Soft shock pressure plug
AssigneeBrown Oil Tools, Inc.
InventorJames W. Montgomery
Life of this patent
Estimating the term…
Abstract
The invention comprises a plug assembly for selectively closing and opening a flowway in a tubular conduit. The apparatus includes a seating body having a main passage and adapted to be mounted in the conduit with the main passage in register with the conduit flowway. The seating body defines a seat for receipt of a plug for closing the main passage and supporting a pressure differential across the seat. The apparatus further includes a release control mechanism operative upon the presence of a pressure differential across the seat in excess of a given magnitude to open a bypass passageway bypassing the seat and plug to permit a relatively slow decrease in the pressure differential across the seat.
Claims15
Releasable closure apparatus for selectively closing and opening a flowway in a tubular conduit comprising:
- a seating body having a main passage therethrough and adapted to be mounted in said tubular conduit with said main passage in register with said flowway, said seating body defining a seat for receipt of a plug member operative to close said main passage and support a pressure differential across said seat;
- release control means releasably connected to one of said seating body or said tubular conduit and releasable upon the presence of a pressure differential across said seat in excess of a first magnitude to open bypass passageway means bypassing said seat to permit a relatively slow decrease in said pressure differential;
- and lack means releasably locking said seating body to said tubular conduit, said lock means being releasable upon decrease of said pressure differential to a second magnitude to release said seating body from said tubular conduit.
Releasable closure apparatus for selectively closing and opening a flowway in a tubular conduit comprising:
- a mounting body adapted to be adjoined to said tubular conduit and to define a portion of the flowway thereof;
- a seating body having a main passage therethrough and defining a seat for receipt of a plug member operative to close said main passage and support a pressure differential across said seat;
- lock means interconnecting said bodies and operative in a locked position to releasably mount said seating body on said mounting body with said main passage positioned to register with the flowway of said tubular conduit, said bodies, when so interconnected by said lock means, defining bypass passageway means positioned to permit fluid flow through said flowway bypassing said seat and said plug;
- release control means operative in a first position with respect to one of said bodies to close said bypass passageway means and to maintain said lock means in said locked position, whereby, when said release control means is in said first position, and said plug member is received on said seat, said flowway may be closed;
- connecting means connecting said release control means to said one of said bodies in said first position and releasable upon presence of a pressure differential across said bypass passageway means greater than a first magnitude to permit relative movement between said release control means and said one of said bodies to a second position opening said bypass passageway means and freeing said lock means for potential movement from said locked position to an unlocked position to disconnect said bodies.
Dependencies are inferred from the claim text.