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Oil Works, Inc.
…has been in the repair and manufacturing business for over 10 years. During this time we have repaired many Pneumatic Kelly Spinners and in most cases have found the same failures and safety issues. We have addressed this problem and believe our new OWI 1500 Pneumatic Kelly Spinner to be the best on the market. We offer variable speed control, increased torque through its entire rpm range, increased safety, and decreased maintenance.

Patent # US6, 619, 389

Pneumatic Kelly Spinners currently on the market are single speed (wide open). They are engaged by opening a valve that can only supply full air flow to the motors on the Kelly Spinner which means they can only be operated at full speed (approximately 150- 200 rpm, depending on load) when making-up or breaking-out pipe.

The OWI 1500 includes a Pilot Operated Pressure Control Valve & Throttle Control Actuator Valve which gives the operator full control over the speed range (rpm) of the Kelly Spinners from 1- 200 rpm. This is a huge safety factor in the operation of these units.

Pneumatic Kelly Spinners currently on the market use a Vane type air motor. This type motor requires a surge of air to start its rotation and must maintain a certain speed to continue rotating. The air use for these Kelly Spinners @ 120 psi. is approximately 600 scfm and produces approximately 25 hp and 93 ft-lbs torque. The Vane type motor also requires treated air that must go through a lubricator and water filter to clean the air supply before it enters the motors.

The OWI 1500 utilizes a Turbine motor which will operate efficiently from 1-200 rpm stem speed. The Turbine motor requires no lubrication and uses only a “Y” strainer to keep large debris out of the motor. The air use for the OWI 1500 @ 120 psi. is approximately 475 scfm and produces approximately 37 hp and 105 ft-lb torque.

Pneumatic Kelly Spinners currently on the market use a bearing arrangement that includes a tapered cup and cone in a top bearing carrier and a tapered cup and cone in a bottom bearing carrier. This arrangement allows the Kelly Spinner Stem to move inside the housing when the pipe is being torqued which results in wear on the stem and labyrinth plates. This arrangement also allows for excessive bearing clearance and in some cases premature failure.

The OWI 1500 has a full tapered roller bearing set in the top bearing carrier and a straight radial roller bearing in the bottom bearing carrier. This gives much more stability to the Kelly Spinner Stem when the pipe is being torqued and eliminates premature wear to the stem, labyrinth plates, and bearings.