Specifications

1.ZJS type jar intensifier
2.A down hole fishing jar designed to increase jarring energy to up jar

Usage:

ZJS type jar intensifier is a down hole fishing jar designed to increase jarring energy to up jar. Therefore, it must run in conjunction with CSJ type super jar or YSJ type hydraulic up jar.

 

Function:

Its function is mainly to supply acceleration to the upper end of the jar during the free jarring stroke. With a special function, the intensifier is essentially a fluid spring which not only can accelerate the up jarring action but also make the jarring action directly to strike on the fish and reduce damages to the drill tool and fishing tool.

 

Detail Specification:

Technical specification and parameters for ZJS type Jar Intensifier
Type mm (in)	ZJS108 (ZJS42)	ZJS114 (ZJS44)	ZJS121 (ZJS46)	ZJS146 (ZJS56)	ZJS159 (ZJS62)	ZJS178 (ZJS70)	ZJS203 (ZJS80)
O.D.(mm)	108	114	121	146	159	178	203
I.D(mm)	32	38	38	51	57	57	70
Overall length of pull down (mm)	4200	3340	3340	4000	4500	4000	4010
stroke(mm)	330	250	250	330	330	310	330
Thread	NC31	NC31	NC38	NC40	NC50	NC50	6 5/8"REG
Max. tensile load downhole (KN)	700	800	900	1200	1500	1800	2200
Sealing pressure (Mpa.)	20	20	20	20	20	20	20
Pull down Full stroke force (tf)	32-38	25-30	30-35	35-40	60-65	75-85	62-670