Page 101 - Well Control for Completions and Interventions

Completion Equipment 93

Table 3.1 Wellhead and Christmas tree service tools
Valve removal plug On many wellheads, the outlet port for each
annulus is machined with an internal thread
profile. A valve removal plug can be screwed into
the profile sealing off the annulus. With a plug
set, the annulus gate valve can be safely removed.
To comply with standard barrier policy (two
barriers), annulus integrity would need to be
confirmed.
Valve removal tool The valve removal tool enables a valve removal plug
to be placed in the side outlet profile. Most
removal tools are designed to enable plugs to be
installed and recovered when there is annulus
pressure present.
Back pressure valve/ Most tree/wellhead designs have a profile machined
two-way check valve into the tubing hanger. A wireline set plug or
threaded back pressure valve placed in the hanger
profile allows the tree to be removed or tested,
and the drilling BOP be installed and tested.
Polished rod lubricator Used to install and remove threaded back pressure
valves in live wells.

Figure 3.5 Valve removal plug (left) and valve plug setting tool (right).

Figure 3.6 Polished rod lubricator—for setting/pulling tubing hanger plugs and
back pressure valves.