Drilling fluids have different properties with the help of various materials. These have been very simple in the past, but today, due to the need for more complex drilling fluids and more control, the use of various additives in the field has been considered. PHPA or acrylamide polymer is one of the substances that can have interesting effects on drilling oil and gas wells. If you would like to know the features of this polymer and its effect on drilling fluids, follow us in this article.
Introduction to PHPA polymer
It is, as its name implies, a long, heavy chain molecule. The molecule is composed of identical and hydrophilic monomers. Because of these properties, they are also dissolved in long fibers like water.
The same properties make this polymer used in some drilling fluids. The main feature of the PHPA polymer is the ability to remove drilled logs from the well wall. Simply, this material can contain drilling rigs like a cage and prevent them from dissolving in drilling fluid and over-sealing them.
Acrylamide polymer is supplied and used in both solid and liquid states. Of course, the two materials are similar in both modes and have the same properties. In fact, based on specific ratios, solid acrylamide polymer can be obtained from liquid acrylamide polymer.
Application of PHPA polymer in drilling
The drilling fluid made from this material is also called PHPA fluid. As stated briefly, this material is commonly used in water based fluids, and increases the stability of active shales in it.
Another application of this material in the drilling fluid is to block the fine slits in the formation, which is possible by coating the surface with the polymer.
PHPA is also used as a material to increase viscosity, reduce friction and coagulate. All of these features can be used in fresh and saline waters.
Another application of this polymer is its use in wells cleaning fluids. One of the most important activities in the drilling industry is to wash wells and remove carcasses from wells. In scientific terms, this operation is called sweep well. But for this operation, a fluid must be used which, in addition to having a high viscosity (intended to coagulate and transport carcasses), will also increase the stability of the well so as to prevent the well wall from falling during the well wash operation. For this reason, the PHPA fluid can be considered a suitable fluid for washing or repairing wells.
PHPA Fluid Benefits
The use of this PHPA polymer in drilling fluid has many advantages; the following are the most important ones in the catalog.
1- Provide stable conditions for shale wall
2- Encapsulate the stumps and prevent them from spreading
3- Increase the ease and speed of mixing operations in PHPA polymer fluid
4- Increase the carrying capacity of the carcasses in the floor drilling system
5- Optimization of solid waste disposal operations in the pure water system
6- Ability to use PHPA fluid in cold areas due to low spill point
7- Provides lubrication capability in most light and heavy fluids with active and passive solids
8- Better disposal of viscous solids
9- Prevent drip flushing
10- Reduce the drilling fluid pressure drop in the well by removing the stumps attached to the wells and pipes.
Finally, this polymer is one of the polymers that due to its very effective properties, has been the focus of attention in drilling fluid and chemical drilling companies in recent decades.