CAJ | 학술논문

在常规井眼中，钻柱在充有钻井液的井筒内运动时会引起波动压力，破坏井眼系统压力平衡，导致井喷、井漏和井塌或卡钻等井下复杂情况和事故。在小井眼中，由于水力学系统各流道组合发生了改变，预测和控制小井眼波动压力就显得尤为重要。文章结合小井眼钻井实例，定量分析了有关因素对小井眼波动压力的影响，提出了在小井眼起下钻中，严格控制起下钻速度的重要性。
재상규정안중，찬주재충유찬정액적정통내운동시회인기파동압력，파배정안계통압력평형，도치정분、정루화정탑혹잡찬등정하복잡정황화사고。재소정안중，유우수역학계통각류도조합발생료개변，예측화공제소정안파동압력취현득우위중요。문장결합소정안찬정실례，정량분석료유관인소대소정안파동압력적영향，제출료재소정안기하찬중，엄격공제기하찬속도적중요성。
Surge pressure will be aroused in a conventional borehole,when a drilling string is moving in the well bore filled with drilling fluid,by which the pressure equalization in the borehole system will be destroyed,thus causing the complicated downhole circumstances and accidents as well blowout,lost circulation and well slough or drill-pipe sticking,etc.Owing to the fact that various flow path assemblages in hydraulic system have been changed in a slim hole,it is even more important to predict and control the surge pressure in the slim hole.In combination with an example of drilling slim hole,the influence of relevant factors on the surge pressure in the slim hole is quantitatively analyzed and the importance to strictly controlling the velocity of round trip in the slim hole is proposed in the paper.