What You Need to Build the Perfect Tool String

From crossover connections to rod pump protection, Bull Dog Tool machines the support gear that brings your toolstring together. Everything is precision-cut and made in the U.S., with fast turnaround and custom threading available. Our precision-made Crossover Subs are cut to your exact OD, ID, and thread specs, with premium connections and fast delivery available. For weight and stability where it counts, we stock high-strength Drill Collars in multiple sizes, ready to be threaded and dressed to match your job.

 

Downhole, the Pump Isolator seals off around the top of your insert pump to prevent sand and debris from packing the tubing — reducing wear, cutting trips, and saving serious time on rod-pumped wells. And when safety’s the priority, our full line of Safety Joints gives you a backup plan built to full torque and tensile specs, with max bores for smooth flow and wireline access. Everything we make is cut in-house or through trusted U.S. partners — built fast, built right, and built to work.