Bumper Sub

The Wenzel Downhole Tools Bumper Sub is a traditional downhole tool, having numerous applications during fishing, coring, and workover operations.

  • Featuring a sealed and lubricated spline drive, the Bumper Sub will provide long service life under high torque and stroking applications.
  • Standard seals in the tool are effective to 250°F (120°C). The sub can be dressed with seals effective to 400°F (200°C) for hot hole environments.
  • External sealing surfaces are tungsten carbide coated to enhance wear and corrosion resistance.

This easy-to-operate tool can be used to:

  • Apply and release various fishing or testing tools;
  • Apply constant weight to sensitive milling and cutting tools;
  • Provide up and down jarring forces.

Imperial

Nominal OD
(inch)		 Length Closed
(ft)		 Thru Bore
(inch)		 Tensile Yield
(lbs)		 Pump Open Area
(in2)		 Torsional Yield
(ft lbs)		 Stroke
(inch)		 Approx. Weight
(lbs)
3.12 7.8 1.00 142 200 3.98 6 560 20 160
4.25 8.3 1.88 233 400 8.30 13 800 20 300
4.75 10.5 2.25 390 000 11.80 20 000 20 430
6.50 11.1 2.25 968 800 19.60 44 600 20 990
8.00 11.8 3.00 1 158 700 30.7 127 000 20 1500

Specifications are based on as new condition and are subject to change without notice.

Metric

Nominal OD (mm) Length Closed (m) Thru Bore (mm) Tensile Yield (daN) Pump Open Area (mm2) Torsional Yield (Nm) Stroke (mm) Approx. Weight (kg)
79 2.4 25.4 63 300 2 570 8 900 508 70
108 2.5 47.8 103 800 5 400 18 700 508 140
121 3.2 57.0 173 500 7 600 27 100 508 200
165 3.4 57.0 430 900 12 700 60 500 508 450
203 3.6 76.0 515 400 19 800 172 200 508 680

Specifications are based on as new condition and are subject to change without notice.

Learn more

For tool specifications and further details, contact us via our form below.