Drilling Jar Type BZ is full mechanical type drilling jar and releasing stuck tool. The Drilling Jar integrates the upward jarring with the downward jarring so that it can release from the tight pull or the sticking etc. during drilling. The load(jarring force)scope of the upward jarring and the downward jarring is so wide that it can be adjusted in the maintenance station or in the well site according to the requirement. The special flexible joint can reduce the flexural stress of the drilling jar body efficiently. So it is the first selected drilling jar for vertical well, deep sell, directional well and complicated well operations.

Type	O.D.	I.D.	Connection	Max. Upward  Jarring Force	Max. Downward  Jarring Force	OAL
	(mm/inch)	(mm/inch)	API	KN	KN	(mm/inch)
BZ121	121(4-3/4)	50.8(2)	NC38	450	230	6356(250)
BZ159	159(6-1/4)	57.2(2-1/4)	NC50	630	360	7265(286)
BZ165	165(6-1/2)	57.2(2-1/4)	NC50	630	360	7265(286)
BZ196	196(7-3/4)	71.4(2-13/16)	6-5/8REG	820	460	7062(287)
BZ203	203(8)	71.4(2-13/16)	6-5/8REG	820	460	7062(287)
When ordering or requesting quotation, if size out of above specification, pls. specify clearly.