Drilling jar minangka alat downhole sing ngirim beban impact aksial menyang titik macet saka senar pengeboran. Jars asring baris pisanan nimbali marang pipe macet lan bisa nyimpen operator saka fishing larang regane lan operasi remedial dening cepet "jarring" senar free.
Landrill bisa nyedhiyakake Jar Pengeboran Hidrolik & Jar Pengeboran Hidrolik-Mekanik Ganda & Jari Super Fishing