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   The two-action drilling accelerator can be energized by hydraulic spring as to increase the jarring force for Hydraulic Jar. It should be applied with Hydraulic Jar jointly.  The drill collar and Hydraulic Jar (below the Drill Accelerator) can adopt an accelerated effect when jarring operates as for making the stuck point gain more jarring force. Meanwhile, decrease the bounce-back shock after jarring.


SPECIFICATIONS:


Model

SZJQ95

SZJQ121

SZJQ165

SZJQ165A

SZJQ197

SZJQ203

SZJQ241

Tool O.D. mmin

95
(3 3/4)

121
(4 3/4)

165
(6 1/2)

165
(6 1/2)

197
(7 3/4)

203(8)

241
(9 1/2)

Hole Diameter mmin

32(1 1/4)

50(2)

57(2 1/4)

70(2 3/4)

70(2 3/4)

70(2 3/4)

76(3)

Connection API

NC26

NC38

NC50

NC50

6 5/8REG

6 5/8REG

7 5/8REG

Max. Lifting Stroke
mmin

178
7

178
7

241
91/2

241
91/2

203
8

203
8

254
10

Max. Lowering Stroke
mmin

178
7

178
7

165
(6 1/2)

229
(9)

203
8

203
8

254
10

Hole Seal Pressure
Mpapsi

35
5000

35
5000

35
5000

35
5000

35
5000

35
5000

35
5000

Allowable Working Load kN(lbf)

600
135000

1100
(247000)

2000
(450000)

2000
(450000)

2600
(585000)

2600
(585000)

3500
(787000)

Yield Tension
kN(lbf)

800
180000

1560
350000

3750
(700000)

3100
(700000)

4000
(900000)

4000
(900000)

5800
(1300000)

Allowable Torque
kNqm(lbfft)

4
3000

15
11000

25
18400

25
18400

30
22100

30
22100

40
29500

Yield Torque
kNqm(lbfft)

8
6000

27
20000

75
(55300)

75
(55300)

100
73700)

100
73700)

180
(133000)

Overall Length
mmin

6651
261 7/8)

7185
282 3/4

7476
294 3/8

7476
294 3/8

8000
315

8000
315

7259
285 3/4

   The accelerator type YJQ is hydraulic and is essentially a fluid spring which stores energy when a strain is pulled on the fishing string. The tool is run in conjunction with a hydraulic fishing jar type Z or super fishing jar of the same size. It can absorb much of jarring shock to protect tools and strings from damages while strengthening the jarring force.

Specification Series and Performance Parameters

Type

O.D.
mm

I.D.
mm

Tool Joint
Connection
API

Overall Length
mm

Max. Tensile
load
KN

Max. Working Torque
kNm

Max.Overpull
KN

Max. Stroke
mm

GJ73

73

20

2 3/8TBG

2620

250

3

80100

218

GJ80

80

25.4

2 3/8REG

2845

300

3

90120

218

GJ89

89

28

NC26

2760

400

3.5

110150

218

YJQ36

95

32

NC26

2845

500

4

150200

330

YJQ40

102

32

NC31

3878

600

5

200250

330

YJQ108

108

32

NC31

3878

700

6

200250

330

YJQ44

114

38

NC31

3422

800

7

250300

216

YJQ4

121

38

NC38

3254

900

8

300350

234

YJQ62

159

57

NC50

4375

1500

13

600700

338

YJQ168

168

57

NC50

4375

1600

14

600700

338

YJQ7

178

60

NC50

4019

1800

15

700800

320

YJQ76

197

78

6 5/8REG

4238

2100

17

9001000

341

YJQ80

203

78

6 5/8REG

4238

2200

18

9001000

341

YJQ90

229

76

7 5/8REG

4180

2500

20

11001200

341

 
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