Specifications

1.Connect drill tool and worked with drill string
2.ZSJ type drilling up jar and ZXJ type drilling down jar

Function:

The drilling jar which is connected with drill tool and worked with drill string is a downhole stuck freeing tool in drilling operation.

 

Usage:

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.

 

Operation:

The up jarring section takes use of hydraulic mechanism, the jarring force can be adjusted according to up elevating load but can’t exceed the max. loading for tool load rated. The down jarring section takes use of mechanical friction mechanism, the jarring force is well pre-adjusted by adjusting device before put into downhole. No re-adjustment can be allowed after jar is put into downhole.

 

Detail Specification:

Technical specification and parameters for ZSJ/ZXJ type Drilling Jar
Item Parameters		ZSJ 80B ZXJ 80B	ZSJ 76B ZXJ 76B	ZSJ 70B ZXJ 70B	ZSJ 62B ZXJ 62B	ZSJ 56B ZXJ 56B	ZSJ 46B ZXJ 46B
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	5300
	Down	5250	5250	5215	5215	5000	4760
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	4 1/2FH	NC38
Max. tensile load(KN)		2500	2500	2300	2200	2000	1400
Max. Working Torque (N.m)		20 x 103	18 x 103	15 x 103	15 x 103	15 x 103	13 x 103
Rated release force for up jar (KN)		400~600	400~600	350~550	300~450	200~350	150~250
Max. up jarring released force (KN)		750	750	550	550	450	270
Max. down jarring released force (KN)		600	600	550	500	400	250
Weight(KG)	Up	1085	980	680	530	480	330
	Down	1027	920	645	520	457	310