Drill stem subs and connections
The items are designed to join separate parts of the drill pipes with different threads.
|Normative documents||Technical Specifications TU 3668-263-07500243-2011, API Spec 7-1|
|Sub types||P - bottleneck
М - with box ends
N - with pin ends
1 - cylindrical
2 - stepped
|Tool joint threads||З – 65… З – 177. Thread connection of Premium Class - ТМК TDS|
|Threads||right-hand and left-hand|
|Types according to API||- lifting sub with tapered shoulders;
- lifting sub with straight shoulders;
- subs for drill strings of А, В, С type for rotary drilling.
Upon request, fitting and lifting connections for drill pipes, HWDP and BDC can be manufactured.
Catalogue Oilfield and drilling equipment download.
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