The purpose of perforation is penetrating the casing tube, cement sheath and a certain depth of the formation and forming unhindered channels for oil and gas flowing into the well casing.

射孔目的就是射穿套管、水泥环和地层内一定的深度，为地层的油气流入至井筒，形成一个顺畅的通道。

The new system has realized the communication and control for different kinds of computers. And the production capability of seamless oil casing tube with high additional value has improved greatly.

改造后的计算机系统顺利实现异种机之间的通讯和控制，大幅度提高了高附近加值无缝石油套管的的生产能力。

Silicone rubber tube glass fiber casing, is woven E-glass fiber tube, coated with high temperature silicone rubber is made.

硅橡胶管玻璃纤维套管，是由无碱玻璃纤维编织成管后，涂以硅橡胶高温处理而成。

Adding modified silicate nanometric powders to HDPP and PVC cases as casing material for optical fiber tube can significantly improve its performance.

研究表明，改性后的硅酸盐矿物纳米-微米粉作为填料对光纤护套管（HDPP）和管（PVC）的性能有较大影响。

Thee main products are: all kinds of diamond drill bits, PDC bits, casing boots, reaming, single and double tube wireline coring drilling, coring drill pipe, casing and other drilling tools.

主要产品有：各类金刚石钻头、复合片钻头、套管靴子、扩孔器、单双管绳索取芯钻具、绳索取芯钻杆、套管及其它钻探工具。