Specifications

1. ZSJ76B ZXJ76B drilling jar
2.API 7-1
3.first selected tool for directional well, complicated well and deep well

1.

Model parameter		ZSJ80B ZXJ80B	ZSJ76B ZXJ76B	ZSJ70B ZXJ70B	ZSJ62B ZXJ62B	ZSJ56B ZXJ56B	ZSJ46B ZXJ46B
O.D.(mm)		203	197	178	160	146	121
Hole(mm)		71.4	71.4	70	57	57	51
overall length (mm)	up	5515	5515	5424	5360	5730	5300
	down	5250	5250	5215	5215	5000	4760
Overall trip(mm)	up	368	368	344	344	332	305
	down	178	178	178	178	180	178
Connection thread API		6 5/8 REG	6 5/8 REG	NC50	NC46	4 1/2 FH	NC38
Max tensile load (KN)		2500	2500	2300	2200	2000	1400
Max torque (N.m)		20×103	18×103	15×103	15×103	15×103	13×103
up jarring standard release force (KN)		400~600	400~600	350~550	300~450	200~350	150~250
Max up jarring release force (KN)		750	750	550	550	450	270
Max down jarring release force (KN)		600	600	550	500	400	250

2

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

.