Quick information Brand name: jingmeiplace of origin: china Description Mechanical-hydraulic drilling jar Sjy double-acting / mechanical-hydraulic drilling jar Sjy double-acting mechanical-hydraulic drilling jar integrates upward jarring with downward jarring hydraulic drilling jar with mechanical interlocking. It can suit for all kinds of drilling operations, and landing into the well with drilling tools assembly when used. When the drilling tools are stuck, it can make drilling jar generate upward or downward jarring force through lifting and landing the drill strings, so it can release resistance and the stick by many time jarring, and recover normal drilling operation promptly. If adjust the release force, it can be adjusted any time on the spot. We produce h2s resistance jars, which adopt high quality import sul fur-resistance material. Modelod Mm(in)id Mm(in)conn. Apimax. Tensile load (kn)max. Upward jarring force (kn)max. Downward jarring force (kn)full open Length (mm) Sjy121121(4 3/4)44.5(1 3/4)nc383503501808950 Sjy165165(6 1/2)57(2 1/4)nc507007003509260 Sjy203203(8)70(2 3/4)6 5/8reg100010005009786 Packaging & delivery Packing :according to customer requirementsminimum order : 1 piecessupply ability : 600 sets/year.