| 摘要 |
An injector head used in coiled tubing systems including at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops having a chain. The injector head further includes a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the second end of the chain loop. In the injector head, there is a force applied to the floating bottom sprocket to maintain the chain loop at a desired chain tension. Additionally, the injector head includes a tension cylinder that automatically maintains the chain loop at the desired chain tension. |
