泥浆压差式钻柱减振器的研究

Mud Pressure Difference Absorber for Drilling Strings

针对现有减振器的减振元件在高温、高压的钻井条件下易疲劳损坏的缺点 ,设计了一种新型减振器。利用钻柱内外的循环压差施加钻压 ,实现了钻头与钻柱的柔性连接。以泥浆作为减振元件来吸收钻进过程中的纵向冲击振动能量 ,减振效果好 ,振动衰减快。它与普通液压式减振器的不同在于减振性能不受温度的影响 ,不贮存钻头所产生的冲击能量 。

In order to overcome the shortcoming of fatigue breakdown of conventional absorber components under high temperature and high pressure,a new absorber is designed,in which drilling mud is used as absorbing components and the circulating pressure difference from the inside and outside of a drilling string is used as bit weight Flexible connection of bit with drilling string is realized Drilling mud is used as absorbing components to absorb the vertical impacting energy during well drilling, in which absorbing is good and vibration damping is rapid It differs from a common liquid pressure absorber because its performance is not influenced by temperature and the impacting energy created by bit is not stored It is a good absorbing tool that can protect the drilling strings and bits, as well as control the weight on bit