钻头

Through carrying out the force testing of single-row tooth, we have got a lot of valuable data and gain deeper understood of the interaction between bit teeth and rock. This study provides an important basis for researching the design and analysis means of rock bit in the future.

通过单齿圈破岩实验得到了大量宝贵的数据资料，对牙齿与岩石互作用过程的规律有了进一步的认识，为今后深入开展牙轮钻头设计、分析技术的研究提供了重要的技术依据。

CNC Tool: Tool 安威 Taiwan, STANNY fine sebang keep out a knife, BT shank, chuck cutter tube cutter to powerful folder-type holders to extend the pole up discarded fast bit, fine boring holes to fine-tune the system, lock knife Block pull screw bolts, Taiwan Guangjie chuck cylinder rod to extend the handle folder, durable lining Universal milling cutter drill holders, drill chuck Bao Quan, Kyushu, Japan, Japan Institute of precision high-speed SHOEA Dao BORING

数控刀具：台湾AW安威 Evermore粗搪刀刀座，STANNY世邦精粗搪刀， BT刀柄，铣刀把强力铣刀夹头筒夹延长杆舍弃式刀杆舍弃式快速钻头，微调精搪孔系统，锁刀座拉钉螺栓，台湾广杰刀柄延长杆夹头筒夹，耐久搪刀钻铣万用刀杆，铨宝钻夹头，日本九州，日研 SHOEA精密高速刀把镗刀

The analysis on abrasion of the bit indicates that there is no obvious fracture damage during drilling period,which shows that the self-balanced design has better anti-whirl property than the conventional design.

小井眼PDC钻头在大港油田直径为140mm套管开窗侧钻井的钻井工程中取得了良好的技术效益和经济效益。

A self-advanced drilling head consists of spinning jet nozzles, cutting treatment apparatus and thrust providing apparatus etc.

自进式钻头由旋转喷嘴、钻屑整合装置及推力提供装置等组成，其带动为其提供高压水动力的特製胶管向前连续钻进。

The experiment results show that the accuracy of diameter measurement of cross section of standard bar and drill flute is in the range of 10～20μm.

实验结果表明：用本标定方法对钻头和标准圆横截面的形貌数据进行计算，其直径测量精度可达到10～20μm。

Based on the study of the geological characteristics of drilling engineering at the Tongnanba belt, it is proposed to adopt optimal gas drilling, foam drilling, vertical drilling, compound drilling, rotary drilling and other drilling-oriented approaches to promote the fast and vertical drilling, to optimize the casing program and determine the appropriate casing sealing points to get proper hole sizes, to optimize drilling fluid performance to improve its anti-sloughing and lubrication capability, to stress bit selection to improve rock-breaking effects, and to take concrete lost circulation control measures to reduce non-productive time.

通过对通南巴构造带工程地质特征的研究，提出如下对策：①优选气体钻井、泡沫钻井、垂直钻井、复合钻井、旋转导向钻井等钻井方式，促进防斜打直、打快；②优化井身结构设计，合理确定必封点，科学确定井眼尺寸；③优化钻井液性能，提高防塌、润滑效果；④强化钻头选型，提高破岩效果；⑤细化防漏堵漏措施，减少非生产时间等。

The operation performance of PDC bits with screw drill tool appplied now in oilfield were analyzed comprehensively.

综合分析了目前使用的PDC钻头和螺杆钻具工作特性。

To meet the demand of higher built-up rate ,single-bending screw drill tool with large angle is used during the drilling of the moderate-and short-radius horizontal well.

钻中短半径水平井，在采用弯角较大的单弯螺杆钻具以满足高造斜率的需要时，由于套管内径较小，螺杆钻具钻头处位移比较大，螺杆钻具能否顺利通过直井段是钻中短半径水平井面临的一个重要问题。

The two C-shaped bits marked c, c' stay still while the scimitar-shaped rotors go round in opposite directions, synchronised by gears outside the casing.

两个C型钻头，标志着了C， C '仍然留，而scimitar形转子轮去，在相反的方向，花样由齿轮以外的套管。

You might start your lunch with a salad with a favorite salad dressing or a fruit salad or fruit cup or that salad might be a main course -- there are some wonderfully filling and healthy main-course salads with chicken, ham, bacon bits, seasoned croutons and a world of other ingredients.

你可先在你午餐沙拉与喜爱沙拉或水果沙拉或水果杯，或沙拉可能是一个主要的过程--有极好的油和健康主要课程沙律鸡，火腿，培根钻头，老练完世界其他配料。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。