Self Standing Riser Offers Alternative to Conventional Deep Water Approach for Developing Marginal Deep Water Oil and Gas Resources

Finite Element Analysis of the Strength of Ladder Type Structure of the Deep-Water AUV

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.1903 ◽

2013 ◽

Vol 690-693 ◽

pp. 1903-1908

Author(s):

Dong Jie Wei ◽

Lian Hong Zhang ◽

Hong Wei Zhang ◽

Fei Liu

Keyword(s):

Deep Water ◽

Oil And Gas ◽

Autonomous Underwater Vehicle ◽

Lightweight Design ◽

Effective Capacity ◽

Material Strength ◽

Element Analysis ◽

Allowable Range ◽

Oil And Gas Resources ◽

Main Frame

Autonomous underwater vehicle (AUV) is one of the current research hotspots in the field of robotics. It has abroad application prospect in the oceanographic survey, resource exploration and military fields. The AUV presented in this paper is mainly used for investigating the deep water oil and gas resources and works in underwater 3000 meters. It carries a series of measuring equipment, such as battery, sensors and pressure-resistant cabins, to engage in exploration tasks. When the AUV is lifted in water or in air, the loads acted on the main frame of AUV are different. In order to realize lightweight design and save buoyancy within the allowable range of the material strength, this paper puts forward a novel ladder type construction with two longitudinal beams and five crossbeams made of stainless steel, and analyzes the forces sustained by the main frame when lifted. Compared with traditional aluminum welding structure frames, the advantages of the trapezoid frame of the deep water AUV are as follows: large effective capacity, strong bearing capability and convenient maintenance. At the same time, using GRP hulls can improve the total structural strength significantly. The validity of the design and analyze is verified by recent at-sea trails.

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PARTICULARITIES RELATED TO DRILLING OFFSHORE WELLS IN AREAS WITH VERY DEEP WATER

Neft i gaz ◽

10.37878/2708-0080/2020.015 ◽

2020 ◽

Vol 3-4 (117-1118) ◽

pp. 93-108

Author(s):

Valentin-Paul TUDORACHE1 ◽

◽

Mihail MINESCU ◽

Nicolae ILIAS ◽

◽

...

Keyword(s):

Deep Water ◽

Oil And Gas ◽

Oil Industry ◽

Offshore Drilling ◽

Starting Point ◽

Oil And Gas Resources ◽

Drilling Operations ◽

High Production ◽

E Mail ◽

Theoretical Results

The article presents an analysis of the realities faced by the operators in the oil industry, but especially the operators in the exploitation of the risers. Oil industry operators are focusing on drilling offshore wells to very deep water depths, as there are significant oil and gas resources that ensure high production. This analysis refers to the establishment of limit conditions that occur during drilling operations. We call this complex of factors the mechanics of riser. The article also refers to establishing the way of working in accordance with the API recommendations in force and obtaining theoretical results for offshore drilling in deep water. *Автор для переписки. E-mail: [email protected] 94 НЕФТЬ И ГАЗ 2020. 3–4 (117–118) БУРЕНИЕ These results are the starting point for simulation with the help of specialized software and obtaining results useful for the exploitation of risers in drilling wells in deep water. Drilling activity in deep water can only be done with dynamically positioned platforms, such as semisubmersibles platforms and drillship.

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