초록 ▼

A cementing tool assembly comprises a float collar, a cementing plug, and a wiper plug having interconnecting locking ends. The cementing tool assembly is non rotatable in the casing and includes internal frangible cutters which are breakable in compression to aid the shredding of the cementing tool

A cementing tool assembly comprises a float collar, a cementing plug, and a wiper plug having interconnecting locking ends. The cementing tool assembly is non rotatable in the casing and includes internal frangible cutters which are breakable in compression to aid the shredding of the cementing tool assembly upon completion of the cementing operation.

대표청구항 ▼

A cementing apparatus for use in cemeting a casing string in a well bore, comprising: (a) a float collar incorporated in the casing string, said float collar including a passage extending therethrough; (b) a cementing plug having a cylindrical body including an axial passage extending therethrough,

A cementing apparatus for use in cemeting a casing string in a well bore, comprising: (a) a float collar incorporated in the casing string, said float collar including a passage extending therethrough; (b) a cementing plug having a cylindrical body including an axial passage extending therethrough, said cementing plug body further including closure means extending across said axial passage; (c) a wiper plug having a cylindrical body including wiper means extending about said wiper plug body for wiping the casing as said wiper plug is advanced through the casing; (d) cooperative interlocking means located on said float collar, said cementing plug and said wiper plug for locking said cementing plug and said wiper plug to said float collar in a nonrotatable position; and (e) wherein said cementing plug and said wiper plug including frangible internal cutters embedded in said cementing plug and said wiper plug.