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DPDS Double Shoulder Drill Pipe

Using scope and technic characters: 

l         DPDS double shoulder drill pipe is designed for high torque drilling items, such as deep well, super deep well, directional well, and sidetracking drilling in well intervening.

l         The tool joint structure of double shoulder highly improves the torque capacity of thread without diminishing the inner diameter of pin tool joint and box tool joint.

l         Out shoulder provides the seal, and inner shoulder is to improve the high torque strength.


DPDS high torque tooljoint

Standard tooljoint

 

Feature of DPDS double shoulder: 

l          Improve the anti-torque capacity by 30%-50% compared to API standard

l          Highly improve the sealness and strength

l          Capable of the high-emission, high pumb pressure, high torque drilling

DPDS high torque tool joint:

 

Type

OD(In)

ID(In)

Length of pin thread(In)

Vice-ledge torque(Ft.ib)

Main ledge torque(Ft.ib)

Improve by(%)

DPDS26

3 3/8

1 3/4

3

2066

6875

30%

DPDS31

4 1/8
4 3/8

2
1 5/8

3 1/2
3 1/2

5020
7150

13389
17170

37%
42%

DPDS38

5
5
5

2 9/16
2 7/16
3 1/8

4
4
4

6428
7908
11174

20326
22213
26515

32%
36%
42%

DPDS40

5 3/8
5 1/4
5 1/2
6 1/2

2 7/16
2 9/16
2 1/4
2 7/16

4 1/2
4 1/2
4 1/2
4 1/2

11150
9623
13245
11150

29930
27760
32943
30114

37%
35%
40%
37%

DPDS46

6
6
6 1/4
6 1/4
6 1/4
6 1/4

3 1/4
3
3
2 3/4
2 1/2
2 1/4

4 1/2
4 1/2
4 1/2
4 1/2
4 1/2
4 1/2

10451
14898
14898
18860
22352
25389

33625
39229
39659
44871
49630
53936

31%
38%
38%
42%
45%
47%

DPDS50

6 5/8
6 5/8
6 5/8
6 5/8
6 5/8

3 3/4
3 1/2
3 1/4
3
2 3/4

4 1/2
4 1/2
4 1/2
4 1/2
4 1/2

10956
16678
21859
26513
30656

37676
44673
51447
57800
63406

29%
37%
42%
46%
48%

DPDS 5 1/2FH

7
7
7 1/4
7 1/4
7 1/2

3 3/4
3 1/2
3 1/2
3 1/4
3

5
5
5
5
5

25185
31214
29000
36672
41571

60338
60338
72480
76156
87341

42%
52%
41%
48%
48%

 

 

 

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