| 摘要 |
<p>A coring assembly (10) comprises a shoe (18) and a tubular body (20) having a first end coupled to the shoe. An inner sleeve (22) is releasably coupled to the shoe and has a first end (40) disposed within the shoe and a second end (42) that is slidably engaged with the tubular body. A middle sleeve (24) is slidably engaged with the tubular body and releasably coupled to the shoe. At least a portion of the middle sleeve is disposed within an annulus defined by the inner sleeve and the tubular body.</p> |
