Double-Acting Hydraulic Mechanical Drilling Jar - China Suppliers and Factory for Downhole Impact Tools
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 (1,350,000) |
Torsional Limited |
KN·m (lbf-ft) |
13 (10,000) |
15 (11,000) |
20 (14,000) |
45 (33,000) |
Torsional Yield |
KN·m (lbf-ft) |
20 (14,000) |
25 (18,000) |
35 (25,000) |
60 (45,000) |
Overall Length |
mm (ft) |
6370 (20.9) |
7015 (23) |
7310 (24) |
7431 (24.4) |
Frequently Asked Questions (FAQ)
Q1: What manufacturing standards do TAKELO drilling jars comply with?
TAKELO drilling jars are engineered and manufactured in strict compliance with API Spec 7-1 industry standards.
Q2: How does the Hydraulic-Mechanical Double-Acting Jar operate?
The double-acting jar provides flexible impact release capabilities, allowing operators to deliver powerful jarring impacts in both upward and downward directions during stuck pipe situations.
Q3: Can TAKELO drilling jars withstand HPHT well conditions?
Yes. Built from quenched and tempered alloy steel forgings and verified by hydrostatic and non-destructive testing, they perform reliably in high-pressure and high-temperature (HPHT) environments.
Q4: What non-destructive testing (NDT) is conducted on these drilling jars?
All load-bearing sections undergo 100% Ultrasonic Testing (UT) and Magnetic Particle Inspection (MPI) to identify any internal or surface anomalies before deployment.
Q5: What sizes and tool joint connections are available?
Outer diameters range from 121 mm (4-3/4") to 229 mm (9"), equipped with standard API connections including NC38, NC50, 6-5/8 REG, and 7-5/8 REG.
Q6: What is the fatigue cycle threshold verified during functional testing?
Each functional test verifies fatigue endurance exceeding 5,000 impact strokes at full rated load to ensure dependable field life.