| 摘要 |
<p>A well packer has mandrel means (20) having first ratchet means (24) and lug means (26) disposed thereon, second ratchet means (82) and drag spring means (120) associated with tubular housing means (70) surrounding said mandrel means, said housing means including slot (102) means on the interior thereof, and radially expandable slip means (150, 196) disposed about said mandrel means. A compressible packer element (250) is disposed about the lower end of said mandrel means, and packer element compression means are provided associated with said mandrel means and said housing means. </p> |
