摘要
目前,国内外对10.0～12.7 mm高压钻管在弯曲半径0.1 m左右时弯曲变形及受力状况的研究仍然存在不足。鉴于此,利用ANSYS研究了高压钻管通过不扩张转向轨道时的形态、截面、壁厚及滑道阻力的变化情况。研究结果表明,高压钻管经过转向轨道后前端向上略微翘曲,其主轴和副轴长度变化量在1 mm以内,壁厚在副轴方向上受压的一侧增加,受拉的一侧减小,但增加量和减小量都可以忽略不计;滑道阻力波动与轨道的曲率变化基本一致,最大值达到841N。该研究结果与试验结果吻合,可以为轨道设计、高压钻管优选及送进工艺设计提供理论根据。
There exist weaknesses in domestic and foreign research on the bending deformation and force condition of the 10.0-12.7 mm high pressure drillpipe with the bending radius being 0.1 m.Therefore,the ANSYS software was adopted to study the variation of morphology,cross-section,wall thickness and slideway resistance of high pressure drillpipe through the non-expansion steering trajectory.The research findings show that the front end of the drillpipe warps up slightly after it goes through the trajectory.The main and accessory shafts vary within 1 mm.The wall thickness increases on the pressure side in the direction of the accessory shaft and it decreases on the tension side.However,the increase and decrease can be negligible on the whole.The slideway resistance fluctuation is basically in agreement with the curvature variation of the trajectory,with the maximum value being 841 N.The research findings are in agreement with the test result and can provide the theoretical basis for trajectory design and high pressure drillpipe optimization.
出处
《石油机械》
北大核心
2012年第7期59-62,96,共5页
China Petroleum Machinery
基金
国家科技重大专项"煤层气深穿透射流技术
钻井液技术及开发技术集成评价研究"(2011ZX05060)
关键词
不扩孔
转向轨道
高压钻管
截面
壁厚
变形
滑道阻力
non-reaming
steering trajectory
high pressure drillpipe
cross section
wall thickness
deformation
slideway resistance
