33results about How to "Flexible construction method" patented technology

The invention discloses a selective repeated fracturing technology for old wells in oil fields, which is designed for effectively solving the problem of repeated reformation of old wells in oil fields. The technology of the present invention adopts assembling, lowering the pipe string, and dragging the pipe string to complete the perforation operation of the required reformed layer, set the upper and middle packers, carry out the fracturing construction of the lowest newly added layer, unseal and drag The construction is carried out in the technological steps from moving the pipe string to the second newly-increased reconstruction layer. The technology of the invention utilizes hydraulic sand blasting perforation to form large-diameter and deep-penetrating tunnels, which can effectively reduce the fracture pressure, and utilizes the advantages of double-seal and single-clamp fracturing technology to reduce requirements on wellhead matching and casing steel grades. The technical string structure of the invention is simple, the construction method is flexible, the operation is convenient and the efficiency is high, which can effectively solve the problem of repeated reconstruction of old wells in the oil field, and can not only complete the repeated fracturing of the reconstructed section, but also carry out the hole repair of the newly added section Integrated operation with fracturing.

The invention discloses a mounting and construction process of the steel structure workshop sandwich plate outer wall surface. Two electric hoists are mounted on the ground, and a pulley is mounted ona roof for hoisting. Compared with a high-altitude mounting method, the construction method thereof is flexible, convenient to move, fast in construction speed and high in construction efficiency; and meanwhile, compared with a brick outer wall, the construction time is relatively short, the construction speed is fast, the number of construction personnel is less, and after the construction is completed, the outer wall surface has good sealing performance, beautiful appearance, good rigidity, reasonable fastening mode, firm fixing method and good overall image.

The invention belongs to the technical field of national defense engineering protection materials, and especially relates to a dispersion layer composite damping material with vacant-shell foam ceramic balls as aggregate and with a civil air defense command work layered structure. The purpose of the invention is to use a dispersion layer material with large attenuation coefficient, high cost performance and stable performances to substitute sandy soil and other local materials used at present in order to improve the comprehensive protection ability of the layered protection structure. The dispersion layer material is prepared through mixing the vacant-shell foam ceramic balls, highly adhesive and elastic asphalt base and polyphenyl particles according to a certain ratio, and through carrying out compression molding, wherein the vacant-shell foam ceramic balls are a hollow foam ceramic structure, and have the characteristics of high amount of porosity and small density. The cavity diffraction and foam compression destroy energy dissipation of the vacant-shell foam material and the intrinsic damping of the highly adhesive and elastic asphalt base are fully used in the invention, so the attenuation coefficient of the prepared dispersion layer material is 4.2, the density is 0.85g / cm<3>, the wave velocity is 120m / s, and the comprehensive protection ability of the civil air defense command engineering layered structure is greatly improved.

Provided is a mined metro station hole pile construction method. The method comprises the steps of whole support system construction and main body second lining construction; the whole support system construction step comprises the substeps that by utilizing air shafts at the two ends of the station as temporary working wells, four pilot tunnels are transversely dug through a positive step method; upper pilot tunnel side pile and middle column hole digging pile construction is conducted, bored piles are constructed inside an upper layer side pilot tunnel at intervals, and artificial hole digging piles are constructed inside an upper layer middle pilot tunnel at intervals; lower layer pilot tunnel bottom longitudinal beam construction is conducted; upper layer pilot tunnel steel pipe column construction is conducted; side pile crown beam construction is conducted; top longitudinal beam construction is conducted; top arch initial supporting structure construction is conducted; the main body second lining construction step comprises the substeps that soil body excavation is conducted, and station top plate second lining structure construction is conducted; when a soil body is dug to the bottom of a middle plate, middle plate and middle longitudinal beam construction is conducted; when a soil body is dug to the bottom of a base plate, the waterproof base plate is laid, and structure base plate construction is conducted; lower portion side wall construction is conducted when the base plate reaches the set intensity.

The invention discloses a construction method for a chain-lock type ecological block retaining wall. 1. Excavate on the side slope according to the designed excavation line, and stake out the hole positions of the anchor rods to be anchored on the excavation surface; 2. 3. Pouring the foundation of the retaining wall; 4. Place the first layer of chain blocks on the foundation of the retaining wall. The distance between adjacent chain blocks is equal to the width of a block. The holes on the slope of the chain block are aligned with the axis of the anchor rod. Place the first layer of blocks between the adjacent chain blocks to form the first layer of retaining wall; 5. Backfill the first layer of graded gravel behind the first layer of retaining wall, and then cover the channel of the first layer of blocks Fill the planting soil with grass seeds or flower seeds to form the first layer of chain-lock ecological retaining wall; 6. Repeat steps 4 and 5 on the first layer of chain-lock ecological retaining wall to form the second layer of chain lock 7. Repeat steps 4 to 6 until the construction of the entire chain-lock ecological retaining wall is completed. The invention is not limited by the excavation space and has strong adaptability to geological conditions.

The invention discloses a normal-temperature solidification polyurethane elastomer waterproof material and a preparation method thereof. The polyurethane waterproof material comprises a component A and a component B. Proportioning by weight percent, the component A is an isocyanate prepolymer with the content of 4-15% of isocyanic acid radical NCO; the component B comprises 0-65% of polyether glycol with the degree of functionality of 2-3 and the molecular weight of 1,000-5,000, 0.6-1.2% of organic bismuth catalyst, 20-27.5% of polybasic amine, 0-1.3% of antioxidant and 12.5-71.9% of plasticizer. The component A and the component B are mixed according to the weight ratio of 100(60-81); the material obtained by room-temperature solidification has the mechanical properties that the tensile strength is 15-35MPa, the tearing strength is 44-62N / mm, the breaking elongation rate is 405-840%, and the Shao' hardness is 75-90A.

Horizontal well fracture plugging wellbore reconstruction and repeated fracturing method, injecting liquid into the formation until the wellhead injection pressure is greater than the formation closure pressure of the well; injecting fracture sealing particles into the original fracture; injecting cement into the formation; then injecting drillable plugging materials; After the particles and fracture plugging particles are stabilized, drill and grind the drillable plugging material and circulate it out of the ground through liquid; pump the first drillable bridge plug and perforating gun into the first new Control the perforating gun to perforate the fracture position. At the same time, the perforating gun is separated from the first drillable bridge plug, the first drillable bridge plug is set and sealed, and then the perforating gun is pulled out, and then the casing injection pressure cracks, drillable bridge plugs and perforating gun pumps were injected repeatedly to complete all intervals to be reconstructed. The present invention creates a brand-new wellbore by plugging old fractures and filling the unqualified layers with plugging agent and cement, which can effectively prevent tool sand burial caused by communication between the upper and lower layers outside the casing due to poor cementing quality. .

The invention discloses a two-stair five-step excavation construction method for a shallow-buried large-span soft plastic clay tunnel, relates to an excavation construction method for the shallow-buried large-span soft plastic clay tunnel and aims to solve the problems of a large number of working procedures, slow construction process, high cost, frequent disturbance of surrounding rock, large surrounding rock deformation and long inverted arch enclosing time existing in the conventional excavation technology for a soft ground tunnel. The method comprises the following steps of: excavating anupper bench and preserving core soil, namely preserving a soil body along a contour line while excavating by using an excavator, excavating and arranging an expanded arch springing at the position ofthe arch springing; supporting the upper bench, namely enclosing an excavation surface by primarily spraying concrete, arranging an arch springing support cushion, erecting a profile steel lagging jack, laying steel bar net slices, constructing a locking foot anchor pipe and ejecting concrete to designed thickness; excavating and supporting a lower bench in a staggered way, namely excavating leftand right parts in a staggered way, tightly connecting a section steel frame of a side wall with an arch steel frame, constructing a reinforcing mesh and a foot locking anchor pipe and ejecting concrete; excavating core soil; and excavating and supporting an inverted arch. The method is suitable for construction of the shallow-buried large-span soft plastic clay tunnel.

The invention relates to the technical field of underground space construction, and discloses a pipe curtain construction method based on pipe banks. According to the pipe curtain construction method based on the pipe banks, the pipe banks are used as the construction unit and jacked at the same time for constructing a pipe curtain structure, each pipe bank is formed by arranging a set of steel pipes side by side, every two adjacent steel pipes are connected through a connecting component, and the number of the steel pipes in each set is not smaller than two. By adoption of the pipe curtain construction method based on the pipe banks, the construction efficiency is high, the jacking tendency can be controlled highly, jacking deviation can be rectified easily, and the construction precision is high.