Wheel must be used with safety guards. The actual rotational axis of the wheel and its axis of rotation through the center of mass deviation from parallel state called static unbalance wheel. This is usually due wheel uneven density, both ends of the hole and the surface is not parallel or coaxial cylindrical deviation has caused.
2013年10月18日星期五
Using perforating fracturing methods to transform strata, increased gas production
Low-permeability gas widely distributed in China, large reserves, proven gas reservoirs representing more than 80%. However, due to porosity, permeability and pressure is low,
polycrystalline diamond low productivity and economic inefficiency. In order to increase natural gas production, to solve the "gas shortage" problem, now mostly using perforating fracturing methods to transform formation, increased
Diamond blade . However, the conventional way of perforation perforation shallow depth, hole diameter is small, the construction for a long time, can lead to gas
Synthetic diamond , resulting in low permeability gas reservoirs, yield poor. For these reasons, this paper proposes a pulsed abrasive water jet perforation penetration increased permeability gas reservoir to increase natural gas production of new ideas.
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