Solids Control

Design and operating principles can be found in suppliers literature. The decanting centrifuge consists of a rotating horizontal centrifuge bowl with a conveyor turning in the same direction but at a lower speed. The slurry is introduced at the centre of the narrow end of the bowl and travels to the liquid overflow at the Solids Control Equipment – Centrifuges

Solids present in the mud will directly affect mud and well costs, and can affect drilling rates, hydraulics, rig equipment, and is also a major cause of stuck pipe and lost circulation.  Volume, size and type of solids present in the mud can influence the: mudgradient viscosity and gel strengths fluid loss filter cake. Mechanical Solids Control – Introduction

Flowlines, shaker header boxes (possum bellies) etc., shall be inspected regularly and cleaned out as required, in order to prevent solids build-up. Ditch magnet to be inspected as required if installed. Jet lines, if fitted, shall also be inspected regularly to ensure that they function properly. Settling tanks shall never be by-passed. Settling tanks shall Solids Control Equipment – Flowlines and Settling Tanks

The importance of shale shakers as the primary solids control equipment capable of handling the full returns from the wellbore cannot be over stressed. They must be operated as efficiently as possible, at all times, in order to maximise the amount of solids removed at the first pass. Solids passing through the shakers will be Solids Control Equipment – Shale Shakers

Design and operating principles can be found in suppliers literature. Mud cleaners consist of a desilter mounted over a fine mesh screen of 150‑240 mesh. The desilter underflow is treated mechanically by the fine 150-240 mesh screen which allows the liquid phase and any barites present to pass back into the circulating tank while the Solids Control Equipment – Mud Cleaners

The hydrocyclone is an inverted conical shaped shell into which pressurised slurry is injected tangentially at the top/wide end. This induces the fluid to flow around the circumference of the shell and downwards to a small opening at its apex. The circular motion develops high centrifugal forces which increase towards the narrow apex. As a Solids Control Equipment – Desanders and Desilters