Patents Assigned to SUBSEA DEPLOYMENT SYSTEMS LIMITED
  • Publication number: 20110164926
    Abstract: There is provided a method and apparatus for lowering and/or raising a load or structure to or from the bed of a body of water. The apparatus comprises a buoyancy apparatus configured to be coupled to a load, and having positive buoyancy sufficient to lift the load. At least one receptacle is provided on the apparatus for receiving a control weight lowered from a vessel to lower or raise the assembly. The lowering method includes forming an assembly from a buoyancy apparatus and a load and submerging the assembly to a position at a first height above the bed. In a preferred embodiment the assembly is submerged by a clump weight tow system. A control weight is deployed from a vessel to the assembly to overcome the positive buoyancy of the assembly and thereby lower the load from the first height to the bed. The raising method reverses the steps of the lowering method.
    Type: Application
    Filed: October 15, 2009
    Publication date: July 7, 2011
    Applicant: SUBSEA DEPLOYMENT SYSTEMS LIMITED
    Inventors: Arnbjorn Joensen, Samuel David Irvine Paul