CHINA SCOTON OILFIELD EQUIPMENT CO., LTD.

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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  • FAX:+86-029-62827812
  • EMAIL:sales@scotonpetro.com
  • ADDRESS:Hi-Tech Development zone, Xi'an China