Downhole cementing tool assembly
Patent
·
OSTI ID:5451792
A cementing apparatus for use in cementing a casing string in a well bore is described comprising: (a) a float collar incorporated in the casing string, the float collar including a passage extending therethrough; (b) a cementing plug having a cylindrical body including an axial passage extending therethrough, the cementing plug body further including closure means extending across the axial passage; (c) a wiper plug having a cylindrical body including wiper means extending about the wiper plug body for wiping the casing as the wiper plug is advanced through the casing; (d) cooperative interlocking means located on the float collar, the cementing plug and the wiper plug for locking the cementing plug and the wiper plug to the float collar in a nonrotatable position; and (e) wherein the cementing plug and the wiper plug including frangible internal cutters embedded in the cementing plug and the wiper plug.
- Assignee:
- NOV; EDB-88-071653; NOV-88-001112
- Patent Number(s):
- US 4711300
- OSTI ID:
- 5451792
- Country of Publication:
- United States
- Language:
- English
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