石油矿场机械
石油礦場機械
석유광장궤계
OIL FIELD EQUIPMENT
2015年
6期
38-42
,共5页
PDC 钻头%锥形 PDC 齿%花岗岩%机械钻速
PDC 鑽頭%錐形 PDC 齒%花崗巖%機械鑽速
PDC 찬두%추형 PDC 치%화강암%궤계찬속
PDC bit%conical PDC tooth%granite rock%ROP
为了提高 PDC 钻头的破岩效率和钻头寿命，研制了一种与常规 PDC 复合片不同的锥形 PDC齿。设计并加工了5种不同齿形的锥形 PDC 齿，在试验室进行了耐磨性、抗冲击性和破岩试验。分析了锥形 PDC 齿的磨损形式和冲击损坏形式，并与常规 PDC 切削齿的耐磨性及抗冲击性进行了对比，探讨了锥顶直径和切削角对锥形 PDC 齿的耐磨性和抗冲击性的影响规律；分析了锥形PDC 齿的锥顶直径、切削角、切削深度等参数对锥形 PDC 齿受力的影响规律，并与常规 PDC 齿的受力进行了对比分析。试验结果表明：在相同吃入深度下，锥形 PDC 齿的综合受力普遍低于常规PDC 齿，在硬岩中可以获得更高的破岩效率。这些室内试验数据为锥形 PDC 齿结构改进和新型PDC 钻头设计提供了理论依据。
為瞭提高 PDC 鑽頭的破巖效率和鑽頭壽命，研製瞭一種與常規 PDC 複閤片不同的錐形 PDC齒。設計併加工瞭5種不同齒形的錐形 PDC 齒，在試驗室進行瞭耐磨性、抗遲擊性和破巖試驗。分析瞭錐形 PDC 齒的磨損形式和遲擊損壞形式，併與常規 PDC 切削齒的耐磨性及抗遲擊性進行瞭對比，探討瞭錐頂直徑和切削角對錐形 PDC 齒的耐磨性和抗遲擊性的影響規律；分析瞭錐形PDC 齒的錐頂直徑、切削角、切削深度等參數對錐形 PDC 齒受力的影響規律，併與常規 PDC 齒的受力進行瞭對比分析。試驗結果錶明：在相同喫入深度下，錐形 PDC 齒的綜閤受力普遍低于常規PDC 齒，在硬巖中可以穫得更高的破巖效率。這些室內試驗數據為錐形 PDC 齒結構改進和新型PDC 鑽頭設計提供瞭理論依據。
위료제고 PDC 찬두적파암효솔화찬두수명，연제료일충여상규 PDC 복합편불동적추형 PDC치。설계병가공료5충불동치형적추형 PDC 치，재시험실진행료내마성、항충격성화파암시험。분석료추형 PDC 치적마손형식화충격손배형식，병여상규 PDC 절삭치적내마성급항충격성진행료대비，탐토료추정직경화절삭각대추형 PDC 치적내마성화항충격성적영향규률；분석료추형PDC 치적추정직경、절삭각、절삭심도등삼수대추형 PDC 치수력적영향규률，병여상규 PDC 치적수력진행료대비분석。시험결과표명：재상동흘입심도하，추형 PDC 치적종합수력보편저우상규PDC 치，재경암중가이획득경고적파암효솔。저사실내시험수거위추형 PDC 치결구개진화신형PDC 찬두설계제공료이론의거。
In order to improve the efficiency of the rock breaking of PDC bit and bit life,a conical PDC tooth is developed,which is different from conventional PDC.Five different conical PDC tooth were designed and processed,experimental evaluation of the abrasion resistance and impact resistance test and broken rock test were made in lab.Evaluation analysis was made for the conical PDC tooth wear and impact damage,and compared with conventional PDC cutter abrasion resist-ance and impact resistance were compared and the cone top diameter and cutting angle of conical PDC the influence law of tooth abrasion resistance and impact resistance were discussed.Analysis of the conical PDC tooth cone top diameter,cutting angle and cutting depth the influence law of parameters of conical PDC tooth stress were made as well,and compared with conventional PDC tooth stress contrast analysis.The test results show that in the same depth,the conical PDC tooth of comprehensive stress is generally lower than that of conventional PDC tooth,so in the hard rock it can obtain higher efficiency of rock fragmentation.The experiment data for conical PDC tooth structure improvement and new type of PDC bit design provides a theoretical basis.
