core barrel

The conventional core inner barrel which unprocessed have crude face and there are mul -steps in the core passage of barrel because the connections of compound ports of inner core barrel that made the core difficult entering barrel in soft formation coring.

常规内岩心筒的内表面未经任何加工，比较粗糙；内筒组合各部件连接使进心管路成多级台阶，所以在松软地层取心极易堵心。

retractable ore barrel

可缩小取出的岩心筒

ball bearing core barrel

滚珠轴承内筒不转的岩心筒

Technique of Putting in Stalk Through Pulling Apart Core in Coring with the Long Core Barrel in Sichuan Hard Rocks

硬地层拨断岩心接单根长筒取心技术

The test and popularization results of the method of putting in stalk through pulling apart core by Using the long core barrel in Sichuan hard rocks are simply presented in this article.

本文简要介绍了拨断岩心接单根方法在四川硬地层长筒取心中的试验和推广效果。

concentric cylinder rheology measurement

同心圆筒流变性测量

concentric cylinder rotation viscometry

同心圆筒旋转式测粘法

Arsenal process

阿塞诺炮筒离心铸造法

centrifugal cylinder screen separator

离心式圆筒筛清选机

Control Study of Central Distance among Head Tubes for Tube-in-tube Multi-flue Chimney

套筒式多管烟囱筒首排烟内筒中心距的控制探讨

Anti-collapse Performances Analysis on Reinforced Concrete Frame-core Structures with Relatively Small Core;

内筒较小的框架—核心筒结构的抗倒塌性能分析

The ConstructionAnalysis of Anti-Well Method Through Falling Soft Rock Section

反井法施工立井井筒过软岩垮落段实践分析

Increasing Blasting Efficiency of Frozen Rock and Speedingup Shaft Construction

提高冻结基岩爆破效率 加快立井井筒施工速度

Using Bedrock Freezing for Safe and Rapid Construction of Large-Diameter Shaft

大直径井筒全井基岩冻结法安全快速施工

The Key Technology of Freezing Repairing Shaft of the 658m Soft Rock Drilling Shaft

658m软岩普通法凿井井筒冻结修复关键技术

The Grouting Technology for Water Plugging in Bedrock Faultage of the Vertical Shaft

浅谈立井井筒基岩段断层带堵水注浆技术

Physical modeling experiment of rock stress distribution and timbering strength for shaft

井筒围岩应力分布及支护强度相似模拟

Stress Analysis of Wellbore Rock Based on Unified Strength Theory

基于统一强度理论的井筒围岩应力分析

Building of Construction Platform for Steel Casing of Bored Piles in Deep Water and Uncovered Rock

深水裸岩河床上钻孔桩护筒施工平台的搭设