| 摘要 |
A tubing rotator and hanger is used in a wellhead of an oil well. The rotator has a rotator body including a flange and a sleeve projecting from t he bottom end of the flange. The flange engages between the wellhead flange and the upper wellhead components, adding a very short height to the overall height of the wellhead. A mandrel extends through a bore in the rotator body and is supported in the body by a bearing supporting a load shoulder on the mandrel. A ring gear is keyed to the mandrel and is driven by a worm extending into a bore in the rotator body flange. In preferred embodiments, the load shoulder and ring gear can be removed from t he mandrel, allowing the rotator body to be lifted off the mandrel and a BOP installed when necessary.
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