Back to results
US 5,311,940 AGranted
Cementing plug
AssigneeLaFleur Petroleum Services, Inc.
InventorKarl K. LaFleur
Life of this patent
Estimating the term…
Abstract
Cementing plugs for use in the cementing of casing in oil and gas wells. The cementing plugs are well-suited for use with a polycrystalline diamond compact drill bit.
Claims2
A cementing plug comprising:
- a) a first body portion comprising solid polycrystalline diamond compact drillable material;
- b) a second body portion concentrically disposed about said first body portion and comprising polycrystalline diamond compact drillable material, said second body portion having a frustoconical first end, a cylindrical intermediate portion and a second end defining a flange, wherein said second body portion has a constant outside diameter except at said frustoconical first end thereof where said outside diameter tapers from said constant diameter to the outer surface of said first body portion;
- and
- c) a nose comprising polycrystalline diamond compact drillable material engaged with said first body portion adjacent said first end of said second body portion.
1 more element
Dependencies are inferred from the claim text.