| 摘要 |
<p>A separation catch mechanism disposed above a power section of a motor prevents full separation of lower components of the motor from upper components and an attached drillstring. An extension of the mechanism has a first end coupled to the rotor and has a second end disposed in a housing member beyond a seat. An expandable shoulder, such as a washer, disposed on the second end of the extension can be expanded thereon to engage the seat should housing components separate from one another on the motor. To expand the washer after being inserted during assembly past the seat, the second end of the extension has a tapered head on which the washer is disposed. The outside diameter of the washer is expanded on the tapered head by tightening a nut against the washer. 2062719v1</p> |
