3. Drill Collar Transition joint's dimension and specification
|
O.D. (D1,Dm)
|
Chamfer angle diameter Df |
I.Dd |
Drill Pipe Joint's Code |
Bending Strength Ratio |
Basic Dimension |
Limiting Deviation |
Basic Dimension |
Limiting Deviation |
Basic Dimension |
Limiting Deviation |
79.4 |
+1.20 |
76.2 |
+0.4
-0.4 |
31.8 |
+1.60 |
ZTNC23-31 |
2.57:1 |
88.9 |
82.9 |
38.1 |
ZTNC26-35 (2³/8IF) |
2.42:1 |
104.8 |
+1.60 |
100.4 |
50.8 |
ZTNC31-41 (27/8IF) |
2.43:1 |
120.7 |
+2.0 |
114.7 |
ZTNC35-47 |
2.58:1 |
127.0 |
121.0 |
57.2 |
ZTNC38-50 (3¹/2IF) |
2.38:1 |
152.4 |
+3.20 |
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 |
+4.00 |
159.5 |
57.2 |
ZTNC46-67 (4¹/2IF) |
2.76:1 |
177.3 |
164.7 |
ZTNC50-70 (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-95 |
2.93:1 |
228.6 |
+4.80 |
212.7 |
ZTNC61-90 |
3.17:1 |
241.3 |
223.8 |
76.2 |
ZT75/8REG-95 |
2.81:1 |
247.6 |
+6.40 |
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 |
Note: Drilling collar's code is according to SY/T5144. |
4. Dimension of transition joint which connect with kelly and water tap (mm)
Upper end of kelly and lower end of water tap
|
|
|
|
Basic Dimension |
Limiting
Deviation |
Basic Dimension |
Limiting
Deviation |
Standard |
Choice |
Standard |
Choice |
Standard |
Choice |
196.8 |
146.0 |
+0.8
-0.8 |
186.1 |
134.5 |
+0.4
-0.4 |
6 5/8
REG |
4 1/2
REG |
196.8 |
146.0 |
+0.8
-0.8 |
186.1 |
134.5 |
+0.4
-0.4 |
6 5/8
REG |
4 1/2
REG |
|
|
|
|
I.D.d |
Type of the Kelly |
Specification of the Kelly in |
Basic Dimension |
Limiting
Deviation |
Basic Dimension |
Limiting
Deviation |
Basic Dimension |
Limiting
Deviation |
85.7 |
+0.8
-0.8 |
82.9 |
+0.4
-0.4 |
NC26 (2³/8IF) |
31.8 |
-1.60 |
Four Kellies |
2 1/2 |
104.8 |
100.4 |
NC31 (27/8IF) |
44.4 |
3 |
120.6 |
116.3 |
NC38 (3¹/2IF) |
57.2 |
3 1/2 |
158.8 |
145.3 |
NC46 (4IF) |
71.4 |
4 1/2 |
161.9 |
150.4 |
NC50 (4¹/2IF) |
177.8 |
170.7 |
5¹/2FH |
82.6 |
5 1/2 |
|
NC56 |
85.7 |
+0.8
-0.8 |
82.9 |
+0.4
-0.4 |
NC26 (2³/8IF) |
38.1 |
+1.60 |
Six Kellies |
3 |
104.8 |
100.4 |
NC31 (27/8IF) |
44.4 |
3 1/2 |
120.6 |
116.3 |
NC38 (3¹/2IF) |
57.2 |
4 1/2 |
158.8 |
145.3 |
NC46 (4IF) |
76.2 |
5 1/2 |
161.9 |
150.4 |
NC50 (4¹/2IF) |
82.6 |
5 1/2 |
177.8 |
170.7 |
5¹/2FH |
88.9 |
6 |
