2021年螺杆钻具使用标准手册.doc

1、Introduction
Shanghai Ocean Oilfield Service Co supplied Downhole Motor to Drilling Department of Bohai Offshore Oil Company LTD.(Tianjin), on base of mastering foreign and domestic advanced technology and linking China national situation, has developed and manufactured some types of screw drills in cooperation with oilfields and scientific research institutes. With them, we may provide satisfactory services to the oilfields.
This manual mainly introduces screw drill property, application and cautions, so as for the customers to know well our screw drills, and to do better selection, application, repair and maintenance of screw drill according to drilling demand. As a result, our screw drill may bring into play in its reliable technical function, to enhance drilling economic efficiency.
2、Principle
Screw drill is a kind of downhole dynamic drilling tool upon the power of drilling mud. Mud stream from the outlet of mud pump flows through a by-pass valve into the motor. This stream produces pressure loss at both inlet and outlet of the pump, to push the rotor into rotating, and to transmit the torque and speed onto the bit. The screw drill property mainly depends upon its property parameters
3、Constitution
Screw drill is composed of four assemblies of by-pass valve, motor, cardan shaft and drive shaft ( Fig. 1) .
序言
上海奥森油田服务为渤海石油（天津）钻井部提供螺杆钻具设备服务，和此同时联同各油田、科研院所，在消化中国外优异技术，结合中国国情基础上，开发和制造出多个型号螺杆钻具，能为油田提供满意服务。
本手册关键介绍螺杆钻具性能和使用要求和注意事项，便于用户愈加好地了解我企业钻具，结合钻井需要，选好、用好、维护好钻具，发挥其应有技术性能，提升钻井经济效益。
2．螺杆钻具工作原理
螺杆钻具是以泥浆为动力一个井下动力钻具。泥浆泵泵出泥浆液流经旁通阀进入马达，在马达进出口处形成一定压差推进马达转子旋转，并将扭矩和转速经过万向轴和传动轴传输给钻头。螺杆钻具性能关键取决于螺杆马达性能参数。
3．螺杆钻具组成
螺杆钻具由旁通阀、马达、万向轴和传动轴四大总成组成（图1）
By-pass Valve Assembly
It has two positions of by-pass and close (). It is in by-pass position during trip operation, circulates mud fluid in the drill string into the annular space by-passing the idle motor, so that