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An effective way to solve this problem is to develop new plugging materials, which are in the nanometer or micrometer scale.
However, when drilling in the shale formation to obtain shale gas, new plugging materials should be developed.
One effective way to solve the block problem in the drilling of the shale formation is to search and develop the plugging materials with smaller size.
Experimental Materials.
So the sample 3 is probably the best candidate of plugging materials in shale formation.

International Journal of Thermal Sciences, 167, 107036
International Journal of Thermal Sciences 170 (2021): 106966
Materials Today: Proceedings 47 (2021): 2662-2668
International Journal of Thermal Sciences 138 (2019): 75-83
Beni-Suef University Journal of Basic and Applied Sciences 7.1 (2018): 118-126

Materials and methods Hydroxyapatite and titanium powders were the two main starting materials used in the current research.
The inter-comunicating pores should been expected for such materials.
Jose Manuel Torralba from the IMDEA Materials, Univ.
Review Titanium alloys in total joint replacement – a materials science perspective.
Journal of Materials Science: Materials in Medicine. 1995; 6(5):249-257

These procedures were performed in the Laboratory of Materials at UAEMa / UFCG.
Albertson: Polymer Engineering and Science Vol. 38 (1998), p. 1251
Bousmina: Progress in Materials Science Vol. 50 (8) (2005)
Cho and C.S Ha: Journal of Materials Science Vol. 38 (2003), p. 909
Alexandre: Materials Science and Engineering Vol. 28 (2000), p. 1

The observed changes affect the catalytic properties of the materials obtained which was confirmed by the catalytic tests undertaken with CH4.
Introduction Cerium dioxide based materials have been mainly used as catalysts and pigments in ceramics or glasses.
They are also materials of great interest for gas sensor devices.
Munuera, Journal of Catalysis, 195, 207-216, (2000)
[2] A.Trovarelli, Catalysis Review- Science and Engineering, 38, 4,439-520, (1996)

Due to the shortage of wood resource, manufacturers often use the raw materials mixed with softwood and hardwood.
For example, softwood used to be the main raw materials of fiberboard.
However, manufacturers have to mix a certain proportion of hardwood or other materials into the raw materials.
Due to the differences of softwood and hardwood, the manufacturing processes have to be adjusted according to the types and ratio of wood raw materials.
Rapid prediction of wood crystallinity in Pinus elliotii plantation wood by near-infrared spectroscopy[J], Journal of Wood Science, 2007, 53:449–453

Barrozo: Canadian Journal of Chemical Engineering Vol. 89 (2011), p. 655
Damasceno: Materials Science Forum Vol. 416 (2003), p. 317
Barrozo: Materials Science Forum Vols. 591–593 (2008), p. 341
Barrozo: Brazilian Journal of Chemical Engineering Vol. 26 (2009), p. 575
Barrozo: Materials Science Forum Vols 660-661 (2010), p. 525

According to test results of materials, the following material properties are adopted for steel: , ; , , , .
Acknowledgements This research was sponsored by Chinese Natural Science Foundation (Grant No. 50808098), Ningbo Natural Science Foundation (Grant No. 2010A610082) and Ningbo University Science Foundation.
Murty, in: Journal of engineering mechanics.
[3] Li Liming, Chen Yiyi, Li Ning, Cai Yuchun, Journal of Jilin University.
Wang, Fatigue & Fracture of Engineering Materials & Structures.

Proper use of SiO2 as a sintering aid improves the materials properties of the M-type ferrites [8] had been studied intensively, and simultaneous addition of CaO and SiO2 was shown to be very beneficial in tailoring a dense microstructure with relatively small grains [9].
The high-purity reagent grade raw materials SrCO3, Fe2O3, La2O3 and Co3O4 were weighed in the composition ratio of Sr: La: Co: Fe=1-x: x: x: 2n-x, where n=5.8 and the substituted amount x varied from 0 to 0.4 in increments of 0.1.
Mixtures of these materials were wet-mixed by a planetary ball mill in water for 0.5 hour.
Journal of Magnetism and Magnetic Materials. (2004), 272–276 [8] Tsang.
Shiau, The role of silica in sintering barium ferrite, Journal Of Materials Science Letters.(1989), 8:1386-1388 [9] J.

Digital restoration is to acquire information data artifacts form, texture, texture, materials and store it into the computer through some technical measures, uses it as the research data of the corresponding professionals.
Journal of Remote Sensing [4] Shang Tao, Kong Liming.
Journal of Wuhan University (technology version) [5] Fan Shaorong, Zhou Mingquan, Ji Liyan.
Chinese Journal of Chemical Engineering.2002 (1) [7] Li Xiaofeng, Huang Tao.
Building Journal. 2004(2)