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Casing Head Body Retrievable Wear Bushing Retrieving Tool, BOP Test Plug Back Pressure Valve |
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Casing Head Body Retrievable Wear Bushing (PRWB)
These retrievable wear bushings (PRWB) protect the inner
containers of casing head bodies or spools during drilling
operations.
When wear bushings are used, either hold down screws in the
top flange of the casing head body or hold down flanges with
hold down screws are required.
Retrieving Tool (PRT)
This tool (PRT) is meant for retrieving the wear bushing
described above. It is inserted in the slot provided in the wear
bushing top surface, rotated and then pulled up with the tools.
BOP Test Plug (PTP)
These plug Testers fit all nominal sizes of casing head bodies
and tubing heads and are available with any standard tool
joint.
The test plugs are assembled in the drill string and lowered to
its seat in the casing head body or tubing head. Pipe rams of
the preventors are then closed and hydraulic test pressure is
applied below the rams.
Blind rams can be tested in the same manner after removing
the drill string.
Back Pressure Valve (PBPV)
Tubing hanger bushing are furnished with female lift and
suspension threads and are machined to accommodate the
type (PBPV) back pressure valve as shown in the figure.
With Blowout Preventor equipment attached to the tubing
head body, the tubing is run to the desired depth and the
bushing, with the type (PBPV) back pressure valve installed,
is made-up on the landing joint.
The wrap around hanger is then latched around the tubing
below the hanger bushing and lowered thru the BOP to its
position in the tubing head body by means of a landing joint.
After making sure that the hanger have fully landed in the
head, hold down screws are fully tightened to compress the
packing and secure it in place. Thereafter the landing joint &
BOP may be removed.
Attach the landing joint and raise the tubing enough to install a
spider and slips. With tubing weight on the slips, remove
landing joint.
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