井下动力钻具

螺杆钻具是目前运用最为广泛的一种井下动力钻具。

Screw drilling tool is the most widely used downhole motor at present .

同时由于从井口到井底始终存在着连续的液相流，常规井下动力钻具和随钻仪器的性能不受影响，可以进行正常的井眼轨迹控制。

Meanwhile , the downhole motor and MWD are not affected and wellbore trajectory can be controlled because of the continuous fluid phase flow throughout the bore hole .

井下动力钻具用TC轴承接触问题的理论研究

Theoretical research of contact problem in TC bearing in down hole motor

注气欠平衡钻水平井技术面临的两大技术难题是井下动力钻具不能正常工作和常规MWD无法正常工作。

The two technical problems faced by the technology of under-balanced horizontal well drilling with gas injection are the down-hole motor and the conventional MWD can 't work normally .

随着井下动力钻具性能、型号的完善，再加上适合各种地层的高效PDC钻头的蓬勃发展，复合钻井技术大规模推广应用的时代已经到来。

In pace with the perfection of performance and model number of bottom-hole power drill tool , moreover concentrated PDC bit fitting for different formation is growing vigorously , compound drilling technique can be large-scale applied and disseminated .

浅谈井下动力钻具用多联推力角接触球轴承

Ball bearing of multiple-contact thrust angle for under well power drilling

井下动力钻具的发展及其在推广应用中的问题

Development of downhole drill motor and problems with its application

用纵横弯曲法对弯接头&井下动力钻具组合的三维分析

Three-dimensional analysis of down hole motor with bent sub using beam-column theory

短半径水平井铰链式井下动力钻具组合力学模型的建立与分析

The establishment and analysis of mechanical model of JOINT-HINGE power BHA in short-radius horizontal well drilling

推广应用金刚石钻头配井下动力钻具，提高高密度条件下硬地层钻井速度技术；完善与发展井漏的测漏与综合堵漏技术。

Application of diamond bits with downhole power drilling tools is popularized to improve the drilling speed in hard formations under high-density conditions .

利用钻具振动信号和综合录井参数进行故障检测与诊断也有其局限性，井下动力钻具的扭矩和振动信号地面传感器无法检测。

The Fault Detection and Diagnosis system also has limitations that the surface sensors can not detect torque and vibration signals of mud motor .

为解决在充气钻井液欠平衡压力钻井时，使用常规井下动力钻具和随钻测量仪器进行井眼轨迹控制中遇到的技术难题，研制了双壁钻具。

A double-wall drill tool has been developed to solve problems arising in the process of controlling the wellbore trajectory using conventional downhole mud motor and MWD in under-balanced drilling with aerated drilling fluid .

现场试验表明，使用充气钻井液进行欠平衡钻井时，应用双壁钻具可使井下动力钻具和随钻仪器的性能不受影响，能进行正常的井眼轨迹控制。

Field experiments indicate that using double-wall drill tools can prevent impacting the performance of the downhole mud motor and MWD and the well trajectory can be controlled in under-balanced drilling with aerated drilling fluid .

针对复合钻井钻头转速高、井下动力钻具的输出扭矩受限制的特点，研制了一种尖圆混合布齿、低扭矩的新型金刚石钻头。

Because ordinary drilling bits are not suitable for high rotation speed and limited torque of mud motors in compound drilling , a new type of diamond bit with alternately arranged round and sharp cutting teeth was invented .

改革开放以来，我国油气钻井新技术的应用获得重要进展，井下动力钻具，如螺杆钻具和涡轮钻具也获得迅速发展。

Great progress has been made in the development of new drilling techniques , downhole drill motors , such as screw drill and turbodrill , are developed rapidly since reform and opening to the outside world in China .