E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/51
E21B 43/12 (2006.01) E21B 17/01 (2006.01)
Patent
CA 1136545
ABSTRACT OF THE DISCLOSURE A buoyancy system for large scale underwater risers is provided, comprising a plurality of canisters. Each of the canisters extends partially around the circumference of a riser -- usually, two canisters and the support structure surround a riser -- and a plurality of canisters is associated with each riser section. Air is injected into the lowermost canister or canisters, at a pressure sufficient to displace the contained water within the canister; and when the water level within a canister is lowered sufficiently that a port in a cross connected tube is uncovered, the compressed air enters the tube and travels upwardly to the next canister above, where the unwatering sequence is repeated. Because very great depth can be accommodated -- 3,000 meters or more -- provision is made for reflooding the canisters in the event of an emergency. Additionally, because of pneumatic considerations, different configurations of cross tube are provided for installation in the canisters at varying depths. The support structure for the canisters, and the plastics materials of which the canisters are made -- cross linked polyethylene is preferred -- preclude permanent deformation and damage to the canisters during storage or upon impact with an unyielding body or surface.
336655
Gardner Kenneth
Hale Neville E.
Fathom Oceanology Limited
Hewson Donald E.
LandOfFree
Buoyancy system for large scale underwater risers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Buoyancy system for large scale underwater risers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buoyancy system for large scale underwater risers will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-284655