DU系列转盘卡瓦由DU型、DUL型和SDU型三种型式的转盘卡瓦组成,该卡瓦扣合范围广、重量轻,其中SDU型卡瓦背锥接触面大、强度高,产品按API Spec 7K要求设计制造。
型号
|
卡瓦体尺寸
|
41/2
|
DU
|
钻杆直径
|
in
|
23/8
|
27/8
|
31/2
|
4
|
41/2
|
mm
|
60.3
|
73.0
|
88.9
|
101.6
|
114.3
|
DUL
|
钻杆直径
|
in
|
23/8
|
27/8
|
31/2
|
4
|
41/2
|
mm
|
60.3
|
73.0
|
88.9
|
101.6
|
114.3
|
SDU
|
钻杆直径
|
in
|
—
|
—
|
—
|
—
|
—
|
mm
|
—
|
—
|
—
|
—
|
—
|
型号
|
卡瓦体尺寸
|
51/2
|
DU
|
钻杆直径
|
in
|
31/2
|
4
|
41/2
|
5
|
51/2
|
mm
|
88.9
|
101.6
|
114.3
|
127
|
139.7
|
DUL
|
钻杆直径
|
in
|
3.1/2
|
4
|
4.1/2
|
5
|
5.1/2
|
mm
|
88.9
|
101.6
|
114.3
|
127
|
139.7
|
SDU
|
钻杆直径
|
in
|
31/2
|
4
|
41/2
|
5
|
51/2
|
mm
|
88.9
|
101.6
|
114.3
|
127
|
139.7
|
型号
|
卡瓦体尺寸
|
7
|
DU
|
钻杆直径
|
in
|
41/2
|
5
|
51/2
|
65/8
|
7
|
mm
|
114.3
|
127
|
139.7
|
168.3
|
177.8
|
DUL
|
钻杆直径
|
in
|
—
|
—
|
—
|
—
|
—
|
mm
|
—
|
—
|
—
|
—
|
—
|
SDU
|
钻杆直径
|
in
|
41/2
|
5
|
51/2
|
65/8
|
7
|
mm
|
114.3
|
127
|
139.7
|
168.3
|
177.8
|