Both the derrick deviation and the wellheads eccentricity will cause the serious wearing of the casing (or casing protecting tube) close to the wellhead.
Both the derrick deviation and the wellheads eccentricity will cause the serious wearing of the casing (or casing protecting tube) close to the wellhead.
摘要井架不正或井口偏心，会造成近井口套管（或套管防磨套）的磨损。