What is modified polyacrylamide drilling fluid?

Indeed, modified polyacrylamide drilling fluid has been proven to be of great interest for use in the construction of bored piles and diaphragm walls in recent years. 1. Introduction Drilling fluid is a critical component in exploration and excavation, classified into water-based, oil-based, synthetic-based, and gas-based.

What is water based drilling mud?

Water-based drilling mud comprises 80 percent water and 20 percent drilling additives. Lesser water content in drilling fluid can minimise the shale swelling. In contrary, high water content in drilling fluid may have drawbacks such as high shale, friction, and mud filtrate volume with low plastic viscosity.

Why is polymer mud used in drilling?

Polymer mud was initially developed to improve the drilling efficiency. Acrylamide (PAM), a polymer flocculation agent, was firstly used in the drilling mud as early as 1958. PAM was called total flocculent because it can flocculate drilling cuttings and bentonite . A little PAM added in mud can drive the drilling cuttings out of the well.

What is polyacrylamide non dispersed drilling mud?

The polyacrylamide non dispersed drilling mud of less soildphase was first used in 1966 by Pan Am, which greatly improved the drilling rate. And then it was spread in the world and tested in different strata, well depth and density. In addition, it has obvious advantages in the case of drilling speed improving and cost saving.

Can polyacrylamide be used for drilling?

However, polyacrylamide with high molecular weight can be a good candidate at lower concentrations to meet the drilling requirements. The viscosity of polyacrylamide at all concentrations decreases with increasing temperature, according to Magzoub et al. (2021).

What is polyacrylamide used for?

Hence, it is an earth-stabilising fluid that is designed for a variety of applications in the geo-construction industry such as tieback anchors, diaphragm walls, horizontal drilling, tunnelling, slurry trenching, drilled shafts/bored piles, and others. 6.1. Polyacrylamide in drilling technology