Drilling oil fluid mud purification process

ZJ90DB type oil rig mud purification system process design to meet the drilling fluid of sieve - gas - desanding - except the mud - centrifugal level 5 solid control and mud aggravating, shear and requirements.

Drilling fluid cleaning circulation process wellhead out of the mud through the pipeline can be separately or at the same time delivery to three vibrating screen, after vibrating screen processed into 1 tank sinking sand bin, from heavy sand bin overflow out of the mud after mud overflow tank into the sand bin, in addition to the sand pump suction sand bin mud, mud through the pipeline to desander, desander process after the mud after mud overflow tank into the mud warehouse, in addition to the mud pump can be from mud bin suction mud through the pipeline to desilter, after desilter process after the mud after mud overflow tank into the no. 2 tank centrifuge warehouse (if encounter gas, can activate vacuum degasser, from sand bin suction mud degassing after the no. 1 tank mud bin), the centrifuge process after the mud after mud overflow tank into the no. 2 tank purification bin, and then into the 3-5 suction tank, by drilling mud pump repeat pump people well internal circulation use.

Double centrifuge system flow of work Medium speed centrifuge and high speed centrifuge series composition double machine system, used for processing weighted mud, can remove harmful solid phase, the control mud viscosity, recycling iron ore powder. In this system, the medium speed centrifuge is located in the first, will be separated to iron ore powder into mud tank to recover iron ore powder. Medium speed centrifuge will discharge liquid first into a turn slurry tank, reoccupy pump to turn slurry tank in the middle of the liquid pump people high speed centrifuge, high-speed centrifuge separation out of solid discharge tank outside, liquid is back to the circulation system, using double centrifuge system can effectively remove harmful solid phase, and can prevent a lot of waste iron ore powder. In dealing with the weighted mud, simply operation medium speed centrifuge can.

Aggravating process mud configuration and aggravated by special equipped with mud weighting system to complete. Mud weighting system by weighting pump, mix slurry funnel, suction and discharge line composition, installed on the 7 tank back. Aggravated pump through the aggravating intake manifold can suction 3 to 9 tank each bin mud, aggravated by 6 inches of discharge line will mud delivery to 3 to 9 tank each bunker. 2 sets of aggravating pump can achieve interchangeable, namely have a weighting pump failure, another pump through the conversion suction and discharge valve can instead of the work. Aggravated pump and shear pump drainage pipeline using cast steel elbow, intake and drainage pipeline has the lowest position drain, blowdown unit. When using heavier mud in conventional weighting mixing device failure, the system can through the high pressure weighting system is aggravating, low pressure weighting system through the parallel pipeline and high-pressure gate valve for high pressure weighting system for liquid with low pressure increase.

Drilling suction process 3 station infusion pump and 3 table mud pump suction line connected, in drilling process, according to the need to start the corresponding bottom valve, 3 station infusion pump can be alone or at the same time suction 3-9 can the warehouse of the mud. Shared three infusion pump through the valve groups respectively to three table mud pump forced grouting, and realize as spare, namely have 1 infusion pump failure occurs, the other a through the conversion suction and discharge valve can instead of the work. Mud pump suction installation have mud filter, the packaged type filter unit.

Grouting process Perfusion tank is located in wellhead and 1 between tank and two infusion pump installed in grouting can end, in the drilling process can use grouting pump to wellhead perfusion mud, perfusion tank needs to supplement mud, usable aggravate pump through the low pressure slurry pipeline will purification process after the mud transported to the grouting tank.

Shear mixing process for polymers, etc to decomposition, hydration and agitating slurry material that can be through the shear pump and mixed funnel get fast evenly mixed. Shear pump from 7 can split out shear bin in suction processing fluid repeated shear mixing, shear the mixture of drugs can be through the conveying pipeline to suit tank drug storehouse, drug warehouse within the drug can through the output line and mud tank into 3 to 5 suction tank.