Coalbed methane is showing its importance day by day. Now there are many different ways to exploit it. However, people all have to deal with one problem–how to treat the drilling mud. Drilling mud systems / drilling solids control system are essential in coalbed methane drilling and a good drilling mud system can greatly improve the efficiency of coalbed methane explotation.
Characteristics of Coalbed Methane Drilling
The coal gas bed is usually contains methane, which mainly exists in an adsorbed state. Its generation mechanism is the process of depressurization, analysis, diffusion, and permeation. The coal bed has a double pore structure, and its mechanical and physical properties are different. Compared with conventional sandstone, it has factors such as shallow burial depth, low pressure, looseness and easy compression, and development of endogenous fissures.
Brightway CBM drilling mud system
Drilling mud system in important to coalbed methane drilling
The characteristics of Drilling Mud System is key to the of coalbed methane drilling as follows:
- The completion and drilling work requires that the maximum well deviation of the coalbed methane well is not greater than 3°, and the horizontal displacement of the bottom hole is less than 20m. Choose a reasonable combination of drilling mud system and optimize the drilling mud system to ensure the quality of the well.
- Use clean water and water mixed drilling fluid, focusing on prevention of collapse and complex conditions caused by well collapse.
- Establish a reasonable drilling mud system, speed up the drilling speed, and reduce the time of coal seam intrusion.
Brightway CBM drilling mud system