Surface Bumper Jar Type DJ
Surface Bumper Jar Type DJ can be only used on drill platform, producing the downward jarring force. The jarring tonnage should be adjusted momentarily on drill stand for reliable property and usableness. The accidents for key-seating stuck, necked-in stuck and sucking stuck can be handled effectively. It can be mounted on drill string as to realize the jarring operation when accident happened.
Specifications
| Model | O.D.mm(in) | I.D.mm(in) | Connection | Max. Jarring ForcekN | Max working LoadkN(lbf) | Tensie Yield StrengthkN(lbf) | Max.Working TorguekN·m(lbf·ft) | Torsional Yield StrengthkN·m(lbf·ft) | Max. Strokemm | lengthmm |
| DJ46 | 121(4-3/4) | 31.8(1-1/4) | NC38 | 400(90000) | 1000(225000) | 1950(438000) | 15(11000) | 27(20000) | 1800(70-7/8) | 3395(133-11/16) |
| DJ159 | 159(5-1/4) | 50.8(2) | NC50 | 600(135000) | 1600(360000) | 2700(600000) | 25(18000) | 65(48000) | 1223(48-1/8) | 3030(119-5/16) |
| DJ70Ⅱ | 178(7) | 50.8(2) | NC50 | 700(160000) | 2400(540000) | 4650(1050000) | 30(22000) | 80(59000) | 1222(48-1/8) | 3030(119-5/16) |
| DJ80 | 203(8) | 50.8(2) | 6 5/8REG | 800(180000) | 2800(630000) | 6100(1370000) | 35(26000) | 145(100000) | 1200(47-1/4) | 3248(127-7/8) |