Fishing Tools: Drilling/ Fishing Jars,Accelerators, Bumper Subs
This article describes force multiplying fishing tools: Jars, Accelerators, Bumper Subs.
Drilling/ Fishing Jars
If a fishing specialist contractor is used, the contractor should be consulted on a case by case basis for the optimum selection and placement of jars.
A gas-charged (N2) accelerator or “intensifier” may be run to greatly increase the effectiveness of the jarring action. They are positioned above the jar separated by one joint of drill collars. Accelerators are also available in double-acting mode, to match the jar action. Typical . . .