What are the treatment methods of oilfield mud

• Aug 11, 2021
• The particles in the mud are quickly coagulated and precipitated from the water, so as to achieve the effect of mud-water separation....

In the oilfield mud drilling process, the mud processing will use the following two methods:

1. Mud-water separation

In the process of drilling and pouring, a desander and a vibrating screen are used to separate small gravel, sand and other solid particles in the mud, and the separated mud is discharged to the first sedimentation tank, the second sedimentation tank to the third sedimentation tank to make it fully For sedimentation, the mud pump is installed in the three sedimentation tanks for mud circulation. During the construction process, use an excavator to clean up the first sedimentation tank, the second sedimentation tank, and the third sedimentation tank in time. The cleaned-up sludge is transported to the evaporation tank, and after it is naturally dehydrated and solidified, it is transported to the storage yard. For waste mud water, add a flocculant to the mud water. Since the mud water is a suspension liquid containing a certain amount of fine mud particles in the water, the polymer flocculant is a type of water-soluble polymer. Combine it with the mud water treatment. When mixing, because the flocculant has the functions of bridging, netting, adsorption and electrical neutralization, it can destroy the stability of the mud water and make the particles in the mud quickly agglomerate and settle from the water, thereby achieving the effect of mud water separation.
 

2. Treatment of mud ballast mixture:

① The sludge cleaned out in the sedimentation tank is transported to the evaporation tank and allowed to dehydrate and solidify naturally.

②The dewatered drilling ballast is used as the filling material for the roadbed filling, or transported to the storage yard, or backfilled in the earth borrowing pit.

③The dry mud formed after natural dehydration and solidification is backfilled into the abandoned mud pool on the spot. The sedimentation mud ballast is transported to the evaporation tank, and the clean water is recycled.

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