Mechanical Drilling Jar Type JZ
It takes the appliance of mechanical structure.
High pressure will not produce in inner chamber as to create a good sealing property and greatly extend the service life.
Moreover, the up or down jarring blow is adjustable prior to tripping in and will not change during the downhole operation so as to keep a constant jarring load.
Specification Series and Performance Parameters
TYPE | O.D. mm (in.) | I.D. mm (in.) | Connection API | Max. Tensile Load MN (Lbf) | Max. Working torque k N·m (Lbf·m) | Pumping area cm2 | Up jarring stroke mm (in.) | Down jarring stroke mm (in.) | Overall length ( locked) mm (in.) |
JZ95 | 95 (3 3/4) | 28 (1 1/8) | 2 7/8REG | 0.5 (112500) | 5 (1,125) | 32 | 200 (7.87) | 200 (7.87) | 5 800 (228.35) |
JZ108 | 108 (4 1/4) | 36 (1 7/16) | NC31 | 0.7 (157500) | 10 (2,250) | 38 | 203 (8.00) | 203 (8.00) | 6 404 (252.13) |
JZ121 | 121 (4 3/4) | 51.4 (2) | NC38 | 1.0 (225000) | 12 (2,700) | 60 | 198 (7.80) | 205 (8.07) | 6 343 (249.72) |
JZ159Ⅲ | 159 (6 1/4) | 57 (2 1/4) | NC46 | 1.5 (337500) | 14 (3,150) | 100 | 149 (5.87) | 166 (6.54) | 6 517 (256.57) |
JZ165 | 165 (6 1/2) | 57 (2 1/4) | NC50 | 1.6 (360000) | 14 (3,150) | 100 | 149 (5.87) | 166 (6.54) | 6 517 (256.57) |
JZ178 | 178 (7) | 57 (2 1/4) | NC50 | 1.8 (405000) | 15 (3,150) | 100 | 147.5 (5.81) | 167.5 (6.59) | 6 570 (258.66) |
JZ203 | 203 (8) | 71.4 (2 13/16) | 6 5/8REG | 2.2 (495000) | 18 (4,050) | 176 | 144.5 (5.69) | 176.5 (6.95) | 7 234 (284.80) |
JZ229 | 229 (9) | 76 (3) | 7 5/8REG | 2.5 (562500) | 22 (4,950) | 181 | 203 (8.00) | 203 (8.00) | 7 753 (305.24) |
