PRESENT CENTRALIZER PLATE Old Part Number 31420265
The old centralizer plate was designed to press an “O” ring down on a shoulder inside the centralizer housing to create a seal. This produces side-pressure on the plate when installed, from the “O” ring pressing against the shoulder. The side pressure makes it difficult to properly install the snap ring which holds the plate in place. The ring does not readily open out all the way into the snap ring groove in the housing and may not be fully expanded into place. One needs to use a driver to hammer the snap ring into the groove to be sure it is seated properly. If this is not done correctly there is a possibility the snap ring could come loose and allow the plate to blow out of the centralizer housing. Old plates can still be used however the mechanic must make sure to use a driver to properly seat the snap ring all the way down into the snap ring groove.
NEW CENTRALIZER PLATE New Part Number 31420265SP
PHQ has changed the design of the centralizer plate to improve the seal between the centralizer plate and the centralizer housing. An “O” ring groove is cut in the side of the plate around the outer circumference of the plate. The groove will take the same “O” ring as is presently used. Now the “O” ring is pressed between the inside of the centralizer housing and the side of the plate to provide a seal. The new plate has a thickness made to fit onto the shoulder in the housing but leave enough room for the snap ring to be easily installed. There is no side-pressure on the snap ring so it quickly opens out to snap fully into place. A driver is not needed to seat it properly in the groove. These new plates replaced the old plates in all new centralizers shipped from PHQ, from May 8, 2001 forward. The price of the plate did not change.
Centralizer - Specifications
PHQ10 Universal Centralizers are customized to fit most makes of Long-hole Drill Assemblies
* Includes removable 6 inch stinger point ** 1775 pound/foot2 per side
|Drill & Feed Model Centralizer Part Number||Width||Height||Length||Extension||Weight||JawForce @100psi||Drill Steel|
|PR123 on MA2MSUB PHQ10GD – Low Web or Undercut Shell||11.25 in 286 mm||130 lbs. 59 kg||1 in 25 mm|
|PR123 on MA2MS PHQ10GDH -High Web Shell||11.5 in||14.75 in 375 mm||39 in * 990 mm||140 lbs. 63 kg||**||1.25 in 32 mm|
|BBC120 on BMS PHQ10AC||292 mm||12.5 in 318 mm||33 in 838 mm||12 in 305 mm||125 lbs. 57 kg||3550 p/ft2||1.5 in 38 mm|
|S36IR on Mk V PHQ10S||11.75 in 298 mm||120 lbs 54 kg|