论文部分内容阅读
小口径金刚石钻进中，经常出现岩心堵塞的现象，其常规的解决办法无非是改进操作技术，使用孔底减震器以及双管钻具有良好的单动性能（如缩短内管长度，提高钻具的同心度）等，以增加钻具的稳定性。但几年来的实践证明，上述办法事倍功半，收效甚微。我们还曾在内管和短节内壁涂抹黄干油或浇注机油，以减少岩心与短节和内管之间的摩擦阻力，但也未见成效。八二年开始加工镀铬内管和镀铬短节（均为内径镀铬），八三年六月中旬开始应用，以期减少岩心进入短节和内管的阻力，从而减少和消灭堵塞的现象。通过野外生产实际使用，收到了良好的效果，现将试验情况简介如下。
Small diameter diamond drilling often causes core plugging. The conventional solution is nothing more than improved handling techniques. The use of hole bottom shock absorbers and double-pipe drills has good single acting properties (such as shortening the length of the inner pipe and increasing the drilling With concentricity), etc., in order to increase the stability of drilling tools. However, the practice over the past few years has proved that the above measures are less effective and have little effect. We also applied yellow dry oil or cast oil to the inner and the short inner walls to reduce the frictional resistance between the core and the short section and the inner tube, but we also failed to achieve any results. Chromium-coated inner tubes and chrome plated short sections (both inner diameter chrome plating) were started processing in mid-August and began to be applied in mid-June 1983 to reduce the resistance of the core to the short section and the inner tube to reduce and eliminate the clogging. Through the actual use of field production, has received good results, the test situation is as follows.