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ZSJ /ZXJ Type Full Mechanical Drilling Jar

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ZSJ /ZXJ Type Full Mechanical Drilling Jar

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Category： Drilling_Jar

Key words：Drilling_JarZSJ /ZXJ Type Full Mechanical Drilling Jar

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The drilling jar which is connected with drill tool and worked with drill string is a downhole stuck freeing tool in drilling operation .It is a first selected tool for directional well,complicated well and deep well.The drilling jar is consisting of ZSJ type drilling up jar and ZXJ type drilling down jar,both they can be used mutually or operated separately .The up jarring section takes use of hydraulic mechanism,the jarring force can be adjusted according to up elevating load but can not exceed the max.load for tool load rated .The down jarring section takes use of mechanical friction mechanism, the jarring force is well preadjusted by adjusting device before put into downhole.No re-adjustment can be allowed after jar is put into downhole.

Up jarring test data

Type	ZSJ80	ZSJ76	ZSJ70	ZSJ62	ZSJ56	ZSJ46
Rated release force(KN)	400~600	400~600	350~550	300~450	200~350	150~250

Down jarring test data

Type	ZXJ80	ZXJ76	ZXJ70	ZXJ62	ZXJ56	ZXJ46
Max.release force(KN)	600	600	550	500	400	250

Thechnical specifications and parameters

Type Parameters Item		ZSJ 80 ZXJ 80	ZSJ 76 ZXJ 76	ZSJ 70 ZXJ 70	ZSJ 62 ZXJ 62	ZSJ 56 ZXJ 56	ZSJ 46 ZXJ 46
O.D.(mm)		203	197	178	160	146	121
I.D(mm)		71.4	71.4	70	57	57	51
Pull down overall length (mm)	Up	5515	5515	5424	5360	5730	5270
	Down	5250	5250	5215	5208	5000	5125

Pull down stroke(mm)	Up	368	368	344	344	332	305
	Down	178	178	178	178	180	178
Thread conn. API		6 5/8"REG	6 5/8"REG	NC50	NC46	6 5/8"REG	NC38
Max.tensile load(KN)		2500	2500	2500	2500	2500	2500
Max.Working Torque(N.m)		20*103	18*103	15*103	15*103	15*103	13*103
Weight(KG)	Up	1085	980	680	530	480	330
	Down	1027	920	645	520	457	310