Hydraulic jars are downhole tools that are installed in the drill string to generate strokes, when needed, to help free the drill string if it got stuck in the hole.

FEATURES:
- one-section design that makes the build-up of the BHA faster and easier compared to using two-section jars
- rugged spline connection that enables effective torque transmission during rotary drilling
- metering device of a special design that guarantees consistent delay times to control impact force
- strokes can be generated at the stuck point with different impact force and intensity in both up and down directions
- increased inner diameter enables MWD tools to easily pass through the jar
- guaranteed operation at bottom-hole operation up to 200 ÂșC
- availability of jars in standard sizes 4 1/4, 4 3/4, 7 and 8 inches (108, 121, 178 und 203 mm)

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