4 ¾” X-Series

The “X” means extra flexible and the 4 ¾” OD tool has a comprehensive service history from both multi-lateral producers and exploratory work.

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The 4 ¾” X-Series AST has a stroke capacity of 10” or 0.25m and can be configured for all regular drilling operations including work with motors and under-reamers. For extended laterals, the tool can also be configured to better capture and preserve the weight coming through and produce a more constant push on the bit. For vertical drilling, the 4 ¾” X-Series AST not only prevents harmful stick-slip and drilling vibrations, but it also provides a safer way of operating sensitive, tapered drill-strings.

The inner diameter is 1 ½”, which presents no restrictions to relevant drop-balls. The pressure loss through the tool is 150 psi at 350 GPM or 10 bar at 1300 lpm. The tool can also be configured for high temperatures.

Parameter Metric Imperial
Length 5.49m 18.01’
Max. OD 121mm 4.75”
Min. ID 35mm 1.38”
Connection top NC 38 box NC 38 box
Connection bottom NC 38 pin NC 38 pin

Improved-weight-transfer-and-stick-slip-mittigation-4,75

For extended laterals, the 4 ¾” XC AST tool comes specially configured to better capture and preserve the weight coming through, in order to produce a more constant push on the bit. Compare ASTs to find exactly the AST tool needed.

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