Non-magnetic drill string adapter
The drill string adapter is made of AISI4145H Cr-Mo steel and follows API Specifications. The Company can produce same-diameter, reducing and left lateral drill string adapters and can perform cold rolling, coppering or phosphating of threads.
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Product Details
The Company possesses a complete set of petroleum drilling tool production lines and mainly produces large deep-hole boring machines, ordinary lathes, CNC lathes, mill, printer, etc. The Company has established a dedicated testing center that is equipped with domestic and overseas advanced precision testing equipment and sound testing means to control the whole process of products and strictly abides by API 7-1, API 7-2, SY/T5144 and SY/T5146 standards to ensure that all performance indexes of the Company’s products can meet international standards and standards of American Petroleum Institute (API). The Company has passed IS09001 quality management system certification and HSE management system certification and has obtained the right to use the logos of API petroleum drilling tools. Main drilling tools include non-magnetic drill collar, non-magnetic pressure drill pipe, ordinary drill collar, integrated heavy weight drill pipe, adapter, etc. The annual production capacity is 10,000 pieces. The Company can also machine products according to special requirements of users.
| Sort | Name | Top Connectio | Bottom Connection | Type |
| 1 | Kelly saver sub | Kelly | Drill pipe | A or B |
| 2 | Tool joint | Drill pipe | Drill pipe | A or B |
| 3 | Crossover sub | Drill pipe | Drill collar | A or B |
| 4 | Drill collar sub | Drill collar | Drill collar | A or B |
| 5 | Bit sub | Drill collar | Bit | A or B |
| 6 | Swivel sub | Swivel bottom sub | Kelly | Type C |
| 7 | Junk sub | Kelly | Drll pipe | Type C |
| Drill pipe | Fishing tool | Type C |
Note: When the diameter difference of the drill tool connected by the conversion joint is greater than 15mm(except for the water conversion joint and the fishing conversion joint), the A or B conversion joint can be used when the well depth is less than or equal to 2000m; the B conversion joint should be used when the well depth is greater than 2000m.
Mechanical properties of converters
| Outer diameter dimension mm(in) |
（σb） Mpa Tensile strength |
σ0.2 Mpa Yield strength |
84 Elongation |
AKV J Impact |
HB Brinell Hardnes |
| 79.4-175(31/8-67/8) | ≥965 | ≥760 | ≥13 | ≥54 | ≥285 |
| 178-254(7-10) | ≥930 | ≥690 | ≥277 |
Dimensions of converters for connecting drill pipe
| Drill pipes |
外径OD (DL，DM，DU) |
Df Bevel Diameter |
ID |
Type | Bending strength ration | ||||
| Size | Grade | Basic size | Limiting deviation | Basic size | Limiting deviation | Basic size | Limiting deviation | ||
|
60.3 |
E |
85.7 |
±0.8 |
83.0 |
±0.4 |
44.5 |
+0.4
-0.8 |
NC26-E(23/8IF-E) |
1.10 |
|
X |
NC26-X(23/8IF-X) |
0.87 |
|||||||
|
G |
NC26-G(23/81F-G) |
0.79 |
|||||||
|
73.0 |
E |
104.8 |
100.4 |
54.0 |
NC31-E(27/8IF-E) |
1.03 |
|||
|
X |
50.8 |
NC31-X(27/8IF-X) |
0.90 |
||||||
|
G |
NC31-G(27/8IF-G) |
0.82 |
|||||||
|
S |
111.1 |
41.3 |
NC31-5(27/BIF-5) |
0.82 |
|||||
|
88.9 |
E |
120.7 |
116.3 |
68.3 |
NC38-E(31/81F-E) |
0.98 |
|||
|
X |
127.0 |
65.1 |
NC38-X(31/8IF-X) |
0.87 |
|||||
|
G |
61.9 |
NC38-G(31/8IF-G) |
0.86 |
||||||
|
S |
54.0 |
NC3B-S(31/BIF-S) |
0.80 |
||||||
|
E |
65.1 |
NC38-E(31/8IF-E) |
0.97 |
||||||
|
X |
61.9 |
NC38-X(31/81F-X) |
0.83 |
||||||
|
G |
54.0 |
NC38-G(31/8IF-G) |
0.90 |
||||||
|
5135 |
139.7 |
127.4 |
57.2 |
NC40-G(4FH-G) |
0.87 |
||||
|
101.6 |
E |
152.4 |
±0.8 |
145.0 |
±0.4 |
82.6 |
+0.4
-0.8 |
NC46-E(4IF-E) |
1.23 |
|
X |
NC46-X(41F-X) |
0.97 |
|||||||
|
G |
NC46-G(4IF-G) |
0.88 |
|||||||
|
5 |
76.2 |
NC46-S(4IF-S) |
0.81 |
||||||
|
114.3 |
E |
168.3 |
154.0 |
95.3 |
NC50-E(41/2IF-E) |
1.23 |
|||
|
X |
NC50-X(41/2IF-X) |
0.97 |
|||||||
|
G |
NC50-G(41/2IF-G) |
0.88 |
|||||||
|
S |
88.9 |
NC50-5(41/2IF-S) |
0.81 |
||||||
|
E |
92.1 |
NC50-E(41/2IF-E) |
1.02 |
||||||
|
X |
88.9 |
NC50-X(41/2IF-X) |
0.96 |
||||||
|
G |
NC50-G(41/2IF-G) |
0.86 |
|||||||
|
S |
76.2 |
NC50-5(41/2IF-S) |
0.87 |
||||||
|
127.0 |
E |
168.3 |
±0.8 |
154.0 |
±0.4 |
95.3 |
+0.4
-0.8 |
NC50-E(41/2IF-E) |
0.92 |
|
X |
880 |
NC50-X(41/2IF-X) |
086 |
||||||
|
G |
82.6 |
NC50-G(41/2IF-G) |
0.89 |
||||||
|
S |
69.9 |
NC50-5(41/2IF-S) |
0.86 |
||||||
|
E |
88.9 |
NC50-E(41/21F-E) |
0.86 |
||||||
|
X |
76.2 |
NC50-X(41/2IF-X) |
0.86 |
||||||
|
G |
69.9 |
NC50-G(41/2IF-G) |
0.87 |
||||||
|
139.7 |
E |
177.8 |
170.7 |
95.3 |
51/2FH-E |
1.53 |
|||
|
X |
51/2FH-X |
1.21 |
|||||||
|
G |
51/2FH-G |
1.09 |
|||||||
|
S |
184.2 |
88.9 |
51/2FH-S |
0.98 |
|||||
|
E |
177.8 |
51/2FH-E |
1.21 |
||||||
|
X |
51/2FH-X |
0.95 |
|||||||
|
G |
184.2 |
51/2FH-G |
0.99 |
||||||
|
S |
82.6 |
51/2FH-S |
0.83 |
||||||
Dimensions of converters for connecting drill collars
|
OD(DL，DM) |
Chamfer diameter DF |
ID |
Drill collar code | Bending ratio | |||
| Basic size | Limit deviation | Basic size | Limit deviation | Basic size | Limit deviation | ||
|
79.4 |
+1.2 0 |
76.2 |
±0.4 |
31.8 |
+1.6 0 |
ZTNC23-31 |
2.57:1 |
|
88.9 |
82.9 |
38.1 |
ZTNC26-35(23/8IF) |
2.42:1 |
|||
|
104.8 |
+1.6 0 |
100.4 |
50.8 |
ZTNC31-41(27/8IF) |
2.43:1 |
||
|
120.7 |
+2.0 0 |
114.7 |
ZTNC35-47 |
2.58:1 |
|||
|
127.0 |
121.0 |
57.2 |
ZTNC38-50(31/21F) |
2.38:1 |
|||
|
152.4 |
+3.2 0 |
144.5 |
ZTNC44-60 |
2.49:1 |
|||
|
71.4 |
|||||||
|
158.8 |
149.2 |
57.2 |
ZTNC44-62 |
2.84:1 |
|||
|
150.0 |
71.4 |
ZTNC46-65(4IF) |
2.91:1 |
||||
|
165.1 |
154.8 |
57.2 |
ZTNC46-65(4IF) |
2.63:1 |
|||
|
71.4 |
|||||||
|
171.4 |
+4.0 0 |
159.5 |
57.2 |
ZTNC46-67(4IF) |
2.76:1 |
||
|
177.3 |
164.7 |
ZTNC50-67(41/2IF) |
3.05:1 |
||||
|
71.4 |
|||||||
|
184.2 |
169.5 |
ZTNC50-72(41/2IF) |
3.18:1 |
||||
|
196.9 |
185.3 |
ZTNC56-77 |
2.70:1 |
||||
|
203.2 |
190.1 |
ZTNC56-80 |
3.02:1 |
||||
|
209.4 |
195.7 |
ZT65/8REG-82 |
2.93:1 |
||||
|
228.6 |
+4.8 0 |
212.7 |
ZTNC61-90 |
3.17:1 |
|||
|
241.3 |
223.8 |
76.2 |
ZT75/8REG-95 |
2.81:1 |
|||
|
247.6 |
+6.4 0 |
232.6 |
ZTNC70-97 |
2.57:1 |
|||
|
254.0 |
237.3 |
ZTNC70-100 |
2.81:1 |
||||
|
279.4 |
266.7 |
ZTNC77-110 |
2.84:1 |
||||
Dimensions for converters connecting kelly pipe to water
|
OD |
Chamfer diameter DF | Thread designation | |||||
| Basic size | Limit deviation | Basic size | Limit deviation | Standard | Select | ||
| Standard | Select | Standard | Select | ||||
|
196.8 |
146.0 |
±0.8 |
186.1 |
134.5 |
±0.4 |
6 5/8 REG |
4 1/2 REG |
|
196.8 |
146.0 |
±0.8 |
186.1 |
134.5 |
±0.4 |
6 5/8 REG |
4 1/2 REG |
| Bottom end of kelly pipe | Inside diameter ID | Kelly type | Kelly specifications | |||||
| Outer diameter DLR | Chamfer diameter DF | Thread designation | ||||||
| Basic size | Limit deviation | Basic size | Limit deviation | Basic size | Limit deviation | |||
|
85.7 |
±0.8 |
82.9 |
±0.4 |
NC26(2 3/8IF) |
31.8 |
+1.60 |
Square drill pipe |
2 1/3 |
|
104.8 |
100.4 |
NC31(2 7/8IF) |
4.4 |
3 |
||||
|
120.6 |
116.3 |
NC38(3 1/2IF) |
57.2 |
3 1/2 |
||||
|
158.8 |
145.3 |
NC46(4IF) |
71.4 |
4 1/2 |
||||
|
161.9 |
150.4 |
Nc50(4 1/2IF) |
||||||
|
177.8 |
170.7 |
5 1/2FH) |
82.6 |
5 1/2 |
||||
|
171.0 |
NC56 |
|||||||
|
85.7 |
±0.8 |
82.9 |
±0.4 |
NC26(2 3/8IF) |
38.1 |
+1.60 |
A hexagonal drill pipe |
3 |
|
104.8 |
100.4 |
NC31(2 7/8IF) |
44.4 |
3 1/2 |
||||
|
120.6 |
116.3 |
NC38(3 1/2IF) |
57.2 |
4 1/2 |
||||
|
158.8 |
145.3 |
NC46(4IF) |
76.2 |
5 1/2 |
||||
|
161.9 |
150.4 |
NC50(4 1/2IF) |
82.6 |
|||||
|
177.8 |
170.7 |
5 1/2FH) |
88.9 |
6 |
||||
|
171.0 |
NC56 |
|||||||
The chamfer diameter of the converter connecting the bit
| Chamfer diameter DF | Adapter thread code | |
| Basic size | Limit deviation | |
|
77.4 |
±0.4 |
2 3/8REG |
|
91.7 |
2 7/8REG |
|
|
104.4 |
3 1/2REG |
|
|
135.3 |
4 1/2REG |
|
|
165.1 |
5 1/2REG |
|
|
186.9 |
6 5/8REG |
|
|
215.1 |
7 5/8REG |
|
|
242.5 |
8 5/8REG |
|
Surface roughness
| Pin shoulder face | box shoulderface | thread working surface | thread crest surface |
|
Ra≤3.2 |
Ra≤3.2 |
Ra≤6.3 |
Ra≤12.5 |
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