Main Products: Petroleum Equipments
API 7- 1 certificate Short Drill Collar ( 4 1/8"~9" ) Type DZT
USD $100 - $2,000 /Meter
Min.Order:1000 Meters
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Sinotai Petroleum Equipment Co., Ltd.
Credit Member 4 years 
Business Type: Trading Company
Shandong ChinaMain Products: Petroleum EquipmentsProduct Details
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") |
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