Kaishan 20 rock drill does not blow down the wind

There is dirt stuck in the wind flap or other rotating parts 1. Send the minor repair station in time to remove or replace the necessary parts. 3. If you use the air duct to refuel, do not add too much fuel at a time, but you must work hard. [pdf]

Horizontal drill rig thermal imaging

An integrated circulation temperature model for horizontal well drilling was developed, field-tested, and compared with results from vertical wells in order to accurately predict bottomhole temperature while. [pdf]