulic pulsation and hydraulic ultrasound of a hydraulic driving manner based on operation displacement range of the low-permeability water injection well, integrally augmenting injection and improving the recovery ratio.

The invention discloses a compound acid blockage removing fluid. The blockage removing fluid is prepared from raw materials in parts by weight as follows: 4-6 parts of a foam flushing fluid, 20-30 parts of a prepad fluid, 70-100 parts of main acid and 10-20 parts of postpad fluid. The acid fluid has higher capacity of removing organic sediment pollution and high acid residue and emulsifying resistance. The acid fluid has low corrosion speed and good swelling inhibition and does not change the original water wetting characteristic of the stratum.

This invention discloses a a preparation method of low temperature stratum self generating gas deblock agent. It is made up by A medicament, B medicament and C catalyst. A medicament is made up by hydrochloric acid, glacial acetic acid, phosphoric acid, mutual solvent, and they are mixed in room temperature to uniform solution, the quality content is that hydrochloric acid 15-18%, glacial acetic acid 5-2%, phosphoric acid 5-2%, mutual solvent 3-1% water 72-70%. B is made up by dicyandiamide, ammonium nitrate, urea, and they are agitated for 5 hours in reaction tank at the temperature below 50 degrees centigrade, and then they are crystallized and filtrated, the quality content is that dicyandiamide 35.8-33.8%, ammonium nitrate 34.-32.2%, urea 30-28%. Catalyst C is a molybdenum contain oxide, its addition quality is 0.1-0.3%. A, B and C are mixed as quantity rate 10-8 to 1-2 to 0.1-0.3 when they are used, but B and C are mixed first with four times water.

The invention relates to a safe zebra crossing-traversing system. The safe zebra crossing-traversing system comprises a door beam structure and a controller. The door beam structure comprises a horizontal beam and two vertical columns; the two vertical columns are vertically fixed on two sides of the zebra crossing; the horizontal beam is arranged above the zebra crossing, and two ends of the horizontal beam are correspondingly connected with upper ends of the two vertical columns respectively; the vertical columns have traversing buttons pressed by a pedestrian who needs to traverse the road,and pedestrian traffic lights are also installed on the vertical columns; both sides of the horizontal beam in the travel direction of the vehicle have, first infrared scanners for scanning whether pedestrians are on the zebra crossing; vehicle traffic lights are installed on both sides of the horizontal beam in the travel direction of the vehicle; the traversing buttons, the pedestrian traffic lights, the vehicle traffic lights, and the first infrared scanners are electrically connected to the controller. The safe zebra crossing-traversing system provides an orderly and effective control ofthe pedestrian traffic lights and the vehicle traffic lights according to the traversing intention and the traversing state, so that the zebra crossing-traversing becomes safe, orderly and smooth.

A damper 12 for a door handle comprises a rotor 50 and a valve 56 which are completely separated and only the rotor 50 rotates, so that it is possible to significantly reduce the torque applied to the rotor 50. When the rotor 50 and the valve 56 are connected, or separated , torque applied to the rotor 50 is changed greatly. Accordingly, instead of gradually changing torque according to a rotational angle of the rotor 50, it is possible to set a specific point where torque is changed.

The invention discloses a method for batch preparation of chicken Eimeria coccidium oocysts, and particularly relates to a separation and purification method for producing oocysts (antigens) of chicken Eimeria coccidium vaccines. The method for preparing the chicken Eimeria coccidium oocysts comprises the following process steps: fecal sample processing, continuous screening, saturated brine float centrifuging, oocyst centrifugal depositing and oocyst purifying. According to the method, the industrial preparation of the chicken Eimeria coccidium oocysts can be realized, the production efficiency can be improved, and the cost can be reduced.

The invention relates to a nursing mattress based on detecting respiration and realizing sleeping posture transformation, comprising an airbag module, a controller module and a flexible pressure-sensitive sensor module. The flexible pressure-sensitive sensor module is arranged on the airbag module. The controller module controls the flexible pressure-sensitive sensor module and performs corresponding actions with the airbag module. The nursing mattress based on detecting respiration to realize sleeping posture transformation is characterized in that the airbag module comprises airbags, a piece of bottom cloth and an air-inflating pump. 200 air bags form an airbag cell array. 200 air bags are arranged on the bottom cloth in an array of 10 * 20, which is 10 rows, 20 columns and each airbag has a size of 100 millimeters x 100 millimeters. The overall size of the airbag cell array is 2000 millimeters x 1000 millimeters. Each gas nozzle of the airbag is connected with a branch rubber trachea. The branch rubber trachea of the adjacent two airbags is connected by a T word interface and then a three position and three way solenoid valve is connected. The other two ports of the three position and three way solenoid valve is respectively connected with an intake pipe and an outlet pipe. The intake pipe is connected with a pneumatic gas path rubber trachea through a conversion interface.

The invention discloses a polymer flooding oil reservoir microbial plugging removal method. The method specifically comprises the following steps of: screening polymer flooding oil reservoirs and selecting polymer flooding oil reservoirs with oil reservoir temperature being lower than 80DEG C and increase of water injection pressure exceeding 50 percent before and after polymer injection; conducting indigenous microbial plugging removal feasibility analysis, and selecting indigenous plugging removal if indigenous microbial plugging removal conditions are satisfied; conducting exogenous microbes screening if the indigenous microbial plugging removal conditions are not satisfied; optimizing a field injection process to obtain field injection process parameters; conducting field construction and effect tracking. The polymer flooding oil reservoir microbial plugging removal method has the advantages that the method is safe and environmental-friendly and activator used in the method is harmless and nontoxic; the field testing effect is good and the rate of decrease of injection pressure of the oil reservoirs exceeds 50 percent; the construction process is simple, the cost is low, and the effective period is long and is more than 24 months; the acting range is wide, not only can plugging in belts near oil wells be removed, but also plugging at deep positions of the oil reservoirs can be removed, and thus the method can be widely applied to the polymer flooding oil reservoir plugging removal process.

The invention discloses a minimally invasive collective integral acupotomy scope, which comprises a light microscope assembly of a scope-acupotomy integral body, a tube core assembly of the scope-acupotomy integral body and a hard sleeve assembly of the scope-acupotomy integral body. The light microscope assembly of the scope-acupotomy integral body comprises a lens, a lens base and a light guide tube. The tube core assembly of the scope-acupotomy integral body comprises a knife tube core. The hard sleeve assembly of the scope-acupotomy integral body comprises a knife tube. The light guide tube is inserted in the knife tube core. The knife tube core is inserted in the knife tube. An operation method of the minimally invasive collective integral acupotomy scope disclosed by the invention comprises the following steps of: (1) holding the acupotomy scope, and inserting the acupotomy scope into a knee joint through front external approach; (2) opening a water inlet channel to full a joint cavity; and (3) sequentially searching suprapatellar bursa, patellofemoral joint, internal tibia clearance, fossa intercondyloidea, external tibia clearance, knee lateralis sulci, rear internal clearance and rear external clearance, wherein the scope surface angle of the whole acupotomy scope is correspondingly adjusted according to searched specific parts in the searching process.