57results about How to "Reduce friction coefficient" patented technology

The invention provides water-based drilling fluid for stabilizing shale. The drilling fluid is formed by mixing sodium-based bentonite, a shale inhibitor, a tackifier, a flow-pattern adjusting agent, a filtrate reducer, a high-temperature-resisting processing agent, a bridging agent, bridging particle and an anti-collapse agent. Calculated by the addition quantity in every 100 parts of water, the water-based drilling fluid comprises the following components in parts by mass: 5 parts of sodium-based bentonite, 1.5 to 1.8 parts of shale inhibitor, 0.5 to 0.7 part of tackifier, 0.1 to 0.2 part of flow-pattern adjusting agent, 0.7 to 0.9 part of filtrate reducer, 2.3 to 2.5 parts of high-temperature-resisting processing agent, 9.33 to 10.67 parts of bridging agent, 1.8 to 2.2 parts of bridging particle and 1.1 to 1.3 parts of anti-collapse agent. The drilling fluid is good in rheological property, filtrate reduction property and lubricating property and strong in inhabitation property, so that the requirement of the shale gas horizontal well drilling cuttings carrying and wall stability requirement can be met, and the probability of drilling seizure can be reduced.

The invention relates to a temperature-resistance drilling fluid drill-feeding plugging agent and its preparation method, the drill-feeding plugging agent comprises the following components by weight: 30-80 parts of vegetable fiber, 10-40 parts of mineral fiber, 10-40 parts of fruit shell, 0-10 parts of powdered steatile, and 3-10 parts of silicon-based gel deformation particles. The silicon-based gel deformation particles enable emulsification and dispersion of 1.4-2.5 parts of vinyltriethoxysilane monomer according to weight to an aqueous solution composed of 18-24 parts of acrylamide, 0.0025-0.005 parts of N,N'-methylene bisacrylamide, 0.7-1.25 parts of OP-10 and 0.1-0.17 parts of sodium dodecyl benzene sulfonate, 0.003 parts of disodium ethylene diamine tetraacetate, 0.009-0.12 parts of ammonium persulfate and 0.009-0.012 parts of sodium bisulfate, a process of micellar copolymerization is carried out, a polymer is dried, granulated and crushed to obtain the silicon-based gel deformation particles with average particle size of 80-200 meshes; easy-leakage highly-permeable stratum and micro crack are effectively plugged, rheological parameter of the drilling fluid is not influenced, frictional resistance coefficient of the drilling fluid is reduced, a storage layer is protected, and the drill-feeding plugging agent is suitable for plugging the easy-leakage stratum and the storage layer.

The invention discloses a seawater silicate drilling fluid which comprises fresh water bentonite slurry 25 parts, seawater 75 parts, filtration-loss-reducing agent 2.0 to 5.0 parts, potassium chloride 5 to 7 parts, lubricant 1 to 2 parts, stabilizer 2 to 4 parts, and weighting agent 65 to 70 parts. The drilling fluid has the advantages of (1) good fluidity; (2) good wall building property, low HTHP filtration loss equal to or less than 15 ml, and thin mud cake; (3) high contamination resistance and (3) high poor soil invasion resistance (up to 15%); (4) good inhibition and large cuttings roller recovery larger than 85%; and (5) high lubricity and low friction coefficient.

The invention discloses a construction method of a low-clearance swing bridge across an operational line. The construction method comprises the steps of preparing for swing, installing and constructing a swing structure by virtue of the techniques of step-by-step installation and multiple pouring, performing beam body construction, performing a balance weighing test and trial swing construction, allowing formal swing to be in place, and using a steel shell method to perform the construction of an ultra-low-clearance closure segment. The construction method of the low-clearance swing bridge across the operational line adopts a spherical hinge multistep installation precise control technique, a balance weighing test pre-weighting technique, a swing parameter correction and precise positioning technique and a closure segment ultra-low-clearance steel shell construction technique to meet specifications, precision of design drawings and quality requirements, and leads the way in swing spherical hinge installation precision, swing balance stability and precision control. The construction method solves the difficult problem of insufficient clearance under the bottom of the bridge, and ensures the safety of the operational line.

The invention provides an oil-base illegal cooking oil lubricant for drilling fluids, which comprises the following components in percentage by weight: 90-95% of illegal cooking oil, 0.1-0.15% of preservative, 0.5-1% of antioxidant, 5-7% of extreme-pressure additive, 0.1-0.15% of ultraviolet absorbent and 0.5-1% of pour-point depressant. The oil-base illegal cooking oil lubricant for drilling fluids is developed by using the illegal cooking oil as the base raw oil. The lubricant has the advantages of favorable water solubility, high stability, low fluorescence and no influence on geological logging, effectively solves the problem that the lubrication lowers the torque and friction resistance in the horizontal well drilling process, provides a brand-new way for recovery and reutilization of illegal cooking oil, has wide and profound social benefits, and has wide prospects for popularization and application.

The ultrahigh molecular weight polyethylene composition capable of being extrusion molded is prepared with ultrahigh molecular weight polyethylene in 10-30 weight portions, composite machining assistant in 1-5 weight portions, antioxidant in 0.1-1 weight portion, nucleating agent in 0.1-1 weight portion, and lubricating agent in 0.1-1 weight portion, and through mixing inside a high speed mixer at 70-90 deg.c for 2-5 min and extruding in a double screw extruder at 170-220 deg.c. The ultrahigh molecular weight polyethylene composition has improved machining performance.

The invention provides a deep geothermal exploitation method based on a carbon dioxide medium. The deep geothermal exploitation method comprises the following steps that S1, an injection well and a production well are drilled; S2, the injection well and the production well are fractured; S3, CO2 fracturing is carried out; S4, CO2 heat energy utilization is carried out; S5, cyclic utilization of CO2 is carried out; and S6, CO2 storage is carried out. The method is advantaged in that CO2 is adopted as a fracturing medium and a heat exchange medium, pressure loss and fracturing difficulty in the flowing process of fracturing fluid can be reduced by taking CO2 as the fracturing medium, the heat exchange area of a heat storage stratum can be increased, intercommunication of a micro-fracture network system is promoted, and the reservoir transformation time is saved; meanwhile, CO2 serves as a heat exchange medium, the heat extraction capacity of a heat storage stratum can be improved, a large amount of CO2 can be stored in the underground deep part in the heat exchange process and after heat exchange, and carbon peak reaching and carbon neutralization can be achieved easily.

The invention provides a steel anchor beam without corbels. The steel anchor beam without the corbels comprises end supports (1), a middle balance beam (2) and stay cable anchoring heads (3). The end supports (1) are connected with tower walls (4) through shear studs (15) or PBL shear keys (16), and the end supports (1) are connected with a web (5) and top plates (6) of the middle balance beam (2) through high-strength bolts. The stay cable anchoring heads (3) are symmetrically arranged on a bottom plate (7) located on the inner sides of the two ends of the web (5) of the middle balance beam (2), and under-anchor #-shaped plates (10) of the stay cable anchoring heads (3) are connected with the web (5), the top plates (6) and the bottom plate (7) of the middle balance beam (2). The steel anchor beam without the corbels has the advantages that the overall height of the steel anchor beam structure is reduced; when a stay cable is tensioned, the middle balance beam slides on connecting bolt hole positions in a self-adaptive mode in the cable force direction, constraint in the horizontal direction of the middle balance beam is released, so that deformation is generated, and the middle balance beam bears the horizontal component balance part of the stay cable. According to the steel anchor beam without the corbels, it is guaranteed that the steel anchor beam bears the most horizontal component of the stay cable, the problem of height limit of the steel anchor beam is solved, meanwhile steel consumption is reduced, and therefore the application range of the steel anchor beam is widened.

The invention relates to a friction material, a composite brake shoe and a preparation method, and relates to the technical field of brake shoe preparation. The friction material comprises the following raw materials in parts by weight: 25-30 parts of steel fibers, 5-8 parts of boron-modified phenolic resin, 10-15 parts of phenolic resin, 3-5 parts of nitrile rubber, 10-15 parts of graphite, 5-10parts of glass fibers, 5-10 parts of basalt fibers, 2-5 parts of barite, 1-2 parts of aramid fibers, 15-20 parts of calcium hydroxide, 1-2 parts of silicon carbide and 2-5 parts of aluminum oxide. With the proportion of the metal content in the formula and the synergistic effect of the raw materials, the hardness of the friction material is increased, the friction coefficient is reduced, the elasticity modulus is increased and the heat resistance is enhanced. The brake shoe prepared from the friction material has the characteristics of good heat resistance, low and stable friction coefficientand good impact resistance effect and can prevent transfer, adhesion, damage and scratch of the base material during braking of the brake shoe and can overcome the defects of brake shoe chipping/cracking, metal inserts and the like generated during frequent braking of large-scale road maintenance machinery.

The invention relates to a measuring system for internal displacement of a rock and earth mass. The measuring system comprises a measuring unit, wherein the measuring unit sends a signal to a data acquisition unit connected with terminal equipment, and comprises an anchoring head; the anchoring head is connected with a grating scale through an alloy wire; and the grating scale is connected with the data acquisition unit. The anchoring head buried in a rock and soil medium is small in size and light in weight, is closely jointed with the rock and earth medium, and generates same displacement with a surrounding medium in the same direction; the alloy wire is small in deformation per se, and has a very small coefficient of friction resistance with the medium and a low disturbance to the nature of the rock and earth mass, and the obtained displacement result is closer to the actual value; the minimal measuring unit of the grating scale can reach micrometer level; the data acquisition unit and terminal equipment can automatically acquire, transmit and record the required data; and the system can realize the low-disturbance and high-precision measuring of the internal displacement of the rock and earth mass, and the automatic acquisition, transmission and record of data.

The invention discloses a preparation method of drilling fluid lubricants, and belongs to the technical field of drilling fluid additive preparation. The method includes the steps of firstly, stirring swill-cooked dirty oil and dichloromethane to react, distilling, and heating the obtained resultant and propylene oxide to react; secondly, adding boric acid, carbon tetrachloride and the like to heat and undergo reflux reaction, and filtering to collect filtrate for distilling to obtain modifiers; thirdly, heating and filtering waste rapeseed oil and frying oil and lard, and collecting filtrate to react with zeolite, citric acid and the like; finally, mixing the obtained modified mixed oil with the modifiers, monoethanolamine of coconut oil fatty acid and the like, and then obtaining the drilling fluid lubricants. The drilling fluid lubricants prepared by the preparation method has the advantages of having good functions of anti-high temperature, aging resistance and comprehensive lubricating properties, and being difficult to be decomposed and lose efficacy under high temperature environment, so as to not cause foaming phenomenon of drilling fluid.

The invention relates to a microemulsion type lubricant used for a drilling fluid and a preparing method thereof. The lubricant includes mineral oil or refined gutter oil, a surfactant, an inorganic salt, n-butanol and water. The method includes firstly adding water into a reaction kettle, slowly adding the surfactant into the reaction kettle with the stirring speed being 2000-3000 r/min; after the water and the surfactant are fully mixed, slowly adding the inorganic salt; after the inorganic salt is fully dissolved, adding the n-butanol and the mineral oil or refined gutter oil; and allowing the mixture to stand for 5-10 h. The lubricant and the method are advantageous in that industrial production of the lubricant can be achieved and the environment protection problem of the gutter oil is solved; the lubricant has good compatibleness with a water-based drilling fluid, has low influences on rheological properties of the drilling fluid, and can effectively reduce the frictional resistance coefficient and the mud cake adhesion coefficient; and by adding the lubricant into the drilling fluid, the mud cake adhesion coefficient can be effectively reduced. Experiment measurement shows that the highest reduction rate of the mud cake adhesion coefficient is 52.3%.

The invention discloses a stainless steel cold rolling plate machining method. The method comprises the steps of firstly, raw material treatment, secondly, rolling, thirdly, annealing and acid pickling, fourthly grinding and forming and fifthly electrolytic passivation. A stainless steel cold rolling plate manufactured through the machining method is flat in plate face and uniform in color, the surface appearance quality is greatly improved, through the rolling method, the friction coefficient of the cold rolling deformation area contact surface of the stainless steel plate can be reduced, and therefore the cold rolling pressure is reduced, cold rolling production efficiency is improved, and a rolled part easily extends.

The invention relates to a preparation method of a filtration control lubricant used by a high-temperature horizontal well and directional well. In a reaction container, a glycan drilling fluid treatment agent is mixed with water, and then sodium benzoate and hexamethylenetetramine or paraformaldehyde are added; then a plant polyphenol material and lignosulfonate are added into a mixture in the reaction container; finally, a mixture in the reaction container is subjected to vacuum drying and grinding to obtain the filtration control lubricant used by the high-temperature horizontal well and directional well. Vegetable gum adopted in the preparation method is heteropolysaccharide and has a branch structure, so that the filtration control lubricant has a good lubricating effect, and a coefficient of friction resistance of a mud cake is obviously reduced; in addition, the plant polyphenol material is used as an additive of the glycan drilling fluid treatment agent, so that the structure of glycan can be stabilized by intermolecular forces of a hydrogen bond and the like, the glycan drilling fluid treatment agent is difficult to degrade and decompose when the filtration control lubricant is used at a high temperature, and temperature resistance can be improved to 150 DEG C or more.

The invention discloses an anti-impact modified polyvinyl chloride water and sewage drainage pipe. The anti-impact modified polyvinyl chloride water and sewage drainage pipe comprises, by weight, 60-80 parts of PVC, 10-30 parts of anti-impact modifiers, 10-30 parts of toughening modifiers, 3-6 parts of modifiers, 1-3 parts of lubricants, 2-5 parts of coupling agents, 1-5 parts of carbon fibers and0-15 parts of fillers. A processing method includes heating and stirring the PVC for 2 minutes, adding stabilizers, continuing to stir, increasing the mixing temperature to 95-100 DEG C, adding otherauxiliaries (the carbon fibers and the fillers are subjected to surface treatment by the coupling agents), performing mixing and stirring, stopping stirring when the mixing temperature reaches 120-130 DEG C, feeding the mixtures to a cooling stirrer to be stirred and cooled to 40-45 DEG C, discharging the mixtures, and feeding the mixtures to a next step for 4-6 hours of processing. The obtainedpipe has high impact strength, temperature resistance, corrosion resistance and aging resistance.

The invention belongs to the technical field of oil production engineering. An acid and alkali resistant rapid mixing liquid application sample separation device, which comprises a feeding part, a mixing part and a liquid storage sample separation part; the feeding part is used for containing a solution to be mixed; the mixing part is arranged at the bottom of the feeding part and is used for uniformly mixing a to-be-mixed solution; the liquid storage and sample separation part is arranged at the bottom of the mixing part and is used for storing the mixed solution and sampling in groups. The invention further discloses an acid and alkali resistant rapid mixing liquid application sample separation method. The problems of acid-base solution mixing and sample separation can be solved, and static liquid mixing and sample separation are achieved through fluid mechanics. The static liquid mixing and sample separating device is reasonable in overall structural design, can be applied to strongacid or strong base or other liquid with the viscosity smaller than 200 mPa.s, is internally provided with no electronic driving assembly, and achieves static liquid mixing and sample separating by means of the hydromechanics principle.

The invention relates to a plastic liner protruding-type socket steel ring concrete top tube comprising a steel bell, a cylindrical reinforcement frame tube cage and a concrete tube core. The steel bell is fixedly mounted at one end of the concrete tube core, and the cylindrical reinforcement frame tube cage is coaxially embedded in the concrete tube core; a socket steel ring is coaxially fixedly mounted on the outer wall of the socket end of the concrete tube core, the outer wall diameter of the socket steel ring is larger than the socket outer wall diameter of the concrete tube core so as to radially form a groove between a socket of the concrete tube core and the concrete tube core, and a plastic liner cylinder is coaxially fixedly mounted on the inner wall of the concrete tube core. The plastic liner protruding-type socket steel ring concrete top tube has simple structure, scientific and reasonable design, firm socket, better impermeability and corrosion resistance, lower raw material cost and small inside tube wall coefficient of friction resistance.