| 摘要 |
Present embodiments are directed to a device for a top drive drilling system (40). The device includes a movable sleeve (68) configured to be disposed around at least a portion of a sub (56). The movable sleeve (68) is configured to be selectively disposed around a tubular (36) by sliding axially along the sub (56). The device also includes a plurality of engagement features (78) extending inwardly from an inner circumference of the movable sleeve (68). When the movable sleeve (68) is disposed around the tubular (36), the plurality of engagement features (78) are configured to engage the tubular (36) when the movable sleeve (68) is rotated in a first direction and to not engage the tubular (36) when the movable sleeve (68) is rotated in a second direction. |
