Pulse DL_W is consisted of sealed communication joint, fluid pressure balance device, magnetic drive, drive bar, valve stem of flow distribution, flow distribution valves, drainage sets, pressure springs, piston stem device and the signal valves.…

Wireless MWD major progress and status about technology With the directional wells, horizontal wells, branch wells and horizontal wells, such as large displacement special process of the rapid development of drilling technology, wireles…

Wireless MWD apparatus basic classification MWD wireless inclinometer are a new type of measurement-while-drilling apparatus , developed on the basis of a cable while drilling inclinometer…

1. Outlines In recent years, the MWD and its related technologies have developed rapidly, expanding applications, the overall trend is from the cable while drilling to a wireless MWD gradually and MWD parameters growing vigorously, to devel…