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The up-down jarring of Full-Hydraulic Drilling Jar Type QYII can be acted hydraulically, realizing the stepless control of up-down jarring tonnage. It can protect the drill string effectively and improve the using life. The hydraulic stored energy mechanism has the advantage of reliable property and good stability. The scope of time delay interval can be 30s～240s;the scope of service temperature can be -40℃～180℃. It can adopt the new special material for higher property and safety. It can normally used for drilling, coring, work over and fishing etc.
QYSZ type drilling jar is one kind of hydraulic jar that can be used to release the sticking drilling tools. When drilling tools get stuck, with this one-piece up and down hydraulic jar, a powerful force is available to release the tools and promise revert the drilling operation as soon as possible.
When using QYSZ type full hydraulic drilling jar, the operator can do adjustment on the ground(No need to make any change of the torque), the jarring force and the direction can be adjusted. This hydraulic jar is easy operated,more reliable and can be generally used in drilling, coring, fishing and cementing operation.
Upward jarring working principle
Lifting the stem to give the tool a up force, upper damping mechanism structure moving with it, after the oil get enough pressure, then reach a predetermined stroke, it may produce a upper force to release the drill stem.
Lower jarring working principle
Compared with upper jarring working principle, it is quite different to release the drill stem to produce the pressure, the ways to store the energy are the same as up jarring, finally we will get a downward jarring force to release the sticking tools in the down hole.
| MODEL | O.D. MM(IN) | I.D. MM(IN) | CONNECTION | MAX. UPWARD JARRING FORCE KN(LBF) | MAX. DOWNWARD JARRING FORCE KN(LBF) | MAX WORKING LOAD KN(LBF) | TENSIE YIELD STRENGTH KN(LBF) | MAX.WORKING TORGUE KN.M(LBF.FT) | TORSIONAL YIELD STRENGTH KN.M(LBF.FT) | LENGTH MM(IN) |
| QY80Ⅱ | 80(3-1/8) | 25.4(1) | 2 3/8REG | 150(34000) | 60(13500) | 350(78000) | 600(130000) | 3(2200) | 6(4400) | 5550(218-1/2) |
| QY95Ⅱ | 95(3-3/4) | 31.8(1-1/4) | 2 7/8REG | 200(45000) | 100(22500) | 600(130000) | 1000(225000) | 4(2950) | 8(5900) | 5600(220) |
| QY121Ⅱ | 121(4-3/4) | 50.8(2 ) | NC38 | 350(79000) | 180(40000) | 930(209000) | 1400(315000) | 15(11000) | 27(20000) | 9801(385-7/8) |
| QY159Ⅱ | 159(6-1/4) | 57.2(2-1/4) | NC46 | 700(160000) | 350(79000) | 1600(360000) | 2450(550000) | 25(18000) | 65(48000) | 9830(387) |
| QY165Ⅱ | 165(6-1/2) | 57.2(2-1/4) | NC50 | 700(160000) | 350(79000) | 1600(360000) | 2450(550000) | 25(18000) | 75(55000) | 9830(387) |
| QY178Ⅱ | 178(7) | 71.4(2-13/16) | NC50 | 800(180000) | 400(90000) | 2400(540000) | 3700(830000) | 30(22000) | 80(59000) | 9830(387) |
| QY203Ⅱ | 203(8) | 71.4(2-13/16) | 6 5/8REG | 1000(225000) | 500(112000) | 2800(630000) | 4450(1000000) | 35(25800) | 145(100000) | 9918(390-1/2) |
| QY229Ⅱ | 229(9) | 76.2(3) | 6 5/8REG | 1200(270000) | 600(135000) | 3000(670000) | 7100(1600000) | 35(25800) | 160(118000) | 9908(390) |
| QY241Ⅱ | 241(9-1/2) | 76.2(3) | 7 5/8REG | 1250(280000) | 650(146000) | 3500(787000) | 8100(1820000) | 40(29500) | 180(133000) | 9908(390) |
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