Abstract: A new pneumatic load transfer and shock absorbing system is disclosed. The pneumatic system includes a layer of air-bags to perform two basic functions during a floatover installation operation: 1) lifting the platform deck from the support to create additional air gaps at the mating surfaces, and the heave motions of the lifted platform deck may be reduced; 2) performing as a shock absorbing device with variable vertical stiffness easily controlled by the air-bag internal air pressure during the mating operation and the separation operation.
Type:
Application
Filed:
February 23, 2014
Publication date:
August 27, 2015
Applicants:
China Offshore Oil Engineering Co., Ltd., China National Offshore Oil Corp.
Inventors:
James Lee, Wen Jun Zhong, Han Jun Yin, Xin Zhong Li, Mo Fan, Xiao Hong Zhou, Yuan Lang Cai, Xiao Long Yang, Xiao Wei Zhang, Liang Wang
Abstract: A new jacket design method is disclosed, especially for deepwater water heavy jacket applications. The method utilizes a special type of air bags, called Ship Launching Air Bags (SLAB), to provide low cost temporary buoyancy used for jacket installation purpose only. A designer only needs to satisfy the jacket stiffness for the resistance of environmental and gravity loads without the consideration of jacket reserve buoyancy. The required jacket reserve buoyancy could be increased with the utilization of temporally attached SLABs during the jacket installation.
Type:
Application
Filed:
October 1, 2013
Publication date:
April 2, 2015
Applicants:
China Offshore Oil Engineering Co., Ltd, China National Offshore Oil Corp
Inventors:
James Lee, Han Jun Yin, Zhi Gang Li, Wen Jun Zhong, Xin Zhong Li, Jin Lin Hou, Mo Fan, Xu Jia, Yu Jie Yuan, Huai Zhou Huang
Abstract: An automatic reversing-reposition rocker arm includes a rocker arm body, and the rocker arm body is a steel box beam. A rocker arm pivoting shaft is attached on a middle of the body. The rocker arm body has a ballast tank, a water inlet, and a water outlet. The ballast tank is located in a back end of the rocker arm body. The water inlet is located in an upper edge of the ballast tank. The water outlet is located in a lower edge of the ballast tank. A left side and a right side of a lengthwise forth end of the rocker arm pivoting shaft match each other, and a plurality of connecting devices are attached on the forth end of the rocker arm body. A plurality of gas-liquid buffers connects with the rocker arm body via the connecting devices.
Type:
Grant
Filed:
October 25, 2009
Date of Patent:
May 22, 2012
Assignees:
China National Offshore Oil Corp., China Offshore Oil Engineering Co., Ltd
Inventors:
Zhi Xia Fan, Ru Hua Yuan, Hui Xu, Tao Geng, Huai Liang Li, Yong Li Li, Qing Ren Shen
Abstract: An automatic reversing-reposition rocker arm includes a rocker arm body, and the rocker arm body is a steel box beam. A rocker arm pivoting shaft is attached on a middle of the body. The rocker arm body has a ballast tank, a water inlet, and a water outlet. The ballast tank is located in a back end of the rocker arm body. The water inlet is located in an upper edge of the ballast tank. The water outlet is located in a lower edge of the ballast tank. A left side and a right side of a lengthwise forth end of the rocker arm pivoting shaft match each other, and a plurality of connecting devices are attached on the forth end of the rocker arm body. A plurality of gas-liquid buffers connects with the rocker arm body via the connecting devices.
Type:
Application
Filed:
October 25, 2009
Publication date:
April 28, 2011
Applicants:
CHINA NATIONAL OFFSHORE OIL CORP, CHINA OFFSHORE OIL ENGINEERING CO.,LTD
Inventors:
Zhi Xia Fan, Ru Hua Yuan, Hui Xu, Tao Geng, Huai Liang Li, Yong Li Li, Qing Ren Shen