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SC DRILLTECH · KNOWLEDGE LIBRARY

Engineering Knowledge Library

Now 173 technical articles across the solids-control & drilling-waste library — grounded in API RP 13C, 13B & 13D, growing continuously.

📥 New — Free Field Guides & Checklists20 printable PDFs: RP 13C screen chart, inspection cards, audit checklists, worksheets — free for the field. →

Solids control, drilling fluids and drilling-waste management — the complete field-tested library including the Mud Plants & Bulk mega-guide, the working knowledge behind the train, written from 26+ years on the rig.

Engineering Calculations 49

Backreaming & hole cleaning
Backreaming can clear a cuttings bed that won't move any other way — but it risks pack-off, swabbing and overpull, and dumps the bed on the shaker as a slug. When it helps and when it hurts.
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Hole-cleaning sweeps
High-vis sweeps clean vertical holes but channel over the bed in deviated wells. The tandem sweep — low-vis to erode, then weighted to lift — is the deviated answer. Why sweeps need rotation, and why the shaker reads them.
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Swab & surge pressures
Swab (pulling pipe) drops bottomhole pressure toward a kick; surge (running in) raises it toward a fracture. Why high solids and gel strength make both worse, and why conditioning the mud before tripping is a solids job.
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Torque & drag from solids
Rising torque and drag is often a solids problem the shaker sees first. How cuttings beds add to the string's friction factor, and why torque and drag is the early warning before pack-off and stuck pipe.
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The true cost of poor solids control
Poor solids control bills you five ways: dilution, disposal, pump and bit wear, lost ROP, and ECD-driven losses. Why the system that looks cheapest is quietly the most expensive on the rig.
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Owned vs rented solids control
Own the equipment or rent it with a service crew? The trade-offs, and why the real cost isn't the rental line but whether the equipment is operated to perform. A decision guide.
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Dilution ratio & dilution factor
Dilution factor (API RP 13C) is the dilution you needed versus what you'd need with no removal system — a scorecard for solids-control performance. The definition, the dilution-volume formula, and a worked example.
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Solids-control cost per foot
Cost per foot turns solids control into a measurable performance number. What goes into it, why mechanical removal beats dilution barrel for barrel, and how a good system saves six figures a well.
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When to run a centrifuge
On unweighted mud, run it high-G to strip fine solids cyclones can't catch. On weighted mud, run it low-G to recover barite, not throw it away. A decision guide for when the centrifuge earns its place.
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Barite alternatives
Hematite (SG ~5.0), ilmenite (~4.6) and Micromax (~4.8) vs API barite (4.1-4.2). Their specific gravities, the abrasion and iron trade-offs, and what a higher-gravity weighting material means for solids control.
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Riserless mud recovery (RMR)
RMR uses a subsea pump to return top-hole mud and cuttings to the rig instead of dumping them on the seabed — turning the one section with no solids control into a full solids-control operation.
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MPD and solids control
In managed pressure drilling the mud is a pressure medium managed to the psi — so drilled solids that shift its density and rheology threaten the pressure window. Why solids control becomes a well-control function in MPD.
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Average specific gravity of solids (ASG)
On weighted mud, percent solids hides what matters. ASG splits barite from drilled solids using only mud weight and the retort. The formula, a worked example, and why a falling ASG warns of drilled solids.
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Hole cleaning in horizontal wells
In a horizontal well cuttings fall to the low side and build beds. Why 30-60° is the dangerous angle, why annular velocity alone won't clear a bed, and why pipe rotation is the real lever.
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LCM and shaker screens
LCM must stay in the mud to seal losses, but most is too coarse to pass the screen. Why bypassing shakers to keep it builds ECD and makes losses worse — and what to do instead.
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The solids-control mass balance
Drilled-solids removal is a mass balance, not an equipment reading. Every barrel of solids has four destinations — out with cuttings, out by dilution, retained, or left downhole. How to close the balance.
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Barite recovery by centrifuge
On weighted mud you can't remove all solids without discarding barite. Two centrifuges in series — a low-speed one recovers barite, a high-speed polisher strips fine drilled solids. How the density split works.
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Gel strength explained
Gel strength is what suspends cuttings and barite when the pumps stop — but too much spikes the pressure to break circulation. 10-second vs 10-minute gels, flat vs progressive, and how solids drive them.
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Barite sag
Barite sag is weighting material settling out of the mud; driven by low shear-rate viscosity and deviated holes.
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The API sand content test
The fastest field check of the coarse abrasive fraction — the volume percent of solids larger than 74 microns.
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Screen blinding vs plugging
A flooding shaker screen has plugged or blinded — same symptom, opposite fixes. A wedged near-size particle vs a film plastered over the mesh, and how to correct each.
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Solids-control equipment order
The solids-control train has one correct sequence — shaker, degasser, desander, desilter, centrifuge — each removing finer solids. Why the order protects the system and where the degasser goes.
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Shale shaker G-force explained
G-force is the engine of shaker separation: G = N²A/π²g, scales with RPM squared; the trade-off with screen life.
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How a hydrocyclone works
A hydrocyclone turns feed pressure into a vortex — coarse solids out the apex, clean fluid out the vortex finder.
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Equivalent circulating density (ECD)
ECD is mud weight plus annular friction — where solids control meets well integrity via PV.
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Drill cuttings vs drilled solids
Drill cuttings and drilled solids come from the same bit but have opposite fates: cuttings are removed at surface on the first pass; drilled solids are the finer fraction that stays in the mud and degrades. Why the distinction decides your strategy.
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How a decanter centrifuge works
A decanter centrifuge is the final mechanical stage: a bowl and scroll turning at a differential speed throw fine solids to the wall above 1,000 G. The two levers that tune it — pool depth and differential speed.
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Retort analysis explained
The retort measures oil, water and solids — but the number that counts is the low-gravity-solids split hidden inside. How to read a retort and split the solids the way it actually matters. A 12.0 ppg mud at 20% solids carries ~12.5% LGS.
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API screen number vs mesh
A screen's mesh count describes its weave; its API Screen Number (RP 13C) describes what it separates — the D100 cut point. Two same-mesh screens can cut differently. Select on the API number and conductance, not mesh.
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Mud cleaner: when to use it
A mud cleaner is desilter cones over a fine screen, built to recover barite on weighted mud. Above ~10.5 ppg a bare desilter dumps barite. When it pays — and when a fine-screen shaker beats it.
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Sizing a hydrocyclone bank
Size the bank to process 100%+ of the flow into its suction tank, not the circulation rate. 10" desander ~500 gpm, 4" desilter ~60 gpm at 75 ft head, plus 100 gpm backflow.
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OBM vs SBM vs WBM solids control
The mud type sets the strategy: cheap WBM runs the full aggressive train; expensive OBM/SBM drop the cyclones for fine screens and a high-speed centrifuge to save the base fluid.
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Vertical cuttings dryer: the basics
Cuttings leave the shaker >12% oil. A vertical dryer (high-G screen centrifuge) recovers base fluid and drops OOC below ~5%.
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Cuttings re-injection (CRI) basics
CRI grinds cuttings into slurry and injects it below a fracture — permanent, contained, zero-discharge disposal. The full chain.
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Zero-discharge solids control
Zero discharge = nothing to the environment. The waste streams, the routes (dryer/CRI/haul), and why solids control decides the cost.
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Cyclone roping: field decision tree
Spray is the target, rope is the fault. Confirm head, then offload upstream, open the apex, add cones — not just crank pressure.
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Centrifuge wet-cake troubleshooting
A sloppy cake = not enough force/time on the beach. Work bowl speed, feed rate, pond depth in order to dry it without losing the cut.
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Top shale-shaker operating mistakes
The shaker sets the load on everything downstream. Flooded, wrong screen, wrong angle, bypass, poor tension, uneven feed — each fix.
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High LGS: root-cause decision tree
Above ~10% LGS the fluid is untreatable. A decision tree that separates a mechanical bypass from an ultrafine overload before you burn mud.
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Runaway dilution cost
Runaway dilution is a removal-efficiency problem, not chemistry. Because dilution costs 3–4× the volume, a few points move six figures.
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Daily solids-control checklist
A tour-by-tour round — shakers, cyclones, centrifuge, mud report, discard — that catches a stage dropping out before the retort does.
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How often to change shaker screens
Screen life runs 20 hrs to 22 days — but it's condition, not the clock. The four signals that say change now.
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What micron does a desilter remove?
A desilter removes ~15–44 micron solids with small 4–5in cones — finer than a desander, coarser than a centrifuge.
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Linear vs balanced-elliptical shakers
Linear: high-G, dry cuttings, more screen wear. Elliptical: gentler (3–4.5G), longer screen life, beats blinding in gumbo.
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What is a good solids-removal efficiency?
SRE runs 60–90%; above 70% is good, above 85% very good — held without dumping expensive mud. Benchmarks explained.
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Drilled-solids generation rate
Calculate how fast the bit makes solids — from hole size, ROP and porosity — to size the train and read removal efficiency.
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Normal drilled-solids percentage
Low-gravity drilled solids should stay below ~5% by volume. What's normal, how the retort splits it, and why 2 points move rig days.
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Oil–water ratio (OWR) from the retort
OWR straight from retort data — the ratio that sets emulsion stability on oil-based mud, with a worked example. API RP 13B-2…
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Chloride & salinity by titration
Chloride and NaCl salinity from a silver-nitrate titration — the formula, strength factors and a worked example. API RP 13B-1…
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Alkalinity Pf, Mf & lime content
What Pf, Mf and Pm mean, carbonate vs bicarbonate, and lime content as 0.26(Pm − Fw·Pf) — worked example. API RP 13B-1…
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LGS vs HGS from one retort
Split total retort solids into drilled solids and barite by a mud-weight material balance at SG 2.6 and 4.2…
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Stokes' Law settling velocity
Why fine drilled solids won't settle in a pit — and why the shaker and centrifuge, not gravity, must remove them…
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Decanter centrifuge G-force (RCF)
RCF = 1.118×10⁻⁵·r·N² — why G-force, not RPM, sets the cut point, with a worked example on an 18-inch bowl…
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Lag time & bottoms-up
Annular volume ÷ pump output — tie the cuttings on your shaker back to the depth they actually came from…
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Cuttings volume generated
How much solid a hole section really makes — hole capacity × interval × (1−porosity), the solids-control and waste load…
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Annular velocity & carrying capacity
AV = 24.5·Q/(Dh²−Dp²) and the transport ratio — hole cleaning vs the solids load hitting your shakers…
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Drilling-waste disposal cost
Turn cuttings volume into a disposal cost — bulk dry cuttings for retained fluid, then × the haul-and-treat rate…
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Equipment Performance & Optimization 11

Feed-pump TDH & system head curve
Total dynamic head, the system curve, and where a feed pump actually runs — so your cyclones get their design head. Worked example.
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Vertical cuttings dryer & ROC
How a vertical cuttings dryer strips base oil off OBM/SBM cuttings, what retention-on-cuttings (ROC) means, and the recovery it delivers.
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Shaker deck angle & conveyance
How deck angle trades fluid throughput against cuttings conveyance, why +3° is the ceiling, and reading the pool and beach to set it.
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Centrifuge bowl tip speed & wear
Why tip speed — not just G-force — sets the mechanical limit and the wear rate on a decanter bowl. v = πDN with a worked example.
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Screen blinding & near-size particles
Why shakers plug: near-size particles wedge and blind screens. Plugging vs blinding, and the opposite fixes for each.
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Feed-pump NPSH & cavitation
The silent killer of cyclone and centrifuge feed. Calculate NPSH available and stop starving your pumps. Worked example.
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Sizing hydrocyclone banks by cone count
How many desander/desilter cones you actually need: 100–125% of suction flow ÷ per-cone capacity, with feed-head target.
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Pump affinity laws
Flow scales with speed, head with the square, power with the cube. Tune feed head without tripping the motor. Worked example.
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Centrifuge sizing by sigma (Σ)
The equivalent settling area that scales a centrifuge from pilot to field. The tubular-bowl formula and the Q/Σ scale-up law.
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Vacuum degasser & gas-cut mud
Why a 50% surface density cut is only ~3% at bottomhole, when to reach for the degasser vs weighting up. Grounded in JPT.
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Agitator sizing & tank turnover
Sizing mud-tank agitators by turnover rate so barite and drilled solids stay suspended instead of sagging. Worked TOR example.
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Shale, Stability & Equipment Efficiency 5

Shale dispersion (hot-roll recovery)
Measure shale reactivity with %R = W1/W0 — and why dispersed shale dumps fines your shakers can't catch. Hot-roll recovery test.
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Shale accretion & bit balling
The accretion bar test, the accretion % formula, and why sticky clay wrecks ROP, torque and the solids reaching surface.
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Drilled solids, ECD & the stability window
How weak solids control raises ECD until it crosses the fracture gradient and the section starts losing mud. Grounded in API RP 59.
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Centrifuge recovery efficiency
The solids mass balance that tells you what RPM won't: how much of the feed solids actually left in the cake.
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Shale shaker capacity & solids loading
Match screen throughput to flow and solids rate — and why reactive-shale cavings surges flood the deck.
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Mud Plants & Bulk Systems 41

★ Complete guide — start here
The full Mud Plants & Bulk pillar: 41 articles across 11 clusters — storage, mixing, bulk, transfer, reconditi…
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Inside a liquid mud plant
A map of the liquid mud plant (LMP): the bulk-silo side, the mixing system, the segregated…
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What a mud plant does that the rig can't
Why drilling-fluid operations are centralised at a liquid mud plant rather than handled at…
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The supply base & offshore logistics
How a liquid mud plant fits the offshore supply base: the flow of bulk and fluids between…
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Mud plant layout & plot plan
How a liquid mud plant is zoned and laid out: the plot plan that separates bulk, mixing,…
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Storage tank farm & segregation
How a mud plant stores finished and in-process fluids: the segregated tank farm with…
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Agitation: keeping mud uniform
Why stored drilling mud must be continuously agitated: the physics of barite settling,…
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Base oil & brine storage
How a mud plant stores base oil and clear brines: hydrocarbon vapour, flash point and fire…
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The mixing & shearing system
How a mud plant mixes and shears drilling fluid: jet hoppers and eductors for wetting and…
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Jet hoppers & eductors
How jet hoppers and eductors disperse additives into drilling fluid: the venturi principle…
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Building & weighting a mud system
How a mud plant builds and weights a drilling-fluid system: starting from base fluid,…
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Bulk silo systems
How a mud plant stores and meters dry bulk: the pressure silo and aerated cone, the rotary…
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Pneumatic conveying & weighing
How a mud plant conveys and weighs dry bulk: dense-phase versus dilute-phase pneumatic…
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Dust collection & control
How a mud plant controls dust: bin vents on silos, central baghouses and filter-receivers…
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Barite & bentonite handling
How a mud plant handles barite and bentonite: bulk receipt and silo storage, the cohesive…
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Bulk transfer to/from vessels
How dry bulk is transferred between a mud plant and a supply vessel: dense-phase conveying…
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Liquid mud transfer operations
How a mud plant moves liquid fluids in operation: tank-to-tank and tank-to-vessel…
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Vacuum units & recovery
How a mud plant recovers spilled and residual fluid: vacuum units that lift dirty fluid…
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Ship-to-shore transfer operations
How fluids and bulk are transferred between a mud plant and a supply vessel: the ship-shore…
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Transfer line cleaning & pigging
How a mud plant clears transfer lines between fluids: why the heel contaminates the next…
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Reconditioning returned mud
How a mud plant reconditions mud returned from the well: removing accumulated low-gravity…
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Solids removal at the plant
How a mud plant removes drilled solids from returned fluid: shale shakers for the coarse…
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Slops collection & segregation
How a mud plant collects and segregates slops: capturing line flushes, sump and bund…
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Drilling waste at the supply base
How drilling waste is handled at the supply base: receiving back-loaded cuttings and waste…
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Wash water & effluent management
How a mud plant manages wash water and effluent: capturing deck and equipment wash-down,…
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The mud plant laboratory
What the mud plant laboratory does: the API RP 13B tests it runs — density, rheology, fluid…
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Quality control before supply
How a mud plant assures quality before fluid leaves: confirming each batch against the…
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Mud plant HSE & hazardous areas
The HSE essentials of a liquid mud plant: hazardous-area classification and ignition…
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Spill containment & environmental
How a mud plant prevents and contains spills: bunding and secondary containment sized to a…
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Confined space & safe handling
Two everyday mud-plant hazards: confined-space entry into tanks and silos with permits,…
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Tank farm design & bunding
How a mud plant's storage tank farm is designed: vertical agitated tanks sized for…
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Piping, manifolds & hoses
The fluid and bulk transfer network of a mud plant: dedicated piping per fluid, manifolds…
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Pump selection
How a mud plant chooses pumps: centrifugal pumps for transfer and circulation,…
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Power, air & utilities
The utilities behind a mud plant: electrical power and distribution to motors and…
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Instrumentation & controls
How a mud plant measures and controls itself: load-cell weigh systems, level, density and…
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Commissioning & installation
What it takes to install and commission a liquid mud plant: civil and mechanical…
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Barite sag in storage
Why barite settles in mud-plant storage and how to prevent it: the physics of sag in static…
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Silo bridging & conveying faults
The common dry-bulk faults in a mud plant: silo bridging and rat-holing, blocked or worn…
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Cross-contamination between fluids
How fluids get cross-contaminated in a mud plant — shared lines and pumps, residual heels,…
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Dust & emissions problems
Dust and emission faults at a mud plant: blinded or failed bin vents, baghouse problems,…
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Transfer & vessel-loading problems
What goes wrong during mud-plant to vessel transfer: slow or blocked bulk and liquid…
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LMP audit & advisory
Independent, vendor-neutral liquid mud plant audits and advisory from SC DrillTech: bulk…
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Solids Control 3

Reactive vs inert solids
Both read as low-gravity solids — but one you inhibit and the other you remove. Treat them the same and you pay…
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Primary vs secondary solids control
The shaker is primary; cyclones, mud cleaner and centrifuge are secondary — dividing the cut by…
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Removal efficiency (η)
Drilled-solids removal efficiency — written η (eta) — is the single most useful number in solid…
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Equipment 10

Mud cleaner vs desilter
The same cones — but the screen underneath decides whether you keep your barite or pay to dump it on weighted…
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Shaker screen API → micron chart
The full API RP 13C cut-point chart, why mesh is obsolete, and how to read a screen…
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Degasser vs mud-gas separator
Entrained gas vs free gas, conditioning vs well control — and the poor-boy naming…
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Hydrocyclone feed head
Hydrocyclones — desanders and desilters — are the only major piece of solids-control equipment …
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The pit train in order
You can buy the best shakers, the sharpest cones and the biggest centrifuge on the market and s…
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Shaker motion and G-force
Two shakers can carry identical API RP 13C screens and perform completely differently — because…
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Desanders and desilters
Desanders and desilters are the same machine at two sizes. Both are banks of hydrocyclones — co…
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The degasser
Of all the equipment in the pit room, the degasser is the one most likely to be misunderstood a…
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Tanks, agitation and turnover
Spend on the best shakers, cones and centrifuge on the market and you can still run a poor soli…
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The mud cleaner
On a weighted mud, a bank of desilters becomes a liability: barite is ground to pass 200 mesh (…
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Method 10

Reading a shaker
Pick a shaker screen by “mesh” alone and you are guessing. Mesh count never described what a sc…
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The sand content test
The sand content test is the cheapest, fastest measurement in the entire mud-check kit — a glas…
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The daily solids-control report
Most solids-control losses are invisible not because they are hard to see, but because no one i…
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Microns, mesh and cut points
Strip solids control down to one sentence and it is this: sorting particles by size, and removi…
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Retention on cuttings (ROC)
Retention on cuttings (ROC) is the mass of fluid clinging to discharged solids after the separa…
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The solids-control rig audit
A solids-control audit is a systematic inspection of the entire surface separation train — equi…
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The methylene blue test
What the MBT tells the solids engineer — how much of your solids load is reactive clay versus inert grind, and what to do…
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The retort test
The most honest instrument on the mud bench — oil, water and solids, and how to split solids into LGS versus barite…
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The fluid-loss test
API and HPHT filtration, what filtrate and cake really tell you, and why your drilled-solids load decides the cake…
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The electrical stability test
How tough your invert emulsion is — the fast ES read, and why water-wet solids quietly drag the number down…
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Centrifuge 7

High-speed dewatering vs barite recovery
A decanting centrifuge is the most flexible machine on the solids-control train — and the most …
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How a decanter centrifuge works
Bowl, scroll, pool and a 2–5 micron cut — the working principle and its two opposite jobs…
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Pool depth & differential speed
The two levers — deep pool for the cut, shallow for volume; low differential for dry cake…
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Centrifuge feed rate & the cut
Feed rate is retention time — your cut-point dial from outside the bowl, balanced against torque…
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Dual-centrifuge setups
Slow then fast — middle-speed keeps the barite, high-speed dumps the fines, in series…
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Why centrifuges fail
The decanting centrifuge is the most capable machine on the solids-control train and the one mo…
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Centrifuge capacity and run hours
A decanting centrifuge that sits idle while dilution climbs is one of the most common and least…
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Drilling Fluids 9

Plastic viscosity & yield point
Two viscometer readings, opposite meanings — PV is your solids gauge, YP your carrying capacity. The Bingham model and the…
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Gel strength & thixotropy
How your mud holds barite when the pumps stop — the 10-second and 10-minute gels, and what the gap between them…
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Bingham vs power law vs Herschel-Bulkley
Three rheology models from the same viscometer — and why the simplest one over-predicts exactly where it…
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OBM vs SBM
Same invert family, different base fluid — and the base decides toxicity, discharge and total…
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Low-gravity solids, the retort, and the dilution they force
Every problem solids control exists to solve comes down to one quantity: low-gravity solids (LG…
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Marsh funnel viscosity
The Marsh funnel is the most-used and most-misunderstood instrument on the rig. It is quick, ru…
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Mud weight, barite and sag
Solids control spends most of its attention on the solids it wants out — but it has an equally …
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Plastic viscosity, yield point and what they tell the solids engineer
To diagnose what solids are doing to the mud, you need two numbers from a rotational viscometer…
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Non-aqueous drilling fluids
Non-aqueous drilling fluids (NADF) — OBM and SBM — change the solids-control job in fundamental…
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Completion Filtration 4

Brine clarity & NTU
What “clean” completion brine actually means — turbidity targets, API RP 13J, and why particle size matters as much as NTU…
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The filter press (DE)
Diatomaceous-earth filtration for bulk solids — precoat, body feed, and where the press sits in the brine train…
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Cartridge & bag filtration units
The final polish to NTU spec — micron ratings, nominal vs absolute, Beta-rating and coarse-to-fine staging…
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Brine filtration troubleshooting
Hitting NTU without killing throughput — blinding, breakthrough, DE release and the staging that fixes them…
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Regional / MENA 4

Drilling waste disposal: GCC & MENA
Where Gulf drilling waste goes — CRI, thermal, landfarming, evaporation, and the move to zero discharge…
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Onshore desert operations
Evaporation pits, landfarming, CRI and thermal — running desert waste so the climate works for you…
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Cuttings disposal routes
Injection, thermal and land — the real routes for drill cuttings and how to choose between them…
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Oil on cuttings & discharge limits
The OSPAR 1% limit, EPA no-free-oil rule and GCC zero-discharge — the number that decides where waste goes…
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DWM 8

Coagulation vs flocculation
Two chemical steps that let a centrifuge pull clean water from waste mud — charge neutralization, then polymer…
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Cuttings dryer vs centrifuge
Two machines, one recovery train — the dryer recovers the fluid, the centrifuge cleans…
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Five drilling-waste-management mistakes that quietly cost you money
Drilling waste management is where solids control meets the environment — and the budget. The h…
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Cuttings dryers
On an oil- or synthetic-based-mud well, the cuttings dryer is usually the single biggest lever …
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Dewatering chemistry
A dewatering unit is only as good as the chemistry feeding it. The centrifuge, the filter press…
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Closed-loop and zero-discharge
A closed-loop system removes the one thing solids control has always quietly leaned on: the res…
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Cuttings re-injection (CRI)
Cuttings re-injection (CRI) takes drilling waste, converts it into a pumpable slurry, and injec…
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Thermal desorption units (TDU)
The vertical cuttings dryer drives OOC to roughly 3–5%. For many regulatory environments that i…
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Solids Control Performance 4

Solids control performance KPIs
The six numbers that decide it — SRE, LGS, dilution ratio, ROC, screen life and cost per foot…
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Solids loading & ROP
The feedback loop — drilled solids you don’t remove slow the bit, and the slow bit makes more solids…
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The cut-point cascade
Shaker to centrifuge — each stage catches a finer band, and a dropped band is where LGS climbs…
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Screen conductance & utilization
Cut point vs conductance, NBA and utilization — the API RP 13C numbers that set the shaker’s ceiling…
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Performance 5

D50 vs D100 cut point
A cut point is one number on a curve — D50 is the median, D100 is total separation, and which one changes the…
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Efficiency that keeps the bit turning
Solids control is often filed under “cost centre” — equipment you run because you have to. That…
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Differential sticking
Differential sticking is the most expensive single failure mode in drilling — and one of the mo…
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Solids control on HPHT wells
HPHT drilling — BHT above 150 °C and/or pore pressures exceeding 10,000 psi — is where the soli…
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ECD management
Equivalent circulating density (ECD) is the effective mud weight the formation sees while the p…
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Economics 1

Cutting dilution cost
Most solids-control losses are invisible because the system never stops running. Nothing trips,…
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Compliance 1

Drilling-waste environmental compliance
Environmental compliance used to be paperwork the HSE department handled after the well was dri…
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History 1

The history of solids control
Most people assume solids control started on a drilling rig. It didn’t. The equipment standing …
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SC DrillTech Rig IQ — solids control and drilling-waste management platform
Stop reading the calculations. Start running them.

Every formula in these guides runs live in Rig IQ — on your own shift data, with the dilution economics and a report-ready output, and an AI engineering director reading the numbers with you. Grounded in API RP 13C · 13B · 13D.

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