| 摘要 |
A wellhead lubricator comprising a housing arranged for vertically extending attachment to a wellhead assembly and having a wireline for supporting a wireline tool therein and passing the wireline tool in and out of the well to the point of attachment to the wellhead; a laterally extending portion of the housing forming a part of the chamber of the housing; a longitudinally extending portion extending from the laterally extending portion and having an opening for passage of a wireline tool therethrough while the housing remains attached to the wellhead; a cap for closing the tool opening; a guide supported in the housing and shiftable between a first position for guiding the wireline tool in and out of the well through the point of attachment to the wellhead and a second position for guiding the wireline tool to the longitudinally extending portion; a spring-actuated valve member for urging the guide to the second position for guiding the wireline tool to the longitudinally extending portion; and a fluid-actuated valve member for urging the guide to the first position for guiding the wireline tool in and out of said well at the point of attachment to the wellhead.
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