目前 ,长半径水平井所存在的严重问题是加重材料在井壁低边的沉积 ,因此 ,研制一种能在井温异常变化的深水井中防止岩屑下沉的钻井液成为当务之急。最近 ,已研制出一种适合深井的新型低粘酯基钻井液 ,既满足了环保 ,又满足了技术更新的要求。 At present, the serious problem existing in long radius horizontal wells is to aggravate the deposition of materials on the lower side of the borehole wall. Therefore, it is imperative to develop a drilling fluid that can prevent the debris from sinking in deep wells with abnormal temperature changes. Recently, a new low-viscosity ester-based drilling fluid for deep wells has been developed that meets both environmental requirements and technical updates.