| 主权项 |
1. A tool for boosting fluid pressure downhole, the tool comprising:
a tool housing configured for coupling to a drill string, the tool housing defining a fluid flow passage; a sleeve rotatably positioned around the tool housing, the sleeve comprising one or more gripping members on an outer portion of the sleeve configured to grip a wellbore wall; a drive shaft passing through the tool housing and having a central gear; at least one drive gear rotatably coupled to the sleeve, the at least one drive gear meshing both with an inner portion of the sleeve and with the central gear; and a pump mechanism coupled to the drive shaft to receive power imparted by rotation of the drive shaft, the pump configured to increase a fluid pressure within the flow passage. |
