In the process of oil exploration and drilling by petroleum machinery, sometimes due to the complicated geological structure, or the failure of technical measures, it is easy to cause the failure of the drilling tool to block. How to solve the jamming phenomenon? Need to use a ground jar. Next, let’s talk about how to use the ground jar:

This kind of petroleum machinery includes three kinds of jars: ground jars, while-drilling jars, and salvage jars. These three types are used in different stages. The ground jar can be used at the wellhead and jar down downwards, which is very convenient to use on site. The salvage jar is used when the job needs to be released, but the drilling jar is designed in the drill string assembly and can be released at any time.

When using a jar, it is necessary to apply sufficient pretension on the ground to unlock the locking mechanism in the tool, release the stored energy of the drill string into kinetic energy, and transmit it to the stuck point in the form of stress wave, and then let the stuck drill string Swipe up. The card can be resolved after several shocks.