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US 4,624,312 AGranted
Remote cementing plug launching system
AssigneeHalliburton Company
InventorKurt M. McMullin
Life of this patent
Estimating the term…
Abstract
The present invention comprises an improved remote cement plug launching system including guide tube means associated with the cementing plugs, which guide tube means are adapted to guide plug release darts to seats in said plugs.
Claims13
An improved remote cementing plug launching system, comprising:
- a first cementing plug releasably secured to a plug release assembly;
- a second cementing plug releasably secured to said first cementing plug;
- and
- collapsible guide tube means extending from said first cementing plug to a dart seat means in said second cement plug.
1 more element
An improved cementing plug adapted to downward movement during the cementing of a well comprising:
- a substantially cylindrical plug body having a plurality of annular wiper flaps disposed thereabout and a downward-facing cavity on the interior thereof;
- and
- guide tube means substantially axially disposed in said cavity of said plug body and extending downwardly therefrom, said guide tube means adapted to collapse upwardly into said cavity upon meeting an immovable obstruction during said downward movement.
An improved remote cementing plug release system, comprising:
- a plurality of cementing plugs releasably secured to each other and to a plug release assembly above the uppermost of said cementing plugs in a well bore;
- a dart seat means associated with each of said cementing plugs, each dart seat means having a greater diameter bore therethrough than the dart seat means immediately therebelow;
- a plurality of plug release darts, each dart sized to seat in one of said dart seat means in sealing engagement therein;
- and
- collapsible dart guide means extending between each said cementing plug and the cementing plug immediately therebelow.
2 more elements
Dependencies are inferred from the claim text.