|
US6945326B2
|
|
Non-rotating cement wiper plugs
|
|
WO9967499A1
|
|
Downhole guide member for multiple casing strings
|
|
US5095981A
|
|
Casing centralizer
|
|
US4825947A
|
|
Apparatus for use in cementing a casing string within a well bore
|
|
US4787244A
|
|
Well pipe or object depth indicator
|
|
BR8700248A
|
|
Coating tube center
|
|
CA1231642A
|
|
Casing centralizer/stabilizer
|
|
US4416547A
|
|
Portable proportioning device
|
|
CA1046757A
|
|
Device using a measuring wheel to measure the length of a moving pipe or other tubular member
|
|
US3972124A
|
|
Device for measuring the length of a member
|
