对耐火砖衬可接受的椭圆度只可来通过多年观察得来经验取得。
弯管部位管材的椭圆度小于2%,内壁光滑无皱褶,外部壁厚均匀无开裂。
分析比较了紧密距测量以及中径和椭圆度量规测量的误差。
针对套管的不同初始椭圆度建立了套管、水泥环、地层平面应变力学模型。
在该测试中用于测量椭圆度的成椭圆形仪表也可用于大型的测试,但是。
在管道内支持不足,这根管子弯过程中创造一些截面椭圆。
椭圆度测量的准备工作:测量相应的窑筒体和轮带温度。
运用珠粒填料推弯成形工艺成形出的管材截面畸变程度很小,椭圆度不超过1.
经过轧制、焊接和热处理后,钢管存在轴线方向弯曲和横截面椭圆度的缺陷。
1·Casing, cement and formation plane strain mechanical model are established, considering casing with initial ovality.
针对套管的不同初始椭圆度建立了套管、水泥环、地层平面应变力学模型。
2·The cross-section distortion of bent tube is very small by using ball filler push bending process, with the ovality less than 1.5%.
运用珠粒填料推弯成形工艺成形出的管材截面畸变程度很小,椭圆度不超过1.5%。
3·Relevant operation practice has proven that with the optimalized sizing process parameters, steel tubes sized by the said mill possess decreased ovality and higher O. D. accuracy.
生产实践表明,采用优化后的定径工艺参数,钢管的椭圆度减小,外径精度提高。
4·With finite element method, the collapse strength of casing with ovality and eccentricity under unidirectional uniform and ellipse distributive force was calculated and analyzed.
采用有限元法,计算和分析了壁厚不均与椭圆套管在单向均匀和单向椭圆分布外挤力作用下的强度问题。
1·This is an important factor in determining the operating limits of coiled tubing strings since the action of spooling the string tends to induce some ovality.
这是确定挠性管柱工作范围的重要因素,因为挠性管的缠绕趋向于产生某个椭圆度。