Impact jar delay, activation indicator, shock absorber, and relatch assist

An impact jar apparatus, comprising:

• a dynamic portion having a first connector for connection to an upper portion of a downhole tool string for conveyance within a wellbore penetrating a subterranean formation;
• a static portion having a second connector for connection to a lower portion of the tool string;
• and
• a hydraulic manifold in fluid communication with an annulus defined between the dynamic and static portions, wherein the hydraulic manifold is configurable to adjust a delay between application of a trigger tension to the tool string and consequent activation of the impact jar apparatus;
• wherein the hydraulic manifold comprises:
• a first flow restrictor;
• a second flow restrictor;
• and
• first and second valves configurable to collectively control fluid flow from the annulus to the first and second flow restrictors and thereby adjust the delay;
• and
• wherein the first and second valves are configurable to select the delay from one of a plurality of delays comprising:
• a first delay resulting from the first valve being closed and the second valve being open such that fluid from the annulus flows to the first and second flow restrictors;
• and
• a second delay resulting from the first and second valves being closed such that fluid from the annulus flows to the first flow restrictor and not the second flow restrictor.