Field Testing of Submersible Cable
The increased number of installations of submersible pumps in the oilfield has brought about an increased need for decreasing the operating costs associated with the cable. The devices and methods of field testing the cable are explained, and the results of application of different testing parameters and techniques are evaluated. The effect of temperature on the insulating material is presented. Specifications and standards for manufacturing and factory testing of submersible cable are also discussed.
Field test technology relationships to cable quality
One of the most controversial issues in the field of cable technology involves trying to determine the status of used cable. There is no consensus within the industry or even among the so-called "experts" as to how this decision should be made. This paper identifies methods and limitations of techniques used by different organizations. These range from recommended practices to company guidelines. A model for insulation is presented. The results of the model are compared with common criteria used to evaluate power cable status. Criteria for any installation are addressed. Simply for convenience, detailed analysis will be applied specifically to electric submersible pump (ESP) cable.
Evaluation of buckling load and dynamic performance of steel shear wall retrofitted with strips made of shape memory alloy
One of the most imperfections of the steel shear wall is out of plane displacements that cause severe damage in both structural and non-structural elements. In this paper, the effects of shape-memory alloys on steel shear walls are investigated. First, a numerical analysis using the finite element method in ABAQUS software has been carried out according to an experimental test. The results of the numerical analysis have been verified with experimental results. Next, shape-memory alloy fibers have been added vertically and horizontally to various parts of the steel shear wall. The results show that retrofitting with the shape-memory alloy reduces the out-of-plane displacement of the steel shear wall under both cyclic and seismic loadings. Besides, the buckling load in the steel shear wall increases when it is retrofitted with the shape-memory alloy. Also, the total out-of-plane movement (accumulated absolute displacements) of the steel shear wall and non-structural damage are controlled by the characteristic of a shape-memory alloy material called “super-elastic”.