At the end of November 2020,Henan Ocean Chemical Technology Co.,Ltd.learned about the role of drilling fluid in drilling operations and the strict requirements for drilling fluid in various aspects,which has led to rapid development of drilling fluid technology.After years of scientific research and production practice,drilling fluid has evolved from only meeting the needs of drill bit drilling to a drilling fluid system that meets various needs.For example,polymer drilling fluid with low viscosity,low friction and low solid for fast drilling,anti sticking drilling fluid,anti sloughing drilling fluid for rock characteristics,saturated salt water drilling fluid for drilling salt rock formations,low-density oil in water drilling fluid for protecting oil and gas reservoirs,oil-based drilling fluid for blocking oil and gas channels,and foam drilling fluid for developing low-pressure oil and gas fields.A relatively complete drilling fluid system has been formed.
Nowadays,high-quality drilling fluids are no longer prepared from one or two materials(such as bentonite,commonly known as moving soil),and maintaining the performance of drilling fluids depends on the addition of various treatment agents.For example,drilling fluid lubricants
High temperature stabilizers,anti collapse treatment agents,and anti jamming treatment agents.According to statistics in 1992,the treatment agent series has developed to 10 categories and 202 types,forming an important branch of oilfield chemistry.
The solid particle treatment system in drilling fluid has been strengthened and improved to remove solid particles.The solid particles in the drilling fluid,such as drill cuttings and barite,deteriorate the flow performance of the drilling fluid,not only damaging the stability of the drilling fluid performance,but also increasing the friction force of the circulation system,causing premature wear of the equipment.The main method to remove solid content in drilling fluid is to increase the vibration frequency of the vibrating screen,increase the mesh size of the screen and use a double-layer screen to improve the sand removal efficiency of the sand and mud removers.In addition,sometimes a separator is added to remove fine particles from the drilling fluid.
In order to improve the use and measurement standards of drilling fluids,China has currently adopted advanced American Petroleum Institute standards and specifications,as well as drilling fluid measurement instruments and equipment.
