Two-way Shock Sub Type SJ
group nameDownhole Tools
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Min Order1 piece
modelSJ
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update timeThu, 16 Aug 2012 20:46:45 GMT
Paramtents
FUNCTION shock absorbing
CERTIFICATE API 7-1
Packging & Delivery
Min Order1 piece
Briefing
Detailed
The two-way shock sub type SJ is an effective shock absorbing device. It can be used to reduce or eliminate both transversal and longitudinal vibration of drill string, thus it helps maintain normal weight-on-bit (WOB) and torque, so that it helps to reduce drill string connection fatigue and prolong drill string life.
Specification Series and Performance Parameters
Type | SJ 121 | SJ 159Ⅳ | SJ165 | SJ 178Ⅳ | SJ 203 III | SJ 229 III | SJ254 | SJ279II |
O.D. mm（in.） | 121 (4 3/4) | 159 (6 1/4) | 165 （6 1/2） | 178 (7) | 203 (8) | 229 (9) | 254 (10) | 279 (11) |
I.D. mm（in.） | 38 (1 1/2) | 48 （1 7/8） | 48 （1 7/8） | 57 (2 1/4) | 65 (2 1/2) | 71.4 (2 13/16) | 71.4 (2 13/16) | 76.2 (3) |
Max. Working Stroke mm（in.） | 100 (3.94) | 120 （4.72） | 120 （4.72） | 120 (4.72) | 120 (4.72) | 140 (5.51) | 120 (4.72) | 160 (6.3) |
Ambient Temperature ℃ | 120~180 | -40~150 | -40~150 | -40~150 | -40~150 | -40~150 | -40~150 | 40~150 |
Max. Working Torque kN·m (Lbf·m) | 10 (2250) | 15 (3375) | 15 （3375） | 15 (3375) | 20 (4500) | 20 (4500) | 25 (5625) | 30 (6750) |
Max. Working Load kN (Lbf) | 300 (67500) | 340 (76500) | 340 (76500) | 350 (78000) | 450 (100000) | 540 (121500) | 600 (135000) | 600 (1350000) |
Max. Tensile Load MN (Lbf) | 1.2 (270000) | 1.5 (337500) | 1.9 427500) | 1.9 (427500) | 1.96 (441000) | 2.16 (486000) | 2.54 (571500) | 2.94 (661500) |
Overall Length mm (in.) | 4208 (165.67) | 5494 （216.3） | 5494 （216.3） | 5735 (213.19) | 6080 (239.37) | 6080 (239.37) | 6400 (251.97) | 5580 (219.69) |
Connection API | NC38 | NC46 | NC46 | NC50 | 6 5/8 REG | 7 5/8 REG | 8 5/8 REG | 8 5/8 REG |
Average Rigidity kN/mm (Lbf/mm) | 3.5 (787) | 3.5 (787) | 3.5 （778） | 3.9 (877) | 3.9 (877) | 3.5 (787) | 3.5 (787) | 3.5 (787) |
