SD型钻杆卡瓦适用的钻杆直径为23/8—7in(60.3-177.8mm)。按卡瓦牙与钻杆的接触长度分为短型(SDS)、中型(SDML)和加长型(SDXL)。SDS适用于浅井、SDML适用于中深井、SDXL适用于深井。产品按API Spec 7K要求设计制造。
型号
|
卡瓦体尺寸
|
31/2
|
41/2
|
5
|
SDS
|
钻杆直径
|
in
|
23/8
|
27/8
|
31/2
|
31/2
|
4
|
41/2
|
4
|
41/2
|
5
|
mm
|
60.3
|
73.0
|
88.9
|
88.9
|
101.6
|
114.3
|
101.6
|
114.3
|
127
|
重量
|
kg
|
53.1
|
50.3
|
48.5
|
64.9
|
61.7
|
57.6
|
82
|
79
|
75
|
lb
|
117
|
111
|
107
|
143
|
136
|
127
|
181
|
174
|
165
|
SDML
|
钻杆直径
|
in
|
23/8
|
27/8
|
31/2
|
31/2
|
4
|
41/2
|
4
|
41/2
|
5
|
mm
|
60.3
|
73.0
|
88.9
|
88.9
|
101.6
|
114.3
|
101.6
|
114.3
|
127
|
kg
|
87.5
|
85.3
|
81.6
|
94
|
90.3
|
85.3
|
92.5
|
88.9
|
84
|
lb
|
193
|
188
|
180
|
207
|
199
|
188
|
204
|
196
|
185
|
SDXL
|
钻杆直径
|
in
|
—
|
—
|
—
|
31/2
|
4
|
41/2
|
4
|
41/2
|
5
|
mm
|
—
|
—
|
—
|
88.9
|
101.6
|
114.3
|
101.6
|
114.3
|
127
|
kg
|
—
|
—
|
—
|
103.9
|
99.3
|
93
|
107.5
|
103
|
96.6
|
lb
|
—
|
—
|
—
|
229
|
219
|
205
|
237
|
227
|
213
|
型号
|
卡瓦体尺寸
|
51/2
|
57/8
|
7
|
SDS
|
钻杆直径
|
in
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
mm
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
重量
|
kg
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
lb
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
SDML
|
钻杆直径
|
in
|
41/2
|
5
|
51/2
|
—
|
53/4
|
57/8
|
—
|
65/8
|
7
|
mm
|
114.3
|
127
|
139.7
|
—
|
—
|
—
|
—
|
—
|
—
|
kg
|
101
|
97
|
92
|
—
|
—
|
—
|
—
|
—
|
—
|
lb
|
223
|
214
|
203
|
—
|
—
|
—
|
—
|
—
|
—
|
SDXL
|
钻杆直径
|
in
|
4
|
41/2
|
51/2
|
—
|
53/4
|
57/8
|
—
|
65/8
|
7
|
mm
|
114.3
|
127
|
139.7
|
—
|
146.05
|
149.2
|
—
|
168.3
|
177.8
|
kg
|
116
|
111
|
112
|
—
|
|
|
—
|
|
|
lb
|
256
|
245
|
247
|
—
|
|
|
—
|
|
|