Other

Exxonmobil Upstream Research Company

Exxon Production Research Company

Mark A Danaczko

Robert E Sandstrom

Lyle D Finn

W Brett Wilson

Mark E Ehrhardt

M Sidney Glasscock

Mark C Gentry

Michael P Piazza

William S Mathews

Kenneth M Steele

Paul W Sibal

Timothy Otis Weaver

Dawn L Rymer

Robert E Foglesong

Robert D Denton

Provided is a submersible offshore platform configured to be installed at a sea floor installation site and a method of installing the offshore platform. The offshore platform may include: a primary node and a primary column disposed thereon; a plurality of support nodes; a plurality of pontoon sections, each of the plurality of pontoon sections configured to connect the plurality of support nodes to the primary node or to each other; a plurality of buoyant modules, wherein each of the plurality of buoyant modules is detachably connected to a respective support node; and a primary column support system, wherein the primary column support system includes: a plurality of vertical supports fixed around a perimeter of the primary column, each of the plurality of vertical supports having one end connected to the primary column node; and a support structure connecting a top portion of each of the plurality of vertical supports to the primary column.

Submersible offshore platform and method of installing the same

Provided is a composite tower structure and a method of designing and assembling the same, the composite tower structure including: a tower body, a foundation to which a bottom end of the tower body is fixed, a plurality of vertical supports disposed around a perimeter of the tower body, and a support structure connecting a top end of each of the plurality of vertical supports to the tower body. The composite tower structure may further include one or more intermediate guide structure(s) connected to the tower body and supporting a middle portion of the plurality of vertical supports.

Monolithic towers having support structures, and method of designing and assembling the same

A method and system for transporting fluid is described. The method includes coupling a transit vessel to a terminal vessel associated with at least one terminal. The transit vessel and the terminal vessel are coupled at an open sea or lightering location, which may be selected based upon operational conditions. Then, cryogenic fluid is transferred between the transit vessel and the terminal vessel, while the transit vessel and terminal vessel are moving in substantially the same direction. Once the transfer is complete, the terminal vessel decouples from the transit vessel and moves a terminal to provide the cryogenic fluid to the terminal. The cryogenic fluid may include liquefied natural gas (LNG) and/or liquefied carbon dioxide (CO).

Transporting and transferring fluid

A complaint offshore platform in which the primary restoring force to lateral displacement is established by flex piles driven into the seafloor and fixedly secured to the platform legs a preselected distance above the seafloor. The platform includes a substantially rigid space-frame structure extending from the ocean bottom to a position above the ocean surface. A drilling and production deck is secured atop the space-frame structure. Shear piles extend through the base of the space-frame structure to prevent lateral displacement of the base while permitting the space-frame structure to pivot about its base. As the platform sways about its base in response to environmental forces, the flex piles establish a vertical couple at the location at which they are attached to the space frame structure. This couple resists movement of the platform away from a vertical orientation. In the preferred embodiment, the flex piles are secured to the platform at or near one-half the total height of the space-frame structure.

Compliant offshore platform

Growing community of inventors

Houston, TX, United States of America

Mark A Danaczko