Oilfield drilling is a complex and challenging engineering activity aimed at extracting oil and natural gas from underground reservoirs. However, drilling fluid often produces foam problems during use. Therefore, defoamers for oilfield drilling are needed to effectively solve the foam problem.
Application of defoamers for oilfield drilling
During the drilling process, the drilling fluid needs to be stirred and circulated at high speed by a pump. This violent mechanical movement causes a large amount of air to be drawn into the drilling fluid. The air is wrapped by components such as surfactants in the drilling fluid to form stable foam.
The presence of foam reduces the density and rock carrying capacity of the drilling fluid. The drilling fluid cannot effectively carry the cuttings from the bottom of the well to the ground, which may cause the cuttings to accumulate in the well, affecting the normal drilling of the drill bit and thus reducing the drilling speed. It will also change the pressure transmission characteristics of the drilling fluid, making the pressure on the well wall uneven.
The molecules of the defoamer for oilfield drilling can penetrate into the foam film. These molecules have a special structure. Once they enter the foam film, they will destroy the order of the molecules in the film, reduce the thickness of the foam film, reduce the stability of the foam film, and cause the foam to burst.
Defoamers for oilfield drilling play an irreplaceable role in oilfield drilling operations. It is like a silent guard, always dealing with the foam problems that may arise at any time during the drilling process. With the increasing challenges faced by drilling operations, the requirements for drilling fluid performance are also more stringent, and the performance requirements for defoamers for oilfield drilling will continue to increase, such as higher defoaming efficiency, stronger environmental adaptability, and better compatibility with new drilling fluid systems.
