| 摘要 |
<p>A reaming tool 5 for use while inserting tubular components 3 into a wellbore includes a motor housing 11 configured to be coupled to one end of a string of tubular components 3. A motor is disposed in the housing. An output shaft 9 is rotationally coupled to the motor. The output shaft 9 is configured to be coupled to a cutting structure, such as a reamer shoe 7, at one end thereof. A lock is selectively engageable to rotationally fix the output shaft to the motor housing. The lock may be in the form of a male cone disposed (14, fig 3) within a mating female cone</p> |
