Analysis on magnet dynamic guidance force when low-speed maglev train passing curve;

An equipment measuring guidance force of a HTS Maglev vehicle;

Both levitation and guidance force were collected by the measurement system at the same time.

Establishment and analysis of equal bias force composition model for modulated steerable rotary drilling system;

The forming mechanism of bias force of the RCLD system for the rotary steering drilling technology was investigated.

The results show that this kind of steering tool can not only realize the control of the magnitude and direction of the bias force,but also is simple in structure and high in reliability.

The paper analyses the levitation force and guide force from two different aspects which are magnetic circle and magnetic field and find the main factors affecting the magnitude of levitation force.

It can produce guide force by electromagnetic force.

Through studying the guiding force and hole enlargement force of actuating mechanism on rotary steerable drilling tool with more than 2 pistons, some conceptions such as piston angle, margin angle, interim angle are put forward, and the general law is derived about piston number and maximum number of simultaneous actuating piston between steering force and hole enlargement force.

Analysis of steering ability of BHA in build up section of horizontal well Shugu 11;

The thrust force of the actuating mechanism is a key parameter revealing the steering ability of the rotary steering drilling system.

The cooperative directions of the news plan will be more important,because,after the entry of WTO,domestic media groups who intend to exterd their international influence are bound to intensify cooperation in news plan,emphasising news cooperation.