Viscosity should not be below 45 sec / qt . maintain with xcd rather than with bentonite . monitor hole cleaning at shakers and adjust low end rheology as required 要使钻井液粘度不低于每夸脱45秒，就要用生物聚合物来维护，而不用膨润土。通过振动筛观察井眼是否干净，按要求把最终的流变性调低些。
2.
Viscosity should be maintained above 45 sec / qt . maintain with xcd rather than with bentonite . monitor hole cleaning at shakers and adjust low end rheology as required 钻井液粘度应当保持在每夸脱45秒左右，要用生物聚合物来维护，不要用膨润土。通过振动筛观察井内是否干净，按要求把最终的流变参数调低。
