Development and application of high-efficiency and impact-resistance PDC core bits

Abstract:

In oil and gas， unconventional oil and gas， and scientific drilling， drilling efficiency in sandy mudstone， and interbedded sand and mudstone is low， and the bit service life is short. Through the staggered arrangement of tooth shaped PDC and circular PDC， a new high-efficiency and impact-resistance PDC core bit was developed and tested in Lucaogou Formation of shale in Well 36-4 of Jimusaer Oilfield， Xinjiang. The results showed that the penetration rate of the new type of high-efficiency and impact-resistance PDC core bit was 2.4 to 3.1 times higher than that of other bits， and good social and economic benefits have been achieved.