Drilling Jar (Hydro-Mechanical)

Drilling jar connected with drill tool and worked with drill stem is used for freeing stuck in driling operation. Ait is a first selected tool for directional well, complicated well and deep well. The jar is consisting of ZSJ (hydro) and zxj (down jaring tool, mechanical). The jarring force can be adjusted according to up elevating load but can not exceed the max. Load for tool load rated. Type Type Parameters Item ZSJ 80B ZXJ 80B ZSJ 76B ZXJ76B ZSJ70B ZXJ70B ZSJ 62B ZXJ62B ZSJ 56B ZXJ56B ZSJ46B ZXJ46B O.D.(mm) 203 197 178 160 146 121 I.D.(mm) 71.4 71.4 70 57 57 51 Pull down overall length (mm) Up 5515 5515 5424 5360 5730 5270 Down 5250 5250 5215 5208 5000 305 Pull down stroke (mm) Up 368 368 344 344 332 305 down 178 178 178 178 180 178 Thread conn. API 65/8REG 65/8REG NC50 NC46 NC46 NC38 MAX.tensile load (kn) 2500 2500 2300 2200 2000 1400 Rated release force for up jar (KN) 400~600 400~600 350~550 300~450 200~350 150~250 MAX.UP JARRING RELEASED FORCE 750 750 550 550 450 270 MAX. down jarring release force 600 600 550 500 400 250