Drilling Mud Recovery and Drilling Cuttings Reuse

Most OBM drilling mud is disposed once drilling work finished. In contrast, much oil-based drilling mud and synthetic-based drilling mud is recycled possible. Sometimes the physical and chemical properties of the used drilling mud have degraded somewhat, and the drilling mud must be processed to rejuvenate the necessary properties.

In other cases, drilling mud have been degraded sufficiently that it cannot economically be reused as new drilling mud.

There are many relatively simple processes that can be used on drilling rigs to capture clean drilling mud that would otherwise be discarded and return for reuse. Like pipe wipers, mud buckets, and vacuuming of spills on the rig floor.

Recovery of mud during tank cleaning may also allow the mud to be reused. Solids control equipment, like centrifuges, can be used to remove solids from the recirculating mud stream.

Some new drilling mud formulations are designed to aid vegetative growth so that the drilling mud can be land-applied. These could have application in horticulture or in reclamation of damaged or low-quality soils.

Drilling cuttings reuse

Drilling cuttings are made up of ground rock coated with a layer of drilling fluid. Most drill cuttings are managed through disposal, although some are treated and beneficially reused. Before the cuttings can be reused, it is necessary to ensure that the hydrocarbon content, moisture content, salinity, and clay content of the cuttings are suitable for the intended use of the material.

Some drilling cuttings, particularly when a saltwater-type mud was used to drill the well, may need washing to remove dissolved salts prior to beneficial use. Water used for washing can be disposed of in an injection well. (yuan.yan@adkosun.com)

Treated cuttings have been used in various ways:

·fill material,

·daily cover material at landfills,

·aggregate or filler in concrete, brick, or block manufacturing.

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