The conventional gravel packing usually takes a long period of time, and can not implement internal circulation under high pressures.
针对普通砾石充填占井周期长、封隔高压砾石充填无法内循环的不足,研究了封隔循环一体化砰石充填防砂技术,介绍了其基本原理、方法、特点和适用范围。
down-facing packer cup
开口朝下的封隔皮碗
downward-looking cup-type packer
开口朝下的皮碗封隔器
cup type retrievable packer
皮碗式可回收封隔器
The device is placed top down on the decapsulation head.
需开封的器件正面朝下放在腐蚀头上。
First, take the plastic bag and turn it upside down.
首先，把塑胶袋的开口朝下。
gravel pack straddle too
砾石充填对口皮碗工具
Efficacy of VSD Occluder via Lower Ministernotomy:Short-term Evaluation
经胸骨下段小切口行室间隔封堵的近期疗效评价
The cover of the parcel won't tear.
这包裹的封皮撕不开。
The skin-dealer sat there eating until the servants came to clear the table.
而皮贩，却吃到最后，用人来收拾羹碗了，他才离开了桌，走到廊下的黑暗处。
screw casing anchor packer
用螺纹装置撑开及收缩的套管封隔器
Design of straight separate switch in close assemble electric appliances;
封闭组合电器中直线隔离开关的设计
Software Developed for Simulating Working Behavior of Packer System
封隔器系统工作行为仿真软件的开发
Molten lava cooled and sealed up the bottom, forming a huge bowl-shaped crater.
熔岩冷却后封住了火山底，因而形成了一个大型的碗状火山口。
The flap of the envelope has come unstuck
这信封的口没粘牢，开了。
The seal on the jar was broken.
瓶的封口被打开了。
Galvanic Corrosion Research of Production Tubing, Production Casing and Packer Materials in Packer Fluid;
油套管及封隔器用钢在封隔液环境下的电偶腐蚀行为研究
On the Fights between Mid-Lowerclass Women and the Feudalistic Autocracy in Qing Dynasty;
论清朝中下层妇女与封建专制的抗争
A local carpenter had made the box to her design, out of walnut, with dusty seals and padded interior sections.
匣子是当地一个木匠根据她的设计做的,胡桃木加防尘封口,里面用软垫隔开。