查询词典 drilling stem

The down-the-hole hammer drilling is to use compressed air as circulation medium substituted conventional mud,has solved problems of coalfield sealed fire area exploration high temperature water burst in boreholes,burnt rock loosen and developed fissures,instable and easy to collapse,broke through low drilling efficiency in hard rocks.

潜孔锤钻进是以压缩空气代替传统的泥浆作为循环介质，解决了煤田火区勘察钻孔中高温水爆、烧变岩疏松裂隙发育、不稳定易坍塌的问题、突破了坚硬岩层硬钻探效率低的难题。

At the beginning, the common small diameter diamond coring drilling is used, but the efficiency is low, the cost is high, and the construction period is long. Subsequently, the hollow-through type DTH hammer drilling technique and continuous coring technology with reverse circulation are adopted to experiment in this mine.

中文摘要：新疆白干湖钨锡矿区自然环境恶劣，地质条件复杂，普通小口径金刚石岩心钻探方法效率低、成本高、施工周期长，后采用贯通式潜孔锤反循环连续取心钻进技术在本矿区进行生产试验。

DTH hammer ; pilot drilling ; hole deviation rate ; horizontal drilling hole

吉林大学；田野潜孔锤；导直钻进；孔斜率；水平钻孔

Drill holes in the drilling carried out, extending, hinge, screw attack when processing fixture as used in drilling jig, also known as Jig.

在钻床上进行孔的钻，扩，铰，攻螺纹加工时所用的夹具称为钻床夹具，又称钻模。

Specifically, the design of the book are fixed jig for radial drilling holes on the processing and set the flange on the fixture for drilling at its fixed level job

具体的说本书设计的是固定式钻模，用于摇臂钻上加工孔系，并且在夹具上设置凸缘，便于将其固定在钻床工作面上。

Based on the analysis of woodworking drilling process,the design plan of a horizontal drilling machine is determined.

通过对木材钻孔工艺的分析，确定卧式木工钻孔机的设计方案。

Main design and production and sales of various agro-drilling machinery, small simple drilling machine!

主要设计生产销售各种农用钻井机械，小型简易钻井机！

During well drilling, LWD monitoring device, comprehensive logging device, cutting logging, seismic interpretation, geologic models, and many other technical measurements had been used for real-time monitoring and comprehensive analysis. What had been done helped geosteering, and the putting forward of drilling track. The horizontal wells drilled in ultra thin single sand layer with the thickness of less than 2m, and the penetration rate for sandstone was higher.

在现场钻井过程中，采用LWD监控仪、综合录井仪、岩屑录井、地震解释、地质模型等多种技术手段相结合，实时监控，进行综合分析，为地质导向提供依据，并准确地指导了钻井轨迹运行，实现了在不到2m的超薄单砂层中穿行，达到了较高的砂岩钻遇率，并成功的穿越了小断层，实现了二次着陆。

Three kinds of drilling derricks for drilling a well of 3200 meters are used at present, including tower shape, K shape and A shape.

对在用的3200m钻机的塔型、A型和K型井架抗扭特性进行了分析，以满足正在发展的顶驱钻机的需要。

Since 1990's, the technology of downhole drilling measurement have madesignificant progress as a major drilling technology.

20世纪90年代以来，井下测量技术成为钻井领域的一项重大技术进步。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。