Aiming at the problems of large amount of oilfield waterflooding technology, long measuring and adjusting period, low precision of measuring and measuring, and severe influence of well inclination, the mechanical stratified water injection technology is studied. The technology for the first time adopts hydraulic machinery style control, and integrates intelligent downhole monitoring, automatic tool control and other characteristics, to achieve a real⁃time monitoring, on⁃line measurement functions. The successful application of this technology in Well X6, an oil field in Bohai sea in June 2017 shows that the stratified water injection tool has reliable performance, on⁃line real⁃time measurement and adjustment, and improves the measuring and adjusting efficiency. It can be applied to acidizing operations, interwell tracer and other operations, and provides a new technical idea for stratified water injection development technology in Bohai oilfield.

Aiming at the demanding requirements of sealing performance in ultra⁃deep oil and gas wells, a double main sealing structure consisting of conical surface to conical surface and cylindrical surface to spherical surface was designed based on the special thread sealing mechanism. Using numerical simulation method, the changes of contact stress and the contact length of the sealing surface under the four conditions of tensile, compression, tension and internal pressure, tension and internal and external pressures were analyzed. The sealing performance of threaded joints under the ultimate load was studied, and the change rule of sealing capacity with different loads was obtained. The full⁃scale test results show that the sealing performance of the double main seal premium threaded joint meets the application requirements.

The two zones of water injection after X well repair in Bozhong 25⁃1 oilfield are confronted with two major problems. First, the injection pressure difference between two layers is 18 MPa, and secondly, the application of steel wire or coiled tubing is used to replace the horizon. The operation cycle is long and the cost is high. In order to solve the above problem, a new type of non⁃throwing fishing periodic water injection technology is applied, and the underground water injection level and water injection volume are adjusted by surface hydraulic control. The optimum design of sand control pipe string and water injection pipe string is matched to replace repeated steel wire operation. The problem has been solved, which guarantees the safety of water injection operation in high pressure differential layer, and saves 100% of the time and cost of steel wire allocation.

To the batch transportation of cool and hot crude oil, the total cost of transporting oil consists of fuel cost of fire furnace and power consumption cost of oil pump. It is very important to make the total consumption minimal under the premise of accomplishing safely transporting task. Taking the minimal of total energy consumption as the objective function, a batch transportation model of cool and hot crude oil pipeline was set up. The batch transportation in the model was divided into four time stages that unsteady stage of the cold oil head heated, quasi-steady-state stage of the cold oil unheated, unsteady stage of the cold oil end heated and quasi-steady-state phase of the hot oil heated. Two-layer nesting method was used to solve the quasi-steady-state stage; both two-layer nesting method and meeting the pitted in-station temperature of oil head (oil end) were used to select the optimization scheme. Combined the engineering practice, the optimization example of the batch transportation of cool and hot crude oil was given, and the research results can provide a decision-making basic for optimizing transmission of the batch transportation of cool and hot crude oil.

Submicron zeolites FeAlMFI were synthesized by hydrogel constraint synthesis method,with silica sol, ferric nitrate and aluminum sulfate being used as silicon, iron and aluminum sources, respectively, and TPABr as template agent, methyl cellulose as micro-reactor template. The factors that influence particle size were also discussed, such as crystallization time, crystallization temperature and MC. The structure and particle size of samples obtained were characterized by means of XRD, ICP and LPSA. The results indicate that the synthesized zeolite samples are submicron FeAlMFI zeolites, with 100～200 nm particle sizes. The catalytic performance of ZSM-5 and FeAlMFI zeolites was investigated by the methanol-to-olefins reaction. The results of methanol reaction tests show that submicron FeAlMFI zeolite catalyst exhibited a high active stability of methanol conversion and the selectivity to light olefins is increased significantly to 85.9%.

Single stage refining and simulating three stages refining with furfural and N-methyl-2- pyrrolidone were carried out using vacuum gas oil (VGO) blended with Daqing and Shenbei oil as raw material.The optimum operation conditions were determined under the requirement about HVI500SN,and the experimental results were analyzed contrastively.The results show that when NMP refining is compared with furfural refining under the circumstance of the same refining effect,the refining temperature is decreased by 20℃,the mass ratio of solvent to oil is decreased by 40%,and the yield of refined oil is increased by 3% ,which show NMP refining is superior to furfural refining.

A series of 2-substituted-2,3-dihydro-4(1H)-quinazolinones derivatives were synthesized efficiently by the cyclocondensation of 2-anthranilamide with an aldehyde or ketone in the presence of aluminum chloride in water at 60 ℃ after grinding at room temperature. The catalytic activity of different catalysts was compared. The effects of the amount of catalyst and the amount of solvent on the yields were investigated. The results show that the best reaction results could be obtained when the molar ratio of 2-anthranilamide to an aldehyde or ketone is 1∶1, the amount of catalyst is 1% (based on the mole of reactant), and water is 2 mL. The structures of products were characterized by IR, 1H-NMR, mass spectrum and elemental analysis. The probable catalytic mechanism for the reaction was proposed.

２D axisymmetric model of seal structure in compressor for air source heat pump heat unit was established by using nonlinearity finite element theory of large deformation and contact problem．Some typical parameters of the seal structure
which might have the impact on the sealing performance ，such as gap^,s dimension between flanges，chamfer radius of the groove，groove depth and groove width， were analyzed． It is show that the gap between flanges influences the maximum contact pressure and shear stress are very much，groove depth and groove width have a remarkable influence on the maximum
contact pressure and chamfer radius of the groove has a little impact on shear stress.