WebThe Hydra-Jar AP double-acting hydraulic drilling jar enables jarring up or down and varying impact force to free stuck drillstring components to minimize NPT and avoid sidetracking. When run with...
WebWeatherford’s Dailey hydraulic drilling jar (HDJ) is a double-acting hydraulic jar designed for simple operation, variable hitting loads, and extended periods of continuous jarring in...
WebDescription Specifically designed to overcome the limitations of purely hydraulic or mechanical drilling jars, the Griffith™ HMJ provides the advantages of both tools in one solution....
WebThe Wenzel Downhole Tools Hydraulic/Mechanical Drilling Jar (HMJ) is a double acting jar, designed to deliver hydraulic delay when jarring in the up direction, and mechanical release when jarring...
WebDescription Resources We engineered the ShockForce™ double-acting fully hydraulic drilling jar with an extended stroke length to deliver industry-leading impact forces. The hydrostatically...
Webjar. 1. n. [Drilling] A mechanical device used downhole to deliver an impact load to another downhole component, especially when that component is stuck. There are two primary...












