Pipe joints or couplings – With casing – lining or protector
Patent
1987-03-23
1988-10-11
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
285 55, 285286, 285293, 285294, 29458, 1562751, F16L 1112
Patent
active
047766131
ABSTRACT:
A pipe joint weld collar and method of installation is disclosed for an offshore oil/gas pipeline for covering contiguous end portions of a pair of pipes joined together by a metal weld. A coating of a high specific gravity material, such as concrete or the like is applied to the outer periphery of the pair of pipes to prevent floating of the pipes when oil or gas of less density than water is transported therethrough. The contiguous welded end portions of the pipes are void of concrete to form a peripheral recess or cutback providing access to the pipe end portions for welding. The collar comprises a plastic sheet spanning the recess and wrapped around the end portions of the coating for covering the recess. Clamp bands are placed around the wrapped sheet to prevent movement thereof on the concrete coatings and to hold the sheets in position for tack welding. The clamped and tack-welded sheet is permanently secured to end portions of the coating by a plastic weld securing one sheet end portion to the overlapped end sheet portion.
REFERENCES:
patent: 3297819 (1967-01-01), Wetmore
patent: 3628814 (1971-12-01), Hallwood
patent: 4103505 (1978-08-01), Howerton
patent: 4172607 (1979-10-01), Norton
patent: 4629216 (1986-12-01), Pedersen
Dickey David R.
Price James M.
Arola Dave W.
SLT North America Inc.
LandOfFree
Pipe joint weld collar and method of installation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pipe joint weld collar and method of installation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pipe joint weld collar and method of installation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1953953