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Hole Opening

NightHAWK Series Drilling Jar System

The NightHAWK Series Drilling Jar System (NESDJS) is a unique jar design that can be assembled as a mechanical, hydraulic mechanical, or double-acting hydraulic mechanical, all in one design. The jar can be modified quickly in a service facility by changing out two simple components to meet any requirements in the field.

The NESDJS features a mechanical latch system that locks the jar in place until the settings are exceeded by pulling or slacking the drill string while stuck, and once released enters into a hydraulic delay that uses the drill string’s energy while delaying the release, creating energy to jar the drill string.

The NESDJS is designed for multiple jarring events, and utilizes unique hydraulic valves and spacing for optimal jarring force.