| 摘要 |
<p>A lubricator section, useful for servicing wells, requiring no welds or threads to connect the box and pin union portions to the tubular body. The box and pin union portions are formed on the tubular body ends. A shoulder, retaining the connecting collar on the pin end, is provided by circular segments lockable between the collar and tubular body. A valve may be connected to the body to permanently lock the segments between the collar and body.</p> |
