40results about How to "Simplify on-site construction process" patented technology

The invention belongs to the technical field of oil-gas field fracturing production-increase propping agent preparation, and relates to a water acid-sensitivity deformation magnetic tracer function self-suspension propping agent and a preparation method thereof. The propping agent comprises an aggregate and a surface hydration layer, wherein the aggregate is one of magnetic rare earth composite resin, quartz sand or ceramsite and like material; the surface hydration layer is composed of three layers, the innermost layer is a cationic macromolecule inner polymer layer or a modifier layer, the middle layer is an anionic macromolecule outer polymer layer, and the outer layer is anti-caking agent. The propping agent has the acid-sensitivity deformation self-suspension function of producing buoyant force while encountering water and breaking gel to precipitate while encountering the acid, and a tracer function of monitoring flow guiding position of the propping agent through electromagnetic imaging; in the process of exerting the fracturing engineering on shale, compact oil-gas or coal bed base and like argillaceous plasticity micronano hole reservoir, the fracturing liquid with the propping agent has excellent flow guiding characters of suspension sand-adding of non-floating to the roof and not sinking to the bottom; the permeation is improved, the hurt is avoided, the propping agent is efficient and capable of increasing production, the construction cost is lowered, and the application prospect is wide.

The invention discloses an efficient wax inhibitor for oilfields. The efficient wax inhibitor, namely an oil-based wax inhibitor, is obtained by compounding of a wax-crystal modifier, a wax-crystal dispersant, a nonionic surfactant and a solvent; the wax-crystal modifier is a mixture of pentabasic copolymers and ethylene-vinyl acetate, and the weight ratio of the pentabasic copolymers to the ethylene-vinyl acetate is 1:2; the efficient wax inhibitor comprises, by weight, 0.5-1.5% of the wax-crystal modifier, 10-30% of the wax-crystal dispersant, namely mahogany petroleum sulfonate, 5-25% of the nonionic surfactant, namely AE-type surfactant or AR-type surfactant, and the balance solvent. The efficient wax inhibitor has the advantages that production cost is reduced greatly, production efficiency is improved, well flushing cycle is prolonged to about 50 days, application effect is good, and average daily incremental oil rate reaches 10%.

The invention discloses an underground reservoir artificial dam body and coal pillar dam body connecting structure and further discloses a construction technology of the underground reservoir artificial dam body and coal pillar dam body connecting structure. The underground reservoir artificial dam body and coal pillar dam body connecting structure comprises an artificial dam body and a coal pillar dam body. A dam body groove is formed in the coal pillar dam body and provided with a groove oblique surface, and an acute angle is formed between the extending directions of the groove oblique surface and the artificial dam body. Anchor rod drill holes are formed in the groove oblique surface, and the extending directions of the anchor rod drill holes are perpendicular to the extending direction of the groove oblique surface. An inverted-hook-type grouted anchor rod is fastened in each anchor rod drill hole, and a plurality of reinforcement framework beams are arranged in the artificial dambody. The two ends of each reinforcement framework beam are in fastening connection with the ends of the inverted-hook-type grouted anchor rods on the two sides of the reinforcement framework beam correspondingly. According to the underground reservoir artificial dam body and coal pillar dam body connecting structure and the construction technology thereof, the connecting strength and stability are improved, and the construction technology is further simplified.

The invention discloses a high temperature-resistant and solid-free micro-foam drilling fluid or completion fluid. The drilling fluid is prepared from the following raw materials by weight: (1) 0.5-1 part of a high temperature-resistant tackifier; (2) 0.5-1 part of a high temperature-resistant foaming agent; (3) 0.2-0.3 part of a high temperature-resistant protective agent; (4) 2-3 parts of a high temperature-resistant fluid loss additive; (5) 0.6-1 part of a high temperature-resistant flow type conditioning agent; (6) 0.2-0.3 part of soda ash; and (7) 100 parts of water. The preparation method includes: adding the above (1)-(6) components into the component (7) according to the content sequentially under the conditions of normal pressure and temperature and mechanical stirring in a usual way, and then conducting stirring for 2-6h. The drilling fluid or completion fluid provided by the invention has the advantages of excellent rheological properties, good fluid loss reducing performance, good stability and high temperature resistant ability, and can be applied to well drilling or completion construction in high temperature, low pressure and likely leaking stratums.

The invention discloses a hypersalinity solid-free micro-foam drilling fluid or completion fluid. The drilling fluid is prepared from the following raw materials in parts by weight: (1) 0.3-0.6 parts of a tackifier, (2) 0.3-0.5 parts of a foam stabilizing agent, (3) 0.7-1.1 parts of a foaming agent, (4) 2-3 parts of a filtrate reducer, (5) 0.3-0.5 parts of a flow-pattern adjusting agent, (6) 0.2-0.3 parts of sodium carbonate and (7) 100 parts of a base fluid. The preparation method comprises: successively adding the compositions (1)-(6) according to the weight ratio into the composition (7) under the conditions of normal temperature, normal pressure and mechanical stirring in a routine manner, and stirring for 2-6 h after all compositions are added. The related hypersalinity solid-free micro-foam drilling fluid or completion fluid has excellent rheological performance, relatively good filtrate reducing performance and relatively good stability, and is applicable to well-drilling or well-completion construction of high-salinity (salt bed), low-pressure and easily-leaked stratums.

The invention discloses a pressure-control drilling system utilizing an automatic shunt manifold for pressure-control drilling and a corresponding pressure-control drilling method. The pressure-control drilling system comprises a drilling spool, a rotary control head, a drilling column, an automatic shunt manifold, an automatic throttle manifold and a throttle manifold; the drilling spool, the rotary control head and the drilling column are arranged at a wellhead at the upper part of a mineshaft; and the automatic shunt manifold, the automatic throttle manifold and the throttle manifold respectively communicate with the drilling column, a by-pass pipeline of the rotary control head and a by-pass pipeline in the blowout direction of the drilling spool. Due to the arrangement ways of all the manifolds and the mutual opening/closing matching between hydromatic valves and check valves arranged on all the manifolds and the utilization of a drilling fluid pump equipped for a drilling crew at present, the pressure-control drilling operation is realized; and through controlling the automatic shunt manifold for pressure-control drilling in connection making and tripping processes, the fluctuation of bottom hole pressure can be reduced, the control capacity for the bottom hole pressure can be improved, the no-drilling time can be shortened, the drilling cost can be reduced, and the operation incapability caused by a fault of a pressure return pump can be avoided.

The invention relates to a fracturing fluid resistance reducing agent for development of crude oil in low-permeability reservoirs, in particular to an emulsion type fracturing fluid resistance reducing agent and a preparation method thereof. The method comprises the following steps: mixing acrylamide, hydroxyethyl methylacrylate, 2-hydroxypropyl methacrylate, urea and ethylenediamine tetraacetic acid disodium salt, dissolving the formed mixture in water, and regulating a pH value with a sodium hydroxide solution to form a water phase; mixing ethyl distearate-based hydroxyethyl methylammonium methylsulfate with solvent oil to form an oil phase; and subjecting the water phase and the oil phase to mixing and heating, introducing nitrogen, and adding a water-soluble initiator for polymerization so as to form the emulsion type fracturing fluid resistance reducing agent. The resistance reducing agent has the advantages that production time is short, production process is greatly simplified,and production cost is reduced; good mineralization resistance is achieved, and e salt tolerance reaches 120000 mg/L or above; and meanwhile, the friction resistance of a fracturing fluid can be effectively reduced at low concentration, and a resistance reduction rate reaches 90% or above when the concentration of the resistance reducing agent is 500 ppm.

The invention relates to a repairing coating, solving the problem that an ordinary repairing method is low in on-site repairing quality. The repairing coating comprises base stock and a curing agent, wherein the base stock mainly comprises the following ingredients: liquid state bisphenol A, F epoxy resin, thixotropic agent, toughening agent, filler, pigment and the like; a liquid state amine type curing agent is used as the curing agent, and the use proportioning of the base stock and the curing agent is 100:23. The repairing coating is used for repairing pipes; the combination strength of a combination plane of the repairing material and a 3PE (Poly Ethylene) erosion resistant layer of a pipeline main body can meet the requirements on repairing standard of a 3PE pipeline; and moreover, the on-site engineering process is simple, the mechanization can be realized, the influence of artificial and environment factors on the engineering is reduced, and the repairing coating can be brushed and coated at low temperature of -5 DEG C.

The invention provides a prefabricated installation anchoring system and method for a road toll island, wherein the system comprises a plurality of toll island unit concrete prefabricated components;each toll island unit concrete prefabricated component is anchored to a road surface through an anchoring installation unit (5); and each toll island unit concrete prefabricated component comprises atoll island head concrete prefabricated component (1), a toll island tail concrete prefabricated component (2), a toll booth foundation concrete prefabricated component (3) and a plurality of toll island body standard section concrete prefabricated components (4). The system has the advantages that (1) the prefabricated components are quickly installed on site, so that the site construction periodof the toll island is greatly shortened; (2) the prefabricated components of the toll island are prefabricated and maintained on a uniform mold in a factory for prefabrication, swelling does not occur, which is beneficial for protection of the finished product, and the construction quality of the concrete components is improved.

The invention discloses a filling paste slurry suitable for a tunnel construction goaf. The filling paste slurry is mainly prepared from a clay mud, a cement and water; the clay mud is prepared by stirring clay and water, a modifier is added in the filling paste slurry, the modifier comprises meta-aluminate and lignosulfonate, the mixing amount of the meta-aluminate is 0.5-1.5% of the mass of the cement, and the mixing amount of the lignosulfonate is 0.2-0.4% of the mass of the cement. The filling paste slurry is high in stone rate, has a good filling effect, and is environmentally friendly, convenient to prepare, and suitable for filling the tunnel construction goaf, the raw materials are cheap and easy to get, the setting time is controllable, the on-site construction operation is simple, and then a tunnel safely goes through the goaf.

The invention relates to the technical field of prefabricated buildings, in particular to a separated precast prestressed concrete slab type stairway and a production process thereof. An existing slabtype stairway is large in dead weight and complicated in production process. The separated precast prestressed concrete slab type stairway comprises a stairway body, wherein the stairway body sequentially comprises an upper platform plate, stair section plates and a lower platform plate from top to bottom; prestressed reinforcing steel bars are arranged on the lower part in the stairway body along the length direction; reserved installation holes and reserved hole reinforcing ribs are respectively arranged on the surfaces of the upper platform plate and the lower platform plate; the stair section plates are provided with hoisting points and demoulding hoisting points; and the prestressed reinforcing steel bars are provided with reserved prestressed reinforcing steel bar plugging slots atreinforcing steel bar outlet holes of flat planels. Compared with a traditional precast stairway, 20 percent of concrete can be saved, 30 percent of reinforcing steel bars can be saved, the dead weight is light, fast production can be realized, and the separated precast prestressed concrete slab type stairway and the production process thereof have a favorable development prospect in the technicalfield of prefabricated buildings.

The invention discloses a PCSC shear joint structure of a plate girder overall assembly type composite beam bridge. A steel beam is provided with a longitudinal side baffle. A precast concrete bridgechannel plate is located behind the steel beam and is located on the top of the longitudinal side baffle. A longitudinal perfusion space is formed between the precast concrete bridge channel plate andthe steel beam. The precast concrete bridge channel plate is fixedly connected with the steel beam by using a shear joint structure in a longitudinal perfusion mode between the precast concrete bridge channel plate and the steel beam. According to the PCSC shear joint structure of the plate girder overall assembly type composite beam bridge, by using pressure perfusion, a longitudinal perfusion space is formed and the longitudinal perfusion space is combined with concrete to form steel-concrete composite beams, and then all the steel-concrete composite beams are pushed to the corresponding bridge piers to be in position in the longitudinal direction, and assembly type combination of an overall precast concrete bridge channel plate unit and an overall steel beam unit is achieved. An assembly type industrialization bridge construction method that the steel-concrete composite beams are constructed in a factory and the fact that all the steel-concrete composite beams are pushed to the corresponding bridge piers to be in position in the longitudinal direction can be achieved. All the advantages of the PCSC shear joint structure are achieved. The three problems of the high working amount of welding on a site, extremely high accuracy requirements of adaptation of manufacture and poor fatigue resistance of inconel weld are overcome.

The invention relates to special mortar for micro pile pouring, and a preparation method and an application thereof. The special mortar material for micro pile pouring is a mixed powder of ordinary Portland cement, quartz sands, a mineral powder or fly ash admixture and additives, the additives comprise a polycarboxylate superplasticizer, an expanding agent, a plastic expanding agent, a defoamingagent and a tackifier, and the tackifier is one or a combination of more of cellulose ether, polysaccharide, polyacrylamide and flaky silicate. The special mortar has the advantages of stability in the pouring process without layering or bleeding, low viscosity after being mixed, good fluidity, easiness in pumping, low air content, guaranteed strength, small shrinkage amount after being cured, suitableness for pouring micro piles, realization of one-time grouting without mortar supplementation, and guaranteeing of the integrity of the pile body. The mortar is not only suitable for the micro pile pouring, but also suitable for grouting construction of large-slenderness-ratio components such as anchor rods and soil nails and structural reinforcement of damaged concrete components, so the mortar has good practical application values.

The invention discloses a stress component, a fiber grating sensor, an intelligent cable and a manufacturing method. The stress component comprises a measuring segment used for being deformed same asa to-be-tested component, a groove for containing fiber gratings is formed in the measuring segment and extends in the stress direction of the to-be-tested component, and fixing parts for fixing the fiber gratings are further arranged at both ends of the measuring segment. Since the groove is formed in the measuring segment of the stress component and extends in the stress direction of the to-be-tested component, when the fiber gratings are placed in the groove, the groove can position the fiber gratings; at the same time, the groove increases the contact area between the fiber gratings and the measuring segment, and by combining with the fixing parts at both ends of the measuring segment for fixes pigtails at both ends of the fiber gratings, an integral structure is formed. The stress component facilitates installation and connection of the fiber gratings. Moreover, the fiber gratings can be better protected, and damage of the fiber gratings is avoided.