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Wellbore integrity failure may be a result of one or more factors.
Irregularity hole sizes is one of complex situation caused by sidewall destabilization, it has many reasons, such as natural factors and human factors.
From the mechanical perspective, the main reasons of overcut and hole collapse is the lower effective fluid column pressure, which resulting in shear failure, due to the stress suffered by the rock of sidewall exceed the strength of the rock; From the chemical perspective, sidewall destabilization is mainly related to the matching of formation properties and drilling fluid system.
Aims at carried out a comprehensive and integrated management to all the factors affecting the well integrity in the whole process.
New Method for Determining Downhole Properties that Affect Gas Migration and Annular Sealing.

Research on the Synthetic of Silicone Emulsion Rui Mu1,a,Cuihua Ji1,b 1School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang, 110159, China amuruisy@163.com, bjchzls20050502@126.com Keywords: Organosilicon, Silicone emulsion,Emulsion polymerization, release agents Abstract: This study synthesized silicon emulsions by emulsion polymerization, mainly focused on how influencing factors including catalyst, emulsifier, reaction temperature and synthesis process could affect product conversion rate, appearance and molecular weight.
As no standard proportionality constant K and the expansion factor α is available for query after dissolving silicone polymer in tetrahydrofuran, the measured viscosity value of DY-V401 straight-chain vinyl silicone oil (= 1500) and dimethyl silicone oil (= 15000),whose relative molecular mass are known, could be applied to calculate out that proportionality constant K = 4.738 × 10-3 and the expansion factor α = 0.9687.
Excessive amount of emulsifier would create negative effect on water resistance, isolating properties and mechanical properties.
Excessive amount of emulsifier might generate negative influence on the reaction process and product properties.
Silicone-polyacrylate composite latex particles Particles formation and film properties[J].

Experimental Procedure 2.1 Materials and specimens The material used in our experiment was SNCM-8, special steel used in mechanical structures, and its chemical components and mechanical properties are presented in Table 1 and 2, respectively.
After the CT specimen was nitrified, notches were made on it so that the nitride layer affects not from the stage of crack occurrence but from the stage of crack growth.
Table Table Table Table 2222 Mechanical properties of SNCM Ultimate strength(MPa) Yield strength(MPa) Elongation δ (%) Vickers hardness (Hv) 736 590 14 270 Fig. 1 Dimensions of CT specimen Fig. 2 Shape of fluidized bed furnace 2.2 Nitrogenation using a fluidized bed furnace In our experiment, nitrogenation was carried out using a self-developed fluidized bed furnace, the unit processing price of which is much lower than that of a vacuum furnace while producing the same effect.
The width of stress-intensify factor (Δ K) was calculated using the equation below.
[2] H.G.Kim, T.Y.Chung "Challengers for the Next Century" Journal of the Korean Society for Heat Treatment, Vol. 12, No. 3 (1999), pp. 270-278 [3] M.G.Kim, S.H.Lee, D.J.Shin " Fatigue Properties of Nitrided Steel and Titanium through the Comparison of Fracture Mechanism " Journal of the Korean institute of metals and materials, Vol. 40, No. 6 (2002), pp. 661-666

Energy efficient building in the United Kingdom in the technical measures three main areas: 1) use of structural measures to raise the walls, roof and windows of the thermal insulation properties; 2) the use of solar energy; 3) improving the heating system.
Community planning, the district's location, residential building orientation, spacing, height, body type, and district road network structure, greening the environment will affect the district's sunshine, ventilation and climate environment and thus affect the energy consumption of residential buildings.
Community greening and water can effectively reduce the temperature, humidity, wind wind, improving the ventilation quality, thus inhibiting production of heat island effect and improve the structure of residential buildings outside the maintenance of thermal properties.
The sun through the windows of the incident to the indoor heat whose value is the size of the addition to the orientation of windows, size, location and other factors, the availability of shade facilities and there is a great relationship.
Stairwells should use a good thermal insulation property of windows and doors, the open-closed stairwells instead.

However, all three factors were found statistically significant in the production of nano-scale fibers.
Introduction The market for carbon fibers is dominated by fibers made from polyacrylonitrile (PAN) due to their combination of good mechanical properties (high-strength, low-density composite materials and high break strength (particularly tensile strength, and reasonable cost).
This approach enables experimental investigation of the individual factors and the interactions of the factors (variables or parameters) simultaneously.
It can be used for studying the effect of several factors at different level and their influence on each other.
The drastically contact angle value was achived using highest value of both factors of 19 wt.% and 15 cm, respectively.

The Role of Low Temperature on Mechanical and Fatigue Properties of Different Alloys F.
At each temperature, mechanical properties, σy, σu, E, εr, impact energy absorption curves, and some fatigue properties such as the initiation life, Ni, total life, Nf, and propagation life, Np, as well as the shape of the propagation curve, da/dN-Kmax (Kmax maximum stress intensity factor) were assessed.
This is true for almost all mechanical and fatigue properties in different materials.
Mechanical properties are listed in table 1 and Fig. 1.
The same tendency occurs for general mechanical properties.

The influences of factors on silicon rubber performance were investigated such as raw rubber dosage, thermal-resistant additive dosage and process conditions.
Effects of vinyl content on the properties of addition silicone rubber.
Properties and research progress of silicone rubber.
Research progress of aging properties of silicone rubber.
Regulai bimodal polydimetyhlsiloxane networks. e-lastomeric properties of the tetrafunctional networks.

It is essential that responsible engineers have at their disposal the means to verify that the affected structures retain an acceptable margin of safety.
Corrosion may affect residual capacity of the concrete structures through four mechanisms, including change of reinforcement mechanical properties, loss of reinforcement section, loss of concrete section and a reduction in bond between reinforcement and concrete.
Because all investigations [2-6] verified that the dominant factor governing the corrosion-damaged beams failure was the fatigue fracture of the reinforcement, this paper reports a study into the effects of corrosion on fatigue property of reinforcement conducted through physical testes in which corrosion was accelerated by means of anodic polarization.
For higher degrees of corrosion, the pits did not significantly increase in depth, thus the stress concentration factor at the ribs would not significantly change.
Workshop on Durability of Reinforced Concrete under Combined Mechanical and Climatic Loads(CMCL) Qingdao, China, Oct. 2005, pp.207�212

The purity and particle size of the source material are important factors for single crystal growth to obtain good quality of AlN single crystal.
Introduction Aluminum Nitride (AlN) has been developed for its physical properties such as good mechanical strength, high thermal conductivity, large band gap and high electrical resistivity etc.
(Fig. 1b) The cyclic heat treatment didn’t affect just on the growth of the particle.
The cyclic heat treatment didn’t affect just on the growth of the particle.
The AlN powder could grow up to 30 μm largely by sublimation and recrystallization process, while heating at constant temperature could affect only on growing the cluster size.

Accuracy of shape dimension is derived from a number of factors such as the rigidity of the machine itself, the interaction between stiffness and machine-tool, the temperature at the incision site (i.e. dilatation effects of heat).
The technology directly affects the subsurface layer of workpiece (temperature, chemical reactions, cutting forces, etc.).
Mechanical properties of steel C45 is shown in following table (Tab.3).
Table 2 Chemical composition of steel C45 Chemical element C Mn Si Cr Ni Cu P S % ratio 0,51 0,69 0,25 0,15 0 0,12 0,023 0,017 Table 3 Mechanical properties of steel C45 Name Signification and unit Value Yield stress Rp [MPa] 350 Yield strength Rm [MPa] 630 Ductility A [%] 19 Hardness HB 225 Tensile module E [GPa] 211 Surface components were milled on two crossings with cooling, because of insufficient diameter of tool (diameter D = 63 mm, 6 teeth).
Conductive electromagnetic material properties are dependent on the type of material, its density, specific conductance, etc.