Development of a Device for Evaluating Lost Circulation Materials at High Temperature High Pressure
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摘要: 为了模拟深海钻探中的高温高压堵漏环境,通过查阅国内外文献,制定了DL-3A型高温高压堵漏评价仪器的结构以及工作原理,解释了仪器操作过程中的操作步骤和主要参数,并分别采用了2种桥接堵漏材料对仪器进行了实际测试。结果表明,DL-3A型高温高压堵漏评价仪器的测试容器和测试模块温度能达到260℃高温并保持,封堵压力和返排压力能达到10 MPa以上并保持,可见DL-3A型高温高压堵漏评价仪器能够较好地模拟深海钻探中的高温高压条件,为现场堵漏施工提供了参考。Abstract: A device (Model DL-3A) used for evaluating the performance of lost circulation materials at high temperature and high pressure was developed to simulate the deep sea HTHP working environment in which mud losses occur and are being stopped. Relevant literatures at home and abroad were consulted when determining the structure and working principle of the device. This paper explains the operating procedures and the major operating parameters of the device. Test of the device were performed using two bridging LCMs. The test results showed that the testing container and the testing modules of the Model DL-3A device can be heated to 260 ℃ and maintain this temperature, the plugging and flowback pressures can reach and maintain at 10 MPa or higher, indicating that the Model DL-3A device can be used to simulate the HTHP conditions encountered in deep water drilling. The testing results of lost circulation materials with this device can provide a certain reference for performing mud loss control in field operations.
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