Applied Drilling Circulation Systems - Hydraulics, by Boyun Guo

By Boyun Guo

Used to wash the borehole, stabilize rock, keep an eye on pressures, or increase drilling charges, drilling fluids and their stream platforms are utilized in all stages of a drilling operation. those structures are hugely dynamic and intricate to version beforehand. This publication offers engineers and scholars with the mandatory analytical/numerical types to address difficulties linked to the layout and optimization of cost-efficient drilling stream structures. the one booklet which mixes process modeling, layout, and gear, this e-book presents a transparent and rigorous exposition of conventional and non-traditional circulate structures and gear through self contained chapters bearing on procedure modeling functions. Theories are illustrated by means of case experiences in accordance with the author’s actual existence event.

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Example text

Different flow equations have been used in the industry to calculate pressure losses in drill strings and annuli. S. units is 519 in the SI units. The Fanning friction factor f is a function of the Reynolds number NRe and a term called the relative roughness. The relative roughness is defined as the ratio of the absolute roughness over the pipe diameter, where the absolute roughness represents the average depth of pipe-wall irregularities. 3 shows the absolute roughness of some pipe surfaces. For laminar flow, the friction factor is replaced by f = N16Re .

Plotting the data will help to identify the type of fluid. Then the rheological properties associated with the fluid model can be determined. 5) where Ν = rotary speed of Fann VG meter, rpm θN = dial reading of Fann VG meter at rotary speed N If the rotary speed of the Fann VG meter is set at 300 rpm, Eq. 5) degenerates to μ = θ300, where θ300 is the dial reading of the Fann VG meter at the rotary speed of 300 rpm. 6) where θN1 = dial reading of Fann VG meter at rotary speed N1 θN2 = dial reading of Fann VG meter at rotary speed N2 If the rotary speeds of the Fann VG meter are chosen to be N1 = 300 rpm and N 2 = 600 rpm, Eq.

Near the top end of the feed chamber, the inlet nozzle enters tangentially to the inside circumference and on a plane perpendicular to the top-to-bottom central axis of the hydrocyclone. The hydrocyclone obtains its centrifugal field from the tangential velocity of the slurry entering the feed chamber. An axial velocity component is created by the axial thrust of the feed stream leaving the blind annular space of the feed chamber. 19, in which T and A represent the tangential and the axial velocity components, respectively.

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