Double-Acting Hydraulic Mechanical Drilling Jar
Product Portfolio
TAKELO manufactures a complete line of drilling jars in full compliance with API Spec 7-1:
Hydraulic Drilling Jars provides consistent impact force with controlled delay.
Hydraulic-Mechanical Double-Acting Jars, capable of delivering impacts in both upstroke and downstroke.
Fishing Jars, reinforced for heavy-duty retrieval of stuck bottom hole assemblies.
Quality and Performance
Each product is produced from alloy steel forgings subjected to quenching and tempering heat treatment. All load-bearing sections undergo 100% ultrasonic inspection (UT) and magnetic particle inspection (MPI). Functional tests include hydrostatic pressure verification and fatigue cycle testing exceeding 5,000 impact strokes at rated load. Tool joints and mandrels are dimensionally verified for torque capacity and wear resistance.
With these measures, TAKELO drilling jars provide reliable impact performance in both conventional and HPHT wells, ensuring operational safety and extended service life under demanding drilling conditions.
Product Specification
OD |
mm (inch) |
121 (4-3/4) |
165 (6-1/2) |
203 (8) |
229 (9) |
ID |
mm (inch) |
50.8(2) |
57.2 (2-1/4) |
71.4 (2-13/16) |
76.2 (3) |
Tool Joint Connection |
API |
NC38 |
NC50 |
6-5/8 REG |
7-5/8 REG |
Max. Upward Jarring Force |
KN(lbf) |
450 (100,000) |
630 (140,000) |
820(184,000) |
1000 (225,000) |
Max. Downward Jarring Force |
KN(lbf) |
230 (51,700) |
360 (81,000) |
460 (103,500) |
500 (112,000) |
Max. Tensile Load |
KN(lbf) |
1100 (247,000) |
2000 (450,000) |
2500 (562,000) |
3000 (675,000) |
Tensile Yield |
KN(lbf) |
1500 (337,000) |
3000 (675,000) |
4000 (900,000) |
6000 (1350,000) |
Torsional Limited |
KN m (lbf-ft) |
13 (10,000) |
15 (11,000) |
20 (14,000) |
45 (33,000) |
Torsional Yield |
KNm (lbf-ft) |
20 (14,000) |
25 (1&000) |
35 (25,000) |
60 (45,000) |
Overall Length |
mm (ft) |
6370 (20.9) |
7015 (23) |
7310(24) |
7431 (24.4) |