41results about How to "Cost reduction measures" patented technology

The invention discloses a high-altitude spraying device for a venue type circular stand column . The high-altitude spraying device comprises a supporting mechanism arranged on the stand column in a sleeving mode and sliding downwards relative to the stand column, and a spraying mechanism fixedly connected with the top of the supporting mechanism, arranged on the stand column in a sleeving mode and used for spraying paint to the outer surface of the stand column, and the inner surface of the supporting mechanism makes contact with the outer surface of the stand column. The supporting mechanism drives the spraying mechanism to move downwards and spray the paint to the stand column from top to bottom. Through the arrangement of the supporting mechanism, the circular column can be conveniently sleeved with the supporting mechanism, the supporting mechanism slides down from top to bottom by means of the gravity of the supporting mechanism, the spraying mechanism is located at the top of the supporting mechanism and arranged on the circular column in the sleeving mode, so that the circular column can be conveniently and uniformly sprayed with the paint, the construction efficiency of high-altitude spraying operation is effectively improved, the measure cost is reduced, the construction progress is accelerated, and it is avoided that a supporting structure is erected for manual large-area spraying operation.

The invention discloses a tunnel construction template arch centering trolley guiding rule positioning method, which comprises the following steps: in the advancing direction of a tunnel under tunneling construction, according to the process requirements, parallel position lines needing guiding rules to be installed are symmetrically determined by being parallel to the midline of the tunnel under the tunneling construction; a plurality of steel piles are distributed on the position lines, and are fixedly connected by adopting angle iron, thus forming tunnel construction template arch centering trolley positioning guiding rules; installation calibration contacts are arranged on the left and right sides of a template arch centering trolley; by virtue of the gap between the calibration contacts and the positioning guiding rules, the position of the template arch centering trolley in the tunnel under the tunneling construction is determined. According to the positioning method disclosed by the invention, for dynamic change errors generated after track installation, fixing errors of traveling wheel grooves and balance errors generated by an arch centering trolley mechanism, when the arch centering trolley travels or is fixed, process control and master control can be favorably realized; the travelling dynamic state and positioning in fixation of the arch centering trolley are easily observed and controlled, thus the work efficiency can be improved, and the measure cost is low.

The invention discloses a tunnel construction arch center formwork correcting method. The method comprises the steps that an arch center is moved and positioned in a tunnel; hydraulic electromagnetic combination distribution valves of a pump station provided with an intelligent numerical control computer platform on an arch center bogie are connected with hydraulic jacking oil cylinders respectively; a sensor on each hydraulic jacking oil cylinder is connected with the intelligent numerical control computer platform; a preset extending value and thrust data of each hydraulic jacking oil cylinder are determined and input, the hydraulic pump station is started, and a formwork on the tunnel construction arch center is corrected; after the arch center bogie moves forwards to a next station, the formwork on the tunnel construction arch center is corrected this time according to the data, memorized and stored in a computer, of the previous station. During arch center formwork correction and fixing, process control and master can be achieved for error gaps produced during arch center formwork installation, gap errors of a concrete arch wall which is cast again and comprehensive errors produced during arch center formwork installation, and the accurate control and correction effect on the arch center formwork on the bogie is achieved.

The invention discloses an assembled ultra-deep foundation pit ramp system and a construction method thereof. The system includes ramp structures and vertical support structures. Among them, the ramp structure is composed of the first-level ramp and the second-level ramp connected to the transition platform through rollers and slideways, the first-level ramp and the support beam are connected through pin shafts, and the second-level ramp and the friction plate are connected through rollers and slideways. Connection; the vertical support structure is composed of concrete-filled steel tube columns, stabilizing braces, tie rod jacks, supporting trusses, control lines, jack control boxes, and supporting flanges; the four concrete-filled steel tube columns are fixed by supporting trusses and stabilizing braces, and A rod-type jack propulsion system is set in the support truss to control the transition platform up and down, thereby adjusting the slope of the ramp. The system and method of the present invention avoid problems such as drainage and anti-skid of earthwork slopes in foundation pits, affecting vehicle excavation safety and efficiency, construction progress, and the like, and reduce the cost of slope measures.

The invention discloses an analysis method for influencing factors of complex fracture expansion in the shale fracturing process, which includes the following steps: firstly, analyzing the geological characteristics of the target reservoir; The corresponding solution method calculates the net pressure of different expansion modes, and inverts the fracture parameters under different expansion modes; finally, the fracture extension law and the corresponding pressure under various factors that affect the dynamic expansion of shale fractures Response characteristics were studied to clarify the crack dynamic expansion law and main controlling factors under different construction pressure responses. The present invention can clearly grasp the dynamic expansion behavior of fractures, realize the diagnosis and analysis of different typical construction curves in shale gas fields, and is beneficial to identify various fracturing change events as early as possible, judge the fracture shape trend and construction abnormal points in advance, and adjust fracturing optimization in time Design, avoid ineffective transformation, reduce the cost of measures, thereby improving the quality and effect of fracturing.

The invention provides a cooling type oil-based selective water plugging method. The Cooling type oil-based selective water plugging method comprises the steps that heavy oil is preheated, so that thefluidity of the heavy oil is restored, and the heavy oil is injected into the formation; after squeezing injection of the heavy oil is finished, displacement is conducted with hot water, the heavy oil is totally squeezed into the formation, heat transfer at immediate vicinity of wellbore is conducted with cold water, so that the temperature of the heavy oil is reduced to the turnover temperatureor below, and plugging is formed. The viscosity of the heavy oil in a water layer can keep basically unchanged, while the viscosity and the flowback resistance of the heavy oil in an oil layer are reduced because the heavy oil in the oil layer makes contact with thin oil, and the selective aim of water plugging without oil plugging is achieved. The squeezed crude oil can be slowly produced from the formation finally, and the measure cost is low.

The invention discloses a sealing agent for thermal recovery of heavy oil, which is made of the following raw materials in percentage by weight: 10-30% of water glass, 0.5-3% of ethyl acetate, 0.3-1.3% of ammonium chloride, and 0.005% of aluminum citrate -0.015%, EDTA or EDTA salt 0.01-0.03%, the balance is water. The gelation time of the sealing agent of the present invention is 4-12 hours. After gelling, it can withstand high-temperature steam at 300°C. It can be used in conjunction with the suspended particle type sealing agent, and is used for the implementation of some thermal recovery wells with serious steam channeling. Deep channel sealing can enhance the channel sealing effect; especially it can be used in heavy oil thermal recovery sand control wells, which can directly seal channel in the presence of sand control layers or sand control tools, reducing construction costs and having good results.