what effect does the drilling mud additives have ?
Drilling mud additives are used in the drilling process, it can be said that the drilling of blood, also known as drilling fluid. Drilling fluid composition can be divided into water, mud, clay-free rinse, emulsion, foam and compressed air. Water is the first to use drilling fluid, no treatment, easy to use, suitable for intact rock and water areas. Mud is widely used drilling fluid, mainly for loose, crack development, easy to collapse block, water swelling flaking and other pore wall unstable rock.
In the early days of rotary drilling, the main function of drilling mud aids was to carry cuttings from the bottom of the well to the ground. Currently, drilling fluids are recognized as having at least the following ten functions:
(1) clean the bottom of the well and carry debris. Keep the bottom of the well clean, avoid repeated bit cutting, reduce wear and improve efficiency.
(2) Cool and lubricate drill bits and drill string. Lower bit temperature, reduce tool wear and improve the service life of the drill.
(3) balance the side wall rock pressure, the formation of filter cake in the borehole wall, closed and stable wall. Prevent contamination of oil and gas layers and collapse of borehole wall.
(4) Balance (control) formation pressure. Prevent blowout, lost circulation, to prevent formation fluid drilling fluid pollution.
(5) suspended debris and weighting agent. Reduce the rate of debris settlement, to avoid sinking card stuck.
(6) In the ground to remove sand and cuttings.
(7) The effective transfer of hydraulic power. Delivering the power needed for downhole power tools and drill bit hydraulic power.
(8) to bear part of the weight of the drill pipe and casing. The buoyancy of the drilling fluid to the tool and casing reduces the load on the lifting system during drilling.
(9) provide a lot of information on the formation to be drilled. The use of drilling fluid can be electrical logging, debris logging, etc. to obtain downhole data.
(10) Hydraulic crushing of rocks. The high-velocity jet formed by the drilling fluid through the nozzle can directly crush or assist in crushing the rock.
The above is the top 10 roles for drilling mud additives, which can reduce a lot of work for our drilling work.