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Product

Tomax 4.75”
X-series AST

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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Length

5.49 m
18.01 ft

Max. OD

121 mm
4.75”

Min. ID

35 mm
1.38”

Connection

top

NC 38
box

bottom

NC 38
pin

Tomax AST 4.75" seen from both sides

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.

The 4 ¾” X-Series presents an exceptional stroke to provide steady loading of the bit even with significant axial stiction in slim laterals.
Image of 4 ¾” X-Series AST High Torque (HT 38) connections Tomax
The 4 ¾” X-Series AST has High Torque (HT 38) connections as an option. Based on its torsional capacity and ability to predictably absorb peak loads the tool can provide a great safety improvement when used as a torsional buffer to protect less capable connections further down in the BHA.

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Estimate cost or order 

a Tomax tool in minutes

In our new order portal you will be able to get price estimates in minutes, manage your orders and generate new orders for our AST tools.

Select Your Tool

Customize your requirements using our intuitive dropdown menus. Simply select the tool size, quantity, and preferred connection type. For a more tailored experience, you can include your location and rig details before clicking CALCULATE.

Get an Instant Estimate

Receive a transparent, no-obligation cost estimate immediately. To ensure you have all the technical details upfront, Datasheets and User Manuals are available for download directly alongside your quote.

Seamless Ordering & Tracking

Manage your orders with 24/7 access to our portal. As your delivery is prepared for shipping, you will receive real-time email notifications. Every order includes a complete digital documentation package, including technical drawings and material certificates for your specific tools.

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