VR Safety Joint
Xi'an ZZ Top Oil Tools Co.,Ltd is one of the top level vr safety joint manufacturers and suppliers,Website:, with professional factory, we are able to produce API and oilfield dst vr safety joint, open hole vr safety joint, well testing vr safety joint, welcome to contact us.
Briefly Introduce:
VR Safety joint is a compact, right-hand safety joint used in the drill stem testing string. It is run immediately above the
packer assembly to ensure that a minimum number of tools are left in the hole if it becomes necessary to release the
safety joint. The tool’s bypass feature acts as an auxiliary to the Hydro spring tester bypass to allow fluid to pass
though the packer while the work string is being pulled out of the hole.
A spline and lug arrangement, joining the male and female parts of the left-hand safety joint thread, lock to prevent
unintentional back-off from the tool during normal manipulation of the drill pipe during testing. Because of the spline
and lug configuration, the slips must be dropped in place before the drill pipe is lowered after every stand of pipe is
pulled out of the hole.
Features
*Operate the testing string from both ends to make sure the tool can move up and down in 210mm at least.
*Make the limited position on the testing string.
Specification
Size/in
OD/
mm
ID/
mm
Working
pressure
/ Mpa
Service
environment
Working
temperature
Connection
3 7/8”
98.5
45
70
105
Mud, Crude Oil,
Natural gas with
H2S and acid
--29oC ~
+204oC
EUE
IF
CAS
5"
127.5
57
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