Drilling Tools
Special Features For Drill Collar
Spiral Grooving In order to reduce differential pressure sticking, the surface of drill collars can be spiral-grooved.note 1-Loss of weight is approximatively 4%, compared to slick drill collars. note 2-Length of spiraled section allows reconditionning of connections.
Technical Data
| Item | Value |
|---|---|
| classification | Drilling Tools |
| source | Tianhe Catalogue / Website |
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