稳定地层 [
wěn dìng dì céng]
good ground
- 卵砾石地层是钻探工程中常见的一种典型的不稳定地层。
Gravel strata is a kind of typical instable layer in drilling engineering. - 土工织物包括稳定地层用织物,防水土流失织物,道路用织物以及防潮织物。
Geotextiles include textiles for ground stabilization, erosion control, drainage, asphalt and moisture proofing . - 尤其是不稳定地层,常常靠提高钻井液密度来保证井壁稳定,严重的制约了钻速的提高。
Especially in non resistant strata, in order to keep borehole wall stability we usually raise the drilling fluid density, but it seriously impede the rate of penetration.
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