Different combinations of PDC drilling bits hydraulic parameters are comprehensively reflected by flow field energy transformation at oil well bottoms.
针对实际PD C钻头建立了不同的流场计算模型，比较分析了流场能量的变化规律。
Different combinations of PDC drilling bits hydraulic parameters are comprehensively reflected by flow field energy transformation at oil well bottoms.
PD C水力参数的不同综合表现为井底流场能量的变化。
By dynamical drilling tools matching with PDC drilling bits, drilling rates are able to be increased greatly, drilling costs are decreased greatly, and the drilling cycles are shortened.
动力钻具配合PD C钻头钻井，可以大大地提高机械钻速、降低成本、缩短钻井周期。
A new type of rotary bits was manufactured by processing the PDC product into drilling cutting buttons and then embedding them into rotary bits.
将金刚石复合体加工成凿岩切削齿，应用于旋转钻头上，设计制造了新型旋转钻头产品。
PDC bits have been used to drill the homogeneous formation from soft to medium-hard, but they are not suitable for drilling in gravel and multi-interbedded formation.
PD C钻头用于软到中硬的均质地层钻进具有钻速高、寿命长等特点，但不适合含砾石地层和软硬交错地层。
In addition, the drilling characteristic curves and the performance of PDC bits designed with different schemes are predicted.
此外，还对PD C钻头的钻进特性曲线，以及采用不同设计方案时的钻头性能进行了预测。
The flow field of PDC bits is very complicated during drilling process, while optimizing its hydraulics parameters is an effective method to improve its drilling performance.
PDC钻头在实钻过程中井底流场非常复杂，而优化其水力学参数是提高钻头钻井能力的有效手段。
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。
Although more and more PDC bits are used in drilling operation, but the results of drilling in the hard and soft interbedded formation are not desired.
PD C钻头在钻井破岩中所占比例越来越大，但在软硬交错的多夹层地层钻进时效果却不理想。
This paper presents a method to select PDC bits. This method USES a correlation between shear strength and drilling cost estimation per unit length.
介绍了利用剪切强度和单位进尺钻井成本的关系来进行PD C钻头选型的新方法。
This paper presents a method to select PDC bits. This method USES a correlation between shear strength and drilling cost estimation per unit length.
介绍了利用剪切强度和单位进尺钻井成本的关系来进行PD C钻头选型的新方法。
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