Fishing jar

A fishing assembly, comprising:

• a first fishing jar configured to generate a shock directed in a first direction relative to a fish, wherein the first fishing jar comprises:
• an outer housing that is configured to connect to a work string;
• a mandrel positioned at least partially within the outer housing and having a fish end configured to engage a fish;
• an anvil coupled to or integral with the mandrel;
• a hammer coupled to or integral with the outer housing;
• and
• a triggering mechanism configured to generate the shock in response to:
• the outer housing being lifted in a second direction that is opposite to the first direction and relative to the mandrel, or to the mandrel being pressed in the first direction relative to the outer housing, and
• the outer housing being pressed in the first direction relative to the mandrel;
• and
• a second fishing jar configured to generate a shock in the second direction relative to the fish, wherein the first fishing jar and the second fishing jar are each connectable to a work string, to another of the first or second fishing jar, such that the first and second fishing jars are modular.

A method for applying a shock to a fish in a well, comprising:

• deploying a fishing jar into proximity of the fish;
• moving an outer housing of the fishing jar in an uphole direction relative to a mandrel of the fishing jar, wherein the outer housing and the mandrel define an annulus therebetween, and wherein a triggering mechanism controls a fluid flow between a first chamber of the annulus and a second chamber of the annulus;
• and
• pressing the outer housing of the fishing jar, such that the outer housing moves in a downhole direction relative to the mandrel,
• wherein the triggering mechanism permits hydraulic fluid to move from the first chamber to the second chamber at a first rate until the outer housing reaches a trigger position relative to the mandrel,
• wherein the triggering mechanism permits the hydraulic fluid to move from the first chamber to the second chamber at a second rate that is higher than the first rate after the outer housing reaches the trigger position, until a hammer of the outer housing impacts an anvil of the mandrel, to generate the shock, and
• wherein a rate of movement of the outer housing relative to the mandrel is proportional to a rate at which the hydraulic fluid flows from the first chamber to the second chamber.