Jarring Method and Apparatus Using Fluid Pressure to Reset Jar

摘要: A method and apparatus for delivering repetitive jarring impacts to a stuck object downhole. The tool is deployed on coiled tubing or other tubular well conduit, fluid pressure used cycle the jar without reciprocating conduit at wellhead. includes hydraulic reset assembly. chamber in communication with flow path through tool. Thus, when internal inside exceeds external well, drives piston urge toward contracted position. In this way, assembly can overcome tendency of extend be configured balance equalize extension pressure, prevent undesired cocking tool, contract recocking mechanism.