Union Oil Company of California

Union Oil Company of California, Dba Unocal

William M Rickard

William C Allen

Daniel P Hoyer

David E Stikkers

Douglas P Bouche

Matthew L Kelley

Stephen Pye

Matthew J Kelley

A multi-piece, pipe joint seal has a slidable interface between seal pieces. The slidable interface allows for slippage between pieces during pipe joint assembly and disassembly, minimizing rotational and other stresses on the seal pieces and pipe sealing surfaces which may damage or endanger the deformable seal. The slidable interface seal is especially useful for joining brittle-lined pipe sections handling harsh fluids.

Dual gasket lined pipe connector

A butt welded and lined flange connector allows the joining of pipe sections lined with a brittle material. Spacing and a sleeved liner at the weld end protects the liner during butt welding. A conventional flange face gasket is modified to protrude into the lined zone to perform a dual sealing function. Like conventional flanged joints, the modified gasket forms a seal sandwiched between the flange interface surfaces. However, departing from current practice, the single gasket also fills the gap and seals the liner edges, protecting the pipe sections from the flowing materials. The invention avoids separate putty-like or elastomeric liner seals as well as exotic liner surface configurations. The present invention is expected to be tolerant of severe conditions and cost effective in many applications.

Lined pipe connection device and method

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Palm Desert, CA, United States of America

William M Rickard