Pipeline rehabilitation articulated gasketed-joint pipe

• US 5,261,461 A
• Filed: 08/16/1989
• Issued: 11/16/1993
• Est. Priority Date: 06/30/1987
• Status: Expired due to Fees

• Current Assignee: Chevron Research Company (Chevron Corp.)
• Original Assignee: Chevron Research Company (Chevron Corp.)
• Inventors: Smith, Harold R., Kemp, Eric E.
• Primary Examiner(s): Bryant, III, James E.
• Application Number:
  US07/394,462
• Time in Patent Office: 1,553 Days
• Field of Search: 138/97, 138/98, 138/120, 138/155, 138/105, 264/36, 405/150, 405/154, 277/207 A, 285/15, 285/31, 285/347, 285/114, 174/68.3, 174/111, 137/615
• US Class Current: 138/120
• CPC Class Codes: F16L 55/1657 lengths of rigid pipe being inserted F16L55/1658 takes precedence
• CPC Class Codes: F16L 55/18 Appliances for use in repairing pipes F16L55/10 takes precedence
• CPC Class Codes: Y10T 137/8807 Articulated or swinging flow conduit

Abstract

A liner pipe comprising sections of polyethylene pipe connected by articulated gasketed joints of bell and spigot design which are specifically adapted for ease of compression lining of large diameter pipe with minimum disruption to surface traffic and pipeline flow.

Claims

1. A sectional liner pipe for compression insertion in buried pipelines, comprising modules, said modules composed of several segments of liner pipe with gasketed joints between said segments, said joints being composed of a bell formed in one end of each segment, a spigot formed in the opposing end of each segment, and an annular gasket joining each said bell and spigot, wherein the outer diameter of said liner pipe is less than the inner diameter of said buried pipeline;

and said gasketed joints are capable of articulation but prevented from overarticulation during compression by several restraining cables attached to each segment which link adjacent segments at positions disposed around the circumference of each segment.

2. A liner pipe according to claim 1 wherein said bell and spigot are contacted in compression at a circumferential stop which said stop is beveled to prevent the spigot from moving into the bell past said stop.