Specifications
API 7-1 Oilfield Short Drill Collar Type DZThigh strength alloy steel
OD: 4 1/8"~9"
length:1.5m,2.5m, 3 m,3.5m
Short Drill Collar Type DZT
The short drill collar type DZT selects the special high strength alloy steel. It's properties meet the requirement of specification. The connection meets the the requirement of API specifications. It is mainly used for connecting special tools or constituting a certain number of drilling group.
Specification Series and Performance Parameters
Normal size specification Mm(in) | Connection API | Water hole Mm(in) | Length series M(ft) |
105 (4 1/8″) | NC31 | 50(2") | 1.5(4 9/10'), 2.5(8 1/5') 3(9 7/8'), 3.5(11 1/2'),
|
121 (4 3/4″) | NC35 | 50(2") | |
127 (5″) | NC38 | 57(2 1/4") | |
146 (53/4″) | 41/2FH | 57(2 1/4") | |
159 (61/4″) | NC46 | 71(2 4/5" ) | |
165 (6 1/2″) | NC46 | 71(2 4/5") | |
178 (7″) | NC50 | 71(2 4/5") | |
203(8″) | NC56 | 71(2 4/5") | |
229(9″) | NC61 | 71(2 4/5") |
