| 摘要 |
A pulsing tool for use with a tubular string having a motor unit (110) and a pulsing unit (130) coupled to the motor unit. In one embodiment, the pulsing unit includes a mandrel (131) having an inlet opening and an outlet opening and a flow control bushing (140), wherein rotation of the mandrel relative to the flow control bushing creates a pressure oscillation which causes movement of the tubular string. |
