大家知道,在钻井过程中,往往需要向井内下入中间套管。原来下中间套管所用浮箍的回压凡尔大多为钢质或生铁的。这种浮箍的缺点是成本较高,可钻性差,而且在钻掉水泥塞后,井下往往留下许多钢铁碎块,妨碍继续钻进。针对这些问题,我们采用尼龙6制作浮箍的回压凡尔。通过几年的现场试用证明,这种尼龙浮箍避免了钢质或生铁浮箍所存在的 As we all know, during the drilling process, it is often necessary to lower the middle casing into the well. The original under the middle of the floating tube used in casing back pressure most of the steel is either steel or pig iron. The disadvantage of this float collar is its high cost and poor drillability. After drilling the cement plug, many steel fragments are often left downhole, preventing further drilling. In response to these problems, we use nylon 6 back float pressure Float. After several years of field trial proved that this nylon float hoop to avoid the presence of steel or pig iron float hoop