首页> 外文期刊>日本船舶海洋工学会論文集 >大深度掘削ドリルパイプの強度評価手法に関する研究
【24h】

大深度掘削ドリルパイプの強度評価手法に関する研究

机译:深钻钻杆强度评估方法研究

获取原文
获取原文并翻译 | 示例
           

摘要

地球深部探査船「ちきゆう」は、最大掘削深度(ドリルス トリング長)10,000mという大深度掘削能力を有するように 設計・開発が行われた。大深度掘削においては、ドリルスト リングの長大化に伴い、ドリルパイプに作用する外力も大き くなるため、作業状態に相応した外力の推算が重要となる。%During drilling operation various forces are exerted on a drill pipe such as a tension due to the weight of the drill string and vessel heave, as well as a bending stress due to vessel movement and ocean current. There is also a hoop stress due to holding by conventional tools "slips" which translate axial load to transverse load. As drilling depth increases, the hoop stress can become greater and can actually damage or in the extreme case crush the drill pipe, called slip-crushing. So, it is necessary to evaluate maximum stress which is assumed to be obtained by superimposing these stresses corresponding to actual drilling operation. There is also another possible strength problem - fatigue strength. Since drilling operation progresses by rotating the drill strings under the condition that it will be bent due to vessel motion, the bending stress will act as an iteration stress. Especially in deep drilling, since the tension on the top of the drill string acting as an average stress become greater, the fatigue strength will be descended. Therefore, it is necessary to establish the method of strength evaluation of the drill pipe including consideration of the hoop stress and evaluation of fatigue strength which can become critical in deep drilling. This paper describes the method of strength evaluation of drill pipe for deep drilling by means of conducting the strength evaluation using it.
机译:深探船“ Chiyu”的设计和开发具有10,000 m的大深度钻探能力(钻柱长度)。在深井钻探中,随着钻柱长度的增加,作用在钻杆上的外力也会增加,因此估算与工作条件相对应的外力很重要。 %在钻进操作期间,钻杆上会受到各种力的作用,例如由于钻柱的重量和沉船而产生的拉力,以及由于船只运动和洋流引起的弯曲应力,以及由于通过传统工具“滑移”来固定,将轴向载荷转换为横向载荷。随着钻削深度的增加,环向应力会变大,实际上会损坏或在极端情况下压碎钻杆,称为打滑。因此,有必要评估假定通过叠加与实际钻井作业相对应的最大应力而获得的最大应力。还有另一种可能的强度问题-疲劳强度。由于钻井作业是在以下条件下旋转的:容器运动时,弯曲应力将作为迭代应力,尤其是在深井钻探中,因为钻柱顶部的张力为平均应力b因此,有必要建立一种钻杆强度评估的方法,包括考虑环向应力和疲劳强度的评估,而疲劳强度的评估在深井钻探中将变得至关重要。深孔钻杆强度评估的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号