Double Acting Hydraulic Drilling Jar (QYSZ)

• Customized: Customized
• Certification: ISO, Ns-1
• Direction: Bidirectional Drilling Jar
• Structure: Hydraulic
• Size(Inch): 4 3/4′′ ~ 9 1/2′′(Inch)
• Size(mm): 121mm ~ 141mm
• Model NO.: QYSZtype, 6"--36", API 7-1 AND NS-1
• Transport Package: Iron Frame
• Trademark: TIANHE
• Origin: Shanghai China
• Production Capacity: 50000PCS

Product Description

 
Product Description
The QYSZ type drilling jar is a kind of hydraulic jar that can be employed to release the drilling tools that are stuck. With this one-piece double acting hydraulic jar, a powerful force is available to the operator and ensures that normal drilling operations can be resumed as soon as possible.  

 

When operating the QYSZ type hydraulic jar, the operator can make adjustments to the jarring force and direction on the ground without the need to adjust the torque. The QYSZ jar is reliable and can be operated with ease. It can be applied widely in drilling, coring, fishing and cementing operations.   

 

 

Working principles 

Upward Jarring

Lifting the drill stem gives the hydraulic jar an upward force, moving the upper hydraulic mechanism along with it. This generates an increased pressure in the working fluid. Thus, when the jar reaches a predetermined stroke, the fluid pressure is released, creating an upward jarring force, releasing the stuck drill stem.   

 

 

Downward Jarring 

Downward force is applied on the hydraulic jar, to create pressure in the working fluid of the lower hydraulic mechanism. When the jar reaches a predetermined stroke, the fluid pressure is released, creating a downward jarring force to release the struck drill tools. 

Specifications - QYSZ Double Acting Hydraulic Drilling Jar 

Model	QYSZ121B	QYSZ159C	QYSZ165B	QYSZ172C	QYSZ178B	QYSZ203B	QYSZ241
Product Code	1808000	1810000	1811000	1812000	1813000	1815000	1817000
O.D. (mm)	121	159	165	172	178	203	241
I.D. (mm)	50.8	69	69	69	69	76.2	76.2
API Connection	NC38	NC46	NC50	NC50	NC50	6 5/8 REG	7 5/8 REG
Overall Length (mm)	9100	9450	9450	9450	8890	9700	9700
Total Weight (kg)	530	980	1020	1110	1290	1660	2400
Up Jarring Free Stroke (mm)	127	190	190	190	190	190	190
Down Jarring Free Stroke (mm)	165	190	190	190	190	190	190
Max. Up Jarring Force (kN)	350	700	700	700	800	1000	1250
Max. Down Jarring Force (kN)	200	350	350	350	400	500	650
Max. Tensile Load (kN)	1500	3750	3750	3750	4650	6650	7350
Working Pull Force (kN)	1000	2000	2000	2000	2400	2800	3500
Max. Torque Load (kN.m)	18	75	75	75	91	133	180
Working Torque (kN.m)	10	25	25	25	30	35	40
Pump Area (cm²)	18	26	26	26	51	58	78