The input power of cell phone blocker is DC 5 volt 10A

Huang Lixin, et al (2001) proposed the more dense cake inside and outside, the more you can effectively prevent the intrusion of solid and liquid phases. Gu Jun, et al (2002, 2003) to study the crack grout - porosity reservoir damage mechanism to determine the depth of water to adapt to a variety of recipes and mud cracks temporary blocking agent. Kang Jian and perseverance et al (2004) proposed the flowback process, there is a breakthrough pressure Pd, only exceeded the breakthrough pressure, the back row can take place. To carbonate reservoirs in northeastern Sichuan, for example, the study area is the main type of intergranular pore solution pores, intergranular solution pores and cavities, horizontal joints are more common, the average width of cracks in the width of the distribution range of 3? M ~ 50? m. The application of cell phone jammer includes conference rooms and offices.In this paper, experimental methods, taking into account different crack width and crack pressure - pore reservoirs temporary blocking, temporary blocking of drilling fluid pressure and the rational is the crack width in the different conditions of temporary blocking effect, for the effective application temporary blocking protection technology provides a reasonable basis. Experimental rock samples for the North East Sichuan and Changxing Yanyan heart Feixianguan carbonate rock sample are artificial joints, seam is parallel to the axis of a single rock sample cracks, seam-free filling. Do all the rock samples are vacuum saturated before the experiment the formation water 48 hours. The general performance of mud and rock samples of physical parameters in Table 1 and 2. Experiments using CWCTacid-I-type high-temperature high-pressure dynamic damage assessment instrument (schematic in Figure 1), for different crack width and pressure of the rock samples temporary blocking, back row, and shielding ring strength test. Libraries and schools need use of cell phone jammer .The measuring parameters of the evaluation are: (1) Temperature: room temperature ~ 200 ° C ± 2; (2) confining pressure: 2MPa ~ 50MPa ± 5%; (3) slurry circulation flow rate: 0 ~ 20l/min; (4) column plug-like core: diameter of 2.54cm, length 2 ~ 8cm; repeated measurement error ≤ ± 5%. And drilling and completion operations can simulate solid and liquid mud core relative to the dynamic synthesis of the damage. Slit width and the pressure to change the temporary blocking of different experimental crack width of 2.1 temporary blocking experiments 2.1.1 temporary blocking and back row of experimental procedures (1) the initial positive test rock samples of formation water permeability Kw; (2 ) in the positive pressure of 3.5MPa, confining pressure 7.5MPa, the temperature of 80 ℃ with mud reverse damage to the rock sample 60min, measurement of the cumulative filtrate volume; (3) testing positive after the damage formation water permeability of the rock sample Kw1; (3) calculate the permeability recovery value KW1/KW. cell phone jammer can be applied to restaurants and high security premises that should be free from the cell phone communication. 2.1.2 shielding ring strength test step (1) experimental operation with 2.1.1 (1) - (2) (2) determination of core formation water reverse filtration, positive air pressure by; times increased to 5 MPa, 7 MPa, 10 MPa, 12 Mpa and 15 Mpa, and measure out 10 minutes of positive pressure filtration volume, calculate the core permeability and cake Ki temporary blocking rate of Zd = (Kw-Ki) / Kw × 100%. 2.2 The temporary blocking of different pressure experiments 2.2.1 temporary blocking and anti-handling test step (2) in the positive pressure of 1MPa, confining pressure 7.5MPa, using warm (1) the initial positive test strata of rock samples water permeability Kw; degrees 80 ℃ reverse damage to rock-like mud 60min, measurement of the cumulative filtrate volume; 2.1.1 above experimental steps (3) (3); (4) (4) Repeat (2) and (3 ), followed by pressure change 2MPa, 3 Mpa and 4MPa. The input power of cell phone blocker is DC 5 volt 10A.3 Experimental results and analysis of the crack width of the temporary blocking of different experimental crack width of 3.1 temporary blocking Experiment 3 crack width rock samples were 10? M, 20? M and 50? M, temporary blocking the formation of filter cake.