Pipe joints or couplings – Safety release – With frangible or deformable element
Patent
1987-08-06
1989-05-02
Callaghan, Thomas F.
Pipe joints or couplings
Safety release
With frangible or deformable element
285 18, 285 96, 285900, F16L 3500
Patent
active
048262145
ABSTRACT:
A pipeline safety joint to provide a controlled point of weakness in at least one pipeline, said safety joint comprising a pair of tubular mandrels sized to be securable to a pipe-end of a pipeline, a portion of one mandrel being insertable into a part of the other mandrel thereof, to provide fluid communication between said pipe-ends. A latch mechanism on the portion of one mandrel is engagable with the part of the other mandrel, to hold said mandrel against axial separation. Retaining means on said one mandrel hold the latch mechanism in engagement. At least one seal assembly includes a metal sealing ring positioned to seal between a radially outer and inner substantially cylindrical surfaces on the mandrels. An annular cylinder and a co-operating annular piston formed on one mandrel and on a ring attached to the mandrel, to form a pressure compensation chamber surrounding said portion rings provide a fluid tight seal between said annular piston and cylinder. A fluid passage provides communication between the interior of said one mandrel and the compensation chamber, the seal assembly and the compensation chamber being dimensioned whereby forces produced to separate said mandrels of a pair of fluid pressure within the mandrels are equalized by the pressure compensation chamber. Frangible tubular bolts normally hold the mandrels in interengagement, break when a predetermined stress is applied thereto, the piston and cylinder then moving axially relative to one another to allow limited axial movement between said mandrels, sufficiently to permit the retaining means to move axially to release said latch mechanism. The interior is filled with a waterproof grease or jelly.
REFERENCES:
patent: 3057646 (1962-10-01), Brumagim
patent: 4059288 (1977-11-01), Mohr
patent: 4348039 (1982-09-01), Miller
patent: 4688827 (1987-08-01), Bassett
Callaghan Thomas F.
James Howden & Company Ltd.
LandOfFree
Pipeline safety joint does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pipeline safety joint, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pipeline safety joint will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-580158