西南石油大学学报（自然科学版）
西南石油大學學報（自然科學版）
서남석유대학학보（자연과학판）
JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SEIENCE & TECHNOLOGY EDITION)
2014年
5期
160-168
,共9页
油套管%特殊螺纹%上扣扭矩%构成%影响因素%理论分析
油套管%特殊螺紋%上釦扭矩%構成%影響因素%理論分析
유투관%특수라문%상구뉴구%구성%영향인소%이론분석
tubing and casing%premium threaded connection%makeup torque%composition%influence factors%theoretical analysis
油套管特殊螺纹接头上扣扭矩及其构成对于提高接头结构完整性和密封完整性至关重要。在分析典型上扣扭矩曲线基础上，采用弹性力学厚壁圆筒理论和旋转台肩扭矩公式，建立了特殊螺纹接头上扣扭矩理论计算方法，研究了不同过盈量和螺纹脂摩擦系数对接头总上扣扭矩及其构成的影响规律。结果表明：过盈量和螺纹脂摩擦系数越大，总上扣扭矩越大；螺纹径向过盈量、密封面径向过盈量、螺纹脂摩擦系数越小，台肩面轴向过盈量越大，作用到台肩面扭矩与总扭矩比值越大。总体上，台肩扭矩比值主要受螺纹径向过盈量和台肩轴向过盈量控制，而螺纹脂摩擦系数主要影响总上扣扭矩。建议加强优化公差配合、提高接头加工精度、严格控制上扣圈数并注重优选螺纹脂。研究结果对于确定特殊螺纹接头合理上扣扭矩以及强度计算提供了理论依据。
油套管特殊螺紋接頭上釦扭矩及其構成對于提高接頭結構完整性和密封完整性至關重要。在分析典型上釦扭矩麯線基礎上，採用彈性力學厚壁圓筒理論和鏇轉檯肩扭矩公式，建立瞭特殊螺紋接頭上釦扭矩理論計算方法，研究瞭不同過盈量和螺紋脂摩抆繫數對接頭總上釦扭矩及其構成的影響規律。結果錶明：過盈量和螺紋脂摩抆繫數越大，總上釦扭矩越大；螺紋徑嚮過盈量、密封麵徑嚮過盈量、螺紋脂摩抆繫數越小，檯肩麵軸嚮過盈量越大，作用到檯肩麵扭矩與總扭矩比值越大。總體上，檯肩扭矩比值主要受螺紋徑嚮過盈量和檯肩軸嚮過盈量控製，而螺紋脂摩抆繫數主要影響總上釦扭矩。建議加彊優化公差配閤、提高接頭加工精度、嚴格控製上釦圈數併註重優選螺紋脂。研究結果對于確定特殊螺紋接頭閤理上釦扭矩以及彊度計算提供瞭理論依據。
유투관특수라문접두상구뉴구급기구성대우제고접두결구완정성화밀봉완정성지관중요。재분석전형상구뉴구곡선기출상，채용탄성역학후벽원통이론화선전태견뉴구공식，건립료특수라문접두상구뉴구이론계산방법，연구료불동과영량화라문지마찰계수대접두총상구뉴구급기구성적영향규률。결과표명：과영량화라문지마찰계수월대，총상구뉴구월대；라문경향과영량、밀봉면경향과영량、라문지마찰계수월소，태견면축향과영량월대，작용도태견면뉴구여총뉴구비치월대。총체상，태견뉴구비치주요수라문경향과영량화태견축향과영량공제，이라문지마찰계수주요영향총상구뉴구。건의가강우화공차배합、제고접두가공정도、엄격공제상구권수병주중우선라문지。연구결과대우학정특수라문접두합리상구뉴구이급강도계산제공료이론의거。
The makeup torque and its composition of premium threaded connections are of great importance for improving mechanical and sealing integrity of tubing and casing. On the basis of analysis on typical makeup torque vs. turns curve, the theoretical calculation method of makeup torque for premium threaded connections has been established with the elasticity mechanics theory of thick-wall cylinder and rotary shoulder torque formula. The influences of different interferences and thread compound friction coefficient on the total torque and the ratio of torque acting on shoulder to total torque has also been investigated and the results show that the larger the interferences and thread compound friction coefficient,the higher the total makeup torque. The smaller the thread tooth radial interference,sealing surface radial interference and thread compound friction coefficient or the larger of the shoulder axial interference,the higher the ratio of torque acting on shoulder to total torque. Generally,the ratio is mainly influenced by thread tooth radial interference and shoulder axial interference,while the thread compound friction coefficient mainly affects the total torque. We suggest that enhancement of tolerance matching be optimized,processing precision be improved,makeup turns be strictly controlled and attention to thread compound optimized should be carried out. The study results provide theoretical basis for determining reasonable makeup torque of premium threaded connections and calculating its strength.
