It is drill too necessary to control blowout pressures.
Technical Parameter
OD
Lefthand Thread
Pressure
XS-2-1/2
86
NC26
35Mpa,70Mpa
XS-3
105
NC31
XS-3-1/2
121
NC38
XS-4-1/4
168
NC50
XS-5-1/4
178
5-1/2FH X 5-1/2FH
203
6-5/8REGLH X 6-5/8REGLH
kelly cock
