Hydraulic Jar Intensifier

The SYJS type jar intensifier is a type of downhole fishing jar designed to increase the top jar's jarring force. It runs in conjunction with either SQY Ztype hydraulic top jar or SCJ type super jar. Its main function is to supply acceleration to the upper end of the jar during the free jarring stroke. The intensifier is essentially a fluid spring that stores strain energy under compression. When the strain is removed, the stored energy is released, accelerating and intensifying the top jarring action. The top jarring action thus creates a direct impact on the fish. In addition, the fluid helps to absorb the shock from the rebounding drill string after the jarring stroke, protecting both the drill tools and fishing tools from damage.

Working Principle of Hydraulic Jar Intensifier

Normally, the jar intensifier is connected on top of drill collar and on the lower end of the drill stem. When the fishing tool engages with the fish, the drill tool is lifted. A large amount of energy was thus stored in the intensifier when the silicone oil in the top chamber of the piston was compressed. As the tool is lifted, when the top jar reaches it's free impact stroke, the stored energy in the jar intensifier is suddenly released, accelerating the drill collars and jars upward. When the top jar reaches its maximum stroke, a strong top jarring action will impact on the fish, resulting in one time jarring force .

The SYJS type jar intensifier is easy to assemble, operate and maintain . No high pressure pre - loading is required.

Specifications - SYJS Jar Intensifier

Parameter Model	SYJS31B	SYJS36B	SYJS42B	SYJS44B	SYJS46B	SYJS62B	SYJS64B	SYJS70B	SYJS76B	SYJS80B	SYJS90B
O.D. (mm)	79	95	108	114	121	160	165	178	197	203	229
I.D. (mm)	25.4	28	32	38	38	57	57	57	71.4	71.4	76
Overall length of pull down(mm)	2991	3110	3240	3340	3340	4500	4500	4000	4010	4010	4070
Stroke (mm)	215	215	250	250	250	330	330	310	330	330	330
Connection	2 3/8 REG	NC26	NC31	NC31	NC38	NC50	NC50	NC50	6 5/8 REG	6 5/8 REG	7 5/8 REG
Max. tension load downhole (kN)	300	550	700	800	900	1500	1500	1800	2100	2200	2500
Max. work torque (kN.m)	3	4	6	7	8	15	15	17	20	20	22
Sealing pressure (MPa)	30	30	30	30	30	30	30	30	30	30	30
Pull down Full stroke force (tf)	13~15	17~20	25~30	25~30	30~35	60~65	60~65	75~85	62~67	62~67	75~85
Weight(kg)	120	170	190	200	230	530	560	600	860	900	1030

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Hydraulic Jar Intensifier

Hydraulic Drilling Jar

Hydraulic-mechanical Drilling Jar

Working Principle of Hydraulic Jar Intensifier

Specifications - SYJS Jar Intensifier