Application and innovation of subsea wellhead tieback technology in marginal oilfield development

水下井口 回 接工艺在边际油田开发中的应用及改进

Application of prestress tieback and concrete wall in the foundation pit excavation Analysis of the Reasons on Gunite Lining Failure During Drift Excavation and the Preventive Measures

预应力 锚 板墙支护技术在深基坑开挖中的应用 锚喷支护巷道崩壳开裂原因分析及预防实践

Casing tieback is a special technology usually used in offshore drilling .

套管 回 接技术为海洋石油钻井 工程的一项特殊钻井工艺技术。

The monitoring of tieback prestress and its existing problems are discussed for foundation pit protection at Dongfang Square Beijing and the problems in the tensile such as the loss of prestress bias in loading are explained .

对北京东方广场基坑支护中 锚杆预应力的监测及其所出现的问题进行了分析，说明张拉过程中所存在的问题（预应力损失、偏心荷载等）。

E. because the serious casing wear problem was always encountered in the process of operating through the patching tieback and replacement of the casing and protecting the casing against wear it was ensured to run the 244 mm casing to the designed setting depth ;

在施工过程中遇到了严重的套管磨损问题，通过修补 回 接更换部分套管和对套管进行保护，保证了 244mm套管下到设计井深；

New liner tieback cementing technology in high-pressure gas-oil wells

高压油气井尾管 回 接固井新技术

In this paper design methods of over 15 meter height reinforced earth structures are researched based on the measure in full-scale test and the simplified failure plane is presented for reinforced earth structure with tieback breast beams .

本文通过对 实际 工程 的 力学测试分析，探讨了15米以上加筋土构筑物的设计方法，并提出了一个具有 锚 定 系 胸墙的加筋土简化破裂面。

Monitoring of Tieback Prestress at Dongfang Square Beijing

北京东方广场 锚杆预应力监测

The operation has been completed done successfully by improving the tieback procedure that is the grind shoe is utilized to mill cut the 244.5 mm casing and connection part of hanger then the casing is pulled out .

改进重回 接工艺后，用磨鞋磨掉了 244.5mm套管和套管挂的连接部分，起出了244.5mm套管，完成了重回接作业。

In the operation process the tool matching preparation the technology of casing cutting and milling and the casing tieback are researched .

在 取 换套管施工过程中，对工具的配套准备、套管割铣工艺及套 等 回 接技术 等进行了应用研究， 取得了 良好 的 效果。

The tie-back assembly is a special cementing tool for tieback operation .

与回接筒配套用于回接尾管的一种专用 固井工具。

Experimental study on mechanism of pull - out resistance of belled tieback

扩 底土 锚抗拔 承载机理的试验研究

Main tieback stem is protected by injecting ethylene glycol into wellhead .

回 接主 管道通过在井口注入乙二醇进行保护。

This paper introduces the procedure mechanism and operation of wellhead tieback techniques and points out the problems necessary to be solved .

本文介绍了 井口 回 接 作业的程序、机理、作业施工 情况，并指出了需改进的 地方。

How to protect the integrity of the rocks around the tunnel tieback is a crucial construction control point .

如何保护隧道 式 锚 碇周围围岩的完整性是一项很关键的施工控制要点。

Design and Mechanical Analysis of Multilateral Well Tieback and Deflector Equipments

分支井 回 接 重 入装置设计及力学分析