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      You are  >> All >> Jar >> Shock Sub >> Hydraulic Shock Sub Type YJ
 
  

 

  The Hydraulic Shock Sub type "YJ" is fully hydraulic and is used for reducing vibrations caused by hard formation drilling and keeping the drill bit firmly on the bottom, so that it helps to reduce drill string connection fatigue and prolong drill string life.

Specification Series and Performance Parameters:


Type

O.D.
(mm)

I.D.
(mm)

Overall Stoke
(mm)

Connection
API

Ambient
Temperature
(0C)

Max. Working Load
(KN)

Max. Tensile Load
(KN)

Max. Working Torque
(KNm)

YJ121

121

38

100

3 1/2REG

-40+150

260

980

10

YJ178

178

57

125

NC50

-40+150

390

1470

14.7

YJ203

203

68

140

6 5/8REG

-40+150

490

1960

19.6

YJ229

229

70

140

7 5/8REG

-40+150

540

1960

19.6

  The two-way shock sub type "SJ" is an effective shock absorbing device. It can be used to reduce or eliminate both transversal and longitudinal vibration of drill string, thus it helps maintain normal weight-on-bit (WOB) and torque, so that it helps to reduce drill string connection fatigue and prolong drill string life.

Specification Series and Performance Parameters :


Type

SJ 121

SJ 159

SJ165

SJ 178

SJ 203 III

SJ 229 III

SJ254

SJ279II

O.D.
mmin.

121
(4 3/4)

159
(6 1/4)

165
6 1/2

178
(7)

203
(8)

229
(9)

254
(10)

279
(11)

I.D.
mmin.

38
(1 1/2)

48
1 7/8

48
1 7/8

57
(2 1/4)

65
(2 1/2)

71.4
(2 13/16)

71.4
(2 13/16)

76.2
(3)

Max. Working Stroke
mmin.

100
(3.94)

120
4.72

120
4.72

120
(4.72)

120
(4.72)

140
(5.51)

120
(4.72)

160
(6.3)

Ambient Temperature

120~180

-40~150

-40~150

-40~150

-40~150

-40~150

-40~150

40~150

Max. Working Torque
kNm (Lbfm)

10
(2250)

15
(3375)

15
3375

15
(3375)

20
(4500)

20
(4500)

25
(5625)

30
(6750)

Max. Working Load
kN (Lbf)

300
(67500)

340
(76500)

340
(76500)

350
(78000)

450
(100000)

540
(121500)

600
(135000)

600
(1350000)

Max. Tensile
Load
MN (Lbf)

1.2
(270000)

1.5
(337500)

1.9
427500)

1.9
(427500)

1.96
(441000)

2.16
(486000)

2.54
(571500)

2.94
(661500)

Overall Length
mm (in.)

4208
(165.67)

5494
216.3

5494
216.3

5735
(213.19)

6080
(239.37)

6080
(239.37)

6400
(251.97)

5580
(219.69)

Connection
API

NC38

NC46

NC46

NC50

6 5/8 REG

7 5/8 REG

8 5/8 REG

8 5/8 REG

Average Rigidity kN/mm (Lbf/mm)

3.5
(787)

3.5
(787)

3.5
778

3.9
(877)

3.9
(877)

3.5
(787)

3.5
(787)

3.5
(787)

  The mechanical and hydraulic shock sub type "DHJ" is a two-function shock sub that absorbs the pulsate and shock from drill tools by dish spring and hydraulic oil to store the energy. It is used for reducing vibrations caused by hard formation drilling and keeping the drill bit firmly on the bottom, so that it helps to reduce drill string connection fatigue and prolong drill string life.

Specification Series and Performance Parameters :


Type

O.D. (mm)

I.D. (mm)

Overall Stroke (mm)

Max. Working Load
(mm)

Ambient
Temperature
()

Connection
API

Overall Length Extended
(mm)

DHJ121

121

38

100

40

- 40~150

31/2REG

3400

DHJ159

159

50.8

120

60

- 40~150

NC46

4210

DHJ 178

178

57

120

60

- 40~150

NC50

4210

DHJ203

203

71.4

140

70

- 40~150

65/8REG

4700

 
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