Schlumberger

Product Sheet: Safety-Lok for the Hydra-Jar AP Drilling Jar

Date: 8/29/2013

Secures the jar in neutral position during drilling operations

Safety-Lok is an optional mechanical latching section for the Hydra-Jar AP double-acting hydraulic drilling jar to secure the jar in neutral position during normal drilling operations. A predetermined tensile or compressive load, which is set higher than the normal drilling load, helps ensure against unexpected firing of the jar when properly placed.

When the latch is released, the drilling jar goes into a normal jarring cycle with the driller in complete control of the operation. When jarring impact is not required, the driller can relock the mandrel and continue drilling or tripping operations

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