Drilling fluid

The invention provides drilling fluid which comprises the following components in parts by weight: 100 parts of slurry preparation water, 0-0.6 part of a pH regulator, 0.8-3.0 parts of a bagged multifunctional material and 0-100 parts of a weighting agent. The drilling fluid has the characteristics that the preparation is simple, a system is formed by one agent and two agents, and the on-site application and adjustment are very easy; the drilling fluid is excellent in performance, excellent in rheological property and filtration loss control, outstanding in shale coating inhibition, and capable of keeping a borehole clean and stable; and the drilling fluid is economical, environment-friendly, non-toxic, degradable, simple in treatment and low in comprehensive cost. The drilling fluid can meet the requirements of current environment-friendly low-cost rapid drilling and has a wide application prospect. 一种钻井液，包括100重量份配浆水、0至0.6重量份的pH调节剂，0.8至3.0重量份一袋化多功能材料、0至100重量份加重剂组成。本钻井液的特点是：配制简单，一两个剂即成体系，非常易于现场应用及调整；性能卓越，具有优异