A unique combination of -20 degree self-locking reverse flank angle on the threads and symmetrical load distribution when combined with W-Wall™ double-annealed mid-body, make XQ™ wireline coring rods some of the deepest rated coring rods in the market.

Self-Locking Reverse Flank Angle
XQ has an increased negative flank angle from of -20 degrees compared to -10 degrees in RQ™ rods. The increased negative flank angle combined with the double-start threads, nearly eliminate box bulging and provides greater strength in high torque applications.

Symmetrical Load Distribution
Patented XQ joints have opposite double-start threads that are self-aligning so mating engages smoothly. This provides a balanced load response and double the contact area, which means half the contact pressure. This symmetrical load distribution increases load capacity significantly for stronger rods with deeper capacity.

W-Wall™ Double Annealed Mid-Body
W-Wall has a more uniform bend distribution like straight wall, stiffness comparable to Boart Longyear’s variable wall rod, V-Wall™. The result is a rod with flexibility for ease of directional work that holds up better than V-Wall. Boart Longyear™ rods are put through a proprietary process during manufacturing to remove all residual stress and maximize strength and resistance to bending.

Patented XQ Mating Joints
Opposite double-start threads are self-aligning so mating engages smoothly. XQ  mating joints nearly eliminates jams for the best make and break around. They also eliminates the driller assistant back-turning to thread the joints for better safety and productivity.

Imagine not having to send the driller assistant back near energized components to have them 100% back turn the rod to mate the threads or trying to mate the threads by hand at all. XQ Rods keep workers safer by keeping them away more often. Plus, more meters can be drilled because less time is spent mating threads.

 Thread Coarseness
XQ rods have two threads per inch for reduced rotation and easier manual make up. When making joints by hand, rotation places stress on wrist. Threads with less rotation are faster to make up and generate less fatigue and potential for repetitive use injuries. The driller assistant spends less time trying to mate threads – for more meters and core in the box.

Boart Longyear’s W-Wall™ tubing option on RQ rods made drill strings up to 30 percent lighter, thanks to its thin-walled mid-body. The lighter drill string increased drill rig depth capacity and reduced fatigue in driller's when manually tripping. The enlarged inner diameter also significantly reduced inner tube tripping time for improved productivity.

The new NXQ™ and HXQ™ W-Wall coring rods feature patent-pending, double-upset tubing, with the same overall weight reduction and faster wireline tripping speed as W-Wall. However, the standard wall thickness in the middle of XQ rod eliminates premature mid-body wear and resists bending, performing like straight wall tubing.

As all Boart Longyear coring rod, XQ W-Wall tubing is cold-drawn from high quality, North American alloy steel, uniquely processed to Boart Longyear specifications.