钻杆接头粗细扣规范
类
型
公称直径
数字型
接头外径
水
眼
螺纹种类
每寸牙数
锥
度
基面螺纹均直径
公接头
母接头
扣
型
螺纹小端外径
螺纹大端外径
扣
长
扣
型
螺纹始端外径
扩孔
直径
扣
长
英寸
d
d
2tgф
c
ds
dl
lpc
qc
lbc
数
字
型
nc23
4
1:6
59.817
52.400
65.100
76.2
59.83
66.7
92.1
nc35
89.687
79.096
94.971
95.2
89.69
96.8
111.11
nc44
112.192
98.425
117.475
114.3
112.2
119.1
130.2
nc56
1:4
142.646
117.500
149.250
127.0
143.98
150.8
142.9
nc61
156.921
128.600
163.525
139.7
158.25
165.1
155.6
nc70
179.146
147.650
185.750
152.4
180.48
187.3
168.3
nc77
196.621
161.950
203.200
165.1
197.93
204.8
181.0
正规
2 3/8
80
25.4
甲种
5
1:4
7°7´30′
60.080
2a31
47.625
66.675
76.2
2a30
61.423
68.3
92.1
2 7/8
95
32
69.605
231
53.975
76.200
88.9
230
70.948
77.8
104.8
3 1/2
108
38
82.293
331
65.075
88.900
95.3
330
83.635
90.5
110.1
4 1/2
140
58
113.800
431
90.475
117.475
108.0
430
112.211
119.1
123.8
5 1/2
172
70
乙种
4
1:4
132.944
531
110.058
140.208
120.7
530
133.630
141.7
136.5
6 5/8
197
89
丙种
1:6
146.248
631
131.030
152.197
127.0
630
145.601
154.0
142.9
7 5/8
225
102
乙种
1:4
170.549
731
144.475
177.800
133.4
730
171.235
180.2
149.2
8 5/8
254
131
194.731
831
167.843
201.982
136.6
830
195.417
204.4
152.4
贯眼
2 3/8
64
36.5
甲种
5
1:4
64.059
2a21
51.604
70.654
76.2
2a20
65.402
72.3
92.1
2 7/8
108
54
85.480
221
69.850
92.075
88.9
220
86.823
94.5
104.8
3 1/2
113
62
94.844
321
77.622
101.443
95.3
320
96.187
102.8
111.1
4
nc40
133
71
丁种
4
1:6
103.429
4a21
89.662
108.712
114.4
4a20
103.440
120.3
130.1
4 1/2
146
80
甲种
5
1:4
115.113
421
96.317
121.717
101.6
420
116.456
123.8
117.5
5 1/2
178
101
丙种
4
1:6
142.011
521
126.797
147.955
127.0
520
141.364
150.0
142.9
6 5/8
203
127
165.598
621
150.368
171.526
127.0
620
164.950
173.8
142.9
内平
2 3/8
nc26
86
44.5
丁种
4
1:6
4°45´48′
67.767
2a11
60.350
73.050
76.2
2a10
67.778
74.6
92.1
2 7/8
nc31
105
54
80.848
211
71.323
86.131
88.9
210
80.860
87.7
140.8
3 1/2
nc38
121
68.3
96.723
311
85.065
102.006
101.6
310
96.734
103.6
117.5
4
nc46
146
82.6
117.500
4a11
103.734
122.734
114.4
4a10
117.511
124.6
130.2
4 1/2
nc50
155
95.3
128.059
411
114.300
133.350
114.4
410
128.070
134.9
130.2
5 1/2
185
122
157.201
511
141.326
162.484
127.0
510
137.212
163.9
142.9
6 5/8
212
145
184.173
611
168.260
189.456
127.0
610
184.186
192.0
142.9