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The introduction of mud cleaning system

2012-09-13

Concept: Drilling fluid mud cleaning system is to remove the harmful solid phase, reserve the useful solid phase to meet the demand of drilling fluid property under the drilling process. Drilling fluid mud cleaning system is a general term of all drilling fluid solid phase control equipments used in the drilling process.

Function: To prevent the oil-gas passageway from blocking, damaging, and reduce the drilling torque and friction resistance, reduce the pressure fluctuations of the hohlraum suction, increase the drilling speed, extend the life of drilling head, and reduce attrition of the equipments etc.. Methods: The common methods are dilution methods, substitution methods, mechanical methods and chemical methods. Mechanical method is by using screening, centrifugal separation and gravity separation to separate the solid phase according to the different size and density, therefore, to control the solid phase in the drilling fluid.

1 The technology process of the mud cleaning system and the mating of the mud cleaning equipment.

The technology process of complete set of mud cleaning system should meet the requirement of five level solid phase control (screening, degassing, desanding, desilting, centrifuge) and the, aggravating of mud. The optimization of solid control equipment is very important, the throughput of one to five level of mud cleaning equipment should each matching, and the spacing of the separation particle size is appropriate, have certain overlap, make the smaller particles of the processing incomplete in the up one had been disposed in the next solid control equipment.

2 Drilling fluid cycle procedure of the purification

The mud returned from the mouth of well through the pipeline respectively or meanwhile conveyed each drilling fluid shale shaker, after dispose of shale shaker, then entered the sink sand warehouse, the mud overflowed from the sink sand warehouse through the mud slot into the desande warehouse (if encounter gas invasion, can start vacuum degasser,) the mud after processing of the centrifugal through the mud slot enters the inhalation cabin, repeat and recycling by drilling pump